Commit Graph

12 Commits

Author SHA1 Message Date
Denys Vlasenko
21b7f1b6b6 hush: fix a few more corner cases with empty-expanding cmds
See added testcases

function                                             old     new   delta
run_pipe                                            1723    1784     +61

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-05 15:15:53 +02:00
Denys Vlasenko
41d8f10813 hush: fix corner cases with exec in empty expansions
Cases like these:

var=val exec >redir

var=val `` >redir

function                                             old     new   delta
run_pipe                                            1701    1723     +22
redirect_and_varexp_helper                            56      55      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 22/-1)              Total: 21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-05 14:41:21 +02:00
Denys Vlasenko
9acd63c92c ash,hush: fix "saved" redirected fds still visible in children
Based on a patch by Mark Marshall <mark.marshall@omicronenergy.com>

function                                             old     new   delta
dup_CLOEXEC                                            -      49     +49
fcntl_F_DUPFD                                         46       -     -46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-28 18:35:07 +02:00
Denys Vlasenko
035486c750 ash: significant overhaul of redirect saving logic
New code is similar to what hush is doing.
Make CLOSED to -1: same as dash.
popredir() loses "restore" parameter: same as dash.
COPYFD_RESTORE bit is no longer necessary.

This change fixes this interactive bug:

	$ ls -l /proc/$$/fd 10>&-
	ash: can't set tty process group: Bad file descriptor
	ash: can't set tty process group: Bad file descriptor
	[1]+  Done(2)                    ls -l /proc/${\$}/fd 10>&4294967295

function                                             old     new   delta
unwindredir                                           29      27      -2
tryexec                                              154     152      -2
evaltree                                             503     501      -2
evalcommand                                         1369    1367      -2
cmdloop                                              187     185      -2
redirect                                            1029    1018     -11
popredir                                             153     123     -30
need_to_remember                                      36       -     -36
is_hidden_fd                                          68       -     -68
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/7 up/down: 0/-155)           Total: -155 bytes
   text    data     bss     dec     hex filename
 914572     485    6848  921905   e1131 busybox_old
 914553     485    6848  921886   e111e busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:21:46 +02:00
Denys Vlasenko
621fc50e83 hush: fix a case when redirect to a closed fd #1 is not restoring (closing) it
function                                             old     new   delta
setup_redirects                                      200     245     +45
append_squirrel                                        -      41     +41
save_fds_on_redirect                                 256     221     -35
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 86/-35)             Total: 51 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24 12:42:17 +02:00
Denys Vlasenko
2db74610cd hush: fix two redirection testcase failures
function                                             old     new   delta
save_fds_on_redirect                                 183     256     +73
fcntl_F_DUPFD                                          -      46     +46
restore_redirects                                     74      96     +22
xdup_and_close                                        51      72     +21
setup_redirects                                      196     200      +4
hush_main                                            988     983      -5
static.C                                              12       -     -12
run_pipe                                            1595    1551     -44
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 4/2 up/down: 166/-61)           Total: 105 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07 22:07:28 +02:00
Denys Vlasenko
111cdcf295 shell: sync redir/* tests
Note: hush-redir/redir_to_bad_fd.tests currently fails

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06 21:01:50 +02:00
Denys Vlasenko
50b8b2914b hush: add a TODO about redir3.tests failure
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06 20:57:37 +02:00
Denys Vlasenko
a107ef2a6a hush: rename hush-redir/redir3.tests (ash has redir3.tests which id different)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-06 20:36:40 +02:00
Denys Vlasenko
86584e134e ash: fix open fds leaking in redirects. Closes 9561
commit e19923f665 deleted clearredir()
call in shellexec():

	ash: [REDIR] Remove redundant CLOEXEC calls
	Upstream commit:

	Now that we're marking file descriptors as CLOEXEC in savefd, we no longer
	need to close them on exec or in setinputfd.

but it missed one place where we don't set CLOEXEC. Fixing this.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-07 10:16:56 +01:00
Denys Vlasenko
df303ae117 sh testsuite: sync ash-redir/ and hush-redir/
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-02 18:32:52 +02:00
Denys Vlasenko
c4cf542c57 sh testsuite: create hush-redir/* and move files around
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-10-02 17:55:51 +02:00