/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <stdlib.h>#include <sys/types.h>#include <unistd.h>#include <signal.h>#include <ctype.h>#include <stdio.h>#include <string.h> #define NSIG SIGUSR2 char *signm[NSIG+1] = { 0,"SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT", "SIGFPE", "SIGKILL", /* 1-7 */"SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM", "SIGUR1", "SIGUSR2", /* 8-13 */}; main(int argc, char **argv){	int signo, pid, res;	int errlev; 	errlev = 0;	if (argc <= 1) {	usage:		fprintf(stderr, "usage: kill [ -sig ] pid ...\n");		fprintf(stderr, "for a list of signals: kill -l\n");		exit(2);	}	if (*argv[1] == '-') {		if (argv[1][1] == 'l') {			int i = 0;			for (signo = 1; signo <= NSIG; signo++)				if (signm[signo]) {					printf("%s ", signm[signo]);					if (++i%8 == 0)						printf("\n");				}			if(i%8 !=0)				printf("\n");			exit(0);		} else if (isdigit(argv[1][1])) {			signo = atoi(argv[1]+1);			if (signo < 0 || signo > NSIG) {				fprintf(stderr, "kill: %s: number out of range\n",				    argv[1]);				exit(1);			}		} else {			char *name = argv[1]+1;			for (signo = 1; signo <= NSIG; signo++)				if (signm[signo] && (				    !strcmp(signm[signo], name)||				    !strcmp(signm[signo]+3, name)))					goto foundsig;			fprintf(stderr, "kill: %s: unknown signal; kill -l lists signals\n", name);			exit(1);foundsig:			;		}		argc--;		argv++;	} else		signo = SIGTERM;	argv++;	while (argc > 1) {		if ((**argv<'0' || **argv>'9') && **argv!='-')			goto usage;		res = kill(pid = atoi(*argv), signo);		if (res<0) {			perror("kill");		}		argc--;		argv++;	}	return(errlev);}