First problem: saved_argc was used to calculate the size of the array,
but saved_argc was never initialized. This triggers an immediate heap-
based buffer overflow:
$ skill -c0 -c0 -c0 -c0
Segmentation fault (core dumped)
Second problem: saved_argc was not the upper bound anyway, because one
argument can ENLIST() several times (for example, in parse_namespaces())
and overflow the array as well.
Third problem: integer overflow of the size of the array.
No need to "pid_count++;" because "ENLIST(pid," does it already. Right
now this can trigger a heap-based buffer overflow.
Also, remove the unneeded "pid_count = 0;" (it is static, and
skillsnice_parse() is called only once; and the other *_count variables
are not initialized explicitly either).
The memmove() itself does not move the NULL-terminator, because nargs is
decremented first. Copy how skill_sig_option() does it: decrement nargs
last, and remove the "if (nargs - i)" (we are in "while (i < nargs)").
man getline: "If *lineptr is set to NULL and *n is set 0 before the
call, then getline() will allocate a buffer for storing the line. This
buffer should be freed by the user program even if getline() failed."
Since the VAL macro now requires a 4th parameter, this
commit simply adds the 'info' context structure to it.
In some cases, that context structure needed to become
global, since it was referenced in multiple functions.
Signed-off-by: Jim Warner <james.warner@comcast.net>
With this patch we've completed a progression toward a
standard approach to naming conventions which follows:
* Only functions will begin with that 'procps_' prefix
. ........................................... examples
. procps_vmstat_get ()
. procps_diskstats_select ()
- ----------------------------------------------------
* Exposed structures begin with the module/header name
. ........................................... examples
. struct pids_info
. struct stat_reaped
- ----------------------------------------------------
* Item enumerators begin like structs, but capitalized
. ........................................... examples
. VMSTAT_COMPACT_FAIL
. MEMINFO_DELTA_ACTIVE
[ slabinfo varies slightly due to some item variants ]
. SLABINFO_extra
. SLABS_SIZE_ACTIVE
. SLABNODE_OBJS_PER_SLAB
[ could cure with a prefix of SLABINFO, but too long ]
- ----------------------------------------------------
* Other enumerators work exactly like item enumerators
. ........................................... examples
. PIDS_SORT_ASCEND
. STAT_REAP_CPUS_AND_NODES
- ----------------------------------------------------
* Macros and constants begin just like the enumerators
. ........................................... examples
. #define SLABINFO_GET
. #define DISKSTATS_TYPE_DISK
- ----------------------------------------------------
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ plus we also play catch up on some earlier changes ]
[ that impacted skill.c, after using --enable-skill! ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
I've got nothing to add to the commit message but that
doesn't mean I won't produce perfectly justified text.
Signed-off-by: Jim Warner <james.warner@comcast.net>
The includes used to define a lot of things a library include
should not. It was also a bit messy what was exposed in the library
and what was not.
get_pid_digits -> procps_pid_length and exported correctly
MALLOC attribute move into relevant .c files
NORETURN attribute moved to relevant .c, not used in library
PURE attribute removed, it wasn't used
KLONG/KLF/STRTOUKL were fixed for long, so now just use long
HIDDEN attribute removed. It was for 3 functions. The PROCPS_EXPORT
seems to do the same (opposite) thing.
likely/unlikely removed from most places, its highly debateable
this does anything useful as CPUs have gotten smarter about branches.
Re-arranged the includes, ALL external programs should just #include
<proc/procps.h> then proc/procps.h includes headers for files that
have exported functions. procps.h and the headers it includes should
not use items that are not exportable (e.g. hidden functions or
macros) they go in procps-private.h
skill is one of the older and more unloved programs. It was still
scanning readdir /proc. It now will use the procps library like the
rest of the programs.
Signed-off-by: Craig Small <csmall@enc.com.au>
The first part of fixing skill/snice to use the library instead
of directly readdir()ing /proc which is what it does now.
Remove the kill code from the skill/snice code and put common
elements into lib/signals.c Not 100% sure that is the right
destination instead of a new lib file, but ok for now.
kill shares some parsing logic with skill/snice but mainly
around signal specifications. The "do it" code is very different.
Signed-off-by: Craig Small <csmall@enc.com.au>
Functions related to namespaces were half-in half-out of the
procps library and didn't fit the standard naming scheme.
While struct { long ns[x]} is a bit clunky, its the only way
to "lock in" x. The alternative is to use ns_* variables.
This work was needed before pgrep could be converted.
Procps library previously held functions that were about either
listing or finding signal names. These are not really the right
location for a library about reading procfs.
This patch handles signal related functions in two ways:
For functions purely found in skill, these have been moved back
into this binary as they are used nowhere else.
For functions used across the binaries, these have been moved
into include/signals.h and lib/signals.c. Besides formatting,
these functions are largely the same.
