Commit Graph

573 Commits

Author SHA1 Message Date
Jim Warner
e691f75b81 top: let's honor <Esc> key on color mapping screen too
Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-23 22:03:56 +10:00
Jim Warner
291d98ee50 top: make rcfile duplicate fields check more efficient
Jeeze, there was no need to employ *both* strchr() and
strrchr() when ensuring fields hadn't been duplicated.

So let's avoid one of those function calls completely.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-23 22:03:56 +10:00
Jim Warner
949a3c9c2e top: a tweak to the recent 256-color termninal support
We now use the actual terminfo 'max_colors' value with
the 'color mapping' screen, not that hard coded '256'.

Reference(s):
https://gitlab.com/procps-ng/procps/issues/96
. introduced 256 color support
commit cf057d2fe5

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-13 22:11:29 +10:00
Jim Warner
9ea85bc653 top: treat all of those vertical scroll keys uniformly
When not displaying all tasks (the 'i' toggle is off),
the concept of vertical scrolling has no real meaning.

However, only 2 keys (up/down) impacting that vertical
position were currently being disabled with this mode.

This patch will extend such treatment to the following
additional vertical impact keys: pgup,pgdn,home & end.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-13 22:11:28 +10:00
Jim Warner
9dd7a97c4a top: force return to row 1 for thread mode transitions
This program does a good job of policing that vertical
scrolled position, ensuring that total tasks are never
exceeded. However, during transitions from thread mode
to normal task mode (the 'H' toggle) that wasn't true.

And while there was no real harm done, it did make the
use of up/down arrow keys "appear" disabled especially
if that scroll message was not displayed ('C' toggle).

This patch simply forces a return to row #1 whenever a
user toggles that display between thread & task modes.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-13 22:11:28 +10:00
Jim Warner
42f0a341ba top: fix 'iokey()' flaw preventing proper translations
As it turns out, the very first entry in the 'iokey()'
tinfo_tab was preventing the proper translation of the
simulated PgUp/PgDn keys (ctrl+meta+k/j). Ignoring the
tortured history behind the most recent change to that
entry, this patch restores the previous value and once
again properly translates these particular keystrokes.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-13 22:11:28 +10:00
Jim Warner
cf057d2fe5 top: provide the means to exploit a 256-color terminal
With the Qualys security audit, we began to harden our
treatment of the top rcfile. In particular, the values
read were checked so as to prevent some malicious user
from editing it in order to achieve an evil objective.

However when it came to colors I was surprised to find
that at least one user edited the rcfile for 256-color
support. Unfortunately, our new checks prevented this.

So this commit will provide the means to exploit those
extra colors with no need to manually edit the rcfile.

Reference(s):
https://gitlab.com/procps-ng/procps/issues/96

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-06-07 21:35:59 +10:00
Jim Warner
fe23360520 top: sanitized some potentially corrupt 'Inspect' data
This guards against rcfile 'Inspect' entries which may
include non-printable characters. While this shouldn't
occur, we have no real control over those crazy users.

[ and, while such data can't be used maliciously, it ]
[ does adversely impact such a user's screen display ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-31 20:28:32 +10:00
Jim Warner
434530a038 top: prevent buffer overruns in 'inspection_utility()'
When a Qualys patch was reverted as being unwarranted,
1 specific problem their patch had, in fact, prevented
was re-introduced. This patch corrects that oversight.

Reference(s):
. qualys patch revert
commit c502678715

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-31 20:28:32 +10:00
Jim Warner
a42742b0df top: add another field sanity check in 'config_file()'
Until the Qualys security audit I had never considered
it a possibility that some malicious person might edit
the top config file to achieve some nefarious results.

And while the Qualys approach tended to concentrate on
the symptoms from such an effort, subsequent revisions
more properly concentrated on startup and that rcfile.

This commit completes those efforts with 1 more field.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-31 20:28:32 +10:00
Jim Warner
cc5c9e6c1e top: don't mess with groff line length in man document
I've long since forgotten why the attempt to influence
groff line lengths was made. However, I did receive an
email regarding problems formatting postscript output.

Hopefully this patch will eliminate any such problems.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-31 20:28:32 +10:00
Jim Warner
c699f2e26d top: just respond to the increased command name length
The command name for running tasks is displayed by top
in a variable length field, so the increase from 16 to
64 bytes was not a problem. However, there's one place
where top is sensitive to length - insp_view_choice().

So, this patch just bumps a buffer used to display it.

Reference(s):
. increased 'comm' length
commit 2cfdbbe897

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:48:13 +10:00
Jim Warner
607edc2064 top: eliminate a couple of warnings of -Wunused-result
Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:47:58 +10:00
Jim Warner
de807a639f top: ensure sane rcfile values for the remaining stuff
This will protect some remaining rcfile variables from
a possible manual editing of top's configuration file.

[ and correct two #error related boo-boos introduced ]
[ with the system default rcfile in the commit shown ]

Reference(s):
. introduced /etc/topdefaultrc
commit 3e6a208ae5

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:47:02 +10:00
Jim Warner
129b7e2b44 top: Prevent out-of-bounds writes in PUFF(). __Tweaked
This commit moves some overhead to the Batch mode path
where it's needed. And given the new 'else if' test we
can delete some now redundant logic in the other path.

Reference(s):
. original qualys patch
0117-top-Prevent-out-of-bounds-writes-in-PUFF.patch
commit 059ae8b512

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:46:07 +10:00
Jim Warner
d34c6eb5b4 top: address 'show_special()' o-o-b read/write concern
This patch addresses a potential (but unlikely) buffer
overflow by reducing, if necessary, a memcpy length by
3 bytes to provide for an eol '\0' and 2 unused buffer
positions which also might receive the '\0' character.

[ note to future analysis tool: just because you see ]
[ binary data being manipulated in the routine, that ]
[ doesn't mean such function was passed binary data! ]

Reference(s):
. original qualys patch
0116-top-Fix-out-of-bounds-read-write-in-show_special.patch
commit ed8f6d9cc6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:45:36 +10:00
Jim Warner
2fb269a5b0 top: Fix out-of-bounds read/write in show_... REVERTED
I'm reverting this patch to prepare for some alternate
solution. In that solution I will address point #1 but
point #2 is based on a wrong assumption. There will be
no binary data ever found in the 'glob' passed to this
show_special() function. It is now always simple text.

------------------------------------------------ original commit message
This patch fixes two problems:

1/ In the switch case 0, if sub_end is at the very end of lin[], the two
null-byte writes are off-by-two (a stack-based buffer overflow). Replace
this end-of-string "emulation" with an equivalent test on ch (and then
goto/break out of the loop).

2/ "sub_end += 2" jumps over the null-byte terminator in lin[] if the
line contains a raw (without a tilde) \001-\010 character. Detect such a
null-byte terminator and goto/break out of the loop.

Note: in the case of a raw \001-\010 character, the character at
"sub_end + 1" is never processed (it is skipped/jumped over); this is
not a security problem anymore (since 2/ was fixed), so we decided not
to change this behavior, for backward-compatibility.
------------------------------------------------------------------------

Reference(s):
. original qualys patch
0116-top-Fix-out-of-bounds-read-write-in-show_special.patch
commit ed8f6d9cc6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:44:35 +10:00
Jim Warner
fdb58974e2 top: prevent buffer overflow potential in all routines
Whereas that original patch (since reversed) addressed
some symptoms related to manually edited config files,
this solution deals with root causes. And it goes much
beyond any single top field by protecting all of top's
fields. Henceforth, a duplicated field is not allowed.

Reference(s):
. original qualys patch
0114-top-Prevent-buffer-overflow-in-calibrate_fields.patch
commit c424a64331

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:44:11 +10:00
Jim Warner
72ddc1c33d top: Prevent buffer overflow in calibrate_... REVERTED
Here, again, we have an example of attacking a problem
by addressing the symptoms. And that assertion made in
the original commit message is true if only if someone
had manually (maliciously) edited the top config file.

So let's reverse the original patch & thus prepare for
a proper solution addressing the cause, not a symptom.

Reference(s):
. original qualys patch
0114-top-Prevent-buffer-overflow-in-calibrate_fields.patch
commit c424a64331

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:43:08 +10:00
Jim Warner
c502678715 top: Protect scat() from buffer overflows. ___REVERTED
The whole idea was to make top's 'scat' function small
and very quick, unlike that standard 'strcat' routine.

To achieve that end we ignore the potential for buffer
overruns and trust callers to provide adequate dest's.

Reference(s):
. original qualys patch
0109-top-Protect-scat-from-buffer-overflows.patch
commit 9c745975b2

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:42:36 +10:00
Jim Warner
59f39da852 top: concede integer overflow risks in procs_refresh()
This is as far as we need go with respect to the issue
of integer overflow addressed in that reference below.

That patch, of course, was reversed to prepare for us.

Reference(s):
. original qualys patch
0105-top-Prevent-integer-overflows-in-procs_refresh.patch
commit 131e5e2fe6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:38:19 +10:00
Jim Warner
c9dfcdebdc top: Prevent integer overflows in procs_re... REVERTED
That patch referenced below is being reverted because:

. By design, no other top macro looks like a function.
Instead, they all contain some minimal capitalization.
The 'grow_by_size' macro stands out like a sore thumb.

. We would need to approach 400+ million tasks for for
the 1st addressed problem to produce integer overflow.

. And a 2nd check against SSIZE_MAX remains a mystery.

Me thinks a system on which top is running will suffer
ENOMEM before we need to worry about integer overflow.

Reference(s):
. original qualys patch
0105-top-Prevent-integer-overflows-in-procs_refresh.patch
commit 131e5e2fe6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:37:29 +10:00
Jim Warner
3b2235c266 top: check sortindx risk exposure (not treat symptoms)
Rather than validate the window's 'sortindx' each time
it was referenced (as was done in the patch below), we
now ensure the validity just once when the config file
is read. Thereafter, a running top will police bounds.

Reference(s):
. original qualys patch
0102-top-Check-sortindx.patch
commit d5b8ac7139

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:24:36 +10:00
Jim Warner
fb8cee585f top: Check sortindx. _________________________REVERTED
Here's yet another example of dealing with a potential
problem at the symptom level, instead of addressing it
at the source. So, we will reverse that original patch
referenced below in preparation for a proper solution.

[ at the least, this ugly code should have used that ]
[ existing MAXTBL macro, making it a little prettier ]

Reference(s):
. original qualys patch
0102-top-Check-sortindx.patch
commit d5b8ac7139

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:23:57 +10:00
Jim Warner
53e2654726 top: other graph_cpus, graph_mems, and summ_mscale fix
This patch replaces an original patch referenced below
which has now been reversed. We now validate variables
'graph_cpus', 'graph_mems' and 'summ_mscale' just once
at startup. Thereafter, top enforces the proper range.

[ we afford the same treatment to that 'task_mscale' ]
[ variable, which was ignored in the original patch. ]

Reference(s):
. original qualys patch
0099-top-Check-graph_cpus-graph_mems-and-summ_mscale.patch
commit cd8ba5670e

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:22:56 +10:00
Jim Warner
d1fbc5fbd4 top: Check graph_cpus, graph_mems, and sum... REVERTED
The variables graph_cpus, graph_mems & summ_mscale are
all well managed in a running top. They were, however,
each vulnerable to tampering via the rcfile. So rather
than continually addressing the symptoms, we'll attack
the root cause just once at startup in the next patch.

Reference(s):
. original qualys patch
0099-top-Check-graph_cpus-graph_mems-and-summ_mscale.patch
commit cd8ba5670e

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:19:35 +10:00
Jim Warner
e531c78140 top: Do not default to the cwd in configs_r... Tweaked
While it's only documented (so far) in commit text and
an occasional email I've tried to maintain some coding
standards primarily for reference/navigation purposes.
They also served, I felt, as useful mental challenges.

Someday I will get around to formerly documenting them
but in the meantime here are the ones for this commit:

. functions are grouped into logical (i hope) sections
. functions & sections are ordered to avoid prototypes
. function names are alphabetical within every section
. all functions & sections must be referenced in top.h

This patch just attempts to honor the above standards,
while also covering this new behavior in the man page.

