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pgrep: add long options & new usage

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Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Sami Kerola 2011-09-26 22:03:43 +02:00
parent e1bfc779f4
commit 4581ac2240
1 changed files with 72 additions and 15 deletions
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87
pgrep.c
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@ -26,6 +26,7 @@
#include <grp.h> #include <grp.h>
#include <regex.h> #include <regex.h>
#include <errno.h> #include <errno.h>
#include <getopt.h>
#include "proc/readproc.h" #include "proc/readproc.h"
#include "proc/sig.h" #include "proc/sig.h"
@ -71,24 +72,45 @@ static union el *opt_ruid = NULL;
static char *opt_pattern = NULL; static char *opt_pattern = NULL;
static char *opt_pidfile = NULL; static char *opt_pidfile = NULL;
static int usage (int opt) NORETURN; static int __attribute__ ((__noreturn__)) usage(int opt)
static int usage (int opt)
{ {
int err = (opt=='?'); /* getopt() uses '?' to mark an error */ int err = (opt == '?');
FILE *fp = err ? stderr : stdout; FILE *fp = err ? stderr : stdout;
if (i_am_pkill) fprintf(fp,
fprintf (fp, "Usage: pkill [-SIGNAL] [-fvx] "); "\nUsage: %s [options] <pattern>\n" "\nOptions:\n", progname);
else
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");
exit(err ? EXIT_USAGE : EXIT_SUCCESS); if (i_am_pkill == 0)
fprintf(fp,
" -c, --count count of matching processes\n"
" -d, --delimeter <string> update delay in seconds\n"
" -l, --list-name list PID and process name\n");
if (i_am_pkill == 1)
fprintf(fp,
" -<sig>, --signal <sig> signal to send (either number or name)\n");
fprintf(fp,
" -f, --full use full process name to match\n"
" -g, --pgroup <id,...> match listed process group IDs\n"
" -G, --group <gid,...> match real group IDs\n"
" -n, --newest select most recently started\n"
" -o, --oldest select least recently started\n"
" -P, --parent <ppid,...> match only childs of given parent\n"
" -s, --session <sid,...> match session IDs\n"
" -t, --terminal <tty,...> match by controlling terminal\n"
" -u, --euid <id,...> match by effective IDs\n"
" -U, --uid <id,...> match by real IDs\n"
" -v, --inverse negates the matching\n"
" -x, --exact match exectly with command name\n"
" -F, --pidfile <file> read PIDs from file\n"
" -L, --logpidfile fail if PID file is not locked\n"
" -h, --help display this help text\n"
" -V, --version display version information and exit\n");
fprintf(fp, "\nFor more information see %s(1).\n", progname);
exit(fp == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
} }
static union el *split_list (const char *restrict str, int (*convert)(const char *, union el *)) static union el *split_list (const char *restrict str, int (*convert)(const char *, union el *))
{ {
char *copy = strdup (str); char *copy = strdup (str);
@ -547,6 +569,33 @@ static void parse_opts (int argc, char **argv)
int opt; int opt;
int criteria_count = 0; int criteria_count = 0;
enum {
SIGNAL_OPTION = CHAR_MAX + 1
};
static const struct option longopts[] = {
{"signal", required_argument, NULL, SIGNAL_OPTION},
{"count", no_argument, NULL, 'c'},
{"delimeter", required_argument, NULL, 'd'},
{"list-name", no_argument, NULL, 'l'},
{"full", no_argument, NULL, 'f'},
{"pgroup", required_argument, NULL, 'g'},
{"group", required_argument, NULL, 'G'},
{"newest", no_argument, NULL, 'n'},
{"oldest", no_argument, NULL, 'o'},
{"parent", required_argument, NULL, 'P'},
{"session", required_argument, NULL, 's'},
{"terminal", required_argument, NULL, 't'},
{"euid", required_argument, NULL, 'u'},
{"uid", required_argument, NULL, 'U'},
{"inverse", no_argument, NULL, 'v'},
{"exact", no_argument, NULL, 'x'},
{"pidfile", required_argument, NULL, 'F'},
{"logpidfile", no_argument, NULL, 'L'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
if (strstr (argv[0], "pkill")) { if (strstr (argv[0], "pkill")) {
i_am_pkill = 1; i_am_pkill = 1;
progname = "pkill"; progname = "pkill";
@ -566,13 +615,18 @@ static void parse_opts (int argc, char **argv)
} }
} else { } else {
/* These options are for pgrep only */ /* These options are for pgrep only */
strcat (opts, "ld:"); strcat (opts, "cld:");
} }
strcat (opts, "LF:cfnovxP:g:s:u:U:G:t:?V"); strcat (opts, "LF:fnovxP:g:s:u:U:G:t:?Vh");
while ((opt = getopt (argc, argv, opts)) != -1) { while ((opt = getopt_long (argc, argv, opts, longopts, NULL)) != -1) {
switch (opt) { switch (opt) {
case SIGNAL_OPTION:
opt_signal = signal_name_to_number (optarg);
if (opt_signal == -1 && isdigit (optarg[0]))
opt_signal = atoi (optarg);
break;
// case 'D': // FreeBSD: print info about non-matches for debugging // case 'D': // FreeBSD: print info about non-matches for debugging
// break; // break;
case 'F': // FreeBSD: the arg is a file containing a PID to match case 'F': // FreeBSD: the arg is a file containing a PID to match
@ -683,6 +737,9 @@ static void parse_opts (int argc, char **argv)
break; break;
// case 'z': // Solaris: match by zone ID // case 'z': // Solaris: match by zone ID
// break; // break;
case 'h':
usage (opt);
break;
case '?': case '?':
usage (optopt ? optopt : opt); usage (optopt ? optopt : opt);
break; break;