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authorDenys Vlasenko <vda.linux@googlemail.com>2009-07-05 22:00:12 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-07-05 22:00:12 (GMT)
commit57dc5345e2f30eb990722be45449dcae1b15a1ad (patch)
treefb5c52bbf5f36ea7ae9c774122ee4065daf177d7
parent666e1d3978ebd2b72b18333f4face0e10cc816ba (diff)
downloadbusybox-57dc5345e2f30eb990722be45449dcae1b15a1ad.tar.gz
busybox-57dc5345e2f30eb990722be45449dcae1b15a1ad.tar.bz2
pgrep/pkill: support -s and -P options
function old new delta pgrep_main 510 580 +70 packed_usage 26575 26616 +41 act 234 236 +2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/0 up/down: 113/0) Total: 113 bytes Signed-off-by: Rob Landley <rob@landley.net> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--include/usage.h12
-rw-r--r--procps/pgrep.c118
2 files changed, 72 insertions, 58 deletions
diff --git a/include/usage.h b/include/usage.h
index 4e05516..53ae0a8 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3229,7 +3229,7 @@
"$ patch -p0 -i example.diff"
#define pgrep_trivial_usage \
- "[-flnovx] PATTERN"
+ "[-flnovx] [-s SID|-P PPID|PATTERN]"
#define pgrep_full_usage "\n\n" \
"Display process(es) selected by regex PATTERN\n" \
"\nOptions:" \
@@ -3237,8 +3237,10 @@
"\n -f Match against entire command line" \
"\n -n Show the newest process only" \
"\n -o Show the oldest process only" \
- "\n -v Negate the matching" \
+ "\n -v Negate the match" \
"\n -x Match whole name (not substring)" \
+ "\n -s Match session ID (0 for current)" \
+ "\n -P Match parent process ID" \
#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
#define pidof_trivial_usage \
@@ -3331,7 +3333,7 @@
"the new root file system"
#define pkill_trivial_usage \
- "[-l] | [-fnovx] [-signal] PATTERN"
+ "[-l|-SIGNAL] [-fnovx] [-s SID|-P PPID|PATTERN]"
#define pkill_full_usage "\n\n" \
"Send a signal to process(es) selected by regex PATTERN\n" \
"\nOptions:" \
@@ -3339,8 +3341,10 @@
"\n -f Match against entire command line" \
"\n -n Signal the newest process only" \
"\n -o Signal the oldest process only" \
- "\n -v Negate the matching" \
+ "\n -v Negate the match" \
"\n -x Match whole name (not substring)" \
+ "\n -s Match session ID (0 for current)" \
+ "\n -P Match parent process ID" \
#define popmaildir_trivial_usage \
"[OPTIONS] Maildir [connection-helper ...]"
diff --git a/procps/pgrep.c b/procps/pgrep.c
index 0e8e529..aef4f22 100644
--- a/procps/pgrep.c
+++ b/procps/pgrep.c
@@ -6,7 +6,6 @@
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
-
#include "libbb.h"
#include "xregex.h"
@@ -15,26 +14,30 @@
#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,
+ /* "vlfxons:P:" */
+ OPTBIT_V = 0, /* must be first, we need OPT_INVERT = 0/1 */
+ OPTBIT_L,
+ OPTBIT_F,
+ OPTBIT_X,
+ OPTBIT_O,
+ OPTBIT_N,
+ OPTBIT_S,
+ OPTBIT_P,
};
-#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))
+#define OPT_INVERT (opt & (1 << OPTBIT_V))
+#define OPT_LIST (opt & (1 << OPTBIT_L))
+#define OPT_FULL (opt & (1 << OPTBIT_F))
+#define OPT_ANCHOR (opt & (1 << OPTBIT_X))
+#define OPT_FIRST (opt & (1 << OPTBIT_O))
+#define OPT_LAST (opt & (1 << OPTBIT_N))
+#define OPT_SID (opt & (1 << OPTBIT_S))
+#define OPT_PPID (opt & (1 << OPTBIT_P))
-static void act(unsigned pid, char *cmd, int signo, unsigned opt)
+static void act(unsigned pid, char *cmd, int signo)
{
if (pgrep) {
- if (OPT_LIST)
+ if (option_mask32 & (1 << OPTBIT_L)) /* OPT_LIST */
printf("%d %s\n", pid, cmd);
else
printf("%d\n", pid);
@@ -45,13 +48,12 @@ static void act(unsigned pid, char *cmd, int signo, unsigned opt)
int pgrep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int pgrep_main(int argc UNUSED_PARAM, char **argv)
{
- unsigned pid = getpid();
- int signo = SIGTERM;
+ unsigned pid;
+ int signo;
unsigned opt;
- int scan_mask = PSSCAN_COMM;
- char *first_arg;
- int first_arg_idx;
+ int scan_mask;
int matched_pid;
+ int sid2match, ppid2match;
char *cmd_last;
procps_status_t *proc;
/* These are initialized to 0 */
@@ -64,52 +66,52 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
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;
- /* not "-<small_letter>..."? */
- if (first_arg[0] != '-' || first_arg[1] < 'a' || first_arg[1] > 'z') {
- argv[first_arg_idx] = NULL; /* terminate argv here */
- break;
+ /* Parse -SIGNAL for pkill. Must be first option, if present */
+ signo = SIGTERM;
+ if (pkill && argv[1] && argv[1][0] == '-') {
+ int temp = get_signum(argv[1]+1);
+ if (temp != -1) {
+ signo = temp;
+ argv++;
}
- first_arg_idx++;
}
- opt = getopt32(argv, "vlfxon");
- argv[first_arg_idx] = first_arg;
+ /* Parse remaining options */
+ ppid2match = -1;
+ sid2match = -1;
+ opt_complementary = "s+:P+"; /* numeric opts */
+ opt = getopt32(argv, "vlfxons:P:", &sid2match, &ppid2match);
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();
- return 0;
- }
- 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++;
- }
+ if (pkill && OPT_LIST) { /* -l: print the whole signal list */
+ print_signames();
+ return 0;
}
- /* One pattern is required */
- if (!argv[0] || argv[1])
+ pid = getpid();
+ if (sid2match == 0)
+ sid2match = getsid(pid);
+
+ scan_mask = PSSCAN_COMM;
+ if (OPT_FULL)
+ scan_mask |= PSSCAN_ARGVN;
+
+ /* One pattern is required, if no -s and no -P */
+ if ((sid2match & ppid2match) < 0 && (!argv[0] || argv[1]))
bb_show_usage();
- xregcomp(&re_buffer, argv[0], 0);
+ if (argv[0])
+ 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;
@@ -120,8 +122,15 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
i--;
}
}
+
+ if (ppid2match >= 0 && ppid2match != proc->ppid)
+ continue;
+ if (sid2match >= 0 && sid2match != proc->sid)
+ continue;
+
/* NB: OPT_INVERT is always 0 or 1 */
- if ((regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
+ if (!argv[0] ||
+ (regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
&& (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == (regoff_t)strlen(cmd)))) ^ OPT_INVERT
) {
matched_pid = proc->pid;
@@ -130,13 +139,14 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
cmd_last = xstrdup(cmd);
continue;
}
- act(proc->pid, cmd, signo, opt);
+ act(proc->pid, cmd, signo);
if (OPT_FIRST)
break;
}
}
+
if (cmd_last) {
- act(matched_pid, cmd_last, signo, opt);
+ act(matched_pid, cmd_last, signo);
if (ENABLE_FEATURE_CLEAN_UP)
free(cmd_last);
}