sbase/kill.c

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2.7 KiB
C
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/* See LICENSE file for copyright and license details. */
#include <sys/wait.h>
#include <ctype.h>
#include <errno.h>
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#include <signal.h>
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#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <strings.h>
#include <unistd.h>
#include "util.h"
struct {
const char *name;
int sig;
} sigs[] = {
#define SIG(n) { #n, SIG##n }
SIG(ABRT), SIG(ALRM), SIG(BUS), SIG(CHLD), SIG(CONT), SIG(FPE), SIG(HUP),
SIG(ILL), SIG(INT), SIG(KILL), SIG(PIPE), SIG(QUIT), SIG(SEGV), SIG(STOP),
SIG(TERM), SIG(TSTP), SIG(TTIN), SIG(TTOU), SIG(USR1), SIG(USR2), SIG(URG),
#undef SIG
};
const char *sig2name(int);
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int name2sig(const char *);
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static void
usage(void)
{
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weprintf("usage: %s [-s signame | -signum | -signame] pid ...\n", argv0);
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weprintf(" %s -l [exit_status]\n", argv0);
exit(1);
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}
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int
main(int argc, char *argv[])
{
char *end;
const char *name;
int ret = 0;
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int sig = SIGTERM;
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pid_t pid;
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size_t i;
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argv0 = argv[0];
if (argc < 2)
usage();
argc--;
argv++;
if (strcmp(argv[0], "--") == 0) {
argc--;
argv++;
} else if (argv[0][0] == '-' && isdigit(argv[0][1])) {
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/* handle XSI extension -signum */
errno = 0;
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sig = strtol(&argv[0][1], &end, 10);
if (*end != '\0' || errno != 0)
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eprintf("%s: bad signal number\n", &argv[0][1]);
sig2name(sig);
argc--;
argv++;
} else if (strcmp(argv[0], "-l") == 0) {
argc--;
argv++;
if (argc == 0) {
for (i = 0; i < LEN(sigs); i++)
puts(sigs[i].name);
exit(0);
} else if (argc > 1)
usage();
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errno = 0;
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sig = strtol(argv[0], &end, 10);
if (*end != '\0' || errno != 0)
eprintf("%s: bad signal number\n", argv[0]);
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if (sig > 128)
sig = WTERMSIG(sig);
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puts(sig2name(sig));
exit(0);
} else {
if (strcmp(argv[0], "-s") == 0) {
argc--;
argv++;
if (argc == 0)
usage();
name = argv[0];
} else {
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/* assume XSI extension -signame */
name = &argv[0][1];
}
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sig = strcmp(name, "0") == 0 ? 0 : name2sig(name);
argc--;
argv++;
}
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if (argc == 0)
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usage();
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for (; argc; argc--, argv++) {
errno = 0;
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pid = strtol(argv[0], &end, 10);
if (*end == '\0' && errno == 0) {
if (kill(pid, sig) < 0) {
weprintf("kill %d:", pid);
ret = 1;
}
} else {
weprintf("%s: bad pid\n", argv[0]);
ret = 1;
}
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}
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exit(ret);
}
const char *
sig2name(int sig)
{
size_t i;
for (i = 0; i < LEN(sigs); i++)
if (sigs[i].sig == sig)
return sigs[i].name;
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eprintf("%d: bad signal number\n", sig);
/* unreachable */
return NULL;
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}
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int
name2sig(const char *name)
{
size_t i;
for (i = 0; i < LEN(sigs); i++)
if (strcasecmp(sigs[i].name, name) == 0)
return sigs[i].sig;
eprintf("%s: bad signal name\n", name);
/* unreachable */
return -1;
}