> Hi,
> this is a first attempt of size optimization for zcip taking into account all
> the hints given so far on the list.
> I've applied just the more obvious busyboxifications so maybe it could be
> optimized more.
BTW: I've ripped out a lot of debug code and changed c++ // comments to /* */
as both were rather confusing for a newbie like me. ;-)
Sorry to the author for that.
I know that this makes mantaining the code easier, but I'm simple minded....
This is a first attempt to improve the comments of getopt_ulflags.c.
Maybe under some aspects the text could be refined, but so
far it is already usable and should help people who "avoided getopt_ulflags as the pest" to understand how it works.
This patch was created with the help of
Vodz, the author of the code, who explained me patiently
how getopt_ulflags works
and with the help of
Paul Fox, who corrected my broken english.
So thanks and merits should go to them also.
Is the change on libbb/loop.c which you commited in 2005/1/3 effective
really?
The __GLIBC__ macro and __UCLIBC__ macro are defined in
feature.h in glibc source, so the change may not be effective.
If you want to check this with __GLIBC__, feature.h header is needed.
Some architectures(e.g. PPC series) need to include linux/posix_types.h
in stead of asm/posix_types.h, so the patch which is attached with
this mail include <linux/posix_types.h>.
Hi to all,
This patch contains just some fixes for some misleading
comments in my_getpwuid.c and my_getug.c.
The code is untouched so this patch will not
cause troubles.
Please apply.
Thanks in advance and Ciao,
Tito
Hi!
I've created a patch to busybox' build system to allow building it in
separate tree in a manner similar to kbuild from kernel version 2.6.
That is, one runs command like
'make O=/build/some/where/for/specific/target/and/options'
and everything is built in this exact directory, provided that it exists.
I understand that applyingc such invasive changes during 'release
candidates' stage of development is at best unwise. So, i'm currently
asking for comments about this patch, starting from whether such thing
is needed at all to whether it coded properly.
'make check' should work now, and one make creates Makefile in build
directory, so one can run 'make' in build directory after that.
One possible caveat is that if we build in some directory other than
source one, the source directory should be 'distclean'ed first.
egor
Scenario:
touch x -- creates plain file name `x'
mkdir x -- exits successefully
libbb/make_directory.c, bb_make_directory(), contains
the following code:
if (mkdir(path, 0777) < 0) {
/* If we failed for any other reason than the directory
* already exists, output a diagnostic and return -1.*/
if (errno != EEXIST) {
fail_msg = "create";
umask(mask);
break;
}
/* Since the directory exists, don't attempt to change
* permissions if it was the full target. Note that
* this is not an error conditon. */
if (!c) {
umask(mask);
return 0;
}
}
The assumption that EEXIST error is due to that the *directory*
already exists is wrong: any file type with that name will cause
this error to be returned. Proper way IMHO will be is to stat()
the path and check whenever this is really a directory. Below
(attached) is a patch to fix this issue.
Hi Erik,
Hi to all,
This is part five of the my_get*id story.
I've tweaked a bit this two functions to make them more flexible,
but this changes will not affect existing code.
Now they work so:
1) my_getpwuid( char *user, uid_t uid, int bufsize)
if bufsize is > 0 char *user cannot be set to NULL
on success username is written on static allocated buffer
on failure uid as string is written to buffer and NULL is returned
if bufsize is = 0 char *user can be set to NULL
on success username is returned
on failure NULL is returned
if bufsize is < 0 char *user can be set to NULL
on success username is returned
on failure an error message is printed and the program exits
2) 1) my_getgrgid( char *group, uid_t uid, int bufsize)
if bufsize is > 0 char *group cannot be set to NULL
on success groupname is written on static allocated buffer
on failure gid as string is written to buffer and NULL is returned
if bufsize is = 0 char *group can be set to NULL
on success groupname is returned
on failure NULL is returned
if bufsize is < 0 char *group can be set to nULL
on success groupname is returned
on failure an error message is printed and the program exits
This changes were needed mainly for my new id applet.
