lib-src/make-path.c

   1 /* Make all the directories along a path.
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* This program works like mkdir, except that it generates
  21    intermediate directories if they don't exist.  This is just like
  22    the `mkdir -p' command on most systems; unfortunately, the mkdir
  23    command on some of the purer BSD systems (like Mt. Xinu) don't have
  24    that option. */
  25
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <stdio.h>
  29 #include <errno.h>
  30
  31 extern int errno;
  32
  33 char *prog_name;
  34
  35 int touchy_mkdir (path)
  36      char *path;
  37 {
  38   struct stat buf;
  39
  40   /* If PATH already exists and is a directory, return success.  */
  41   if (stat (path, &buf) >= 0
  42       && (buf.st_mode & S_IFMT) == S_IFDIR)
  43     return 0;
  44
  45   /* Otherwise, try to make it.  If PATH exists but isn't a directory,
  46      this will signal an error.  */
  47   if (mkdir (path, 0777) < 0)
  48     {
  49       fprintf (stderr, "%s: ", prog_name);
  50       perror (path);
  51       return -1;
  52     }
  53
  54   return 0;
  55 }
  56
  57 int
  58 main (argc, argv)
  59      int argc;
  60      char **argv;
  61 {
  62   prog_name = *argv;
  63
  64   for (argc--, argv++; argc > 0; argc--, argv++)
  65     {
  66       char *path = *argv;
  67       int i;
  68
  69       /* Stop at each slash in path and try to create the directory.
  70          Skip any initial slash.  */
  71       for (i = (path[0] == '/') ? 1 : 0; path[i]; i++)
  72         if (path[i] == '/')
  73           {
  74             path[i] = '\0';
  75             if (touchy_mkdir (path) < 0)
  76               goto next_pathname;
  77             path[i] = '/';
  78           }
  79
  80       touchy_mkdir (path);
  81
  82     next_pathname:
  83       ;
  84     }
  85
  86   return 0;
  87 }