[ please note that the net result of these 2 patches ]
[ is simply to avoid pathname truncations should our ]
[ limit of 1024 be exceeded. they do not have a role ]
[ in solving the 'local privilege escalation' issue. ]

[ and we can never prevent a user from setting their ]
[ HOME var to a directory writable by some attacker! ]

[ the only real protection for that CVE-2018-1122 is ]
[ those soon to be enhanced rcfile integrity checks, ]
[ achieved through several of the following patches. ]

Reference(s):
. original qualys patch
0097-top-Do-not-default-to-the-cwd-in-configs_read.patch
commit b45c4803dd

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-05-19 21:17:59 +10:00
Qualys Security Advisory
059ae8b512 top: Prevent out-of-bounds writes in PUFF().
This patch prevents three problems:

1/ Because snprintf() returns "the number of characters (excluding the
terminating null byte) which would have been written to the final string
if enough space had been available", _eol may point past the end of _str
and write out-of-bounds (in Batch mode).

2/ _eol is never checked against _str, so "while (*(--_eol) == ' ');"
may point _eol below _str and write out-of-bounds (in Batch mode).

3/ Sanity-check Pseudo_row to protect the strcpy().
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
ed8f6d9cc6 top: Fix out-of-bounds read/write in show_special().
This patch fixes two problems:

1/ In the switch case 0, if sub_end is at the very end of lin[], the two
null-byte writes are off-by-two (a stack-based buffer overflow). Replace
this end-of-string "emulation" with an equivalent test on ch (and then
goto/break out of the loop).

2/ "sub_end += 2" jumps over the null-byte terminator in lin[] if the
line contains a raw (without a tilde) \001-\010 character. Detect such a
null-byte terminator and goto/break out of the loop.

Note: in the case of a raw \001-\010 character, the character at
"sub_end + 1" is never processed (it is skipped/jumped over); this is
not a security problem anymore (since 2/ was fixed), so we decided not
to change this behavior, for backward-compatibility.
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
6b8b102cf2 top: Harden calibrate_fields().
- Make sure i is at least 1 before "i - 1" and "--i".

- Initialize endpflg (to 0, as it was originally, since it is static)
  before the "for" loop (the "break" may leave endpflg uninitialized,
  for example).
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
c424a64331 top: Prevent buffer overflow in calibrate_fields().
pflgsall[] can contain PFLAGSSIZ = 100 elements, each iteration of the
loop can write 3 elements to pflgsall[], and there are EU_MAXPFLGS = 58
iterations: a buffer overflow (it can be triggered via the configuration
file, for example, by filling "fieldscur" with the "sortindx" flag).
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
a71ac048e6 top: Impose a minimum on Screen_cols.
The safety of the critical function task_show() depends on the sanity of
Screen_cols. Just copy the tests on w_cols to Screen_cols (from the same
function adj_geometry()).
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
b4d068e624 top: Prevent integer overflow in adj_geometry(). 2018-05-19 07:33:15 +10:00
Qualys Security Advisory
23baeb1175 top: Limit Width_mode to SCREENMAX.
adj_geometry() limits to SCREENMAX too, but belt and suspenders, and
might as well tell the user about it.
2018-05-19 07:33:15 +10:00
Qualys Security Advisory
8ab8c1a469 top: Prevent integer overflows in config_file() and other_selection(). 2018-05-19 07:33:15 +10:00
Qualys Security Advisory
9c745975b2 top: Protect scat() from buffer overflows.
Several of these buffer overflows can actually be triggered (through the
configuration file for example): in config_file(), inspection_utility(),
and show_special().
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
0847390b83 top: Always exit from sig_abexit().
The default action for SIGURG is to ignore the signal, for example.
This is very similar to the patch "ps/display.c: Always exit from
signal_handler()."
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
7fc7062127 top: Initialize struct sigaction in before(). 2018-05-19 07:32:34 +10:00
Qualys Security Advisory
d69966962c top: Fix snprintf() call in capsmk().
Replace "snprintf(msg, sizeof(pmt)" with "snprintf(msg, sizeof(msg)".
Luckily sizeof(pmt) == sizeof(msg), but fix it anyway.
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
131e5e2fe6 top: Prevent integer overflows in procs_refresh().
This is very similar to our patch against integer overflows in
readproctab*().
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
b6be15d3cb top: Initialize cp in task_show().
Found no problematic case at the moment, but this is a cheap
just-in-case.
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
713381b10d top: Protect macro parameters. 2018-05-19 07:32:34 +10:00
Qualys Security Advisory
d5b8ac7139 top: Check sortindx.
Every time sortindx is used as an index, or loaded from the
configuration file. Otherwise it leads to out-of-bounds reads and
arbitrary code execution.
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
bbe58d7e0a top: Check width and col.
Otherwise they may lead to out-of-bounds writes (snprintf() returns the
number of characters which would have been written if enough space had
been available).

Also, make sure buf is null-terminated after COLPLUSCH has been written.
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
97a989cbcd top: Check Rc.fixed_widest.
Otherwise it leads to crashes (for example, setting it to 2147483600 in
the configuration file segfaults top).
2018-05-19 07:32:34 +10:00
Qualys Security Advisory
cd8ba5670e top: Check graph_cpus, graph_mems, and summ_mscale.
Otherwise they lead to out-of-bounds reads and format-string bugs.

Since these variables are set/written to in several places (for example,
config_file()), check them in the only place where they are read/used.

Also, constify the static gtab[]s.
2018-05-19 07:32:22 +10:00
Qualys Security Advisory
bd91bbf7f1 top: Check i when setting Curwin in config_file().
Otherwise it leads to out-of-bounds reads (and maybe writes).
2018-05-19 07:32:22 +10:00
Qualys Security Advisory
b45c4803dd top: Do not default to the cwd in configs_read().
If the HOME environment variable is not set, or not absolute, use the
home directory returned by getpwuid(getuid()), if set and absolute
(instead of the cwd "."); otherwise, set p_home to NULL.

To keep the changes to a minimum, we rely on POSIX, which requires that
fopen() fails with ENOENT if the pathname (Rc_name) is an empty string.
This integrates well into the existing code, and makes write_rcfile()
work without a change.

Also, it makes the code in configs_read() easier to follow: only set and
use p_home if safe, and only set Rc_name if safe (in all the other cases
it is the empty string, and the fopen() calls fail). Plus, check for
snprintf() truncation (and if it happens, reset Rc_name to the empty
string).

Important note: top.1 should probably be updated, since it mentions the
fallback to the current working directory.
2018-05-19 07:32:22 +10:00
Qualys Security Advisory
e877d4f4c4 top: Fix double-fclose() in configs_read().
It happens only if RCFILE_NOERR is defined (it is not, by default).
2018-05-19 07:32:22 +10:00
Jim Warner
029a463172 top: show that truncation indicator ('+') consistently
With a little luck, this should be the final tweak for
our support of extra wide characters. Currently, those
characters don't always display the '+' indicator when
they've been truncated. Now, it should always be seen.

[ plus it's done a tad more efficiently via snprintf ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-03-03 17:52:43 +11:00
Jim Warner
0d352aa3d9 top: update copyright dates in source and man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
dddb8e1751 top: try to avoid premature truncation indicator ('+')
Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
4e77b307dc top: avoid potential truncation with 'Inspect' feature
As it turns out, that Ukrainian 'demo' text supporting
the '=' command was 152 bytes long, up from an English
version of 80 bytes. Unfortunately, the buffer used to
format all such strings was insufficient at 128 bytes.

Depending on the width of one's terminal, some strange
result could be experienced when a multi-byte sequence
was truncated. So, this just makes that buffer bigger.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
f3f90ab93c top: allow translated field headers to determine width
After wrestling with extra wide characters, supporting
languages like zh_CN, sometimes default/minimum column
widths might force a truncation of translated headers.

So, this commit explores one way that such truncations
could be avoided. It is designed so as to have minimal
impact on existing code, ultimately affecting just one
function. But it's off by default via its own #define.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
3b53aba319 top: an efficiency tweak to extra wide character logic
When I recently added extra wide character support for
locales like zh_CN, I didn't worry about some overhead
associated with the new calls to 'mbtowc' & 'wcwidth'.
That's because such overhead was usually incurred with
user interactions, not a normal iterative top display.

There was, however, one area where this overhead would
impact the normal iterative top mode - that's with the
Summary display. So I peeked at the glibc source code.

As it turns out, the costs of executing those 'mbtowc'
and 'wcwidth' functions were not at all insignificant.
So, this patch will avoid them in the vast majority of
instances, while still enabling extra wide characters.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
2167dcbccb top: standardize width of the %CPU & %MEM columns at 5
There is (should be) no justification for changing the
width of the percentage columns (%CPU, %MEM) depending
on the BOOST_PERCNT #define. So this patch will ensure
that both columns are fixed at their former maximum 5.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-19 20:37:24 +11:00
Jim Warner
c888534a4e top: account for the idle state ('I') threads in total
With the documentation update in the commit referenced
below, we should also account for such threads as they
will already be represented in the task/thread totals.

[ and do it in a way that might avoid future changes ]

Reference(s):
commit a238a687ce

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-12 20:53:57 +11:00
Jim Warner
b4bce3b8fa top: adapt utf8 logic to support extra wide characters
Back when top was refactored to support UTF-8 encoding
it was acknowledged that languages like zh_CN were not
supported. That was because a single 'character' might
require more than a single 'column' when it's printed.

Well I've now figured out how to accommodate languages
like that. My adaptation is represented in this patch.

[ and just in case someone wishes to avoid the extra ]
[ runtime costs, a #define OFF_XTRAWIDE is included. ]

Along the way, I've cleaned up some miscellaneous code
supporting the 'Inspect' feature so that the rightmost
screen column was always used rather than being blank.

[ interestingly, my xterm & urxvt terminal emulators ]
[ are able to split extra wide characters then print ]
[ 1/2 of such graphics in the last column. the gnome ]
[ terminal emulator does not duplicate such behavior ]
[ but prints 1 extra character in same width window. ]

Reference(s):
. Sep, 2017 - original utf8 support
commit 7ef38420a4

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-12 20:53:56 +11:00
Jim Warner
dfa118b4d5 top: tweak that recent enhancement to startup defaults
When the new approach for startup defaults was adopted
in the reference below, a file might be left open that
technically should be closed. This situation arises in
the unlikely event the #define RCFILE_NOERR is active.

Without that #define, the program will exit early thus
rendering the open file issue moot. However, even with
that #define there was no real harm with an open file.
It simply meant a 2nd FILE struct would have been used
when, or if, the rcfile was written via a 'W' command.

Anyway, this patch ensures such a file will be closed.

Reference(s):
. Dec, 2017 - /etc/topdefaultrc introduced
commit 3e6a208ae5

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-12 20:53:56 +11:00
Craig Small
a238a687ce docs: Document I idle state in ps and top
Linux 4.2 provided a new process state of I which is used for an idle
kernel thread. This new state means that kernel threads do not
contribute to the loadavg as they are no longer state D or S but I.

While both ps and top displayed this state, it wasn't documented in
either manual page until now.

References:
 https://bugs.debian.org/886967
 https://www.quora.com/What-does-mean-Linux-process-state-I-in-the-top-output
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=80ed87c8a9ca0cad7ca66cf3bbdfb17559a66dcf
2018-01-13 11:18:09 +11:00
Jim Warner
3e6a208ae5 top: allow more flexible approach for startup defaults
Those references below offer more detail regarding the
default startup changes beginning with version 3.3.10.

It is important to remember that all such changes were
supposed to impact only new users or users who had not
saved the personal config file (via that 'W' command).
However, I introduced a bug wherein the rcfile was not
fully honored. This gave the changes a bad reputation.

That bug was corrected in release 3.3.11 but the issue
of default startup options keeps resurfacing. And it's
clear there's no consensus on what should be included.

Our --disable-modern-top configure option is of little
help since it remains an all-or-nothing approach. What
we need is an answer offering unlimited customization.
So, this commit will provide distribution packagers or
system administrators with a much more flexible way to
set their own preferred startup default configuration.

A new rcfile is being introduced: '/etc/topdefaultrc',
whose format/content is the same as a personal rcfile.
Thus once a 'proper' enterprise configuration has been
established and saved via 'W', it can be copied to the
/etc/ directory. Thereafter, startup in the absence of
a saved rcfile will use that configuration as default.

