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kill.c revision 1.1 
      1 /*
      2  * Copyright (c) 1988 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 char copyright[] =
     36 "@(#) Copyright (c) 1988 Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)kill.c	5.3 (Berkeley) 7/1/91";
     42 #endif /* not lint */
     43 
     44 #include <signal.h>
     45 #include <errno.h>
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <ctype.h>
     50 
     51 static char *signals[] = {
     52 	"hup", "int", "quit", "ill", "trap", "iot",		/*  1 - 6  */
     53 	"emt", "fpe", "kill", "bus", "segv", "sys",		/*  7 - 12 */
     54 	"pipe", "alrm",  "term", "urg", "stop", "tstp",		/* 13 - 18 */
     55 	"cont", "chld", "ttin", "ttou", "io", "xcpu",		/* 19 - 24 */
     56 	"xfsz", "vtalrm", "prof", "winch", "info", "usr1",	/* 25 - 30 */
     57 	"usr2", NULL,						/* 31 - 32 */
     58 };
     59 
     60 main(argc, argv)
     61 	int argc;
     62 	char **argv;
     63 {
     64 	register int errors, numsig, pid;
     65 	register char **p;
     66 	char *ep;
     67 
     68 	if (argc < 2)
     69 		usage();
     70 
     71 	if (!strcmp(*++argv, "-l")) {
     72 		printsig(stdout);
     73 		exit(0);
     74 	}
     75 
     76 	numsig = SIGTERM;
     77 	if (**argv == '-') {
     78 		++*argv;
     79 		if (isalpha(**argv)) {
     80 			if (!strncasecmp(*argv, "sig", 3))
     81 				*argv += 3;
     82 			for (p = signals;; ++p) {
     83 				if (!*p)
     84 					nosig(*argv);
     85 				if (!strcasecmp(*p, *argv)) {
     86 					numsig = p - signals + 1;
     87 					break;
     88 				}
     89 			}
     90 		} else if (isdigit(**argv)) {
     91 			numsig = strtol(*argv, &ep, 10);
     92 			if (!*argv || *ep) {
     93 				(void)fprintf(stderr,
     94 				    "kill: illegal signal number %s\n", *argv);
     95 				exit(1);
     96 			}
     97 			if (numsig <= 0 || numsig > NSIG)
     98 				nosig(*argv);
     99 		} else
    100 			nosig(*argv);
    101 		++argv;
    102 	}
    103 
    104 	if (!*argv)
    105 		usage();
    106 
    107 	for (errors = 0; *argv; ++argv) {
    108 		pid = strtol(*argv, &ep, 10);
    109 		if (!*argv || *ep) {
    110 			(void)fprintf(stderr,
    111 			    "kill: illegal process id %s\n", *argv);
    112 			continue;
    113 		}
    114 		if (kill(pid, numsig) == -1) {
    115 			(void)fprintf(stderr,
    116 			    "kill: %s: %s\n", *argv, strerror(errno));
    117 			errors = 1;
    118 		}
    119 	}
    120 	exit(errors);
    121 }
    122 
    123 nosig(name)
    124 	char *name;
    125 {
    126 	(void)fprintf(stderr,
    127 	    "kill: unknown signal %s; valid signals:\n", name);
    128 	printsig(stderr);
    129 	exit(1);
    130 }
    131 
    132 printsig(fp)
    133 	FILE *fp;
    134 {
    135 	register char **p;
    136 
    137 	for (p = signals; *p; ++p) {
    138 		(void)fprintf(fp, "%s ", *p);
    139 		if ((p - signals) == NSIG / 2 - 1)
    140 			(void)fprintf(fp, "\n");
    141 	}
    142 	(void)fprintf(fp, "\n");
    143 }
    144 
    145 usage()
    146 {
    147 	(void)fprintf(stderr, "usage: kill [-l] [-sig] pid ...\n");
    148 	exit(1);
    149 }
    150