[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * pidof implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under the GPL v2, see the file LICENSE in this tarball.
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| 8 | */
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| 9 |
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| 10 | #include "busybox.h"
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| 11 | #include <stdio.h>
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| 12 | #include <stdlib.h>
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| 13 | #include <errno.h>
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| 14 | #include <unistd.h>
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| 15 | #include <signal.h>
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| 16 | #include <ctype.h>
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| 17 | #include <string.h>
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| 18 | #include <sys/types.h>
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| 19 | #include <unistd.h>
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| 20 |
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| 21 | #if ENABLE_FEATURE_PIDOF_SINGLE
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| 22 | #define _SINGLE_COMPL(a) a
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| 23 | #define SINGLE (1<<0)
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| 24 | #else
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| 25 | #define _SINGLE_COMPL(a)
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| 26 | #define SINGLE (0)
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| 27 | #endif
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| 28 |
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| 29 | #if ENABLE_FEATURE_PIDOF_OMIT
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| 30 | #define _OMIT_COMPL(a) a
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| 31 | #define _OMIT(a) ,a
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| 32 | #if ENABLE_FEATURE_PIDOF_SINGLE
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| 33 | #define OMIT (1<<1)
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| 34 | #else
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| 35 | #define OMIT (1<<0)
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| 36 | #endif
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| 37 | #else
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| 38 | #define _OMIT_COMPL(a) ""
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| 39 | #define _OMIT(a)
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| 40 | #define OMIT (0)
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| 41 | #define omitted (0)
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| 42 | #endif
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| 43 |
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| 44 | int pidof_main(int argc, char **argv)
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| 45 | {
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| 46 | unsigned n = 0;
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| 47 | unsigned fail = 1;
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| 48 | unsigned long int opt;
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| 49 | #if ENABLE_FEATURE_PIDOF_OMIT
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| 50 | llist_t *omits = NULL; /* list of pids to omit */
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| 51 | bb_opt_complementally = _OMIT_COMPL("o::");
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| 52 | #endif
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| 53 |
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| 54 | /* do unconditional option parsing */
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| 55 | opt = bb_getopt_ulflags(argc, argv,
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| 56 | _SINGLE_COMPL("s") _OMIT_COMPL("o:")
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| 57 | _OMIT(&omits));
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| 58 |
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| 59 | #if ENABLE_FEATURE_PIDOF_OMIT
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| 60 | /* fill omit list. */
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| 61 | {
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| 62 | char getppid_str[32];
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| 63 | llist_t * omits_p = omits;
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| 64 | while (omits_p) {
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| 65 | /* are we asked to exclude the parent's process ID? */
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| 66 | if (!strncmp(omits_p->data, "%PPID", 5)) {
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| 67 | llist_pop(&omits_p);
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| 68 | snprintf(getppid_str, sizeof(getppid_str), "%d", getppid());
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| 69 | llist_add_to(&omits_p, getppid_str);
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| 70 | }
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| 71 | omits_p = omits_p->link;
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| 72 | }
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| 73 | }
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| 74 | #endif
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| 75 | /* Looks like everything is set to go. */
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| 76 | while(optind < argc) {
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| 77 | long *pidList;
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| 78 | long *pl;
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| 79 |
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| 80 | /* reverse the pidlist like GNU pidof does. */
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| 81 | pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
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| 82 | for(pl = pidList; *pl > 0; pl++) {
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| 83 | #if ENABLE_FEATURE_PIDOF_OMIT
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| 84 | unsigned omitted = 0;
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| 85 | if (opt & OMIT) {
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| 86 | llist_t *omits_p = omits;
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| 87 | while (omits_p)
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| 88 | if (strtol(omits_p->data, NULL, 10) == *pl) {
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| 89 | omitted = 1; break;
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| 90 | } else
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| 91 | omits_p = omits_p->link;
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| 92 | }
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| 93 | #endif
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| 94 | if (!omitted) {
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| 95 | if (n) {
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| 96 | putchar(' ');
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| 97 | } else {
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| 98 | n = 1;
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| 99 | }
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| 100 | printf("%ld", *pl);
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| 101 | }
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| 102 | fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
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| 103 |
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| 104 | if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
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| 105 | break;
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| 106 | }
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| 107 | free(pidList);
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| 108 | optind++;
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| 109 | }
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| 110 | putchar('\n');
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| 111 |
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| 112 | #if ENABLE_FEATURE_PIDOF_OMIT
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| 113 | if (ENABLE_FEATURE_CLEAN_UP)
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| 114 | llist_free(omits, NULL);
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| 115 | #endif
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| 116 | return fail ? EXIT_FAILURE : EXIT_SUCCESS;
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| 117 | }
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