Now if a distribution packager or system administrator
wishes to expose their users to some of top's advanced
capabilities they can do so gradually. Perhaps setting
up graph mode for summary area task and memory display
while retaining the %CPU sort could be tried. Or maybe
showing colors, but better customized for a particular
terminal emulator. Such possibilities are now endless.

[ in exploiting this new capability, i hope that the ]
[ other windows (alt display mode) aren't overlooked ]

Reference(s):
. Sep, 2014 - Not fully honoring rcfile bug discussed
https://www.freelists.org/post/procps/top-saved-rcfile-bug
. Oct, 2014 - Attempt to defend new startup defaults
https://bugzilla.redhat.com/show_bug.cgi?id=1153049
. Jul, 2015 - Forest vs. %CPU views discussion
https://gitlab.com/procps-ng/procps/issues/6
. Oct, 2017 - Question the use of --disable-modern-top
https://bugzilla.redhat.com/show_bug.cgi?id=1499410
. Oct, 2017 - Forest vs. %CPU views discussion again
https://www.freelists.org/post/procps/Forest-mode-by-default-in-top-seems-a-bit-strange
. Dec, 2017 - Rehash of 3.3.10 startup defaults change
https://gitlab.com/procps-ng/procps/issues/78

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-23 17:41:37 +11:00
Jim Warner
cdf8eac99e top: miscellaneous changes to whitespace/comments only
[ ok, there's also 1 newly added #undef included too ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-23 17:41:37 +11:00
Jim Warner
18e5aecd2b top: exploit msg handler override to avoid corrupt tty
Way back in November of 2011, the library was equipped
with an overridable error message handler function. It
was done expressly for a program like top which alters
the tty. But that support was withdrawn shortly after.

This was all done in the lead up to v3.3.2. That's the
release where NLS support was added and it represented
a hectic time. In hindsight, the changes went too far.

So this commit, in a minimal fashion, restores ability
to address a potential fatal library error. After all,
any properly behaving library would never unilaterally
subject a caller to a stderr message and then an exit.

[ when exposing 1 variable in libprocps.sym, 2 other ]
[ existing symbols were repositioned alphabetically. ]

Reference(s):
. generalized library memory provisions
commit 7126cc4491
. top exploit library memory provisions
commit 88087ec5a5
. library xalloc type functions made private
commit 2865ded64e
. restored prior top memory logic
commit 05f5deb97c

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:44 +11:00
Jim Warner
0a91e21d3a top: add and/or expand a couple more translation hints
After noticing that the 'uk' translation expanded what
was supposed to be a 3 line header into 5 lines, seems
appropriate to offer more guidance on max lines count.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:35 +11:00
Jim Warner
4e2a1ba9b1 top: stop neglecting potential utf8 field descriptions
And I thought those strange characters I saw with only
certain translations in Fields Management descriptions
were resulting from my terminal emulator deficiencies.

Turns out that ol' top wasn't addressing possibilities
of such descriptions ending with multi-byte sequences.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
1ba0e999c6 top: eliminate that potential vulnerability for TOCTOU
Initially, I was going to ignore that coverity warning
CID #177876. But, since top may be running SETUID it's
best if it can be avoided instead. The fix was simple.

We'll trade the access() call for a real fopen() call.
This time-of-check-time-of-use warning should go away.
------------------------------------------------------

When XDG support was originally introduced in top, the
author made a poor choice in access(). A real question
that needed asking was 'does the file exist'. However,
the question that was asked was 'can this real user ID
or this real group ID access the file'. Then, when the
fopen() is finally issued, top would use the effective
user ID or the effective group ID to access that file.

That's what opened the potential TOCTOU vulnerability,
which was important only if top was running SUID/SGID.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
0f5d503103 top: make 'utf8_justify' independent of non-utf8 logic
By eliminating the call to 'fmtmk', the 'utf8_justify'
function could more easily be used in libproc someday.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
ac76afee36 top: utf8 utils should observe indentation conventions
Gosh, all this time we used indents of 4 spaces, not 3
spaces which were always the top standard indentation.

[ and we made our 'utf8_embody' a little more robust ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
fba7a919fb top: ensure bug report suggestion agrees with man page
The top man page was changed back on 10/20/15, in that
commit shown below. There, freelists.org was suggested
as the bug reports recipient. But, the program was not
changed from the original Debian bug reports approach.

Reference(s):
commit b1f7b2a509

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
f762cd5660 top: make the 'utf8_proper_col' routine more efficient
This patch better exploits short-circuit evaluation in
two 'if' tests. In every case, the 1st of 2 conditions
in each 'if' test must take place but it always proves
true with each iteration for 1 of the 'if' statements.
Thus, the 2nd condition will have to be evaluated too.

By reordering 2 tests in each 'if', we can ensure that
the 2nd condition will then be tested much less often.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
abde5d7d5e top: make that 'make_str_utf8' function more efficient
Upon reflection, there was absolutely no justification
for that call to strlen() which was then followed by a
call to snprintf(). The latter provides this needed #.

[ also make that 'delta' value a little more visible ]
[ instead of hiding it at the end of a its code line ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
6597ac227d top: ensured one translation hint agrees with template
Now that top can properly handle translated multi-byte
strings I've been reviewing translated efforts so far,
and weighing output against related translation hints.

In one case, a translation hint has not kept pace with
the current program state. In addition, that same hint
could be expanded to suggest translation alternatives.

[ frankly I never expected the translators to tackle ]
[ some of those 'special' strings. the task appeared ]
[ just too daunting. but they have done a great job! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
18958c507e top: improve the translator hint regarding field width
Reference(s):
https://www.freelists.org/post/procps/Does-COMMAND-really-have-to-be-at-most-7-characters,2

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
f6ee2c0085 top: correct an insidious occasional truncation buglet
With the help of our Swedish translator, hopefully the
final buglet has now been vanquished in the multi-byte
translation support. This one was a real nasty bugger.

Although it didn't occur with every terminal emulator,
occasionally random text lines were being chopped off.

As it turns out, those terminals were blameless. There
were two separate places in top's show_special routine
where potential multi-byte sequences were inadequately
addressed. Solution: exploit existing utf-8 functions.

[ it also became apparent that the translation hints ]
[ in the top_nls module were deficient. so a special ]
[ caution was added regarding the final line of txt. ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-02 22:20:58 +11:00
Jim Warner
d5a9965cde top: plug a small potential hole in multi-byte support
Unlike the insp_mkrow_raw function the insp_mkrow_utf8
routine is not equipped to print non-ctl, non-printing
characters like '<7f>'. However, technically that very
value currently slips through the cracks. So with this
patch top will now print a space in the unlikely event
a character with the value of 127 is ever encountered.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-02 22:20:58 +11:00
Jim Warner
cd88d4538b top: extend utf-8 multi-byte support to users & groups
Since all the necessary utf-8 plumbing is now in place
this commit will extend multi-byte support to user and
group names. Now top will be on a par with the ps guy.

[ plus, it's also my way of showing appreciation for ]
[ all those investments silently made by translators ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:30:16 +11:00
Jim Warner
d002bdc455 top: some minor tweaks to the utf-8 multi-byte support
Translatable column headers are supposed to be limited
to no more than 7 characters, even though some columns
are wider than that or even variable width. That value
of 7 is dictated by the Fields Management screen which
will otherwise truncate a column header longer than 7.

Our new utf-8 support did not adequately deal with the
potential need for truncation of column headers should
that limit of 7 be exceeded. This patch corrects that.

[ a few comments were also tweaked just a little bit ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:30:16 +11:00
Jim Warner
fad0c62076 top: extend multi-byte support to 'Inspection' feature
The previous commit implemented multi-byte support for
the basic top user interaction and display provisions.
This commit completes multi-byte support by addressing
that 'Inspect Other Output' feature (the 'Y' command).

Few people probably exploit this very powerful feature
which allows the perusing of any file or piped output.
And even if nobody uses 'Y', someone will stumble over
it on the help screen and try it out. Assuming top was
not built with INSP_OFFDEMO defined, they'll end up on
the screen our translators have faithfully translated.

Without this patch, such a screen would display with a
bunch of 'unprintable' characters which will then show
in the standard (less-like) way as: '^A', '<C3>', etc.
In other words, those poor screens will be a big mess!

[ this program can even display an executable binary ]
[ while at that same time supporting Find/Find Next. ]
[ imagine, a file with no guarantee of real strings! ]
[ just try a Find using less with such binary files. ]

With this commit, the translated 'Y' demo screens will
now be properly shown, providing no invalid multi-byte
characters have been detected. Should that be the case
then they'll be displayed in that less-like way above.

And, if users go on to fully exploit this 'Y' command,
there is a good chance that a file or pipe might yield
output in a utf-8 multi-byte form. Should that be true
such output will thus be handled appropriately by top.

[ in many respects, this change was more challenging ]
[ than the basic support within the previous commit. ]
[ story of my life: least used = most effort needed. ]

Many thanks to our procps-ng translators which enabled
a proper test of these changed 'Y' command provisions:
. Vietnamese: Trần Ngọc Quân
. Polish: Jakub Bogusz
. German: Mario Blättermann
. French: Frédéric Marchal, Stéphane Aulery

[ and my sincerest apologies too, for my negligence! ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
7ef38420a4 top: refactored for correct multi-byte string handling
When this project first began implementing translation
support nearly 6 years ago, we overcame many 'gettext'
obstacles and limitations.  And, of course, there were
not any actual translations at the time so our testing
was quite limited plus, in many cases, only simulated.

None of that, however, can justify or excuse the total
lack of attention to top's approach to NLS, especially
since some actual translations have existed for years.

When the issue referenced below was raised, I suffered
immediate feelings of anxiety, doubt and pending doom.
This was mostly because top strives to avoid line wrap
at all costs and that did not bode well for multi-byte
translated strings, using several bytes per character.

I was also concerned over possible performance impact,
assuming it was even possible to properly handle utf8.

But, after wrestling with the problem for several days
those initial feelings have now been replaced by guilt
over any trouble I initially caused those translators.

One can only imagine how frustrating it must have been
after the translation effort to then see top display a
misaligned column header and fields management page or
truncated screens like those of help or color mapping.
------------------------------------------------------

Ok, with that off my chest let's review these changes,
now that top properly handles UTF8 multi-byte strings.

. Performance - virtually all of this newly added cost
for multi-byte support is incurred during interactions
with the user. So, performance is not really an issue.

The one occasion when performance is impacted is found
during 'summary_show()' processing, due to an addition
of one new call to 'utf8_delta()' in 'show_special()'.

. Extra Wide Characters - I have not yet and may never
figure out a way to support languages like zh_CN where
the characters can be wider than most other languages.

. Translated User Name - at some future point we could
implement translation of user names. But as the author
of the issue acknowledged such names are non-standard.
Thus task display still incurs no new multi-byte costs
beyond those already incurred in that escape.c module.

For raising the issue I extend my sincerest thanks to:
Göran Uddeborg

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
01fb8d5a78 top: correct a minor instance of wrong NLS macro usage
The 'N_fmt' and 'N_txt' macros are interchangeable and
just highlight the 2 str types found in Norm_nlstable.

The change in this patch (strictly cosmetic) was found
during the coding for what will be the next 2 commits.
It has not been squashed into either of those so as to
not muddy up the waters for what was a major refactor.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
a2ceb95e2a top: protect against the anomalous 'Mem' graph display
Until this patch, top falsely assumed that there would
always be some (small) amount of physical memory after
subtracting 'used' and 'available' from the total. But
as the issue referenced below attests, a sum of 'used'
and 'available' might exceed that total memory amount.

I'm not sure if this is a problem with our calculation
of the 'used' amount, a flaw in the kernel 'available'
algorithms or some other reason I cannot even imagine.

Anyway, this patch protects against such a contingency
through the following single line addition of new code
. if (pct_used + pct_misc > 100.0 || pct_misc < 0) ...

The check for less than zero is not actually necessary
as long as the source numbers remain unsigned. However
should they ever become signed, we'll have protection.

