boehm-gc/if_not_there.c

   1 /* Conditionally execute a command based if the file argv[1] doesn't exist */
   2 /* Except for execvp, we stick to ANSI C.                                  */
   3 # include "private/gcconfig.h"
   4 # include <stdio.h>
   5 # include <stdlib.h>
   6 # include <unistd.h>
   7
   8 int main(argc, argv, envp)
   9 int argc;
  10 char ** argv;
  11 char ** envp;
  12 {
  13     FILE * f;
  14     if (argc < 3) goto Usage;
  15     if ((f = fopen(argv[1], "rb")) != 0
  16         || (f = fopen(argv[1], "r")) != 0) {
  17         fclose(f);
  18         return(0);
  19     }
  20     printf("^^^^Starting command^^^^\n");
  21     fflush(stdout);
  22     execvp(argv[2], argv+2);
  23     exit(1);
  24
  25 Usage:
  26     fprintf(stderr, "Usage: %s file_name command\n", argv[0]);
  27     return(1);
  28 }
  29