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/* kill.c - a program to send signals to processes
*
* Copyright 2012 Daniel Walter <d.walter@0x90.at>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/kill.html
*
* killall5.c - Send signal to all processes outside current session.
*
* Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
* Copyright 2014 Kyungwan Han <asura321@gamil.com>
*
* No Standard
USE_KILL(NEWTOY(kill, "?ls: ", TOYFLAG_BIN))
USE_KILLALL5(NEWTOY(killall5, "?o*ls: [!lo][!ls]", TOYFLAG_SBIN))
config KILL
bool "kill"
default y
help
usage: kill [-l [SIGNAL] | -s SIGNAL | -SIGNAL] pid...
Send signal to process(es).
-l List signal name(s) and number(s)
-s Send SIGNAL (default SIGTERM)
config KILLALL5
bool "killall5"
default y
depends on KILL
help
usage: killall5 [-l [SIGNAL]] [-SIGNAL|-s SIGNAL] [-o PID]...
Send a signal to all processes outside current session.
-l List signal name(s) and number(s)
-o PID Omit PID
-s Send SIGNAL (default SIGTERM)
*/
// This has to match the filename:
#define FOR_kill
#include "toys.h"
GLOBALS(
char *s;
struct arg_list *o;
)
// But kill's flags are a subset of killall5's
#define CLEANUP_kill
#define FOR_killall5
#include "generated/flags.h"
void kill_main(void)
{
int signum;
char *tmp, **args = toys.optargs;
pid_t pid;
// list signal(s)
if (toys.optflags & FLAG_l) {
if (*args) {
int signum = sig_to_num(*args);
char *s = NULL;
if (signum>=0) s = num_to_sig(signum&127);
puts(s ? s : "UNKNOWN");
} else sig_to_num(NULL);
return;
}
// signal must come before pids, so "kill -9 -1" isn't confusing.
if (!TT.s && *args && **args=='-') TT.s = *(args++)+1;
if (TT.s) {
char *arg;
int i = strtol(TT.s, &arg, 10);
if (!*arg) arg = num_to_sig(i);
else arg = TT.s;
if (!arg || -1 == (signum = sig_to_num(arg)))
error_exit("Unknown signal '%s'", arg);
} else signum = SIGTERM;
// is it killall5?
if (CFG_KILLALL5 && toys.which->name[4]=='a') {
DIR *dp;
struct dirent *entry;
int pid, sid;
long *olist = 0, ocount = 0;
// parse omit list
if (toys.optflags & FLAG_o) {
struct arg_list *ptr;
for (ptr = TT.o; ptr; ptr = ptr->next) ocount++;
olist = xmalloc(ocount*sizeof(long));
ocount = 0;
for (ptr = TT.o; ptr; ptr=ptr->next) olist[ocount++] = atolx(ptr->arg);
}
sid = getsid(pid = getpid());
if (!(dp = opendir("/proc"))) perror_exit("/proc");
while ((entry = readdir(dp))) {
int count, procpid, procsid;
if (!(procpid = atoi(entry->d_name))) continue;
snprintf(toybuf, sizeof(toybuf), "/proc/%d/stat", procpid);
if (!readfile(toybuf, toybuf, sizeof(toybuf))) continue;
if (sscanf(toybuf, "%*d %*s %*c %*d %*d %d", &procsid) != 1) continue;
if (pid == procpid || sid == procsid || procpid == 1) continue;
// Check for kernel threads.
snprintf(toybuf, sizeof(toybuf), "/proc/%d/cmdline", procpid);
if (!readfile(toybuf, toybuf, sizeof(toybuf)) || !*toybuf) continue;
// Check with omit list.
for (count = 0; count < ocount; count++)
if (procpid == olist[count]) break;
if (count != ocount) continue;
kill(procpid, signum);
}
if (CFG_TOYBOX_FREE) {
closedir(dp);
free(olist);
}
// is it kill?
} else {
// "<1" in optstr wouldn't cover this because "-SIGNAL"
if (!*args) help_exit("missing argument");
while (*args) {
char *arg = *(args++);
pid = strtol(arg, &tmp, 10);
if (*tmp || kill(pid, signum) < 0) error_msg("unknown pid '%s'", arg);
}
}
}
void killall5_main(void)
{
kill_main();
}
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