[ Most of the changes in this commit simply separate ]
[ a variable's definition from its associated logic. ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/64

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-08-19 20:55:46 +10:00
Jim Warner
e3c729adfa top: address a Debian wishlist NLS man page suggestion
Reference(s):
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=865689

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-08-19 20:55:46 +10:00
Jan Rybar
d9c4b6b011 top: refresh interval accepts non-locale decimal value
For the past 3 years top has fully honored that locale
LC_NUMERIC setting which impacts his refresh interval.
For the past nearly 5 years top has saved that refresh
value in a locale independent form in his config file.

With this commit we'll intentionally break top so that
a comma or period will be accepted for the radix point
regardless of what that LC_NUMERIC may have suggested.

The current locale LC_NUMERIC will, however, determine
how the delay interval is displayed in the 'd' prompt.

[ This position is better than the approach employed ]
[ by those coreutils 'sleep' and 'timeout' programs. ]
[ Both claim to permit floating point arguments. But ]
[ neither one will accept the comma separator should ]
[ the locale be a country that in fact uses a comma. ]

Reference(s):
https://gitlab.com/procps-ng/procps/merge_requests/50

Prototyped by: Jan Rybar <jrybar@redhat.com>
Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-08-14 22:13:28 +10:00
Jim Warner
ac76e4db2c top: fixing command line parsing errors is now a habit
Ok, I admit it. I'm now tired of cleaning up after me.

This is the 3rd related tweak after that '-1' argument
was originally introduced. And with this patch we will
once again properly honor the '-o' and '-u|U' switches
without a need to be followed by an additional switch.

[ one can follow my unfortunate trail of alterations ]
[ beginning with my most recent fix referenced below ]

Reference(s):
commit 4b44aebd80

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-07-04 20:29:26 +10:00
Jim Warner
0998225651 top: ensure necessary proc_t support if '-U' filtering
While the effective user id would always be present in
each proc_t, thus supporting 'u' filtering, other user
ids would only be present if /proc/$$/status was read.

This commit just puts the 'master' branch top on a par
with the 'newlib' branch when user filtering with 'U'.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-07-04 20:29:25 +10:00
Jim Warner
4b44aebd80 top: correct functioning of the '-p' command line args
With the introduction of a new '1' command line toggle
I have gone and broken a provision of the '-p' command
line switch (pids monitoring). Multiple pids could not
be specified through the use of comma delimited lists.

Thus, this commit simply corrects that newly added bug
which was born in the 'adjustment' commit shown below.

Reference(s):
. adjustment to '-1' implementation
commit 909b37d755

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-06-04 21:28:39 +10:00
Jim Warner
c409f5a433 top: address the argument parsing quirk involving '-h'
There exists the possibility that a 'putp' call can be
issued before the 'setupterm' invocation has occurred,
as is reflected in a bugzilla report referenced below.

Strangely, such a SEGV isn't always triggered as logic
would suggest it ought to be. I experienced a fault in
these environments with the associated curses version:
. archlinux, procps-ng 3.3.12, ncurses 6.0.20170429
. fedora-25, procps-ng 3.3.10, ncurses 6.0.20160709
. opensuse-42.2, procps-ng 3.3.9, ncurses 5.9.20140201
. gentoo, procps-ng 3.3.12, ncurses 6.0.20150808
. slackw-14.2, procps-ng 3.3.12, ncurses 6.0.20160910

Whereas under these environments there was no problem:
. ubuntu-17.04, procps-ng 3.3.12, ncurses 6.0.20160625
. debian-test, procps-ng 3.3.12, ncurses 6.0.20161126
. mageia-5.1, procps-ng 3.3.9, ncurses 5.9.20140323

[ as an aside, the expected result in the bug report ]
[ is incorrect and should mention the '1' parameter. ]

[ however, until release 3.3.13 when the '1' becomes ]
[ a valid switch, numbers are not detected when used ]
[ with any switch which doesn't require an argument. ]

[ you're welcome to treat that as a separate bugglet ]

Reference(s):
https://bugzilla.redhat.com/show_bug.cgi?id=1450429

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-05-22 21:34:38 +10:00
Jim Warner
1422c219ac top: now includes that NUMA node field display support
[ this patch has been adapted from the newlib branch ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/58

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-05-22 21:34:32 +10:00
Jim Warner
f6f859c8f3 top: correct man page alphabetical order for -E switch
Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-05-22 21:34:32 +10:00
Jim Warner
56d79b9d13 top: provide more accurate cpu usage stats for startup
The top program already incorporated a modest delay at
startup so that some minimal process cpu history could
be established. However, Summary Area system level cpu
statistic history reflected usage since boot. As such,
unchanging % values would be shown with every restart.

This commit just adopts the same approach used in task
%CPU history for the Summary Area statistics. In other
words, it introduces a 'priming read' at startup as is
found in the newlib implementation for the <stat> API.

Reference(s):
https://gitlab.com/procps-ng/procps/merge_requests/42

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-29 22:07:44 +11:00
Jim Warner
909b37d755 top: make command line switch parsing even more robust
This program has always tried to maintain an extermely
robust command line parsing procedure, far more robust
that what's available with the getopt stuff. But, with
the introduction of our first numeric switch it should
have been made even more robust than, in fact, it was.

This commit will now accomplish such a desirable goal.

Reference(s):
. added '1' command line switch
commit 89db82d143

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-29 22:07:44 +11:00
Jim Warner
90ac0dabf5 top: just update all of the copyright dates in sources
Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Jim Warner
fc5f5a93ba top: by default, show cmd line vs. cmd name at startup
All of top's display was designed to fit into an 80x24
terminal. This includes the help screens plus both the
Summary and Task Areas, assuming no saved config file.

With release 3.3.10, the startup defaults were changed
assuming ./configure --disable-modern-top wasn't used.
This was done in the hope of introducing some users to
unknown capabilities such as colors, forest view, etc.

The purpose of this commit is to coax a few more users
into possibly exploring another capability: scrolling.
We do so by tweaking the default startup display so as
to show full command lines. Now, when things no longer
fit in 80x24, horizontal scrolling might be exploited.

[ of course, this can be reversed with the -c switch ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Jim Warner
89db82d143 top: provide -1 command line switch as 'Cpu(s)' toggle
If built without ./configure --disable-modern-top, the
program displays each cpu individually providing there
is sufficient vertical screen real estate. For massive
SMP environments this will necessitate use of a config
file where the cpu summary toggle ('1') could be saved
via the 'W' command. But, an rcfile may not be viable.

So this commit introduces a '1' command line switch to
emulate exactly the effects of the interactive toggle.

And since it is our first numeric switch some existing
parsing logic had to be changed slightly. Such changes
are, in truth, an improvement. For example, instead of
seeing "inappropriate '2'" with ./top -2 we'll now see
the vastly more appropriate error "unknown option '2'.

References(s):
https://gitlab.com/procps-ng/procps/issues/55

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Jim Warner
fb48b5d9fb top: provide -E command line switch for memory scaling
In their 3.2.7 version of top, Redhat introduced an -M
switch to automatically scale Summary Area memory data
to avoid truncation (and the resulting '+' indicator).

The procps-ng top does not employ suffixes with memory
data nor does it allow for different scaling with each
separate value. Rather, scaling appears at line start.

If built without ./configure --disable-modern-top, the
Summary Area memory will be scaled at GiB which should
lessen chance of truncation. Otherwise KiB was used to
reflect such memory, increasing the truncation chance.

And while 'W' can be used to preserve some appropriate
scaling value, there are arguments against such rcfile
approaches as cited in the issue and bug report below.

So this commit will bump the Summary Area memory scale
factor from KiB to MiB when using --disable-modern-top
as a concession to that Redhat bug report noted below.

And it also introduces a new command line switch which
can force any desired scaling regardless of the rcfile
or which ./configure option might have been specified.

[ for top's help text we'll show 'E' as if it were a ]
[ switch without arguments in order to keep the help ]
[ text displayable without wrap in an 80x24 terminal ]

[ the man page, however, will show all k-e arguments ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/53
https://bugzilla.redhat.com/show_bug.cgi?id=1034466

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Jim Warner
fe6e03d8a9 top: show fewer decimal places for memory (by default)
After much reflection I've come to the conclusion that
displaying 3 decimal places (usually) when memory data
had been scaled is no longer optimal with today's ever
increasing amounts. And given that not all task memory
fields are the same widths, inconsistencies can easily
arise as illustrated and discussed in the issue below.

Instead of unilaterally reducing the number of decimal
places, this commit will sneak in such a change via an
existing configure option that was very likely unused.

The former 'disable-wide-memory' option has now become
'enable-wide-memory', which can be used if the current
behavior (3 decimal places) is preferred. Without that
option, whenever memory is scaled beyond KiB, just one
decimal place will be shown in Summary and Task areas.

And Task area field width will no longer be changed by
this revised configure option. Instead, all such field
widths will now be fixed at the former maximum values.

Reference(s):
https://gitlab.com/procps-ng/procps/issues/50

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Jim Warner
ddcdba18b7 top: correct alphabetic ordering with some enumerators
Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-03-16 21:59:53 +11:00
Earnestly
af53e170b9 top: Add unobtrusive XDG support
By default the file HOME/.toprc will be prefered.  This ensures there
should be minimal breakage even if this file is later created by some
other means.  Otherwise we will follow the new behaviour described by
the XDG Base Directory Specification:

If the XDG_CONFIG_HOME environment variable is available we will attempt
to use this as XDG_CONFIG_HOME/procps/toprc otherwise we will fall-back
to HOME/.config/procps/toprc instead.

Signed-off-by: Earnestly <zibeon@gmail.com>
2017-01-17 23:47:40 +00:00
Jim Warner
398b83f40f top: make for consistent & enhanced cpu % calculations
That issue cited below prompted some changes under the
newlib branch to standardize the calculation involving
busy, idle, user & system accumulated plus delta tics.

This patch will bring our master branch version of top
into agreement with that newlib version which exploits
some of those newly added library extended provisions.

Reference(s):
https://gitlab.com/procps-ng/procps/issues/48

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-01-04 08:14:42 +11:00
Jim Warner
5c78e785ee top: accumulated misc tweaks to code/comments/man page
Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-12-07 21:50:52 +11:00
Jim Warner
c6407ef125 top: make that 'forest view' just a tad more efficient
It makes no sense to begin our tracked nested level at
'1' then later require a '1' to be subtracted from the
level as artwork and indentation is added for display.

By beginning such tracked levels at zero, we can avoid
the need to adjust it & use it directly in a snprintf.

[ this commit parallels a patch in our newlib branch ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-10-16 08:18:31 +11:00
Jim Warner
98ed114c26 top: just some minor tweaks to the man document (only)
This patch just parallels some adjustments/corrections
which were also implemented under the 'newlib' branch.

[ remaining differences between man documents relate ]
[ to old kernels with topic '2b. TASK and CPU State' ]
[ and a note in '4c. SORTING' for TTY + WCHAN fields ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-10-09 21:34:05 +11:00
Jim Warner
18b1a887b7 top: finally circumvent that minor libnuma memory leak
Still unhappy with a minor memory leak associated with
libnuma, I experimented with omitting the dlclose that
was issued at module's end. For some reason which will
remain a mystery, the valgrind leak then went bye-bye.

So this patch just omits one use of dlclose and relies
on whatever kernel magic is at work to free the memory
when each process ends. We kept, however, the original
code (now commented-out) to serve as a future caution.

There remains one potential (but unlikely) dlclose use
near the original dlopen. But there will be no leak as
that 'numa_node_of_cpu' will not yet have been called.
This seems to be the culprit that triggers such leaks.

None of this libnuma shit would likely have come close
to hitting our fan had the numa developers provided us
with 'new' and 'unref' functions like our newlib does.

[ this commit parallels a patch in our newlib branch ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-09-18 20:39:12 +10:00
Jim Warner
5313852596 top: avoid yet more overhead of accessing /proc/status
After discovering those terrible costs associated with
/proc/status vs. /proc/stat, the build_header function
changed to favor the latter for a field found in both.

Well, low-and-behold, this top program still used some
flags that needlessly caused 'status' to still be read
when 'statm' could have served. And, while top's needs
require conversion from pages to KiB, that's still far
less costly than reading that gosh darn 'status' file.

[ this patch parallels similar changes to newlib top ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-08-23 21:12:32 +10:00
Jim Warner
7df87ea7cf top: when setting library flags favor stat over status
Long ago, in a galaxy far away, top was convinced that
/proc/stat was to be favored over /proc/status if some
field could be satisfied with either. This was done to
avoid extra costs of 64-bit math for 32-bit platforms.

