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	kill.c - sbase - suckless unix tools
	git clone git://git.suckless.org/sbase
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	---
	kill.c (2427B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/wait.h>
	3
	4 #include <ctype.h>
	5 #include <limits.h>
	6 #include <signal.h>
	7 #include <stdio.h>
	8 #include <string.h>
	9 #include <strings.h>
	10
	11 #include "util.h"
	12
	13 struct {
	14 const char *name;
	15 const int sig;
	16 } sigs[] = {
	17 { "0", 0 },
	18 #define SIG(n) { #n, SIG##n }
	19 SIG(ABRT), SIG(ALRM), SIG(BUS), SIG(CHLD), SIG(CONT), SIG(FPE),…
	20 SIG(ILL), SIG(INT), SIG(KILL), SIG(PIPE), SIG(QUIT), SIG(SEGV)…
	21 SIG(TERM), SIG(TRAP), SIG(TSTP), SIG(TTIN), SIG(TTOU), SIG(USR1)…
	22 SIG(URG),
	23 #undef SIG
	24 };
	25
	26 const char *
	27 sig2name(const int sig)
	28 {
	29 size_t i;
	30
	31 for (i = 0; i < LEN(sigs); i++)
	32 if (sigs[i].sig == sig)
	33 return sigs[i].name;
	34 eprintf("%d: bad signal number\n", sig);
	35
	36 return NULL; /* not reached */
	37 }
	38
	39 int
	40 name2sig(const char *name)
	41 {
	42 size_t i;
	43
	44 for (i = 0; i < LEN(sigs); i++)
	45 if (!strcasecmp(sigs[i].name, name))
	46 return sigs[i].sig;
	47 eprintf("%s: bad signal name\n", name);
	48
	49 return -1; /* not reached */
	50 }
	51
	52 static void
	53 usage(void)
	54 {
	55 eprintf("usage: %s [-s signame \| -num \| -signame] pid ...\n"
	56 " %s -l [num]\n", argv0, argv0);
	57 }
	58
	59 int
	60 main(int argc, char *argv[])
	61 {
	62 pid_t pid;
	63 size_t i;
	64 int ret = 0, sig = SIGTERM;
	65
	66 argv0 = argv, argv0 ? (argc--, argv++) : (void )0;
	67
	68 if (!argc)
	69 usage();
	70
	71 if ((*argv)[0] == '-') {
	72 switch ((*argv)[1]) {
	73 case 'l':
	74 if ((*argv)[2])
	75 goto longopt;
	76 argc--, argv++;
	77 if (!argc) {
	78 for (i = 0; i < LEN(sigs); i++)
	79 puts(sigs[i].name);
	80 } else if (argc == 1) {
	81 sig = estrtonum(*argv, 0, INT_MAX);
	82 if (sig > 128)
	83 sig = WTERMSIG(sig);
	84 puts(sig2name(sig));
	85 } else {
	86 usage();
	87 }
	88 return fshut(stdout, "<stdout>");
	89 case 's':
	90 if ((*argv)[2])
	91 goto longopt;
	92 argc--, argv++;
	93 if (!argc)
	94 usage();
	95 sig = name2sig(*argv);
	96 argc--, argv++;
	97 break;
	98 case '-':
	99 if ((*argv)[2])
	100 goto longopt;
	101 argc--, argv++;
	102 break;
	103 default:
	104 longopt:
	105 /* XSI-extensions -argnum and -argname*/
	106 if (isdigit((*argv)[1])) {
	107 sig = estrtonum((*argv) + 1, 0, INT_MAX);
	108 sig2name(sig);
	109 } else {
	110 sig = name2sig((*argv) + 1);
	111 }
	112 argc--, argv++;
	113 }
	114 }
	115
	116 if (argc && !strcmp(*argv, "--"))
	117 argc--, argv++;
	118
	119 if (!argc)
	120 usage();
	121
	122 for (; *argv; argc--, argv++) {
	123 pid = estrtonum(*argv, INT_MIN, INT_MAX);
	124 if (kill(pid, sig) < 0) {
	125 weprintf("kill %d:", pid);
	126 ret = 1;
	127 }
	128 }
	129
	130 return ret;
	131 }