mirror of
https://github.com/sheumann/hush.git
synced 2024-12-30 20:29:21 +00:00
139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini pgrep/pkill implementation for busybox
|
|
*
|
|
* Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com>
|
|
*
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include <getopt.h>
|
|
|
|
#include "libbb.h"
|
|
#include "xregex.h"
|
|
|
|
/* Idea taken from kill.c */
|
|
#define pgrep (ENABLE_PGREP && applet_name[1] == 'g')
|
|
#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,
|
|
};
|
|
|
|
#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))
|
|
|
|
static void act(unsigned pid, char *cmd, int signo, unsigned opt)
|
|
{
|
|
if (pgrep) {
|
|
if (OPT_LIST)
|
|
printf("%d %s\n", pid, cmd);
|
|
else
|
|
printf("%d\n", pid);
|
|
} else
|
|
kill(pid, signo);
|
|
}
|
|
|
|
int pgrep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int pgrep_main(int argc, char **argv)
|
|
{
|
|
unsigned pid = getpid();
|
|
int signo = SIGTERM;
|
|
unsigned opt;
|
|
int scan_mask = PSSCAN_COMM;
|
|
char *first_arg;
|
|
int first_arg_idx;
|
|
int matched_pid;
|
|
char *cmd_last;
|
|
procps_status_t *proc;
|
|
/* These are initialized to 0 */
|
|
struct {
|
|
regex_t re_buffer;
|
|
regmatch_t re_match[1];
|
|
} Z;
|
|
#define re_buffer (Z.re_buffer)
|
|
#define re_match (Z.re_match )
|
|
|
|
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;
|
|
if (first_arg[0] != '-' || first_arg[1] < 'a' || first_arg[1] > 'z') {
|
|
argv[first_arg_idx] = NULL;
|
|
break;
|
|
}
|
|
first_arg_idx++;
|
|
}
|
|
opt = getopt32(argv, "vlfxon");
|
|
argv[first_arg_idx] = first_arg;
|
|
|
|
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++;
|
|
}
|
|
}
|
|
|
|
/* One pattern is required */
|
|
if (!argv[0] || argv[1])
|
|
bb_show_usage();
|
|
|
|
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;
|
|
/* NB: OPT_INVERT is always 0 or 1 */
|
|
if ((regexec(&re_buffer, cmd, 1, re_match, 0) == 0 /* match found */
|
|
&& (!OPT_ANCHOR || (re_match[0].rm_so == 0 && re_match[0].rm_eo == strlen(cmd)))) ^ OPT_INVERT
|
|
) {
|
|
matched_pid = proc->pid;
|
|
if (OPT_LAST) {
|
|
free(cmd_last);
|
|
cmd_last = xstrdup(cmd);
|
|
continue;
|
|
}
|
|
act(proc->pid, cmd, signo, opt);
|
|
if (OPT_FIRST)
|
|
break;
|
|
}
|
|
}
|
|
if (cmd_last) {
|
|
act(matched_pid, cmd_last, signo, opt);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(cmd_last);
|
|
}
|
|
return matched_pid == 0; /* return 1 if no processes listed/signaled */
|
|
}
|