sys/src/ape/cmd/kill.c

   1 #include <stdlib.h>
   2 #include <sys/types.h>
   3 #include <unistd.h>
   4 #include <signal.h>
   5 #include <ctype.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8
   9 #define NSIG SIGUSR2
  10
  11 char *signm[NSIG+1] = { 0,
  12 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGABRT", "SIGFPE", "SIGKILL", /* 1-7 */
  13 "SIGSEGV", "SIGPIPE", "SIGALRM", "SIGTERM", "SIGUR1", "SIGUSR2", /* 8-13 */
  14 };
  15
  16 main(int argc, char **argv)
  17 {
  18         int signo, pid, res;
  19         int errlev;
  20
  21         errlev = 0;
  22         if (argc <= 1) {
  23         usage:
  24                 fprintf(stderr, "usage: kill [ -sig ] pid ...\n");
  25                 fprintf(stderr, "for a list of signals: kill -l\n");
  26                 exit(2);
  27         }
  28         if (*argv[1] == '-') {
  29                 if (argv[1][1] == 'l') {
  30                         int i = 0;
  31                         for (signo = 1; signo <= NSIG; signo++)
  32                                 if (signm[signo]) {
  33                                         printf("%s ", signm[signo]);
  34                                         if (++i%8 == 0)
  35                                                 printf("\n");
  36                                 }
  37                         if(i%8 !=0)
  38                                 printf("\n");
  39                         exit(0);
  40                 } else if (isdigit(argv[1][1])) {
  41                         signo = atoi(argv[1]+1);
  42                         if (signo < 0 || signo > NSIG) {
  43                                 fprintf(stderr, "kill: %s: number out of range\n",
  44                                     argv[1]);
  45                                 exit(1);
  46                         }
  47                 } else {
  48                         char *name = argv[1]+1;
  49                         for (signo = 1; signo <= NSIG; signo++)
  50                                 if (signm[signo] && (
  51                                     !strcmp(signm[signo], name)||
  52                                     !strcmp(signm[signo]+3, name)))
  53                                         goto foundsig;
  54                         fprintf(stderr, "kill: %s: unknown signal; kill -l lists signals\n", name);
  55                         exit(1);
  56 foundsig:
  57                         ;
  58                 }
  59                 argc--;
  60                 argv++;
  61         } else
  62                 signo = SIGTERM;
  63         argv++;
  64         while (argc > 1) {
  65                 if ((**argv<'0' || **argv>'9') && **argv!='-')
  66                         goto usage;
  67                 res = kill(pid = atoi(*argv), signo);
  68                 if (res<0) {
  69                         perror("kill");
  70                 }
  71                 argc--;
  72                 argv++;
  73         }
  74         return(errlev);
  75 }