Well, its time to acknowledge the prevalence of 64-bit
platforms. And in such an environment there is a large
hidden cost currently if using status instead of stat.
In fact, that cost difference can be as high as 1400%.

So, this commit will coax top into favoring that least
costly route while also fixing an EU_TGD library flag.

[ this patch parallels similar changes to newlib top ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-08-23 21:12:32 +10:00
Jim Warner
b4fdb27a05 top: provide for expanded potential displayable fields
This commit provides for raising the total displayable
fields from its current 70 to 86. It also bumps the id
in an rcfile representing the version from 'i' to 'j'.

The increase in number of fields will make sharing the
rcfile with an older top, once it's saved, impossible.

These changes are being done via a #define rather than
hard coded so any such sharing will still be possible.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-08-01 20:11:11 +10:00
Jim Warner
63f8c16fa4 top: make compilation possible under netbsd-curses too
Whoa, I had never considered an alternative to ncurses
until the issue referenced below was raised. Thus, I'm
surprised to find that 'tparm' was the only impediment
to ultimately utilizing this alternate curses library.

And, while we could have substituted that non-standard
'tiparm' with only 2 arguments, we'll utilize the full
parms compliment in the spirit of that original patch.

Frankly, the task of developing an alternative library
to that ncurses implementation really boggles my mind.

Congratulations to rofl0r, whoever that masked man is.

Reference(s):
. issue raised
https://gitlab.com/procps-ng/procps/issues/38
. netbsd-curses home
https://github.com/sabotage-linux/netbsd-curses

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-17 08:52:50 +10:00
Jim Warner
eca9168617 misc: adapted others to that new proc_t 'cgname' field
This patch adapts the ps program to a newly add proc_t
field and provides for new support in that top program
along with his man document (ps was already ok there).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
c15aea9d08 top: eliminate 2 author sections from the man document
We'll follow Craig's lead and whack some author stuff.

[ and we'll honor the SEE ALSO guideline for periods ]
[ but essentially ignore all the other busybody crap ]
[ which, to be honest, we pretty much follow already ]

[ actually, if you're told to follow a certain style ]
[ in program examples, you've gone way past busybody ]
[ crap and have entered the realm of anal retentive! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
5e33325f9a top: improved that #define PRETENDNOCAP implementation
This development (only) define can be used to turn top
into a simple text program, disabling termcap effects.
But input (at screen bottom) suffers from a line wrap.

So, this commit just makes the input prompt processing
a little more effective by adding one leading newline.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-07-06 21:33:17 +10:00
Jim Warner
29079d35e5 top: accommodate the loss of that OOMEM_ENABLE #define
Now that the conditional OOMEM_ENABLE has been removed
and all users exposed to those 'out of memory' fields,
it's about time we added them to the top man document.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
10503c03d4 top: make more responsive when toggling cpu off/online
Using the <STAT> api under the newlib branch, that top
program is very responsive to changes in the number of
on-line cpus. However under the master branch this top
program is very responsive only to losses of some cpu.

When a cpu is brought back on-line potential delays of
60 seconds could be encountered. That delay was simply
an attempt to reduce costs and reflected the erroneous
assumption that adding a cpu required physical effort.

So without redesigning the cpu refresh code to emulate
that of newlib, this commit just reduces the potential
delay to 3 seconds (the same that is used for memory).

[ As an aside, if one wants to have their confidence ]
[ in that htop program badly shaken, try taking some ]
[ cpus off-line & on-line again while it is running. ]

[ Poor ol' htop just continues to report results for ]
[ whatever were the cpus when started. Nice feature, ]
[ but I wonder where those phantom results are from. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
ac8f49e79e top: miscellaneous accumulated tweaks of code/comments
This commit just tries to parallel that newlib branch.
It contains the following changes, which were prompted
by the newlib coverity analysis which Craig initiated:

. comment typo predicting 'String not null terminated'
. eliminate 'Logically dead code' from insp_make_row()

Some tweaks, unrelated to coverity, are also included:

. use more modern (recommended) approach for time call

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
5e26512980 top: extend 'zero suppression' scope to several fields
This commit just tries to parallel the implementations
in the newlib branch. The config file Rc.zero_suppress
will be extended to include both out-of-memory fields.

And while we're at it, we'll also extend zero suppress
to that NI (nice value) field, which already should've
had it. Plus we trade those namespaces custom suppress
logic for our now slightly enhanced make_num function.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
5892540819 top: man page now includes resident memory enhancement
Since support already exists in the newlib branch this
represents an equivalent master branch implementation,
and this commit message is shared with 2 more patches.

Beginning with linux-4.5, the following new fields are
being added under that /proc/<pid>/status pseudo file:
 . RssAnon - size of resident anonymous memory
 . RssFile - size of resident file mappings
 . RssShmem - size of resident shared memory

p.s. Locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.

p.p.s. Archlinux, Debian-stretch and Fedora-23 already
are currently using a 4.5 linux kernel (as of 6/2/16).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
6306050a65 top: exploit new linux-4.5 resident memory enhancement
Since support already exists in the newlib branch this
represents an equivalent master branch implementation,
and this commit message is shared with 2 more patches.

Beginning with linux-4.5, the following new fields are
being added under that /proc/<pid>/status pseudo file:
 . RssAnon - size of resident anonymous memory
 . RssFile - size of resident file mappings
 . RssShmem - size of resident shared memory

p.s. Locked resident memory support was also added but
isn't directly related to the kernel 4.5 enhancements.

p.p.s. Archlinux, Debian-stretch and Fedora-23 already
are currently using a 4.5 linux kernel (as of 6/2/16).

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-06-07 20:49:30 +10:00
Jim Warner
dad56cc954 top: minimal necessary corrections to the man document
After experimenting with those 4.5 kernel enhancements
to /proc/<pid>/status, that newly added overview topic
'Memory Types' was found to be in need of some tweaks.

In addition, the 'DATA' description wasn't quite broad
enough since explicit private file mappings impact it.

( lastly, for the record, the 2nd commit referred to )
( below contained an incorrect reference that should )
( have been the original issue 21 commit. instead it )
( showed an invalid SHA-1 hash. i believe i have now )
( identified a flaw in my workflow that produced it. )

Reference(s):
. original patch responding to issue #21
commit e4bbd3ca1a
. subsequent patch with invalid commit ref
commit 5dcbcd00fe

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-04-14 21:04:20 +10:00
Jim Warner
5dcbcd00fe top: add additional memory information to the man page
In response to Issue #21, the commit referred to below
provided some much needed improvements and corrections
to topic `3a. DESCRIPTIONS of Fields' in the man page.
However, it assumed a reader possessed much background
knowledge that may not, in truth, actually be present.

So without, hopefully, insulting anyone's intelligence
this patch offers an expanded discussion of some terms
and concepts within a separate section under OVERVIEW.

[ plus it affords an opportunity to incorporate that ]
[ extremely useful table from Florent Bruneau's post ]

Reference(s):
commit f2a08cf16794ec6085bdecbaf8f7c2887cd4e87f
https://techtalk.intersec.com/2013/07/memory-part-1-memory-types/

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-23 22:25:59 +11:00
Jim Warner
e4bbd3ca1a top: improve/correct several memory fields in man page
Due to quirks in kernel memory management plus limited
information available from /proc/<pid>/status & statm,
some of the top resident memory fields were capable of
exceeding available physical memory. So this commit is
a bit of a band-aid until the kernel has been changed.

Such a change appears to be on the horizon in the form
of three new fields to be added to /proc/<pid>/status.
While not preventing 'resident' memory from apparently
exceeding physical memory, the new fields will help to
clarify any such contingency, if/when we exploit them.

Reference(s):
. original post by Samuel Thibault
https://gitlab.com/procps-ng/procps/issues/21
. informative memory analysis
https://techtalk.intersec.com/2013/07/memory-part-1-memory-types/
https://techtalk.intersec.com/2013/07/memory-part-2-understanding-process-memory/
. kernel changes to /proc/<pid>/status
commit 8cee852ec53fb530f10ccabf1596734209ae336b
commit eca56ff906bdd0239485e8b47154a6e73dd9a2f3

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-15 21:25:33 +11:00
Jim Warner
717d73f1dd top: tweaks to vertical scroll management & 'i' toggle
The commit referenced below claims to disable vertical
scrolling when idle tasks weren't being shown. However
it really addresses only a point in time when that 'i'
toggle is keyed. Left untouched were the up/down keys.

So this commit will simply finish the job of disabling
vertical scrolling whenever tasks which have used some
CPU are the only ones which are currently being shown.

Reference(s):
commit c07f6c5e6d

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-03-12 14:50:57 +11:00
Craig Small
da715e3ca0 Replace %Lu with standard %llu
Multiple scanf()s use the GNU-permitted %Lu. This is not supported in
other libraries and isn't to the POSIX specification. The L modifier
is only used for floats in POSIX.

Replacing %Lu with %llu is the same for GNU libc (scanf(3) says as much)
but means other libraries will work fine.

Closes: #19

References:
 http://pubs.opengroup.org/onlinepubs/009695399/functions/fscanf.html
2016-03-03 21:43:52 +11:00
Jim Warner
94e4749be3 top: extend '=' key to include active 'locate' request
It is documented behavior that when certain other keys
are active, sorts column highlighting will temporarily
be disabled. Among those keys is the 'L' (locate/find)
provision. The equals ('=') key can be used to restore
column highlighting by resetting other keys, except 1.

When a locate/find is active, the '=' key will have no
effect on 'x' column highlighting, which still remains
disabled. Further, when 'L' is active an 'x' keystroke
is processed changing the state of column highlighting
but without any visual clue (since it's yet disabled).

So this commit just extends the '=' key to embrace 'L'
processing resets, just like other highlight disabling
keys while avoiding 'x' state changes if approproiate.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:49 +11:00
Jim Warner
489d23a132 top: ATEOJ_RPTHSH prints hash table entries less often
We'll following the newlib <pids> approach to hashing:

. a 'PIDs at max depth:' portion of that UNREF_RPTHASH
enabled #define is now published only when the maximum
depth of hash table entry chains exceed depths of one.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:28 +11:00
Jim Warner
e1cd74eec9 top: do not co-mingle strings/numbers under namespaces
Craig's recent commit under that newlib branch dealing
with namespace support has prompted me to review top's
handling of those fields. Currently, when such a field
is zero, top displays a dash ('-'). This will mean the
justification toggles ('j/J') will behave incorrectly.

This patch simply allows the potential zero to display
or be suppressed with the already existing '0' toggle.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:23 +11:00
Jim Warner
c7201d52eb top: miscellaneous accumulated tweaks to code/comments
A patch containing the following miscellaneous tweaks:

. remove a function that handled former library errors
[ that function should have gone bye-bye with 3.3.11 ]
[ when those 'wchan' provisions were much simplified ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:01:16 +11:00
Jim Warner
b1f7b2a509 top: update the man document reporting bugs suggestion
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-10-28 21:00:21 +11:00
Jim Warner
3da298c1d6 top: fix unlikely edge case wherein all fields are off
While testing a newlib interface for pids acquisitions
I encountered some unexpected results if an idiot user
(me) turns off all displayable fields. So, this commit
ensures that the PID field will be shown as a minimum.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:56:27 +10:00
Jim Warner
8226ca9838 top: avoid an unnecessary conversion for 'USED' column
When the USED column was introduced the proc_t.vm_swap
& proc_t.resident values were added together. However,
using 'resident' required an additional PROC_FILL flag
not to mention extra conversion of pages to kibibytes.

So now we'll use an already present vm_rss value which
removes any special handling for top's derived column.

And while we're at it we'll trade some more 'resident'
field uses with that more immediately usable 'vm_rss'.

Reference(s):
commit 709785e20b

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:56:02 +10:00
Jim Warner
9ba65bad8e top: miscellaneous accumulated tweaks to code/comments
Jeeze, to correct spelling on one single word (incure)
you had to go and align the entire comments paragraph?

[ well, at least there's one other minor code change ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:52:11 +10:00
Jim Warner
9cc6ed10c8 top: eliminate 'user' from the inspection view headers
Since it's possible that euser name is not being shown
or the horizontal position had been scrolled past that
USER column, then part of those headers will be blank.

