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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-09-29 22:26:01 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-09-29 22:26:01 +0000
commit72e1c89d971aa2e37abf705c6a01f002deac09b8 (patch)
tree6edb25e260701f9f6e49769e4bb7e31e7e2e6063 /procps
parent2450e4ba44707a64920ea6c9276930a1210e76cc (diff)
downloadbusybox-72e1c89d971aa2e37abf705c6a01f002deac09b8.tar.gz
busybox-72e1c89d971aa2e37abf705c6a01f002deac09b8.tar.bz2
pgrep,pkill: new applets by Loic Grenie <loic.grenie@gmail.com>
Diffstat (limited to 'procps')
-rw-r--r--procps/Config.in12
-rw-r--r--procps/Kbuild2
-rw-r--r--procps/kill.c48
-rw-r--r--procps/pgrep.c136
4 files changed, 172 insertions, 26 deletions
diff --git a/procps/Config.in b/procps/Config.in
index 2bd3cd245..7e7ee7922 100644
--- a/procps/Config.in
+++ b/procps/Config.in
@@ -49,6 +49,12 @@ config NMETER
help
Prints selected system stats continuously, one line per update.
+config PGREP
+ bool "pgrep"
+ default n
+ help
+ Look for processes by name.
+
config PIDOF
bool "pidof"
default n
@@ -72,6 +78,12 @@ config FEATURE_PIDOF_OMIT
The special pid %PPID can be used to name the parent process
of the pidof, in other words the calling shell or shell script.
+config PKILL
+ bool "pkill"
+ default n
+ help
+ Send signals to processes by name.
+
config PS
bool "ps"
default n
diff --git a/procps/Kbuild b/procps/Kbuild
index c75be291b..8e62fdfa6 100644
--- a/procps/Kbuild
+++ b/procps/Kbuild
@@ -10,6 +10,8 @@ lib-$(CONFIG_FUSER) += fuser.o
lib-$(CONFIG_KILL) += kill.o
lib-$(CONFIG_ASH) += kill.o # used for built-in kill by ash
lib-$(CONFIG_NMETER) += nmeter.o
+lib-$(CONFIG_PGREP) += pgrep.o
+lib-$(CONFIG_PKILL) += pgrep.o
lib-$(CONFIG_PIDOF) += pidof.o
lib-$(CONFIG_PS) += ps.o
lib-$(CONFIG_RENICE) += renice.o
diff --git a/procps/kill.c b/procps/kill.c
index 892a798c5..961f8cb14 100644
--- a/procps/kill.c
+++ b/procps/kill.c
@@ -58,33 +58,29 @@ int kill_main(int argc, char **argv)
if (arg[1] == 'l' && arg[2] == '\0') {
if (argc == 1) {
/* Print the whole signal list */
- for (signo = 1; signo < 32; signo++) {
- const char *name = get_signame(signo);
- if (!isdigit(name[0]))
- puts(name);
- }
- } else { /* -l <sig list> */
- while ((arg = *++argv)) {
- if (isdigit(arg[0])) {
- signo = bb_strtou(arg, NULL, 10);
- if (errno) {
- bb_error_msg("unknown signal '%s'", arg);
- return EXIT_FAILURE;
- }
- /* Exitcodes >= 0x80 are to be treated
- * as "killed by signal (exitcode & 0x7f)" */
- puts(get_signame(signo & 0x7f));
- /* TODO: 'bad' signal# - coreutils says:
- * kill: 127: invalid signal
- * we just print "127" instead */
- } else {
- signo = get_signum(arg);
- if (signo < 0) {
- bb_error_msg("unknown signal '%s'", arg);
- return EXIT_FAILURE;
- }
- printf("%d\n", signo);
+ print_signames_and_exit();
+ }
+ /* -l <sig list> */
+ while ((arg = *++argv)) {
+ if (isdigit(arg[0])) {
+ signo = bb_strtou(arg, NULL, 10);
+ if (errno) {
+ bb_error_msg("unknown signal '%s'", arg);
+ return EXIT_FAILURE;
+ }
+ /* Exitcodes >= 0x80 are to be treated
+ * as "killed by signal (exitcode & 0x7f)" */
+ puts(get_signame(signo & 0x7f));
+ /* TODO: 'bad' signal# - coreutils says:
+ * kill: 127: invalid signal
+ * we just print "127" instead */
+ } else {
+ signo = get_signum(arg);
+ if (signo < 0) {
+ bb_error_msg("unknown signal '%s'", arg);
+ return EXIT_FAILURE;
}
+ printf("%d\n", signo);
}
}
/* If they specified -l, we are all done */
