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pgrep: add -c option for counting number of matched proceesses

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A patch from Debian.

Bug-Debian: http://bugs.debian.org/375791
Backported-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Craig Small 2009-11-24 11:00:45 +01:00 committed by Craig Small
parent 5d29bfedc8
commit 6bc22a379f
2 changed files with 17 additions and 7 deletions
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4
pgrep.1
View File

@ -8,7 +8,7 @@ pgrep, pkill \- look up or signal processes based on name and other attributes
.SH SYNOPSIS
.na
\fBpgrep\fR [\fB\-flvx\fR] [\fB\-d\ \fIdelimiter\fR] [\fB\-n\fR|\fB\-o\fR] \
\fBpgrep\fR [\fB\-cflvx\fR] [\fB\-d\ \fIdelimiter\fR] [\fB\-n\fR|\fB\-o\fR] \
[\fB\-P\ \fIppid\fR,...] [\fB\-g\ \fIpgrp\fR,...] [\fB\-s\ \fIsid\fR,...] \
[\fB\-u\ \fIeuid\fR,...] [\fB\-U\ \fIuid\fR,...] [\fB\-G\ \fIgid\fR,...] \
[\fB\-t\ \fIterm\fR,...] [\fIpattern\fR]
@ -41,6 +41,8 @@ will list the processes owned by \fBroot\fP OR \fBdaemon\fP.
to each process instead of listing them on stdout.
.SH OPTIONS
\-c
Suppress normal output; instead print a count of matching processes.
.TP
\fB\-d \fIdelimiter\fP
Sets the string used to delimit each process ID in the output (by

16
pgrep.c
View File

@ -54,6 +54,7 @@ static int opt_oldest = 0;
static int opt_newest = 0;
static int opt_negate = 0;
static int opt_exact = 0;
static int opt_count = 0;
static int opt_signal = SIGTERM;
static int opt_lock = 0;
static int opt_case = 0;
@ -79,7 +80,7 @@ static int usage (int opt)
if (i_am_pkill)
fprintf (fp, "Usage: pkill [-SIGNAL] [-fvx] ");
else
fprintf (fp, "Usage: pgrep [-flvx] [-d DELIM] ");
fprintf (fp, "Usage: pgrep [-cflvx] [-d DELIM] ");
fprintf (fp, "[-n|-o] [-P PPIDLIST] [-g PGRPLIST] [-s SIDLIST]\n"
"\t[-u EUIDLIST] [-U UIDLIST] [-G GIDLIST] [-t TERMLIST] "
"[PATTERN]\n");
@ -567,7 +568,7 @@ static void parse_opts (int argc, char **argv)
strcat (opts, "ld:");
}
strcat (opts, "LF:fnovxP:g:s:u:U:G:t:?V");
strcat (opts, "LF:cfnovxP:g:s:u:U:G:t:?V");
while ((opt = getopt (argc, argv, opts)) != -1) {
switch (opt) {
@ -615,6 +616,9 @@ static void parse_opts (int argc, char **argv)
exit(EXIT_SUCCESS);
// case 'c': // Solaris: match by contract ID
// break;
case 'c':
opt_count = 1;
break;
case 'd': // Solaris: change the delimiter
opt_delim = strdup (optarg);
break;
@ -725,11 +729,15 @@ int main (int argc, char *argv[])
fprintf (stderr, "pkill: %ld - %s\n",
procs[i].num, strerror (errno));
}
} else {
if (opt_count) {
fprintf(stdout, "%ld\n", num);
} else {
if (opt_long)
output_strlist(procs,num);
output_strlist (procs,num);
else
output_numlist(procs,num);
output_numlist (procs,num);
}
}
return !num; // exit(EXIT_SUCCESS) if match, otherwise exit(EXIT_FAILURE)
}