root/gc/if_not_there.c

DEFINITIONS

1. main

   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 #ifdef __DJGPP__
   8 #include <dirent.h>
   9 #endif /* __DJGPP__ */
  11 int main(argc, argv, envp)
  12 int argc;
  13 char ** argv;
  14 char ** envp;
  15 {
FILE * f;
  17 #ifdef __DJGPP__
DIR * d;
  19 #endif /* __DJGPP__ */
  20     if (argc < 3) goto Usage;
  21     if ((f = fopen(argv[1], "rb")) != 0
  22         || (f = fopen(argv[1], "r")) != 0) {
fclose(f);
  24         return(0);
  25     }
  26 #ifdef __DJGPP__
  27     if ((d = opendir(argv[1])) != 0) {
closedir(d);
  29             return(0);
  30     }
  31 #endif
printf("^^^^Starting command^^^^\n");
fflush(stdout);
execvp(argv[2], argv+2);
exit(1);
Usage:
fprintf(stderr, "Usage: %s file_name command\n", argv[0]);
  39     return(1);
  40 }