commands/dirname/dirname.c

   1 /* dirname - extract the directory name from a path     Author: Peter Holzer */
   2
   3 /* Dirname -- extract directory part from a path name
   4  *
   5  * Peter Holzer (hp@vmars.tuwien.ac.at)
   6  *
   7  * $Log$
   8  * Revision 1.1  2005/04/21 14:55:21  beng
   9  * Initial revision
  10  *
  11  * Revision 1.1.1.1  2005/04/20 13:33:30  beng
  12  * Initial import of minix 2.0.4
  13  *
  14  * Revision 1.1  1994/02/12  16:15:02  hjp
  15  * Initial revision
  16  *
  17  */
  18
  19 #include <string.h>
  20 #include <stdio.h>
  21
  22 int main(int argc, char **argv)
  23 {
  24   char *p;
  25   char *path;
  26
  27   if (argc != 2) {
  28         fprintf(stderr, "Usage: %s path\n", argv[0]);
  29         return(1);
  30   }
  31   path = argv[1];
  32   p = path + strlen(path);
  33   while (p > path && p[-1] == '/') p--; /* trailing slashes */
  34   while (p > path && p[-1] != '/') p--; /* last component */
  35   while (p > path && p[-1] == '/') p--; /* trailing slashes */
  36   if (p == path) {
  37         printf(path[0] == '/' ? "/\n" : ".\n");
  38   } else {
  39         printf("%.*s\n", (int) (p - path), path);
  40   }
  41   return(0);
  42 }