So it doesn't make sense to try and show the USER that
is associated with a process at all. Thus, this commit
simply removes the 'user' provision from both headers.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-08-06 21:50:49 +10:00
Jim Warner
c07f6c5e6d top: improve vertical scroll management for 'i' toggle
When a user is taking advantage of the scroll features
it is likely a scrolled vertical position is well past
the first displayable task. That is especially true of
top's forest view ('V') mode where those early systemd
attached processes are generally not very interesting.

As such, should the idle mode toggle ('i') be employed
a distorted display is almost guaranteed because tasks
that have used some cpu, and thus should be displayed,
have already been skipped by virtue of their position.

So this patch temporarily nullifies vertical scrolling
during the period when idle tasks are not being shown.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-07-21 21:23:44 +10:00
Jim Warner
88fe45ef68 top: sacrifice a redundant procps_linux_version() call
With the commit referenced below, the linux version is
no longer available via an external variable. So we'll
eliminate the extra superficial function call employed
at program end as part of a debugging (only) o/p spew.

[ the user will soon be returned to the command line ]
[ & he/she can run their own 'uname -r' if in doubt! ]

Reference(s):
commit 56d9d5e7e7

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-21 08:05:59 +10:00
Craig Small
56d9d5e7e7 library: Change linux version
Added function procps_linux_version() which used to be an
exported integer instead.  Also changed the method of obtaining
the linux version (more correctly the os release) to use a specific
procfs entry. This works for both Linux and FreeBSD.
2015-06-19 21:00:46 +10:00
Jim Warner
3600f652e8 documentation: fix man pages due to refactor for wchan
This patch will bring three of our man pages into line
with the recent refactor of the libprocps wchan logic.

[ and also eliminates more damn eol whitespace which ]
[ snuck in our repo with the commit referenced below ]

Reference(s):
http://www.freelists.org/post/procps/WCHAN,11
commit cf4788c28d

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:21 +10:00
Jim Warner
93666da62c top: adapt to a simplified library interface for wchan
This patch was made necessary by those library changes
in support of recently revised/simplified wchan logic.

Reference(s):
http://www.freelists.org/post/procps/WCHAN,11

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:20 +10:00
Jim Warner
932f54b19d top: correct an alphabetic field error in man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-19 19:09:20 +10:00
Craig Small
505f257a8c library: remove procps_version functions
It doesn't make any sense to have the binary version strings
embedded into the library. The version strings are defined
already either in the Makefile or in include/c.h
2015-06-18 22:37:24 +10:00
Jim Warner
d8aee1a809 top: update man document to support the LXC containers
[ in addition to the primary 'lxc' business, i found ]
[ numerous apostrophes used instead of that back-tic ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-14 15:36:06 +10:00
Jim Warner
2ba7aa8b7d top: add support exploiting new library LXC containers
Reference(s):
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1424253
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1424253

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-06-14 15:36:06 +10:00
Filipe Brandenburger
c1c73c0d00 build-sys: merge automake subdirs into toplevel
This will be required for subdir-objects, otherwise automake will have
problems with more than one Makefile.am having rules to build the same
files.

Tested that it builds and both `make check` and `make distcheck` work.

Tested `make install` and compared the tree with the one installed
before this commit, both installed the binaries to the same locations.
The binaries are also in the same location in the build tree (for
instance, ps/pscommand is still there.)

Checked the binaries for the correct libraries linked into them. Binary
sizes matched before and after this change.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
2015-05-01 23:19:31 -07:00
Filipe Brandenburger
90cc5460aa build-sys: add $(top_srcdir) to include search dir
This is required for out-of-tree build to work, since many source files
include e.g. proc/*.h which is not under the include/ directory.

Tested that `make distcheck` starts working after this patch.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
2015-05-01 17:09:55 -07:00
Tobias Stoeckmann
c7abb6a6ed top: correct a small typo in manual page
Reference(s)
http://www.freelists.org/post/procps/PATCH-typo-in-top1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
e107f5d63b top: miscellaneous accumulated changes to program code
This commit just tweaks top in the following respects:

. for alphabetic integrity, change 'INSP_hdr...' names

. eliminate the -Wsometimes-uninitialized warning that
was found under OSX Yosemite (llvm 6.0/clang-600.0.56)

. update program 'comments' reflecting copyright dates

Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
8bcdd2145d top: miscellaneous accumulated changes to man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2015-04-07 20:46:15 +10:00
Jim Warner
da06b8fa59 top: tweak forest view protections for forking anomaly
A recent commit eliminated the potential for a storage
violation with forest view mode. It occurred when some
program (erroneously?) created a lengthy forking loop.
However, the associated commit message was misleading.

The message implied that an unexpected order following
a sort on start_time was the cause of storage overruns
and a 'char' used to track nesting level only distorts
the display when it goes negative. Actually, the truth
is really just the opposite. Any start_time sort quirk
causes no harm while that 'char' can yield corruption.

Should some child end up sorted ahead of its parent by
way of an extremely unlikely shared start_time the end
result is such a child will be displayed unnested just
like init or kthreadd along with all its own children.

However, if nesting levels exceeded 255 (and became 0)
a massive array overrun could be triggered when such a
task and *all* its children were added to an array for
the second time. Exactly how much storage was violated
depended on the number of children that zeroed process
had spawned (hinted at via either SIGSEGV or SIGABRT).

The earlier commit limited nested levels to 100 so the
root cause of the storage violation was already fixed.
The potential for distorted nesting levels due to sort
on start_time would seem to remain. But it's extremely
unlikely that 2 tasks would share the same start_time.

Even so, a new #define has been introduced which makes
top impervious to the order of tasks such that a qsort
is no longer necessary (providing an init/systemd task
exists & was harvested as the first task by readproc).
It can be utilized if distorted nesting ever becomes a
real issue. But since there is a 5-10% performance hit
with that, we'll continue using start_time as default.

References(s):
commit ce70017eb1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-10-29 17:00:03 +01:00
Jim Warner
ce70017eb1 top: provide some protection against forking anomalies
This commit will eliminate a very nasty bug associated
with top's forest view mode.  It addresses a potential
SIGSEGV/SIGABRT that was only encountered when another
program (erroneously?) creates a lengthy forking loop.

If the growing list of nested children is sufficiently
fast such that proc_t start_time is duplicated between
children then the sort upon which top relies might not
produce the expected order. That, in turn, could cause
the forest_adds function to initially miss some child.

But that missed child would be caught by forest_create
and eventually would cause our array boundary overrun.
Such overrun occurs when some child of that originally
*missed* child is found and a duplicate add attempted.

In correcting this bug we'll also use this opportunity
to prohibit a borrowed proc_t padding byte (char) from
going negative. If the nesting level exceeded 127, the
effect was an "unnesting" with the snprintf width then
viewed as flag+width also yielding left justification.

Henceforth, we'll limit nesting to 100 with subsequent
children shown as " +  ", not the usual " `- " prefix.

References(s):
https://bugzilla.redhat.com/show_bug.cgi?id=1153642
http://www.freelists.org/post/procps/Bug-in-the-forrest-view,6

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-10-27 17:18:47 +01:00
Jim Warner
b0767bd391 top: ensure previously saved rcfile honored completely
When startup defaults were changed users with existing
rcfiles would likely find their previous configuration
was not being honored in all respects. The disparities
involved Graphs modes and Summary/Task memory scaling.

This patch simply restores what was always intended as
the proper behavior for previously saved config files.

References(s):
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762928
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=762947
. new startup defaults
commit 8ef6cd91fc

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-09-29 08:22:13 +10:00
Jim Warner
8adf4acc03 top: final tweak to recent changes for new graph modes
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-11 16:39:51 +02:00
Jim Warner
e92b692932 top: swat a potential buglet affecting new graph modes
This patch will cure a potential aberration associated
with a terminal's size (SIGWINCH) and top's new graphs
modes. The symptoms were a dangling tilde (~) plus the
potential loss of a graph's right-most visual content.

The condition was only apparent when a %Cpu approached
100% usage. Also the apparent loss of content affected
the 'block' graph only. With 'bar' graphs, that affect
became the loss of proper right-most bar graph colors.

The cause was determined to be a combination of: 1) an
unnecessary snprintf precision specification; and 2) a
rounding quirk for any graphs which displayed distinct
types of information (as for user/syst, used/unavail).
These could then combine to produce an extra bar/block
which, in turn, resulted in the truncation of a pseudo
termcap attribute used by the show_special() function.

What was originally interpreted as an intractable race
condition turns out to be just a self inflicted wound.

Reference(s):
http://www.freelists.org/post/procps/top-Possible-bug-in-the-graphs,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-08 22:14:21 +02:00
Fredrik Fornwall
dfe1f7d104 top: replace <values.h> with <limits.h> plus <float.h>
This fixes a compilation problem on Android which lacks values.h.

Reference(s):
https://gitorious.org/procps/procps/merge_requests/26

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-08-08 22:14:21 +02:00
Jim Warner
5380ef9022 top: adapt global memory support to new library format
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-31 15:10:42 +02:00
Jaromir Capik
cbba7ad7a7 top: exclude reclaimable slabs from used 2014-07-22 14:07:45 +02:00
Jim Warner
c437faf8d3 library: evolve MenAvailable algorithm on older kernel
Let's not report zero for kb_main_available when older
kernels don't have MemAvailable. Instead, if we simply
duplicate the 'free' amount we can avoid all ancillary
problems, such as those involving top's graphing mode.

Reference(s):
http://www.freelists.org/post/procps/kb-main-available-etc,3

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-21 16:17:52 +02:00
Jim Warner
7391699b07 top: correct one grammatical error in the man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-18 20:49:58 +02:00
Jim Warner
d310a18fc2 top: exploit new kb_main_available, make Jaromir happy
This patch will trade a former pessimistic calculation
of free physical memory for a more optimistic one that
uses the newly added kb_main_available library export.

But in case one might wish to return to the old former
method, there's a new #define that was made available.

[ the new calculation will affect graphing mode only ]

Reference(s):
http://www.freelists.org/post/procps/systemd-support-to-library,9

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-18 20:49:57 +02:00
Jim Warner
9500dc198c top: trade Page_size for that newly exposed page_bytes
Might as well use the newly exposed sysinfo.h variable
'page_bytes' rather than our own. Plus, in the process
we can avoid incurring yet one more function call hit.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-18 20:49:57 +02:00
Jaromir Capik
6dbe8fd18e docs: top.1 minor fix
RES - memory task has used -> is using
2014-07-17 13:08:29 +02:00
Jim Warner
6cd8691720 top: fix potential 'nan', should a system have no Swap
Gosh, just because most of us might run with some swap
file allocated, not every system might. I only wish my
testing methodology was as sophisticated as Jaromir's.

Reference(s):
http://www.freelists.org/post/procps/latest-top-enhancements,7

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-07 18:43:52 +02:00
Jim Warner
1dd0c4d07f top: as with ps, distinguish between 'T' and 't' state
Wow, even the linux/Documentation/filesystems/proc.txt
document doesn't provide us with that level of detail.

Thank you, Jaromir, for your additional clarification!

Reference(s):
commit 411d218793

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-07 18:43:52 +02:00
Jim Warner
a7741055f1 top: add another translation hint for graphs alignment
This should be the last of this kind of crap. I'll get
to work on some means to no longer burden a translator
with lengths requirements. Ideally each word should be
allowed to stand alone and the minimum/maximum lengths
handled programmatically when our ol' top is executed.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-07 18:43:52 +02:00
Jim Warner
206570e8c4 top: with new startup defaults, tweak the man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-07 18:43:52 +02:00
Jim Warner
c75586f523 top: eliminated unreferenced macros & an error message
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-07 18:43:52 +02:00
Jim Warner
8ef6cd91fc top: retire old stale startup defaults in favor of new
For over a decade top has used a startup configuration
mimicking the original redhat top. This decision dates
back to when the forked Sourceforge version was trying
to win over users in battles with that ancient kludge.

Will anybody deny that those defaults are coyote ugly?

Well, it is time that top presented a more modern look
at startup, providing that no saved rcfile exists. But
just in case some distro prefers that old, comfortable
look, there's the '--disable-modern-top' build option.

