1 /* vi: set sw=4 ts=4: */
3 * Mini pgrep/pkill implementation for busybox
5 * Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 //usage:#define pgrep_trivial_usage
11 //usage: "[-flnovx] [-s SID|-P PPID|PATTERN]"
12 //usage:#define pgrep_full_usage "\n\n"
13 //usage: "Display process(es) selected by regex PATTERN\n"
14 //usage: "\n -l Show command name too"
15 //usage: "\n -f Match against entire command line"
16 //usage: "\n -n Show the newest process only"
17 //usage: "\n -o Show the oldest process only"
18 //usage: "\n -v Negate the match"
19 //usage: "\n -x Match whole name (not substring)"
20 //usage: "\n -s Match session ID (0 for current)"
21 //usage: "\n -P Match parent process ID"
23 //usage:#define pkill_trivial_usage
24 //usage: "[-l|-SIGNAL] [-fnovx] [-s SID|-P PPID|PATTERN]"
25 //usage:#define pkill_full_usage "\n\n"
26 //usage: "Send a signal to process(es) selected by regex PATTERN\n"
27 //usage: "\n -l List all signals"
28 //usage: "\n -f Match against entire command line"
29 //usage: "\n -n Signal the newest process only"
30 //usage: "\n -o Signal the oldest process only"
31 //usage: "\n -v Negate the match"
32 //usage: "\n -x Match whole name (not substring)"
33 //usage: "\n -s Match session ID (0 for current)"
34 //usage: "\n -P Match parent process ID"
39 /* Idea taken from kill.c */
40 #define pgrep (ENABLE_PGREP && applet_name[1] == 'g')
41 #define pkill (ENABLE_PKILL && applet_name[1] == 'k')
45 OPTBIT_V = 0, /* must be first, we need OPT_INVERT = 0/1 */
55 #define OPT_INVERT (opt & (1 << OPTBIT_V))
56 #define OPT_LIST (opt & (1 << OPTBIT_L))
57 #define OPT_FULL (opt & (1 << OPTBIT_F))
58 #define OPT_ANCHOR (opt & (1 << OPTBIT_X))
59 #define OPT_FIRST (opt & (1 << OPTBIT_O))
60 #define OPT_LAST (opt & (1 << OPTBIT_N))
61 #define OPT_SID (opt & (1 << OPTBIT_S))
62 #define OPT_PPID (opt & (1 << OPTBIT_P))
64 static void act(unsigned pid, char *cmd, int signo)
67 if (option_mask32 & (1 << OPTBIT_L)) /* OPT_LIST */
68 printf("%d %s\n", pid, cmd);
75 int pgrep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
76 int pgrep_main(int argc UNUSED_PARAM, char **argv)
83 int sid2match, ppid2match;
85 procps_status_t *proc;
86 /* These are initialized to 0 */
89 regmatch_t re_match[1];
91 #define re_buffer (Z.re_buffer)
92 #define re_match (Z.re_match )
94 memset(&Z, 0, sizeof(Z));
96 /* Parse -SIGNAL for pkill. Must be first option, if present */
98 if (pkill && argv[1] && argv[1][0] == '-') {
99 int temp = get_signum(argv[1]+1);
106 /* Parse remaining options */
109 opt_complementary = "s+:P+"; /* numeric opts */
110 opt = getopt32(argv, "vlfxons:P:", &sid2match, &ppid2match);
113 if (pkill && OPT_LIST) { /* -l: print the whole signal list */
120 sid2match = getsid(pid);
122 scan_mask = PSSCAN_COMM | PSSCAN_ARGV0;
124 scan_mask |= PSSCAN_ARGVN;
126 /* One pattern is required, if no -s and no -P */
127 if ((sid2match & ppid2match) < 0 && (!argv[0] || argv[1]))
131 xregcomp(&re_buffer, argv[0], 0);
136 while ((proc = procps_scan(proc, scan_mask)) != NULL) {
139 if (proc->pid == pid)
146 int i = proc->argv_len;
148 if ((unsigned char)cmd[i] < ' ')
153 if (ppid2match >= 0 && ppid2match != proc->ppid)
155 if (sid2match >= 0 && sid2match != proc->sid)
158 /* NB: OPT_INVERT is always 0 or 1 */
160 || (regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
161 && (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == (regoff_t)strlen(cmd)))
164 matched_pid = proc->pid;
167 cmd_last = xstrdup(cmd);
170 act(proc->pid, cmd, signo);
177 act(matched_pid, cmd_last, signo);
178 if (ENABLE_FEATURE_CLEAN_UP)
181 return matched_pid == 0; /* return 1 if no processes listed/signaled */