ec8246bbc6
It actually makes the binaries smaller, the code easier to read (gems like "val == true", "val == false" are gone) and actually predictable in the sense of that we actually know what we're working with (one bitwise operator was quite adventurous and should now be fixed). This is also more consistent with the other suckless projects around which don't use boolean types.
139 lines
2.6 KiB
C
139 lines
2.6 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "util.h"
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struct {
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const char *name;
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int sig;
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} sigs[] = {
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{ "0", 0 },
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#define SIG(n) { #n, SIG##n }
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SIG(ABRT), SIG(ALRM), SIG(BUS), SIG(CHLD), SIG(CONT), SIG(FPE), SIG(HUP),
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SIG(ILL), SIG(INT), SIG(KILL), SIG(PIPE), SIG(QUIT), SIG(SEGV), SIG(STOP),
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SIG(TERM), SIG(TSTP), SIG(TTIN), SIG(TTOU), SIG(USR1), SIG(USR2), SIG(URG),
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#undef SIG
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};
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const char *sig2name(int);
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int name2sig(const char *);
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static void
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usage(void)
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{
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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);
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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char *end;
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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];
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if (argc < 2)
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usage();
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argc--, argv++;
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if (strcmp(argv[0], "-l") == 0) {
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argc--, argv++;
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if (argc == 0) {
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for (i = 0; i < LEN(sigs); i++)
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puts(sigs[i].name);
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exit(0);
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} else if (argc > 1)
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usage();
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errno = 0;
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sig = strtol(argv[0], &end, 10);
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if (*end != '\0' || errno != 0)
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eprintf("%s: bad signal number\n", argv[0]);
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if (sig > 128)
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sig = WTERMSIG(sig);
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puts(sig2name(sig));
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exit(0);
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}
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if (strcmp(argv[0], "-s") == 0) {
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argc--, argv++;
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if (argc == 0)
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usage();
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sig = name2sig(argv[0]);
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argc--, argv++;
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} else if (argv[0][0] == '-') {
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if (isdigit(argv[0][1])) {
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/* handle XSI extension -signum */
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errno = 0;
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sig = strtol(&argv[0][1], &end, 10);
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if (*end != '\0' || errno != 0)
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eprintf("%s: bad signal number\n", &argv[0][1]);
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sig2name(sig);
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argc--, argv++;
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} else if (argv[0][1] != '-') {
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/* handle XSI extension -signame */
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sig = name2sig(&argv[0][1]);
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argc--, argv++;
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}
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}
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if (argc > 0 && strcmp(argv[0], "--") == 0)
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argc--, argv++;
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if (argc == 0)
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usage();
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for (; argc; argc--, argv++) {
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errno = 0;
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pid = strtol(argv[0], &end, 10);
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if (*end == '\0' && errno == 0) {
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if (kill(pid, sig) < 0) {
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weprintf("kill %d:", pid);
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ret = 1;
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}
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} else {
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weprintf("%s: bad pid\n", argv[0]);
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ret = 1;
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}
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}
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exit(ret);
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}
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const char *
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sig2name(int sig)
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{
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size_t i;
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for (i = 0; i < LEN(sigs); i++)
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if (sigs[i].sig == sig)
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return sigs[i].name;
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eprintf("%d: bad signal number\n", sig);
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/* unreachable */
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return NULL;
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}
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int
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name2sig(const char *name)
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{
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size_t i;
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for (i = 0; i < LEN(sigs); i++)
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if (strcasecmp(sigs[i].name, name) == 0)
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return sigs[i].sig;
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eprintf("%s: bad signal name\n", name);
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/* unreachable */
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return -1;
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}
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