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 2, 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 /* Create directory DIRNAME if it does not exist already.
  36    Then give permission for everyone to read and search it.
  37    Return 0 if successful, 1 if not.  */
  38
  39 int
  40 touchy_mkdir (dirname)
  41      char *dirname;
  42 {
  43   struct stat buf;
  44
  45   /* If DIRNAME already exists and is a directory, don't create.  */
  46   if (! (stat (dirname, &buf) >= 0
  47          && (buf.st_mode & S_IFMT) == S_IFDIR))
  48     {
  49       /* Otherwise, try to make it.  If DIRNAME exists but isn't a directory,
  50          this will signal an error.  */
  51       if (mkdir (dirname, 0777) < 0)
  52         {
  53           fprintf (stderr, "%s: ", prog_name);
  54           perror (dirname);
  55           return 1;
  56         }
  57     }
  58
  59   /* Make sure everyone can look at this directory.  */
  60   if (stat (dirname, &buf) < 0)
  61     {
  62       fprintf (stderr, "%s: ", prog_name);
  63       perror (dirname);
  64       return 1;
  65     }
  66   if (chmod (dirname, 0555 | (buf.st_mode & 0777)) < 0)
  67     {
  68       fprintf (stderr, "%s: ", prog_name);
  69       perror (dirname);
  70     }
  71
  72   return 0;
  73 }
  74
  75 int
  76 main (argc, argv)
  77      int argc;
  78      char **argv;
  79 {
  80   prog_name = *argv;
  81
  82   for (argc--, argv++; argc > 0; argc--, argv++)
  83     {
  84       char *dirname = *argv;
  85       int i;
  86
  87       /* Stop at each slash in dirname and try to create the directory.
  88          Skip any initial slash.  */
  89       for (i = (dirname[0] == '/') ? 1 : 0; dirname[i]; i++)
  90         if (dirname[i] == '/')
  91           {
  92             dirname[i] = '\0';
  93             if (touchy_mkdir (dirname) < 0)
  94               goto next_dirname;
  95             dirname[i] = '/';
  96           }
  97
  98       touchy_mkdir (dirname);
  99
 100     next_dirname:
 101       ;
 102     }
 103
 104   return 0;
 105 }