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/* vi: set sw=4 ts=4:
*
* 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
USE_KILL(NEWTOY(kill, NULL, TOYFLAG_BIN))
config KILL
bool "kill"
default y
help
usage: kill [-l signal_number | -s signal_name | -signal_name | -signal_number] pid...
Send a signal to a process
*/
#include "toys.h"
#define TT this.kill
typedef struct {
int signum;
char *signame;
} signals_t;
const signals_t signals[] = {
{ 1, "HUP"},
{ 2, "INT"},
{ 3, "QUIT"},
{ 4, "ILL"},
{ 5, "TRAP"},
{ 6, "ABRT"},
{ 7, "BUS"},
{ 8, "FPE"},
{ 9, "KILL"},
{ 10, "USR1"},
{ 11, "SEGV"},
{ 12, "USR2"},
{ 13, "PIPE"},
{ 14, "ALRM"},
{ 15, "TERM"},
{ 16, "STKFLT"},
{ 17, "CHLD"},
{ 18, "CONT"},
{ 19, "STOP"},
{ 20, "TSTP"},
{ 21, "TTIN"},
{ 22, "TTOU"},
{ 23, "URG"},
{ 24, "XCPU"},
{ 25, "XFSZ"},
{ 26, "VTALRM"},
{ 27, "PROF"},
{ 28, "WINCH"},
{ 29, "POLL"},
{ 30, "PWR"},
{ 31, "SYS"},
/* terminator */
{ -1, NULL},
};
static char* signum_to_signame(int sig)
{
int i = 0;
for (;;) {
if (signals[i].signum == sig)
return signals[i].signame;
if (signals[++i].signum == -1)
break;
}
return NULL;
}
static int signame_to_signum(char *signame)
{
int i=0;
for (;;) {
if (!strcmp(signals[i].signame, signame))
return signals[i].signum;
if (signals[++i].signum == -1)
break;
}
return -1;
}
static int send_signal(int sig, pid_t pid)
{
if (kill(pid, sig) < 0) {
perror("kill");
return -1;
}
return 0;
}
static void list_all_signals()
{
int i = 0;
for (;;) {
printf("%s ", signals[i++].signame);
if (i % 16 == 0)
printf("\n");
if (signals[i].signum == -1)
break;
}
printf("\n");
}
static int list_signal(int signum)
{
char *signam = signum_to_signame(signum);
if (signam) {
printf("%s\n", signam);
return 0;
} else {
printf("Unknown signal %d\n", signum);
return -1;
}
}
static int list_signal_by_name(char *signame)
{
int signum = signame_to_signum(signame);
if (signum > 0) {
printf("%d\n", signum);
return 0;
} else {
printf("Unknown signal %s\n", signame);
return -1;
}
}
void kill_main(void)
{
int signum = 0;
int have_signal = 0;
char *signame, *tmp;
pid_t pid;
while (*toys.optargs) {
char *arg = *(toys.optargs++);
if (arg[0] == '-' && !have_signal) {
arg++;
switch(arg[0]) {
case 'l':
if (!*toys.optargs)
list_all_signals();
else {
signum = strtol(*(toys.optargs), &signame, 10);
if (signame == *(toys.optargs))
list_signal_by_name(signame);
else
list_signal(signum);
}
return;
case 's':
arg = *(toys.optargs++);
default:
signum = strtol(arg, &signame, 10);
if (signame == arg) {
signum = signame_to_signum(signame);
if (signum < 0) {
toys.exitval = EXIT_FAILURE;
return;
}
}
have_signal = 1;
}
} else {
/* pids */
pid = strtol(arg, &tmp, 10);
if (tmp == arg) {
toys.exitval = EXIT_FAILURE;
return;
}
if (send_signal(signum, pid) < 0) {
toys.exitval = EXIT_FAILURE;
return;
}
}
}
}
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