124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* pidof implementation for busybox
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under the GPL v2, see the file LICENSE in this tarball.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include <ctype.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "busybox.h"
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#if ENABLE_FEATURE_PIDOF_SINGLE
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#define _SINGLE_COMPL(a) a
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#define SINGLE (1<<0)
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#else
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#define _SINGLE_COMPL(a)
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#define SINGLE (0)
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#endif
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#if ENABLE_FEATURE_PIDOF_OMIT
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#define _OMIT_COMPL(a) a
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#define _OMIT(a) ,a
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#if ENABLE_FEATURE_PIDOF_SINGLE
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#define OMIT (1<<1)
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#else
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#define OMIT (1<<0)
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#endif
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#else
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#define _OMIT_COMPL(a) ""
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#define _OMIT(a)
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#define OMIT (0)
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#define omitted (0)
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#endif
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int pidof_main(int argc, char **argv)
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{
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unsigned n = 0;
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unsigned fail = 1;
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unsigned long int opt;
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#if ENABLE_FEATURE_PIDOF_OMIT
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llist_t *omits = NULL; /* list of pids to omit */
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bb_opt_complementally = _OMIT_COMPL("o::");
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#endif
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/* do unconditional option parsing */
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opt = bb_getopt_ulflags(argc, argv,
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_SINGLE_COMPL("s") _OMIT_COMPL("o:")
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_OMIT(&omits));
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#if ENABLE_FEATURE_PIDOF_OMIT
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/* fill omit list. */
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{
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char getppid_str[32];
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llist_t * omits_p = omits;
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while (omits_p) {
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/* are we asked to exclude the parent's process ID? */
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if (!strncmp(omits_p->data, "%PPID", 5)) {
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llist_pop(&omits_p);
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snprintf(getppid_str, sizeof(getppid_str), "%d", getppid());
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omits_p = llist_add_to(omits_p, getppid_str);
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#if 0
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} else {
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bb_error_msg_and_die("illegal omit pid value (%s)!\n",
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omits_p->data);
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#endif
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}
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omits_p = omits_p->link;
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}
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}
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#endif
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/* Looks like everything is set to go. */
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while(optind < argc) {
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long *pidList;
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long *pl;
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/* reverse the pidlist like GNU pidof does. */
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pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
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for(pl = pidList; *pl > 0; pl++) {
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#if ENABLE_FEATURE_PIDOF_OMIT
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unsigned omitted = 0;
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if (opt & OMIT) {
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llist_t *omits_p = omits;
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while (omits_p)
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if (strtol(omits_p->data, NULL, 10) == *pl) {
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omitted = 1; break;
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} else
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omits_p = omits_p->link;
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}
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#endif
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if (!omitted) {
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if (n) {
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putchar(' ');
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} else {
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n = 1;
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}
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printf("%ld", *pl);
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}
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fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
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if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
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break;
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}
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free(pidList);
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optind++;
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}
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putchar('\n');
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#if ENABLE_FEATURE_PIDOF_OMIT
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if (ENABLE_FEATURE_CLEAN_UP)
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llist_free(omits, NULL);
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#endif
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return fail ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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