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pgrep: implement -a

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function                                             old     new   delta
pgrep_main                                           640     726     +86

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-06-26 21:10:47 +02:00
parent 234b82ca19
commit 9f4b4226a4
1 changed files with 16 additions and 6 deletions
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22
procps/pgrep.c
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@ -26,10 +26,11 @@
//kbuild:lib-$(CONFIG_PKILL) += pgrep.o
//usage:#define pgrep_trivial_usage
//usage: "[-flnovx] [-s SID|-P PPID|PATTERN]"
//usage: "[-flanovx] [-s SID|-P PPID|PATTERN]"
//usage:#define pgrep_full_usage "\n\n"
//usage: "Display process(es) selected by regex PATTERN\n"
//usage: "\n -l Show command name too"
//usage: "\n -a Show command line too"
//usage: "\n -f Match against entire command line"
//usage: "\n -n Show the newest process only"
//usage: "\n -o Show the oldest process only"
@ -55,13 +56,14 @@
#include "xregex.h"
/* Idea taken from kill.c */
#define pgrep (ENABLE_PGREP && applet_name[1] == 'g')
#define pkill (ENABLE_PKILL && applet_name[1] == 'k')
#define pgrep (ENABLE_PGREP && (!ENABLE_PKILL || applet_name[1] == 'g'))
#define pkill (ENABLE_PKILL && (!ENABLE_PGREP || applet_name[1] == 'k'))
enum {
/* "vlfxons:P:" */
/* "vlafxons:+P:+" */
OPTBIT_V = 0, /* must be first, we need OPT_INVERT = 0/1 */
OPTBIT_L,
OPTBIT_A,
OPTBIT_F,
OPTBIT_X,
OPTBIT_O,
@ -72,6 +74,7 @@ enum {
#define OPT_INVERT (opt & (1 << OPTBIT_V))
#define OPT_LIST (opt & (1 << OPTBIT_L))
#define OPT_LISTFULL (opt & (1 << OPTBIT_A))
#define OPT_FULL (opt & (1 << OPTBIT_F))
#define OPT_ANCHOR (opt & (1 << OPTBIT_X))
#define OPT_FIRST (opt & (1 << OPTBIT_O))
@ -82,7 +85,7 @@ enum {
static void act(unsigned pid, char *cmd, int signo)
{
if (pgrep) {
if (option_mask32 & (1 << OPTBIT_L)) /* OPT_LIST */
if (option_mask32 & ((1 << OPTBIT_L)|(1 << OPTBIT_A))) /* -l or -a */
printf("%u %s\n", pid, cmd);
else
printf("%u\n", pid);
@ -124,7 +127,7 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
/* Parse remaining options */
ppid2match = -1;
sid2match = -1;
opt = getopt32(argv, "vlfxons:+P:+", &sid2match, &ppid2match);
opt = getopt32(argv, "vlafxons:+P:+", &sid2match, &ppid2match);
argv += optind;
if (pkill && OPT_LIST) { /* -l: print the whole signal list */
@ -152,6 +155,7 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
proc = NULL;
while ((proc = procps_scan(proc, scan_mask)) != NULL) {
char *cmd;
int cmdlen;
if (proc->pid == pid)
continue;
@ -161,11 +165,15 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
if (sid2match >= 0 && sid2match != proc->sid)
continue;
cmdlen = -1;
cmd = proc->argv0;
if (!cmd) {
cmd = proc->comm;
} else {
int i = proc->argv_len;
if (!OPT_LISTFULL)
cmdlen = strlen(cmd); /* not -a: find first NUL */
/*
* "sleep 11" looks like "sleep""\0""11""\0" in argv0.
* Make sure last "\0" does not get converted to " ":
@ -190,6 +198,8 @@ int pgrep_main(int argc UNUSED_PARAM, char **argv)
cmd_last = xstrdup(cmd);
continue;
}
if (cmdlen >= 0)
cmd[cmdlen] = '\0';
act(proc->pid, cmd, signo);
if (OPT_FIRST)
break;