diff --git a/procps/pgrep.c b/procps/pgrep.c
new file mode 100644
index 000000000..3bf087f28
--- /dev/null
+++ b/procps/pgrep.c
@@ -0,0 +1,136 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini pgrep/pkill implementation for busybox
+ *
+ * Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com>
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#include <getopt.h>
+
+#include "libbb.h"
+#include "xregex.h"
+
+/* Idea taken from kill.c */
+#define pgrep (ENABLE_PGREP && applet_name[1] == 'g')
+#define pkill (ENABLE_PKILL && applet_name[1] == 'k')
+
+enum {
+ /* "vlfxon" */
+ PGREPOPTBIT_V = 0, /* must be first, we need OPT_INVERT = 0/1 */
+ PGREPOPTBIT_L,
+ PGREPOPTBIT_F,
+ PGREPOPTBIT_X,
+ PGREPOPTBIT_O,
+ PGREPOPTBIT_N,
+};
+
+#define OPT_INVERT (opt & (1 << PGREPOPTBIT_V))
+#define OPT_LIST (opt & (1 << PGREPOPTBIT_L))
+#define OPT_FULL (opt & (1 << PGREPOPTBIT_F))
+#define OPT_ANCHOR (opt & (1 << PGREPOPTBIT_X))
+#define OPT_FIRST (opt & (1 << PGREPOPTBIT_O))
+#define OPT_LAST (opt & (1 << PGREPOPTBIT_N))
+
+static void act(unsigned pid, char *cmd, int signo, unsigned opt)
+{
+ if (pgrep) {
+ if (OPT_LIST)
+ printf("%d %s\n", pid, cmd);
+ else
+ printf("%d\n", pid);
+ } else
+ kill(pid, signo);
+}
+
+int pgrep_main(int argc, char **argv);
+int pgrep_main(int argc, char **argv)
+{
+ unsigned pid = getpid();
+ int signo = SIGTERM;
+ unsigned opt;
+ int scan_mask = PSSCAN_COMM;
+ char *first_arg;
+ int first_arg_idx;
+ int matched_pid;
+ char *cmd_last;
+ procps_status_t *proc;
+ /* These are initialized to 0 */
+ struct {
+ regex_t re_buffer;
+ regmatch_t re_match[1];
+ } Z;
+#define re_buffer (Z.re_buffer)
+#define re_match (Z.re_match )
+
+ memset(&Z, 0, sizeof(Z));
+
+ /* We must avoid interpreting -NUM (signal num) as an option */
+ first_arg_idx = 1;
+ while (1) {
+ first_arg = argv[first_arg_idx];
+ if (!first_arg)
+ break;
+ if (first_arg[0] != '-' || first_arg[1] < 'a' || first_arg[1] > 'z') {
+ argv[first_arg_idx] = NULL;
+ break;
+ }
+ first_arg_idx++;
+ }
+ opt = getopt32(argv, "vlfxon");
+ argv[first_arg_idx] = first_arg;
+
+ argv += optind;
+ //argc -= optind; - unused anyway
+ if (OPT_FULL)
+ scan_mask |= PSSCAN_ARGVN;
+
+ if (pkill) {
+ if (OPT_LIST) /* -l: print the whole signal list */
+ print_signames_and_exit();
+ if (first_arg && first_arg[0] == '-') {
+ signo = get_signum(&first_arg[1]);
+ if (signo < 0) /* || signo > MAX_SIGNUM ? */
+ bb_error_msg_and_die("bad signal name '%s'", &first_arg[1]);
+ argv++;
+ }
+ }
+
+ /* One pattern is required */
+ if (!argv[0] || argv[1])
+ bb_show_usage();
+
+ xregcomp(&re_buffer, argv[0], 0);
+ matched_pid = 0;
+ cmd_last = NULL;
+ proc = NULL;
+ while ((proc = procps_scan(proc, scan_mask)) != NULL) {
+ char *cmd;
+ if (proc->pid == pid)
+ continue;
+ cmd = proc->argv0;
+ if (!cmd)
+ cmd = proc->comm;
+ /* NB: OPT_INVERT is always 0 or 1 */
+ if ((regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
+ && (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == strlen(cmd)))) ^ OPT_INVERT
+ ) {
+ matched_pid = proc->pid;
+ if (OPT_LAST) {
+ free(cmd_last);
+ cmd_last = xstrdup(cmd_last);
+ continue;
+ }
+ act(proc->pid, cmd, signo, opt);
+ if (OPT_FIRST)
+ break;
+ }
+ }
+ if (cmd_last) {
+ act(matched_pid, cmd_last, signo, opt);
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(cmd_last);
+ }
+ return matched_pid == 0; /* return 1 if no processes listed/signaled */
+}