[ Pssst. With the widened memory fields it turns out ]
[ the 'Mem' default window had become almost useless ]
[ on an 80x24 terminal since %CPU & COMMAND were out ]
[ of view. So some other defaults were tweaked a bit ]
[ whether or not --disable-modern-top was specified. ]

Reference(s)
http://www.freelists.org/post/procps/tops-graph-mode-saga-continues,3

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-01 21:30:46 +10:00
Jim Warner
2199af404a top: maximize recent locale aware numeric enhancements
When startup argument parsing was recently enhanced to
account for LC_NUMERIC settings, some user input logic
dealing with numbers fails to exploit that capability.

This patch extends such enhancements to a running top.

Reference(s):
commit f7b84f45c7
http://www.freelists.org/post/procps/topwatch-floating-point-input,2

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-07-01 21:30:45 +10:00
Jim Warner
96c330e3b3 top: afford each window its own cpu/memory graph modes
When those new cpu/memory graphs modes were introduced
they had global impact. In other words, the modes that
were chosen for a 'current' window affect Summary Area
appearance for every other window as well, even though
each window sets unique View_STATES/View_MEMORY flags.

I do not know how widespread the use of top's separate
window provisions is, but I do know that documentation
promises every window (field group) provides "a unique
separately configurable summary area". And even though
that promise does not include memory scaling (separate
'E' command) the graph modes are integral to 't' & 'm'
and those were already observed on a per window basis.

So this patch just takes the cpu and memory graph mode
values out of global scope in the configuration file &
gives each window its own unique pair of graph values.

Reference(s):
commit 1d171ec741

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-28 23:46:40 +10:00
Jim Warner
805532ac32 top: fix translation hint to preserve graphs alignment
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-28 23:46:40 +10:00
Jim Warner
f7b84f45c7 top: tweak argument parsing for some locale situations
Boy I hate locale stuff. For code I thought was pretty
robust, Jaromir sure proved that it wasn't. Anyway, me
thinks this commit closes some gaps and will cause top
to behave appropriately under various locale settings.

It does *not* permit top to respond to the ',' and '.'
floating point separator without regard to the locale.
It does, however, enforce proper LC_NUMERIC responses.

Let's look on this commit as an interim solution until
Jaromir can create that proposed 'fp_decode' function.
Who knows, he might even borrow some of our mkfloat().

[ An aside: the coreutils sleep and timeout programs ]
[ claim to permit floating point arguments. However, ]
[ neither one will accept the comma separator should ]
[ the locale be a country that in fact uses a comma. ]

[ In other words, with this commit we are way ahead! ]

Reference(s):
http://www.freelists.org/post/procps/topwatch-floating-point-input
http://www.freelists.org/post/procps/topwatch-floating-point-input,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-25 13:58:31 +02:00
Jim Warner
cec1976511 top: let's not pretend top can catch SIGKILL & SIGSTOP
While there was no harm done setting a handler for the
above two signals, they are in fact uncatchable. Thus,
whenever we ran with valgrind we're politely reminded.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-25 13:58:30 +02:00
Jim Warner
db6381ae04 top: scale length for new graphs to a terminal's width
When the beginning of the Mem/Swap graphs was variable
scaling them to the current terminal's width was a bit
of a costly nightmare. So the graph size was fixed and
subject to truncation. However now that the start of a
graph can be easily predicted, I've revisited scaling.

As it turns out, any cost is minimal & mostly incurred
at an opportune time, at SIGWINCH or user interaction.
Plus, most of the apparent arithmetic is actually just
a means of documenting and will disappear thru compile
time constants in the ultimate generated machine code.

Note: those graphs will now behave just like any other
Summary Area element - they will scale from full sized
down to a terminal width of 80 columns, at which point
those displayed graphs are then subject to truncation.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-24 20:38:30 +10:00
Jim Warner
41ab7f005e top: with new bar graphs, make 'b' toggle unrestricted
While the 'b' toggle remains window based (vs. global)
it should no longer require that the window be visible
and either the 'x' or 'y' toggles to be on. Previously
those requirements were intended to remind a user that
there must be something for this command to highlight.

With the introduction of graph modes (specifically the
the bar graph) the 'bold/reverse' toggle has important
implications beyond highlighting some columns or rows.

The %Cpu(s) graph and Mem portion of the memory graphs
are designed to offer a visual clue as to the separate
elements comprising them. But that separation could be
lost under some X color schemes or when top is running
without color (in monochrome mode) and the block graph
is selected. But, if the graph is then changed to bars
any separation always becomes visible whenever the 'b'
toggle is turned off. Portions then show in 'reverse'.

So from now on we'll check nothing, we'll just toggle.

[ Besides, with all the code thrown at restricting a ]
[ 'b' toggle use, it might have all been for naught. ]
[ That toggle could still be set/unset using the 'Z' ]
[ command and the color mapping screen. Geez Louise! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-24 20:38:30 +10:00
Jim Warner
d8a8822b5f top: reflect current graph modes state in man document
This patch just beefs up the man documentation for the
new graphs modes while also reflecting the most recent
program changes, prompted by the feedback shown below.

Reference(s):
http://www.freelists.org/post/procps/latest-top-enhancements,1

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-24 20:35:20 +10:00
Jim Warner
b8614adcb5 top: make '#define GRAPHS_ALIGN' an immutable solution
My original graph modes implementation made no attempt
to align the Cpu & Mem/Swap graphs. I thought, rather,
that such alignment could be best achieved by the user
using top's 'E' memory scaling command toggle. In that
way Mem/Swap prefixes could be reduced by 3 positions,
bringing the beginning '[' into line with the %Cpu(s).

If that proved to be too cumbersome a #define could be
enabled making the Mem/Swap prefix static while adding
a few padding bytes to the %Cpu line(s) for alignment.
It was those waisted bytes that were the most concern.

What I had not counted on was the fact that the memory
lines themselves might become misaligned & that became
likely with more physical memory present. That too can
be cured with the 'E' command but as scaling is raised
we soon reach a meaningless total such as '0.003' even
though the displayed % remains valid (and unchanging).

So this commit implements unconditionally what used to
be conditional. But, instead of waisting padding bytes
we'll put that space to good use with a new 'total %'.

Reference(s):
http://www.freelists.org/post/procps/latest-top-enhancements,1
commit 1d171ec741

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-24 20:35:20 +10:00
Jim Warner
f33d49c6cf top: shorten some lines by changing a few declarations
My first blush graphs modes implementation went just a
tad overboard on identifier lengths. As a result, some
program lines were getting quite long. So, this commit
will simply shorten some excessively long identifiers.

Reference(s):
http://www.freelists.org/post/procps/latest-top-enhancements
commit 1d171ec741

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-24 20:35:20 +10:00
Jim Warner
77376e5c67 top: add graphs modes for cpu and memory, man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-22 21:39:55 +10:00
Jim Warner
1d171ec741 top: add graphs modes for cpu and memory, program code
This patch makes 't' (View_STATES) & 'm' (View_MEMORY)
commands into 4-way toggles. The two new modes provide
for two different graphs of the cpu and/or memory use.

These new capabilities are similar to those offered by
the 'htop' program. However they're aesthetically more
pleasing (to me) plus the scalings are more authentic.

Poor ol' top has long been troubled by the comparisons
offered up by the 'htop' program. Many of those things
were only true of the original redhat top while others
are no longer true of this current top program. So let
me use this commit msg to begin to correct the record.

Corrected comparisons between 'htop' & 'top' programs:
------------------------------------------------------
+ htop does not start faster, actually reverse is true
+ top offers scrolling vertically and horizontally too
. (and top offers better <Home> and <End> key support)
+ unassigned keystrokes don't subject top to any delay
. (but htop suffers that annoying ncurses <Esc> delay)
+ in top one need not type the PID to kill the process
+ in top one need not type the PID to renice a process

Some things the 'htop' program was not bragging about:
------------------------------------------------------
+ top can outperform the htop program by a wide margin
+ htop + SIGWINCH = corrupted display + restart likely
+ htop cannot preserve its screen data at suspend/exit
+ the htop column management scheme is very cumbersome
+ htop allows columns to be duplicated again and again
+ htop displays only full command lines, not pgm names
. (and that 'Command' column must always be displayed)
. (and it must always remain as the last column shown)
+ htop does not provide for any sort of command recall
+ htop's search feature does not highlight any matches
+ there is no 'find next' outside of htop search modes
+ htop does not allow Header or Process memory scaling
+ htop provides no flexibility on column justification
+ htop does not provide the means to change col widths
+ htop provides less control over colors configuration
+ htop always overwrites the rcfile with any UI change

Someday, maybe we'll provide a better comparison as an
addendum for (or replacement of) that README.top file.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-22 21:39:55 +10:00
Jim Warner
318919094d top: rearrange Mem & Swap lines and standardize 'used'
In anticipation of upcoming memory graphing provisions
the abbreviations 'Mem' and 'Swap' are being made into
individual translatable strings in order to be reused.

Additionally, the Mem 'used' amount will now no longer
included the 'buffers' and 'cached' values. Thus, each
Mem category becomes unique. This is the approach used
by tools such as 'htop' or the gnome 'System Monitor'.

Lastly, with that change to the 'used' category it has
been repositioned after 'free' on the Mem & Swap lines
making a comparison between 'total' and 'free' easier.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-06-22 21:39:55 +10:00
Jim Warner
23ebb9f44d top: tweak hotplugged response and frame refresh logic
For some time now, top has refrained from updating the
current number of cpus and memory totals with each and
every refresh cycle. Rather, to lessen overhead costs,
such values are updated periodically (5 min & 3 secs).

The delay in updating the cpu count was only important
with the addition of a cpu, since any loss is detected
immediately. And the large interval was chosen because
of the costs once associated with a glibc sysconf call
and an unlikely scenario of physically adding the cpu.

But the ease with which cpus can be taken offline then
placed back online under linux suggests that 5 minutes
may be too high. So, without addressing the likelihood
of that act, top is now more responsive in these ways:

1) that 5 minute interval has been reduced to 1 minute
2) any key, not just Enter/Space, refreshes cpus & mem

Note: we leave the man document as is, suggesting that
only the Enter/Space keys force an update for hotplug.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-05-28 06:53:19 +10:00
Jim Warner
1e8d0a323b top: add missing summary area info to the man document
Way back for release 3.2.6 of the original procps top,
a patch was introduced to explain abbreviations in the
summary area showing cpu state percentages. Ever since
that time the the 'id/idle' category has been missing.

This patch simply corrects that oversight, having been
noticed after a review of the outstanding Ubuntu bugs.

Reference(s):
. deficiency yet unresolved (May 2010)
https://bugs.launchpad.net/ubuntu/+source/procps/+bug/574624
. patch incorporated into 'ng' (Feb 2011)
commit ee5fd1dce1
. cpu states doc requests (Jun 2005, Jan 2004)
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=312157
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=228899

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-05-28 06:53:19 +10:00
Jim Warner
444fa7102b top: miscellaneous accumulated changes to man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-05-13 16:39:49 +02:00
Jim Warner
0caa6d6e67 top: miscellaneous accumulated changes to program code
. prevent any input recall overrun if window downsized
. adjust translation notes for true column hdr maximum

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-05-13 16:39:49 +02:00
Jim Warner
bef6b0f025 top: standardize <Esc> key support with prompted input
In release 3.3.6, some commands were equipped with the
concept of a 'default pid'. The initial implementation
meant that the intuitive <Esc> key would not always be
treated as one would expect under any well behaved UI.

This patch ensures the expected <Esc> key behavior of:
terminating user input while still making possible the
necessary distinction between 'no input' & 'defaults'.

Reference(s):
http://www.freelists.org/post/procps/top-Escape-doesnt-abort-kill-command

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 20:56:48 +02:00
Jim Warner
fe37ad15cd top: avoid a 'nan' when the delay interval is very low
The granularity of /proc/uptime is fixed at hundredths
of a second. And, since we can cycle faster than that,
we are exposed to 'nan' when calculating elapsed time.

