|
5
|
1 /* makepath.c -- Ensure that a directory path exists. |
|
|
2 Copyright (C) 1990 Free Software Foundation, Inc. |
|
|
3 |
|
|
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) |
|
|
7 any later version. |
|
|
8 |
|
|
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. |
|
|
13 |
|
|
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. */ |
|
|
17 |
|
|
18 /* Written by David MacKenzie <djm@gnu.ai.mit.edu> and |
|
|
19 Jim Meyering <meyering@cs.utexas.edu>. */ |
|
|
20 |
|
|
21 #ifdef __GNUC__ |
|
|
22 #define alloca __builtin_alloca |
|
|
23 #else |
|
|
24 #ifdef HAVE_ALLOCA_H |
|
|
25 #include <alloca.h> |
|
|
26 #else |
|
|
27 #ifdef _AIX |
|
|
28 #pragma alloca |
|
|
29 #else |
|
|
30 char *alloca (); |
|
|
31 #endif |
|
|
32 #endif |
|
|
33 #endif |
|
|
34 |
|
|
35 #include <stdio.h> |
|
|
36 #include <sys/types.h> |
|
|
37 #include <sys/stat.h> |
|
|
38 #ifdef HAVE_UNISTD_H |
|
|
39 #include <unistd.h> |
|
|
40 #endif |
|
|
41 #if !defined(S_ISDIR) && defined(S_IFDIR) |
|
|
42 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) |
|
|
43 #endif |
|
|
44 |
|
|
45 #ifdef STDC_HEADERS |
|
|
46 #include <errno.h> |
|
|
47 #include <stdlib.h> |
|
|
48 #else |
|
|
49 extern int errno; |
|
|
50 #endif |
|
|
51 |
|
20
|
52 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H) |
|
5
|
53 #include <string.h> |
|
|
54 #define index strchr |
|
|
55 #else |
|
|
56 #include <strings.h> |
|
|
57 #endif |
|
|
58 |
|
|
59 #ifdef __MSDOS__ |
|
|
60 typedef int uid_t; |
|
|
61 typedef int gid_t; |
|
|
62 #endif |
|
|
63 |
|
|
64 void error (); |
|
|
65 |
|
|
66 /* Ensure that the directory ARGPATH exists. |
|
|
67 Remove any trailing slashes from ARGPATH before calling this function. |
|
|
68 |
|
|
69 Make any leading directories that don't already exist, with |
|
|
70 permissions PARENT_MODE. |
|
|
71 If the last element of ARGPATH does not exist, create it as |
|
|
72 a new directory with permissions MODE. |
|
|
73 If OWNER and GROUP are non-negative, make them the UID and GID of |
|
|
74 created directories. |
|
|
75 If VERBOSE_FMT_STRING is nonzero, use it as a printf format |
|
|
76 string for printing a message after successfully making a directory, |
|
|
77 with the name of the directory that was just made as an argument. |
|
|
78 |
|
|
79 Return 0 if ARGPATH exists as a directory with the proper |
|
|
80 ownership and permissions when done, otherwise 1. */ |
|
|
81 |
|
|
82 int |
|
|
83 make_path (argpath, mode, parent_mode, owner, group, verbose_fmt_string) |
|
|
84 char *argpath; |
|
|
85 int mode; |
|
|
86 int parent_mode; |
|
|
87 uid_t owner; |
|
|
88 gid_t group; |
|
|
89 char *verbose_fmt_string; |
|
|
90 { |
|
|
91 char *dirpath; /* A copy we can scribble NULs on. */ |
|
|
92 struct stat stats; |
|
|
93 int retval = 0; |
|
|
94 int oldmask = umask (0); |
|
|
95 |
|
|
96 dirpath = alloca (strlen (argpath) + 1); |
|
|
97 strcpy (dirpath, argpath); |
|
|
98 |
|
|
99 if (stat (dirpath, &stats)) |
|
|
100 { |
|
|
101 char *slash; |
|
|
102 int tmp_mode; /* Initial perms for leading dirs. */ |
|
|
103 int re_protect; /* Should leading dirs be unwritable? */ |
|
|
104 struct ptr_list |
|
|
105 { |
|
|
106 char *dirname_end; |
|
|
107 struct ptr_list *next; |
|
|
108 }; |
|
|
109 struct ptr_list *p, *leading_dirs = NULL; |
|
|
110 |
|
|
111 /* If leading directories shouldn't be writable or executable, |
|
|
112 or should have set[ug]id or sticky bits set and we are setting |
|
|
113 their owners, we need to fix their permissions after making them. */ |
|
|
114 if (((parent_mode & 0300) != 0300) |
|
|
115 || (owner != (uid_t) -1 && group != (gid_t) -1 |
|
|
116 && (parent_mode & 07000) != 0)) |
|
|
117 { |
|
|
118 tmp_mode = 0700; |
|
|
119 re_protect = 1; |
|
|
120 } |
|
|
121 else |
|
|
122 { |
|
|
123 tmp_mode = parent_mode; |
|
|
124 re_protect = 0; |
|
|
125 } |
|
|
126 |
