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/* vi: set sw=4 ts=4: */
/*
* pidof implementation for busybox
*
* 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 "busybox.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#if ENABLE_FEATURE_PIDOF_SINGLE
#define _SINGLE_COMPL(a) a
#define SINGLE (1<<0)
#else
#define _SINGLE_COMPL(a)
#define SINGLE (0)
#endif
#if ENABLE_FEATURE_PIDOF_OMIT
#define _OMIT_COMPL(a) a
#define _OMIT(a) ,a
#if ENABLE_FEATURE_PIDOF_SINGLE
#define OMIT (1<<1)
#else
#define OMIT (1<<0)
#endif
#else
#define _OMIT_COMPL(a) ""
#define _OMIT(a)
#define OMIT (0)
#define omitted (0)
#endif
int pidof_main(int argc, char **argv)
{
unsigned n = 0;
unsigned fail = 1;
unsigned long int opt;
#if ENABLE_FEATURE_PIDOF_OMIT
llist_t *omits = NULL; /* list of pids to omit */
bb_opt_complementally = _OMIT_COMPL("o::");
#endif
/* do unconditional option parsing */
opt = bb_getopt_ulflags(argc, argv,
_SINGLE_COMPL("s") _OMIT_COMPL("o:")
_OMIT(&omits));
#if ENABLE_FEATURE_PIDOF_OMIT
/* fill omit list. */
{
char getppid_str[32];
llist_t * omits_p = omits;
while (omits_p) {
/* are we asked to exclude the parent's process ID? */
if (!strncmp(omits_p->data, "%PPID", 5)) {
llist_pop(&omits_p);
snprintf(getppid_str, sizeof(getppid_str), "%d", getppid());
llist_add_to(&omits_p, getppid_str);
}
omits_p = omits_p->link;
}
}
#endif
/* Looks like everything is set to go. */
while(optind < argc) {
long *pidList;
long *pl;
/* reverse the pidlist like GNU pidof does. */
pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
for(pl = pidList; *pl > 0; pl++) {
#if ENABLE_FEATURE_PIDOF_OMIT
unsigned omitted = 0;
if (opt & OMIT) {
llist_t *omits_p = omits;
while (omits_p)
if (strtol(omits_p->data, NULL, 10) == *pl) {
omitted = 1; break;
} else
omits_p = omits_p->link;
}
#endif
if (!omitted) {
if (n) {
putchar(' ');
} else {
n = 1;
}
printf("%ld", *pl);
}
fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
break;
}
free(pidList);
optind++;
}
putchar('\n');
#if ENABLE_FEATURE_PIDOF_OMIT
if (ENABLE_FEATURE_CLEAN_UP)
llist_free(omits, NULL);
#endif
return fail ? EXIT_FAILURE : EXIT_SUCCESS;
}
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