140 lines
3.8 KiB
C
140 lines
3.8 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 GPLv2, see file LICENSE in this source tree.
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*/
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//config:config PIDOF
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//config: bool "pidof"
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//config: default y
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//config: help
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//config: Pidof finds the process id's (pids) of the named programs. It prints
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//config: those id's on the standard output.
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//config:
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//config:config FEATURE_PIDOF_SINGLE
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//config: bool "Enable argument for single shot (-s)"
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//config: default y
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//config: depends on PIDOF
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//config: help
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//config: Support argument '-s' for returning only the first pid found.
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//config:
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//config:config FEATURE_PIDOF_OMIT
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//config: bool "Enable argument for omitting pids (-o)"
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//config: default y
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//config: depends on PIDOF
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//config: help
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//config: Support argument '-o' for omitting the given pids in output.
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//config: The special pid %PPID can be used to name the parent process
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//config: of the pidof, in other words the calling shell or shell script.
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//applet:IF_PIDOF(APPLET(pidof, BB_DIR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_PIDOF) += pidof.o
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//usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
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//usage:#define pidof_trivial_usage
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//usage: "[OPTIONS] [NAME]..."
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//usage:#define USAGE_PIDOF "\n"
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//usage:#else
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//usage:#define pidof_trivial_usage
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//usage: "[NAME]..."
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//usage:#define USAGE_PIDOF /* none */
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//usage:#endif
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//usage:#define pidof_full_usage "\n\n"
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//usage: "List PIDs of all processes with names that match NAMEs"
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//usage: USAGE_PIDOF
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//usage: IF_FEATURE_PIDOF_SINGLE(
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//usage: "\n -s Show only one PID"
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//usage: )
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//usage: IF_FEATURE_PIDOF_OMIT(
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//usage: "\n -o PID Omit given pid"
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//usage: "\n Use %PPID to omit pid of pidof's parent"
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//usage: )
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//usage:
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//usage:#define pidof_example_usage
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//usage: "$ pidof init\n"
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//usage: "1\n"
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//usage: IF_FEATURE_PIDOF_OMIT(
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//usage: "$ pidof /bin/sh\n20351 5973 5950\n")
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//usage: IF_FEATURE_PIDOF_OMIT(
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//usage: "$ pidof /bin/sh -o %PPID\n20351 5950")
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#include "libbb.h"
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enum {
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IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
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IF_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,)
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OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
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OPT_OMIT = IF_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0,
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};
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int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int pidof_main(int argc UNUSED_PARAM, char **argv)
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{
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unsigned first = 1;
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unsigned 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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#endif
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/* do unconditional option parsing */
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opt = getopt32(argv, ""
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IF_FEATURE_PIDOF_SINGLE ("s")
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IF_FEATURE_PIDOF_OMIT("o:*", &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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llist_t *omits_p = omits;
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while (1) {
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omits_p = llist_find_str(omits_p, "%PPID");
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if (!omits_p)
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break;
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/* are we asked to exclude the parent's process ID? */
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omits_p->data = utoa((unsigned)getppid());
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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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argv += optind;
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while (*argv) {
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pid_t *pidList;
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pid_t *pl;
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/* reverse the pidlist like GNU pidof does. */
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pidList = pidlist_reverse(find_pid_by_name(*argv));
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for (pl = pidList; *pl; pl++) {
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#if ENABLE_FEATURE_PIDOF_OMIT
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if (opt & OPT_OMIT) {
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llist_t *omits_p = omits;
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while (omits_p) {
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if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
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goto omitting;
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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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printf(" %u" + first, (unsigned)*pl);
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first = 0;
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if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
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break;
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#if ENABLE_FEATURE_PIDOF_OMIT
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omitting: ;
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#endif
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}
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free(pidList);
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argv++;
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}
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if (!first)
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bb_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 first; /* 1 (failure) - no processes found */
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}
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