This commit will protect us from that outcome when the
delay interval has been set to an extremely low value.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 20:56:48 +02:00
Jim Warner
2f4f175c59 top: swap opening quotes for back-tics in man document
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 20:56:48 +02:00
Jim Warner
c9f7cc7025 top: minimize the usage of apostrophes in man document
In addition to eliminating numerous single quote usage
this commit also escaped '\' a few overlooked hyphens.

And some 'unformatted' spacings were adjusted as well.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 20:56:48 +02:00
Jim Warner
f3e55ee661 top: refactor man document so as to allow translations
The majority of changes in this commit are intended to
enable translation of top's man page. There were three
kinds of errors as seen by that po4a-updatepo program.

. a valid but unrecognized request concerning no-break
. an internally defined macro with a groff .de request
. occasional apostrophe at the beginning of some lines

With respect to the apostrophe, some have been changed
to back-tic since line placement could not be assured.
And other parts were re-flowed to avoid temptations to
escape as \' (technically an acute accent). Of course,
the opening back-tic with closing apostrophe looks odd
when ASCII, but should be rendered correctly as UTF-8.

It may yet be necessary to change the remaining single
'opening' quotes to back-tics as translation proceeds.
Should that become necessary, I intend to reduce quote
usage to the bare minimum throughout the man document.

There were also some formatting changes to enhance the
man2html output and then to other formats via htmldoc.
And, I wish to acknowledge that my meager groff skills
do not serve those programs very well at all. In other
words groff yet remains mostly incomprehensible to me.

Lastly a few content plus copyright updates were made.

Message(s):
. Unknown macro '.c2 `'. Remove it from the document, or refer to the Locale::Po4a::Man manpage to see how po4a can handle new macros.
. This page defines a new macro with '.de'. Since po4a is not a real groff parser, this is not supported.
. Unknown macro ''real time' scheduling priority.'. Remove it from the document, or refer to the Locale::Po4a::Man manpage to see how po4a can handle new macros.

Reference(s):
. oriiginal post/patch
http://www.freelists.org/post/procps/Translations-for-man-pages

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 20:56:48 +02:00
Jim Warner
e2868da34e top: update copyright dates plus 1 preprocessor change
Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 13:46:06 +02:00
Jim Warner
22e6582974 top: protect against distortion when system time reset
If a system's time is adjusted backwards, then elapsed
time could appear as negative. This yielded a negative
%CPU value. Alternately if zeros were suppressed ('0')
the result was a blank %CPU column. In both cases that
distortion would last for one display cycle or until a
user forced a display refresh via some keyboard input.

The original recommendation was trading gettimeofday()
for clock_gettime() using CLOCK_MONOTONIC. But on some
systems that might not be possible, forcing the use of
CLOCK_REALTIME instead. Not only would that complicate
the build system, but it may leave us with minus %CPU.

Another approach was to ensure that elapsed time could
never be negative. Of course, this produced distortion
of %CPU values but it would be proportionally correct.
This wasn't dissimilar to a distortion already present
should the time be adjusted forward or backward within
any 'remaining' top delay intervals. These aberrations
would be avoided with clock_gettime & CLOCK_MONOTONIC,
but that is a less than ideal solution as noted above.

This final solution, which originated down under, will
simply rely on the /proc/uptime seconds, which will be
immune to *any* tampering with the system clock. Thus,
we now have a fix for the distortion we didn't know we
suffered plus a negative %CPU that began this odyssey.

Thanks to:
sk.alvin.x@gmail.com, for the original effort
jcapik@redhat.com, for a heads up on CLOCK_MONOTONIC
csmall-procps@enc.com.au, for the best suggestion of all

Reference(s):
. original post/patch
http://www.freelists.org/post/procps/PATCH-top-use-clock-gettime-instead-of-gettimeofday
. heads up on CLOCK_MONOTONIC
http://www.freelists.org/post/procps/PATCH-top-use-clock-gettime-instead-of-gettimeofday,2
. the final solution
http://www.freelists.org/post/procps/PATCH-top-use-clock-gettime-instead-of-gettimeofday,11

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-04-28 13:46:06 +02:00
Yuri Chornoivan
2ec9f5c22e Minor i18n fixes
Minor fixes that the translator (Yuri) has found in some of the
strings. You only know how many typos and thinkos you have when
someone is trying to translate it.

Signed-off-by: Craig Small <csmall@enc.com.au>
2014-03-03 21:58:56 +11:00
Jim Warner
24f1fbd9d0 top: avoid name conflict in the next version of stdlib
Since its inception top has always used enumerators to
identify displayable fields. They've taken the form of
P_PID, etc. As it turns out, something has changed for
libc6-dev versions beyond 2.17-93 wherein 'P_PID' will
now be exposed via stdlib.h. I have not pinpointed the
exact cause but it may depend on header include order.

This patch just trades top's long standing 'P_' prefix
convention for that of 'EU_' (short for enumerator). I
cannot find *any* header under /usr/include/ currently
utilizing this particular three character combination.

And as a further safeguard top will henceforth include
'system' specific headers after the standard includes.

Reference(s):
http://www.freelists.org/post/procps/top-wont-compile-anymore

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-02-27 06:30:44 +11:00
Jim Warner
bcf4f5a830 top: restore the former behavior after stderr redirect
When top originally responded to the potential libnuma
stderr write, the library was consistently called with
each refresh cycle. That, in turn, guaranteed that any
warning message would be seen at program end by virtue
of: 1) having been issued before the 2nd refresh cycle
and; 2) benefiting from inherited /dev/null buffering.

A later efficiency refactor meant the numa library may
not always be called with every refresh cycle. Rather,
it was only called if top was in one of two numa views
(the '2' or '3' toggles). That, in turn, resulted in a
loss of any warning message at program end unless numa
mode had been preserved in the rcfile. In other words,
if top was started normally then a single cycle stderr
redirect would have long passed by the time the '2' or
'3' toggle was activated. The warning message actually
was spewed but quickly lost to the full screen refresh
which follows all keyboard interactions with the user.

This commit simply moves the restoration of our stderr
redirect to program end (instead of that first display
refresh). Now, any libnuma stderr warning message will
appear as the concluding output line upon quitting top
without regard to when any numa mode view was invoked.

And since this technique might be useful in some other
context (as an example of how to 'buffer' stderr) it's
been generalized with its own #define. But to maximize
its usefulness, the original redirect should be issued
much earlier in pgm startup than top has chosen to do.

Reference(s):
. original libnuma stderr response (msg seen)
commit 35dc6dcc49
. numa refractoring for efficiency (msg lost)
commit f12c0d5c6e

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-02-22 11:16:22 +11:00
Jim Warner
b6fcb602ce top: provide for discontinuous (not active) NUMA nodes
Apparently there are occasions when NUMA nodes may not
always be contiguous. Under such conditions nodes that
were not used would still occupy precious Summary Area
space showing 100% idle, under the '2' command toggle.

With this commit top will no longer display numa nodes
that have no associated cpu when the '2' toggle is on.
But just in case we wish to return to former behavior,
a new #define called OFF_NUMASKIP has been introduced.

And as an aside, a recent refactor mentioned below set
the stage for this patch to be 'self-tuning'. In other
words, if an inactive/non-displayed node should become
active (if even possible), then top will begin showing
such a node automatically with the next screen update.

Unfortunately, all inactive nodes now 'suppressed' are
still accessible via the '3' command. Those nodes will
just be displayed as empty (no associated cpus shown).
This is not really a top problem but more of a libnuma
and/or user deficiency. The library lacks the means to
validate a node id and the user then input a node that
was not even shown under a '2' toggle Summary display.

( too bad libnuma does not offer an 'is_node_active' )
( type function so top could warn a user when such a )
( discontinuous node was requested using his '3' cmd )

( sure, top could achieve this objective himself but )
( that would require making yet another array global )
( which i'm just not in the mood to do - besides, we )
( have already made enough concessions to libnuma.so )

Lastly, an existing #define (PRETEND_NUMA) was changed
to 'disable' node #1 so as to simulate a discontinuous
node. This allows testing of the '2' and '3' commands.

Reference(s):
http://www.spinics.net/lists/util-linux-ng/msg08671.html
. set stage for self tuning
commit f12c0d5c6e

Signed-off-by: Jim Warner <james.warner@comcast.net>
2014-01-20 19:10:22 +01:00
Jim Warner
14ef47af57 top: do not forget the fscanf %s terminating null byte
Reference(s):
http://www.freelists.org/post/procps/procpsng-339-defects-found

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-12-19 15:27:11 +01:00
Jim Warner
4c464acf28 top: follow usual name conventions for global variable
A recent change involving a one cycle stderr redirect,
to handle a libnuma potential transgression, failed to
follow normal global variable naming conventions. This
patch will capitalize the 1st letter of 'Stderr_save'.

Reference(s):
commit 35dc6dcc49

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-12-02 21:37:36 +01:00
Jim Warner
57ab5eed15 top: do not lie about purported alphabetical orderings
Excluding those special X_XON/X_XOF enums, which might
not even be present, restore strict collating order of
all the case labels in the task_show switch statement.

Also, adjust a few sort callbacks for the same reason.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-12-02 21:37:36 +01:00
Jim Warner
af4e6533ba top: increase the maximum number of displayable fields
The recent addition of namespaces, combined with those
potential suse out-of-memory fields, means that we are
close to the maximum number of fields poor ol' top can
display. Imagine, the really old top was limited to 26
fields (28 with the suse hack) and this top had neared
the version 'g' rcfile limits which were a healthy 55.

This patch adds another 15 fields to the maximum while
making it even easier to increase in the future. Also,
top still silently accommodates older config files all
the way back to the original pre-ng version top-3.2.8!

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00
Jim Warner
675200b20b top: expand the man page to include namespaces support
Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00
Jim Warner
2aa0951d1b top: expand this program to include namespaces support
Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00
Jim Warner
89c2f28e39 top: eliminate yet more gcc subscript resolution bloat
This patch is inspired by the 'minimize numa overhead'
patch. It trades the use of subscripts for pointers to
avoid gcc repeated subscript offset calculation bloat.

Now, throughout the cpus_refresh function, a subscript
will be resolved just once & this will (dramatically?)
reduce the path-length taken for each and every frame!

For example, a non-optimized compilation could produce
400+ fewer machine instructions through pointer usage.

[ ok, optimized compiles only save 18+ instructions! ]

Lastly, any residual 'symmetry only' crap is now gone!

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00
Jim Warner
f12c0d5c6e top: minimize the statistics overhead for numa support
A recent libnuma potential corruption problem solution
has caused me to reevaluate some associated numa logic
for efficiency. Here is a summary of the problems that
exist with current libnuma/user possible interactions:

. Whenever the numa library was present extra overhead
would always be incurred in maintaining the node stats
even when the '2' or '3' commands were not being used.

. As part of such overhead a separate loop was used to
reinitialize each cpu/node structure with each display
cycle so that prior accumulated totals were preserved.
Again, it didn't matter if numa data was really shown.

This commit attempts to refocus on the 'critical path'
costs in a running top by optimizing for the occasions
when numa node data is not being displayed. Under such
conditions, no extra overhead will be incurred whether
or not a distribution has the libnuma library present.

To achieve this goal, some additional overhead will be
incurred, but only when actually displaying numa data.
And all such new costs have been minimized in spite of
the gcc inclination to duplicate subscript resolution.

Reference(s):
commit 24bd950cb2e1722d459461f0f9c0c30a4b9ffdaa

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00
Jim Warner
bdb2fe0056 top: add some flexibility to dlopen() for numa support
A recent libnuma potential corruption problem solution
suggests that libnuma could change in the future so as
to not spew to stderr. This then raises a question how
top could exploit any such library change since we are
currently locked into version #1 of the library by way
of our dlopen("libnuma.so.1", RTLD_LAZY) runtime call.

While not an ultimate solution, this commit will first
try for the most recent version of that library during
top's startup before trying the original libnuma.so.1.
We do this via the unqualified library soname symlink.

For this new dlopen() call to succeed, technically the
numa 'devel' package would usually have been required,
but that's not always true with every distro. And when
the libnuma.so symlink isn't present, it can always be
manually added should a newer & better behaved library
arrive & users tire of the stderr warning at top exit.

Reference(s):
commit 24bd950cb2e1722d459461f0f9c0c30a4b9ffdaa

Signed-off-by: Jim Warner <james.warner@comcast.net>
2013-11-25 20:57:32 +11:00