/*
* pidof implementation for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
- * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//config:config PIDOF
+//config: bool "pidof (6.3 kb)"
+//config: default y
+//config: help
+//config: Pidof finds the process id's (pids) of the named programs. It prints
+//config: those id's on the standard output.
+//config:
+//config:config FEATURE_PIDOF_SINGLE
+//config: bool "Enable single shot (-s)"
+//config: default y
+//config: depends on PIDOF
+//config: help
+//config: Support '-s' for returning only the first pid found.
+//config:
+//config:config FEATURE_PIDOF_OMIT
+//config: bool "Enable omitting pids (-o PID)"
+//config: default y
+//config: depends on PIDOF
+//config: help
+//config: Support '-o PID' for omitting the given pid(s) in output.
+//config: The special pid %PPID can be used to name the parent process
+//config: of the pidof, in other words the calling shell or shell script.
+
+//applet:IF_PIDOF(APPLET(pidof, BB_DIR_BIN, BB_SUID_DROP))
+/* can't be noexec: can find _itself_ under wrong name, since after fork only,
+ * /proc/PID/cmdline and comm are wrong! Can fix comm (prctl(PR_SET_NAME)),
+ * but cmdline?
*/
+//kbuild:lib-$(CONFIG_PIDOF) += pidof.o
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <ctype.h>
-#include <string.h>
-#include <unistd.h>
-#include "busybox.h"
+//usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
+//usage:#define pidof_trivial_usage
+//usage: "[OPTIONS] [NAME]..."
+//usage:#define USAGE_PIDOF "\n"
+//usage:#else
+//usage:#define pidof_trivial_usage
+//usage: "[NAME]..."
+//usage:#define USAGE_PIDOF /* none */
+//usage:#endif
+//usage:#define pidof_full_usage "\n\n"
+//usage: "List PIDs of all processes with names that match NAMEs"
+//usage: USAGE_PIDOF
+//usage: IF_FEATURE_PIDOF_SINGLE(
+//usage: "\n -s Show only one PID"
+//usage: )
+//usage: IF_FEATURE_PIDOF_OMIT(
+//usage: "\n -o PID Omit given pid"
+//usage: "\n Use %PPID to omit pid of pidof's parent"
+//usage: )
+//usage:
+//usage:#define pidof_example_usage
+//usage: "$ 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"
-extern int pidof_main(int argc, char **argv)
+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)
{
- int opt, n = 0;
- int single_flag = 0;
- int fail = 1;
+ 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));
- /* do normal option parsing */
- while ((opt = getopt(argc, argv, "s")) > 0) {
- switch (opt) {
- case 's':
- single_flag = 1;
+#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;
- default:
- show_usage();
+ /* 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;
- /* Looks like everything is set to go. */
- while(optind < argc) {
- long* pidList;
-
- pidList = find_pid_by_name(argv[optind]);
- for(; *pidList > 0; pidList++) {
- printf("%s%ld", (n++ ? " " : ""), (long)*pidList);
- fail = 0;
- if (single_flag)
+ /* 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);
- optind++;
-
+ argv++;
}
- printf("\n");
+ if (!first)
+ bb_putchar('\n');
- return fail ? EXIT_FAILURE : EXIT_SUCCESS;
+#if ENABLE_FEATURE_PIDOF_OMIT
+ if (ENABLE_FEATURE_CLEAN_UP)
+ llist_free(omits, NULL);
+#endif
+ return first; /* 1 (failure) - no processes found */
}
projects / oweals / busybox.git / blobdiff