1 /* makepath.c -- Ensure that a directory path exists.
2 Copyright (C) 1990 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu> and
19 Jim Meyering <meyering@cs.utexas.edu>. */
22 #define alloca __builtin_alloca
36 #include <sys/types.h>
42 #ifdef STAT_MACROS_BROKEN
46 #endif /* STAT_MACROS_BROKEN. */
48 #if !defined(S_ISDIR) && defined(S_IFDIR)
49 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
64 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
80 /* Ensure that the directory ARGPATH exists.
81 Remove any trailing slashes from ARGPATH before calling this function.
83 Make any leading directories that don't already exist, with
84 permissions PARENT_MODE.
85 If the last element of ARGPATH does not exist, create it as
86 a new directory with permissions MODE.
87 If OWNER and GROUP are non-negative, make them the UID and GID of
89 If VERBOSE_FMT_STRING is nonzero, use it as a printf format
90 string for printing a message after successfully making a directory,
91 with the name of the directory that was just made as an argument.
93 Return 0 if ARGPATH exists as a directory with the proper
94 ownership and permissions when done, otherwise 1. */
97 make_path (argpath, mode, parent_mode, owner, group, verbose_fmt_string)
103 char *verbose_fmt_string;
105 char *dirpath; /* A copy we can scribble NULs on. */
108 int oldmask = umask (0);
110 dirpath = (char *) alloca (strlen (argpath) + 1);
111 strcpy (dirpath, argpath);
113 if (stat (dirpath, &stats))
116 int tmp_mode; /* Initial perms for leading dirs. */
117 int re_protect; /* Should leading dirs be unwritable? */
121 struct ptr_list *next;
123 struct ptr_list *p, *leading_dirs = NULL;
125 /* If leading directories shouldn't be writable or executable,
126 or should have set[ug]id or sticky bits set and we are setting
127 their owners, we need to fix their permissions after making them. */
128 if (((parent_mode & 0300) != 0300)
129 || (owner != (uid_t) -1 && group != (gid_t) -1
130 && (parent_mode & 07000) != 0))
137 tmp_mode = parent_mode;
142 while (*slash == '/')
144 while ((slash = index (slash, '/')))
147 if (stat (dirpath, &stats))
149 if (mkdir (dirpath, tmp_mode))
151 error (0, errno, "cannot make directory `%s'", dirpath);
157 if (verbose_fmt_string != NULL)
158 error (0, 0, verbose_fmt_string, dirpath);
160 if (owner != (uid_t) -1 && group != (gid_t) -1
161 && chown (dirpath, owner, group)
162 #if defined(AFS) && defined (EPERM)
167 error (0, errno, "%s", dirpath);
172 struct ptr_list *new = (struct ptr_list *)
173 alloca (sizeof (struct ptr_list));
174 new->dirname_end = slash;
175 new->next = leading_dirs;
180 else if (!S_ISDIR (stats.st_mode))
182 error (0, 0, "`%s' exists but is not a directory", dirpath);
189 /* Avoid unnecessary calls to `stat' when given
190 pathnames containing multiple adjacent slashes. */
191 while (*slash == '/')
195 /* We're done making leading directories.
196 Make the final component of the path. */
198 if (mkdir (dirpath, mode))
200 error (0, errno, "cannot make directory `%s'", dirpath);
204 if (verbose_fmt_string != NULL)
205 error (0, 0, verbose_fmt_string, dirpath);
207 if (owner != (uid_t) -1 && group != (gid_t) -1)
209 if (chown (dirpath, owner, group)
215 error (0, errno, "%s", dirpath);
218 /* chown may have turned off some permission bits we wanted. */
219 if ((mode & 07000) != 0 && chmod (dirpath, mode))
221 error (0, errno, "%s", dirpath);
226 /* If the mode for leading directories didn't include owner "wx"
227 privileges, we have to reset their protections to the correct
229 for (p = leading_dirs; p != NULL; p = p->next)
231 *(p->dirname_end) = '\0';
232 if (chmod (dirpath, parent_mode))
234 error (0, errno, "%s", dirpath);
241 /* We get here if the entire path already exists. */
243 if (!S_ISDIR (stats.st_mode))
245 error (0, 0, "`%s' exists but is not a directory", dirpath);
250 /* chown must precede chmod because on some systems,
251 chown clears the set[ug]id bits for non-superusers,
252 resulting in incorrect permissions.
253 On System V, users can give away files with chown and then not
254 be able to chmod them. So don't give files away. */
256 if (owner != (uid_t) -1 && group != (gid_t) -1
257 && chown (dirpath, owner, group)
263 error (0, errno, "%s", dirpath);
266 if (chmod (dirpath, mode))
268 error (0, errno, "%s", dirpath);