*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under the GPL version 2, see the file LICENSE in this tarball.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+//config:config PIDOF
+//config: bool "pidof (6.6 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-$(CONFIG_PIDOF) += pidof.o
+
+//usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
+//usage:#define pidof_trivial_usage
+//usage: "[OPTIONS] [NAME]..."
+//usage:#define USAGE_PIDOF "\n"
+//usage:#else
+//usage:#define pidof_trivial_usage
+//usage: "[NAME]..."
+//usage:#define USAGE_PIDOF /* none */
+//usage:#endif
+//usage:#define pidof_full_usage "\n\n"
+//usage: "List PIDs of all processes with names that match NAMEs"
+//usage: USAGE_PIDOF
+//usage: IF_FEATURE_PIDOF_SINGLE(
+//usage: "\n -s Show only one PID"
+//usage: )
+//usage: IF_FEATURE_PIDOF_OMIT(
+//usage: "\n -o PID Omit given pid"
+//usage: "\n Use %PPID to omit pid of pidof's parent"
+//usage: )
+//usage:
+//usage:#define pidof_example_usage
+//usage: "$ 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"
enum {
- USE_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
- USE_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,)
- OPT_SINGLE = USE_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
- OPT_OMIT = USE_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0,
+ 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, char **argv)
+int pidof_main(int argc UNUSED_PARAM, char **argv)
{
unsigned first = 1;
unsigned opt;
#if ENABLE_FEATURE_PIDOF_OMIT
- char ppid_str[sizeof(int)*3 + 1];
llist_t *omits = NULL; /* list of pids to omit */
- opt_complementary = "o::";
#endif
/* do unconditional option parsing */
opt = getopt32(argv, ""
- USE_FEATURE_PIDOF_SINGLE ("s")
- USE_FEATURE_PIDOF_OMIT("o:", &omits));
+ IF_FEATURE_PIDOF_SINGLE ("s")
+ IF_FEATURE_PIDOF_OMIT("o:*", &omits));
#if ENABLE_FEATURE_PIDOF_OMIT
/* fill omit list. */
{
llist_t *omits_p = omits;
- while (omits_p) {
+ 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 (strcmp(omits_p->data, "%PPID") == 0) {
- sprintf(ppid_str, "%u", (unsigned)getppid());
- omits_p->data = ppid_str;
- }
- omits_p = omits_p->link;
+ omits_p->data = utoa((unsigned)getppid());
}
}
#endif
if (opt & OPT_OMIT) {
llist_t *omits_p = omits;
while (omits_p) {
- if (xatoul(omits_p->data) == *pl) {
+ if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
goto omitting;
}
omits_p = omits_p->link;