To assist the skill functions, two functions to access the
signal map array have been added to lib/signals.c
If skill was used with a signal number then it would intepret
the command line with last option interpreted twice. This often
confused the program so it just would end up killing nothing.
So this would work:
skill -t pts/0
This would not:
skill -9 -t pts/0
The kill path (in the same file) uses the same logic that has
been introduced here.
References: https://www.freelists.org/post/procps/skill-command-does-not-work-in-debian-7-releases
Signed-off-by: Craig Small <csmall@enc.com.au>
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>
Benno Schulenberg suggested some changes to the help messages
to provide some consistency and clarity for both the users and
translators of procps.
The test needed to be updated as the pmap output changed too.
Signed-off-by: Craig Small <csmall@enc.com.au>
Commit 4359cf0698 restored kill's ability
to kill PID -1. This however left PIDs -2 to -9 (or rather process
groups 2 to 9) still having this problem. The check is now generically
looking for a digit and parses it correctly.
Both the man page and the shell builtin kill mention you can
use PID -1, which means nuke everything you can get at.
Alas this "fun" option was missing and the only way to get
around it was with "kill -HUP -- -1".
This small change means kill -HUP -1 is back for all those
destructive types. The error was introduced when the argument
parser was fixed for other problems.
Thanks to Mike for pointing this out.
Signed-off-by: Craig Small <csmall@enc.com.au>
To assist translators, the help lines are split so that each translation
chunk has one option. This gives bonus of if we add or change an option,
only that option remains untranslated rather than the entire help block.
Reference:
http://www.freelists.org/post/procps/procpsng-for-Translation-Project,1
Signed-off-by: Craig Small <csmall@enc.com.au>
Additional errors resulting from merge request #13 are
being addressed in this commit. They involve two cases
of trailing whitespace and one xwarnx printf type arg.
Reference(s):
http://gitorious.org/procps/procps/merge_requests/13
. earlier build-sys fix
commit e2242cb943
. original merge
commit dd6f24dbed
Signed-off-by: Jim Warner <james.warner@comcast.net>
In the same fashion of pgrep, introduce two new options:
--ns <pid>
- nslist <ns,...>
which allows processes to be filtered by namespace.
Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
For portabiliy, check for program_invocation_name during configure and
define HAVE_PROGRAM_INVOCATION_NAME accordingly. Use of this symbol is
now enclosed with the appropriate #ifdef block.
The symbol program_invocation_name is only used for error message
handling using error(), so it's safe to omit this if it is not
available.
skill.c:340:5: warning: no previous declaration for 'skill_sig_option' [-Wmissing-declarations]
skill.c:460:5: warning: no previous declaration for 'snice_prio_option' [-Wmissing-declarations]
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Bug-Debian: http://bugs.debian.org/688731
kill would not permit negative PIDs and thought they were options. kill
now explicitly checks for unknown options and if they are numeric
assumes they are negative PIDs. The first negative PID stops any
further option processing.
Signed-off-by: Craig Small <csmall@enc.com.au>
If stream status is not checked at the end of execution below problem
would not report error, or non-zero exit code. The uptime is just an
example same was true with all commands of the project.
$ uptime >&- ; echo $?
uptime: write error: Bad file descriptor
1
$ uptime >/dev/full ; echo $?
uptime: write error: No space left on device
1
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Commit 991b8a94f0 took use
getopt_long(), which means the code that is related to earlier
selfmade argument parsing is unnecessary.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Command skill accepted earlier command name as argument. This did
not work since commit 991b8a94f0.
Reported-By: "Anne C. Hanna" <orion@ugcs.caltech.edu>
Bug-Debian: http://bugs.debian.org/659038
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Strings with lower caps & no trailing dots have greater change to
have multiple occurences, meaning less effort for translators, than
strings with them.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
err and warn are BSD format but they are not recommended by library
developers. However their consiseness is useful!
The solution is to use some macros that create xerr etc which then
just map to the error() function. The next problem is error() uses
program_invocation_name so we set this to program_invovation_short_name
This is a global set but seems to be the convention (or at least errors
are on the short name only) used everywhere else.
Add the following three functions to most of the commands.
setlocale (LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
Reference: http://www.freelists.org/post/procps/backporting,1
Reported-by: Jim Warner <james.warner@comcast.net>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The patch also removes fixed size of input, which can be problematic.
I do not know how long the string `yes' might be in all of the worlds
languages.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Pretty much all of the warnings where caused by some of the previous
patches, and they became visible with gcc when compiling with;
CFLAGS="-O -g -ggdb -Wall -Wextra -pedantic -Wstrict-overflow
-Wformat -Wswitch-default -Wswitch-enum -Wsync-nand
-Wredundant-decls -Wuninitialized"
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