It is somewhat bigger then the previous but matches the behaviour of GNU id
and is capable to handle usernames of whatever length.
BTW: at a first look it seems to me that it will integrate well (with just a few changes)
with the pending patch in patches/id_groups_alias.patch.
The increase in size is balanced by the removal of my_getpwnamegid.c
from libbb as this was used only in previous id applet and by size optimizations
made possible in whoami.c and in passwd.c.
I know that we are in feature freeze but I think that i've tested it enough
(at least I hope so.......).
Hi,
I've spent the half night staring at the devilish my_getpwuid and my_getgrgid functions
trying to find out a way to avoid actual and future potential buffer overflow problems
without breaking existing code.
Finally I've found a not intrusive way to do this that surely doesn't break existing code
and fixes a couple of problems too.
The attached patch:
1) changes the behaviour of my_getpwuid and my_getgrgid to avoid potetntial buffer overflows
2) fixes all occurences of this function calls in tar.c , id.c , ls.c, whoami.c, logger.c, libbb.h.
3) The behaviour of tar, ls and logger is unchanged.
4) The behavior of ps with somewhat longer usernames messing up output is fixed.
5) The only bigger change was the increasing of size of the buffers in id.c to avoid
false negatives (unknown user: xxxxxx) with usernames longer than 8 chars.
The value i used ( 32 chars ) was taken from the tar header ( see gname and uname).
Maybe this buffers can be reduced a bit ( to 16 or whatever ), this is up to you.
6) The increase of size of the binary is not so dramatic:
size busybox
text data bss dec hex filename
239568 2300 36816 278684 4409c busybox
size busybox_fixed
text data bss dec hex filename
239616 2300 36816 278732 440cc busybox
7) The behaviour of whoami changed:
actually it prints out an username cut down to the size of the buffer.
This could be fixed by increasing the size of the buffer as in id.c or
avoid the use of my_getpwuid and use getpwuid directly instead.
Maybe this colud be also remain unchanged......
Please apply if you think it is ok to do so.
The diff applies on today's cvs tarball (2004-08-25).
Thanks in advance,
Ciao,
Tito
Unfortunatelly I've not followed the last two or three weeks commits (new
semester started and so now I rarely have time to fix my personal bridge)
but tonight I synched my tree and immediately noticed a rather nasty bug!
[Using libbb/interface.c:1.24]
# grep eth0 /proc/net/dev | xargs
eth0:311708397 237346 1670 0 1789 1670 0 0 22580308 120297 0 0 0 102 0 0
# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:20:AF:7C:EA:B7
inet addr:10.0.0.1 Bcast:10.0.0.127 Mask:255.255.255.128
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:5 Base address:0x320
All values `ifconfig' is showing are `zeroed' -- I quickly looked at the
last commits I missed and noticed that there were a commit relating to
ifconfig, libbb/interface.c:1.23->1.24 (PatchSet 4338).
I've reversed the patch and now everything is working again. I compared
the get_name's return values from the 1.23 and 1.24 and quickly noticed
that the new revision is leaving `p' right on the sep while the rev 1.23
was leaving it right on the starting of the values...
1-line, 1/3-minute patch attached :-)
with a quick conversion you will see that 132608 == 0x20600
so noticed that the elif will never be matched !
Apparently there was already a try to modify this in CVS which
was reverted (it was plain wrong).
I don't know when __kernel_old_dev_t is needed, but with a 2.6.7
or a 2.6.8 this is __kernel_dev_t wich is needed.
I corrected this with the following patch but maybe older 2.6
still need __kernel_old_dev_t ?
I think this should be corrected before 1.0.
Thanks
Aurel
Hi to all,
This patch is useful for:
1) remove an unused var from extern char *find_real_root_device_name(const char* name)
changing it to extern char *find_real_root_device_name(void).
2) fixes include/libbb.h, coreutils/df.c, util-linux/mount.c and util-linux/umount.c accordingly.
3) fixes a bug, really a false positive, in find_real_root_device_name() that happens if
in the /dev directory exists a link named root (/dev/root) that should be skipped but
is not. This affects applets like df that display wrong results
