UNIX 7th Ed. - /usr/src/cmd/kill.c

   1: /*
   2:  * kill - send signal to process
   3:  */
   4: 
   5: #include <signal.h>
   6: 
   7: main(argc, argv)
   8: char **argv;
   9: {
  10:     register signo, pid, res;
  11:     int errlev;
  12:     extern char *sys_errlist[];
  13:     extern errno;
  14: 
  15:     errlev = 0;
  16:     if (argc <= 1) {
  17:     usage:
  18:         printf("usage: kill [ -signo ] pid ...\n");
  19:         exit(2);
  20:     }
  21:     if (*argv[1] == '-') {
  22:         signo = atoi(argv[1]+1);
  23:         argc--;
  24:         argv++;
  25:     } else
  26:         signo = SIGTERM;
  27:     argv++;
  28:     while (argc > 1) {
  29:         if (**argv<'0' || **argv>'9')
  30:             goto usage;
  31:         res = kill(pid = atoi(*argv), signo);
  32:         if (res<0) {
  33:             printf("%u: %s\n", pid, sys_errlist[errno]);
  34:             errlev = 1;
  35:         }
  36:         argc--;
  37:         argv++;
  38:     }
  39:     return(errlev);
  40: }

Defined functions