busybox/procps/pidof.c
Denys Vlasenko 237bedd499 getopt32: add new syntax of 'o:+' and 'o:*' for -o NUM and -o LIST
In many cases, this aqllows to drop use of opt_complementary.
Approximately -400 bytes:

function                                             old     new   delta
getopt32                                            1423    1502     +79
opt_string                                            17      18      +1
OPT_STR                                               24      25      +1
uniq_main                                            416     406     -10
timeout_main                                         279     269     -10
sulogin_main                                         270     260     -10
readprofile_main                                    1825    1815     -10
ps_main                                              543     533     -10
pidof_main                                           245     235     -10
pgrep_main                                           611     601     -10
od_main                                             2600    2590     -10
mkfs_minix_main                                     2684    2674     -10
mkfs_ext2_main                                      2603    2593     -10
microcom_main                                        712     702     -10
makemime_main                                        315     305     -10
ionice_main                                          282     272     -10
inetd_main                                          2074    2064     -10
ifplugd_main                                        1144    1134     -10
halt_main                                            353     343     -10
getopt_main                                          636     626     -10
fdisk_main                                          2854    2844     -10
env_main                                             206     196     -10
dmesg_main                                           319     309     -10
conspy_main                                         1214    1204     -10
awk_main                                             981     971     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220)         Total: -139 bytes
   text	   data	    bss	    dec	    hex	filename
 919373	    906	  14060	 934339	  e41c3	busybox_old
 918969	    906	  14060	 933935	  e402f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-07-06 21:58:02 +02:00

114 lines
2.9 KiB
C

/* vi: set sw=4 ts=4: */
/*
* pidof implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
//usage:#define pidof_trivial_usage
//usage: "[OPTIONS] [NAME]..."
//usage:#define USAGE_PIDOF "\n"
//usage:#else
//usage:#define pidof_trivial_usage
//usage: "[NAME]..."
//usage:#define USAGE_PIDOF /* none */
//usage:#endif
//usage:#define pidof_full_usage "\n\n"
//usage: "List PIDs of all processes with names that match NAMEs"
//usage: USAGE_PIDOF
//usage: IF_FEATURE_PIDOF_SINGLE(
//usage: "\n -s Show only one PID"
//usage: )
//usage: IF_FEATURE_PIDOF_OMIT(
//usage: "\n -o PID Omit given pid"
//usage: "\n Use %PPID to omit pid of pidof's parent"
//usage: )
//usage:
//usage:#define pidof_example_usage
//usage: "$ pidof init\n"
//usage: "1\n"
//usage: IF_FEATURE_PIDOF_OMIT(
//usage: "$ pidof /bin/sh\n20351 5973 5950\n")
//usage: IF_FEATURE_PIDOF_OMIT(
//usage: "$ pidof /bin/sh -o %PPID\n20351 5950")
#include "libbb.h"
enum {
IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
IF_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,)
OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
OPT_OMIT = IF_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0,
};
int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int pidof_main(int argc UNUSED_PARAM, char **argv)
{
unsigned first = 1;
unsigned opt;
#if ENABLE_FEATURE_PIDOF_OMIT
llist_t *omits = NULL; /* list of pids to omit */
#endif
/* do unconditional option parsing */
opt = getopt32(argv, ""
IF_FEATURE_PIDOF_SINGLE ("s")
IF_FEATURE_PIDOF_OMIT("o:*", &omits));
#if ENABLE_FEATURE_PIDOF_OMIT
/* fill omit list. */
{
llist_t *omits_p = omits;
while (1) {
omits_p = llist_find_str(omits_p, "%PPID");
if (!omits_p)
break;
/* are we asked to exclude the parent's process ID? */
omits_p->data = utoa((unsigned)getppid());
}
}
#endif
/* Looks like everything is set to go. */
argv += optind;
while (*argv) {
pid_t *pidList;
pid_t *pl;
/* reverse the pidlist like GNU pidof does. */
pidList = pidlist_reverse(find_pid_by_name(*argv));
for (pl = pidList; *pl; pl++) {
#if ENABLE_FEATURE_PIDOF_OMIT
if (opt & OPT_OMIT) {
llist_t *omits_p = omits;
while (omits_p) {
if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
goto omitting;
}
omits_p = omits_p->link;
}
}
#endif
printf(" %u" + first, (unsigned)*pl);
first = 0;
if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
break;
#if ENABLE_FEATURE_PIDOF_OMIT
omitting: ;
#endif
}
free(pidList);
argv++;
}
if (!first)
bb_putchar('\n');
#if ENABLE_FEATURE_PIDOF_OMIT
if (ENABLE_FEATURE_CLEAN_UP)
llist_free(omits, NULL);
#endif
return first; /* 1 (failure) - no processes found */
}