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kill.c revision 1.1.1.2 
      1 /*
      2  * Copyright (c) 1988, 1993, 1994
      3  *	The Regents of the University of California.  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 static char copyright[] =
     36 "@(#) Copyright (c) 1988, 1993, 1994\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)kill.c	8.3 (Berkeley) 4/2/94";
     42 #endif /* not lint */
     43 
     44 #include <ctype.h>
     45 #include <err.h>
     46 #include <errno.h>
     47 #include <signal.h>
     48 #include <stdio.h>
     49 #include <stdlib.h>
     50 #include <string.h>
     51 
     52 void nosig __P((char *));
     53 void printsig __P((FILE *));
     54 void usage __P((void));
     55 
     56 int
     57 main(argc, argv)
     58 	int argc;
     59 	char *argv[];
     60 {
     61 	const char *const *p;
     62 	int errors, numsig, pid;
     63 	char *ep;
     64 
     65 	if (argc < 2)
     66 		usage();
     67 
     68 	if (!strcmp(*++argv, "-l")) {
     69 		printsig(stdout);
     70 		exit(0);
     71 	}
     72 
     73 	numsig = SIGTERM;
     74 	if (**argv == '-') {
     75 		++*argv;
     76 		if (isalpha(**argv)) {
     77 			if (!strncasecmp(*argv, "sig", 3))
     78 				*argv += 3;
     79 			for (numsig = NSIG, p = sys_signame + 1; --numsig; ++p)
     80 				if (!strcasecmp(*p, *argv)) {
     81 					numsig = p - sys_signame;
     82 					break;
     83 				}
     84 			if (!numsig)
     85 				nosig(*argv);
     86 		} else if (isdigit(**argv)) {
     87 			numsig = strtol(*argv, &ep, 10);
     88 			if (!*argv || *ep)
     89 				errx(1, "illegal signal number: %s", *argv);
     90 			if (numsig <= 0 || numsig > NSIG)
     91 				nosig(*argv);
     92 		} else
     93 			nosig(*argv);
     94 		++argv;
     95 	}
     96 
     97 	if (!*argv)
     98 		usage();
     99 
    100 	for (errors = 0; *argv; ++argv) {
    101 		pid = strtol(*argv, &ep, 10);
    102 		if (!*argv || *ep) {
    103 			warnx("illegal process id: %s", *argv);
    104 			errors = 1;
    105 		} else if (kill(pid, numsig) == -1) {
    106 			warn("%s", *argv);
    107 			errors = 1;
    108 		}
    109 	}
    110 	exit(errors);
    111 }
    112 
    113 void
    114 nosig(name)
    115 	char *name;
    116 {
    117 
    118 	warnx("unknown signal %s; valid signals:", name);
    119 	printsig(stderr);
    120 	exit(1);
    121 }
    122 
    123 void
    124 printsig(fp)
    125 	FILE *fp;
    126 {
    127 	const char *const *p;
    128 	int cnt;
    129 
    130 	for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) {
    131 		(void)fprintf(fp, "%s ", *p);
    132 		if (cnt == NSIG / 2)
    133 			(void)fprintf(fp, "\n");
    134 	}
    135 	(void)fprintf(fp, "\n");
    136 }
    137 
    138 void
    139 usage()
    140 {
    141 
    142 	(void)fprintf(stderr, "usage: kill [-l] [-sig] pid ...\n");
    143 	exit(1);
    144 }
    145