mirror of
https://github.com/sheumann/hush.git
synced 2024-12-28 22:30:05 +00:00
dc757aa16c
function old new delta bb_basename - 26 +26 sv_main 1226 1225 -1 passwd_main 1985 1983 -2 showdirs 482 478 -4 sendCgi 1811 1807 -4 make_device 1354 1350 -4 handleIncoming 2443 2439 -4 func_name 82 78 -4 service_name 2292 2285 -7 main 909 901 -8 cmp_main 555 547 -8 test_main 434 422 -12 act 228 216 -12 find_pair 180 164 -16 rmmod_main 298 280 -18 find_pid_by_name 156 134 -22 modprobe_main 1606 1576 -30 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/16 up/down: 26/-156) Total: -130 bytes text data bss dec hex filename 734933 3028 14400 752361 b7ae9 busybox_old 734801 3028 14400 752229 b7a65 busybox_unstripped
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
/*
|
|
In Linux we have three ways to determine "process name":
|
|
1. /proc/PID/stat has "...(name)...", among other things. It's so-called "comm" field.
|
|
2. /proc/PID/cmdline's first NUL-terminated string. It's argv[0] from exec syscall.
|
|
3. /proc/PID/exe symlink. Points to the running executable file.
|
|
|
|
kernel threads:
|
|
comm: thread name
|
|
cmdline: empty
|
|
exe: <readlink fails>
|
|
|
|
executable
|
|
comm: first 15 chars of base name
|
|
(if executable is a symlink, then first 15 chars of symlink name are used)
|
|
cmdline: argv[0] from exec syscall
|
|
exe: points to executable (resolves symlink, unlike comm)
|
|
|
|
script (an executable with #!/path/to/interpreter):
|
|
comm: first 15 chars of script's base name (symlinks are not resolved)
|
|
cmdline: /path/to/interpreter (symlinks are not resolved)
|
|
(script name is in argv[1], args are pushed into argv[2] etc)
|
|
exe: points to interpreter's executable (symlinks are resolved)
|
|
|
|
If FEATURE_PREFER_APPLETS=y (and more so if FEATURE_SH_STANDALONE=y),
|
|
some commands started from busybox shell, xargs or find are started by
|
|
execXXX("/proc/self/exe", applet_name, params....)
|
|
and therefore comm field contains "exe".
|
|
*/
|
|
|
|
/* find_pid_by_name()
|
|
*
|
|
* Modified by Vladimir Oleynik for use with libbb/procps.c
|
|
* This finds the pid of the specified process.
|
|
* Currently, it's implemented by rummaging through
|
|
* the proc filesystem.
|
|
*
|
|
* Returns a list of all matching PIDs
|
|
* It is the caller's duty to free the returned pidlist.
|
|
*/
|
|
pid_t* find_pid_by_name(const char* procName)
|
|
{
|
|
pid_t* pidList;
|
|
int i = 0;
|
|
procps_status_t* p = NULL;
|
|
|
|
pidList = xmalloc(sizeof(*pidList));
|
|
while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGV0))) {
|
|
if (
|
|
/* we require comm to match and to not be truncated */
|
|
/* in Linux, if comm is 15 chars, it may be a truncated
|
|
* name, so we don't allow that to match */
|
|
(!p->comm[sizeof(p->comm)-2] && strcmp(p->comm, procName) == 0)
|
|
/* or we require argv0 to match (essential for matching reexeced /proc/self/exe)*/
|
|
|| (p->argv0 && strcmp(bb_basename(p->argv0), procName) == 0)
|
|
/* TOOD: we can also try exe, do we want that? */
|
|
) {
|
|
pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
|
|
pidList[i++] = p->pid;
|
|
}
|
|
}
|
|
|
|
pidList[i] = 0;
|
|
return pidList;
|
|
}
|
|
|
|
pid_t *pidlist_reverse(pid_t *pidList)
|
|
{
|
|
int i = 0;
|
|
while (pidList[i])
|
|
i++;
|
|
if (--i >= 0) {
|
|
pid_t k;
|
|
int j;
|
|
for (j = 0; i > j; i--, j++) {
|
|
k = pidList[i];
|
|
pidList[i] = pidList[j];
|
|
pidList[j] = k;
|
|
}
|
|
}
|
|
return pidList;
|
|
}
|