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>. */
26 #define alloca __builtin_alloca
40 #include <sys/types.h>
46 #ifdef STAT_MACROS_BROKEN
48 #endif /* STAT_MACROS_BROKEN. */
50 #if !defined(S_ISDIR) && defined(S_IFDIR)
51 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
66 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
80 #include "safe-stat.h"
83 /* Ensure that the directory ARGPATH exists.
84 Remove any trailing slashes from ARGPATH before calling this function.
86 Make any leading directories that don't already exist, with
87 permissions PARENT_MODE.
88 If the last element of ARGPATH does not exist, create it as
89 a new directory with permissions MODE.
90 If OWNER and GROUP are non-negative, make them the UID and GID of
92 If VERBOSE_FMT_STRING is nonzero, use it as a printf format
93 string for printing a message after successfully making a directory,
94 with the name of the directory that was just made as an argument.
96 Return 0 if ARGPATH exists as a directory with the proper
97 ownership and permissions when done, otherwise 1. */
100 make_path (argpath, mode, parent_mode, owner, group, verbose_fmt_string)
106 char *verbose_fmt_string;
108 char *dirpath; /* A copy we can scribble NULs on. */
111 int oldmask = umask (0);
113 dirpath = (char *) alloca (strlen (argpath) + 1);
114 strcpy (dirpath, argpath);
116 if (SAFE_STAT (dirpath, &stats))
119 int tmp_mode; /* Initial perms for leading dirs. */
120 int re_protect; /* Should leading dirs be unwritable? */
124 struct ptr_list *next;
126 struct ptr_list *p, *leading_dirs = NULL;
128 /* If leading directories shouldn't be writable or executable,
129 or should have set[ug]id or sticky bits set and we are setting
130 their owners, we need to fix their permissions after making them. */
131 if (((parent_mode & 0300) != 0300)
132 || (owner != (uid_t) -1 && group != (gid_t) -1
133 && (parent_mode & 07000) != 0))
140 tmp_mode = parent_mode;
145 while (*slash == '/')
147 while ((slash = index (slash, '/')))
150 if (SAFE_STAT (dirpath, &stats))
152 if (mkdir (dirpath, tmp_mode))
154 error (0, errno, "cannot make directory `%s'", dirpath);
160 if (verbose_fmt_string != NULL)
161 error (0, 0, verbose_fmt_string, dirpath);
163 if (owner != (uid_t) -1 && group != (gid_t) -1
164 && chown (dirpath, owner, group)
165 #if defined(AFS) && defined (EPERM)
170 error (0, errno, "%s", dirpath);
175 struct ptr_list *new = (struct ptr_list *)
176 alloca (sizeof (struct ptr_list));
177 new->dirname_end = slash;
178 new->next = leading_dirs;
183 else if (!S_ISDIR (stats.st_mode))
185 error (0, 0, "`%s' exists but is not a directory", dirpath);
192 /* Avoid unnecessary calls to `stat' when given
193 pathnames containing multiple adjacent slashes. */
194 while (*slash == '/')
198 /* We're done making leading directories.
199 Make the final component of the path. */
201 /* The path could end in "/." or contain "/..", so test
202 if we really have to create the directory. */
204 if (SAFE_STAT (dirpath, &stats) && mkdir (dirpath, mode))
206 error (0, errno, "cannot make directory `%s'", dirpath);
210 if (verbose_fmt_string != NULL)
211 error (0, 0, verbose_fmt_string, dirpath);
213 if (owner != (uid_t) -1 && group != (gid_t) -1)
215 if (chown (dirpath, owner, group)
221 error (0, errno, "%s", dirpath);
224 /* chown may have turned off some permission bits we wanted. */
225 if ((mode & 07000) != 0 && chmod (dirpath, mode))
227 error (0, errno, "%s", dirpath);
232 /* If the mode for leading directories didn't include owner "wx"
233 privileges, we have to reset their protections to the correct
235 for (p = leading_dirs; p != NULL; p = p->next)
237 *(p->dirname_end) = '\0';
238 if (chmod (dirpath, parent_mode))
240 error (0, errno, "%s", dirpath);
247 /* We get here if the entire path already exists. */
249 if (!S_ISDIR (stats.st_mode))
251 error (0, 0, "`%s' exists but is not a directory", dirpath);
256 /* chown must precede chmod because on some systems,
257 chown clears the set[ug]id bits for non-superusers,
258 resulting in incorrect permissions.
259 On System V, users can give away files with chown and then not
260 be able to chmod them. So don't give files away. */
262 if (owner != (uid_t) -1 && group != (gid_t) -1
263 && chown (dirpath, owner, group)
269 error (0, errno, "%s", dirpath);
272 if (chmod (dirpath, mode))
274 error (0, errno, "%s", dirpath);