*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ * 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?
+ */
-#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>
-#include "busybox.h"
+//kbuild:lib-$(CONFIG_PIDOF) += pidof.o
-#if ENABLE_FEATURE_PIDOF_SINGLE
-#define _SINGLE_COMPL(a) a
-#define SINGLE (1<<0)
-#else
-#define _SINGLE_COMPL(a)
-#define SINGLE (0)
-#endif
+//usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
+//usage:#define pidof_trivial_usage
+//usage: "[OPTIONS] [NAME]..."
+//usage:#define USAGE_PIDOF "\n"
+//usage:#else
+//usage:#define pidof_trivial_usage
+//usage: "[NAME]..."
+//usage:#define USAGE_PIDOF /* none */
+//usage:#endif
+//usage:#define pidof_full_usage "\n\n"
+//usage: "List PIDs of all processes with names that match NAMEs"
+//usage: USAGE_PIDOF
+//usage: IF_FEATURE_PIDOF_SINGLE(
+//usage: "\n -s Show only one PID"
+//usage: )
+//usage: IF_FEATURE_PIDOF_OMIT(
+//usage: "\n -o PID Omit given pid"
+//usage: "\n Use %PPID to omit pid of pidof's parent"
+//usage: )
+//usage:
+//usage:#define pidof_example_usage
+//usage: "$ 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")
-#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
+#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)
+int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int pidof_main(int argc UNUSED_PARAM, char **argv)
{
- unsigned n = 0;
- unsigned fail = 1;
- unsigned long int opt;
+ unsigned first = 1;
+ unsigned 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));
+ opt = getopt32(argv, ""
+ IF_FEATURE_PIDOF_SINGLE ("s")
+ IF_FEATURE_PIDOF_OMIT("o:*", &omits));
#if ENABLE_FEATURE_PIDOF_OMIT
/* fill omit list. */
{
- char getppid_str[32];
- llist_t * omits_p = omits;
- while (omits_p) {
+ 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? */
- if (!strncmp(omits_p->data, "%PPID", 5)) {
- omits_p = llist_free_one(omits_p);
- snprintf(getppid_str, sizeof(getppid_str), "%d", getppid());
- omits_p = llist_add_to(omits_p, getppid_str);
-#if 0
- } else {
- bb_error_msg_and_die("illegal omit pid value (%s)!\n",
- omits_p->data);
-#endif
- }
- omits_p = omits_p->link;
+ omits_p->data = utoa((unsigned)getppid());
}
}
#endif
/* Looks like everything is set to go. */
- while(optind < argc) {
- long *pidList;
- long *pl;
+ 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[optind]));
- for(pl = pidList; *pl > 0; pl++) {
+ pidList = pidlist_reverse(find_pid_by_name(*argv));
+ for (pl = pidList; *pl; pl++) {
#if ENABLE_FEATURE_PIDOF_OMIT
- unsigned omitted = 0;
- if (opt & OMIT) {
+ if (opt & 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;
+ while (omits_p) {
+ if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
+ goto omitting;
+ }
+ omits_p = omits_p->link;
}
- printf("%ld", *pl);
}
- fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
-
- if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
+#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++;
}
- putchar('\n');
+ if (!first)
+ bb_putchar('\n');
#if ENABLE_FEATURE_PIDOF_OMIT
if (ENABLE_FEATURE_CLEAN_UP)
- llist_free(omits);
+ llist_free(omits, NULL);
#endif
- return fail ? EXIT_FAILURE : EXIT_SUCCESS;
+ return first; /* 1 (failure) - no processes found */
}
projects / oweals / busybox.git / blobdiff