|
|
127 slash = dirpath; |
|
|
128 while (*slash == '/') |
|
|
129 slash++; |
|
20
|
130 while ((slash = index (slash, '/'))) |
|
5
|
131 { |
|
|
132 *slash = '\0'; |
|
|
133 if (stat (dirpath, &stats)) |
|
|
134 { |
|
|
135 if (mkdir (dirpath, tmp_mode)) |
|
|
136 { |
|
|
137 error (0, errno, "cannot make directory `%s'", dirpath); |
|
|
138 umask (oldmask); |
|
|
139 return 1; |
|
|
140 } |
|
|
141 else |
|
|
142 { |
|
|
143 if (verbose_fmt_string != NULL) |
|
|
144 error (0, 0, verbose_fmt_string, dirpath); |
|
|
145 |
|
|
146 if (owner != (uid_t) -1 && group != (gid_t) -1 |
|
|
147 && chown (dirpath, owner, group) |
|
|
148 #ifdef AFS |
|
|
149 && errno != EPERM |
|
|
150 #endif |
|
|
151 ) |
|
|
152 { |
|
|
153 error (0, errno, "%s", dirpath); |
|
|
154 retval = 1; |
|
|
155 } |
|
|
156 if (re_protect) |
|
|
157 { |
|
|
158 struct ptr_list *new = (struct ptr_list *) |
|
|
159 alloca (sizeof (struct ptr_list)); |
|
|
160 new->dirname_end = slash; |
|
|
161 new->next = leading_dirs; |
|
|
162 leading_dirs = new; |
|
|
163 } |
|
|
164 } |
|
|
165 } |
|
|
166 else if (!S_ISDIR (stats.st_mode)) |
|
|
167 { |
|
|
168 error (0, 0, "`%s' exists but is not a directory", dirpath); |
|
|
169 umask (oldmask); |
|
|
170 return 1; |
|
|
171 } |
|
|
172 |
|
|
173 *slash++ = '/'; |
|
|
174 |
|
|
175 /* Avoid unnecessary calls to `stat' when given |
|
|
176 pathnames containing multiple adjacent slashes. */ |
|
|
177 while (*slash == '/') |
|
|
178 slash++; |
|
|
179 } |
|
|
180 |
|
|
181 /* We're done making leading directories. |
|
|
182 Make the final component of the path. */ |
|
|
183 |
|
|
184 if (mkdir (dirpath, mode)) |
|
|
185 { |
|
|
186 error (0, errno, "cannot make directory `%s'", dirpath); |
|
|
187 umask (oldmask); |
|
|
188 return 1; |
|
|
189 } |
|
|
190 if (verbose_fmt_string != NULL) |
|
|
191 error (0, 0, verbose_fmt_string, dirpath); |
|
|
192 |
|
|
193 if (owner != (uid_t) -1 && group != (gid_t) -1) |
|
|
194 { |
|
|
195 if (chown (dirpath, owner, group) |
|
|
196 #ifdef AFS |
|
|
197 && errno != EPERM |
|
|
198 #endif |
|
|
199 ) |
|
|
200 { |
|
|
201 error (0, errno, "%s", dirpath); |
|
|
202 retval = 1; |
|
|
203 } |
|
|
204 /* chown may have turned off some permission bits we wanted. */ |
|
|
205 if ((mode & 07000) != 0 && chmod (dirpath, mode)) |
|
|
206 { |
|
|
207 error (0, errno, "%s", dirpath); |
|
|
208 retval = 1; |
|
|
209 } |
|
|
210 } |
|
|
211 |
|
|
212 /* If the mode for leading directories didn't include owner "wx" |
|
|
213 privileges, we have to reset their protections to the correct |
|
|
214 value. */ |
|
|
215 for (p = leading_dirs; p != NULL; p = p->next) |
|
|
216 { |
|
|
217 *(p->dirname_end) = '\0'; |
|
|
218 if (chmod (dirpath, parent_mode)) |
|
|
219 { |
|
|
220 error (0, errno, "%s", dirpath); |
|
|
221 retval = 1; |
|
|
222 } |
|
|
223 } |
|
|
224 } |
|
|
225 else |
|
|
226 { |
|
|
227 /* We get here if the entire path already exists. */ |
|
|
228 |
|
|
229 if (!S_ISDIR (stats.st_mode)) |
|
|
230 { |
|
|
231 error (0, 0, "`%s' exists but is not a directory", dirpath); |
|
|
232 umask (oldmask); |
|
|
233 return 1; |
|
|
234 } |
|
|
235 |
|
|
236 /* chown must precede chmod because on some systems, |
|
|
237 chown clears the set[ug]id bits for non-superusers, |
|
|
238 resulting in incorrect permissions. |
|
|
239 On System V, users can give away files with chown and then not |
|
|
240 be able to chmod them. So don't give files away. */ |
|
|
241 |
|
|
242 if (owner != (uid_t) -1 && group != (gid_t) -1 |
|
|
243 && chown (dirpath, owner, group) |
|
|
244 #ifdef AFS |
|
|
245 && errno != EPERM |
|
|
246 #endif |
|
|
247 ) |
|
|
248 { |
|
|
249 error (0, errno, "%s", dirpath); |
|
|
250 retval = 1; |
|
|
251 } |
|
|
252 if (chmod (dirpath, mode)) |
|
|
253 { |
|
|
254 error (0, errno, "%s", dirpath); |
|
|
255 retval = 1; |
|
|
256 } |
|
|
257 } |
|
|
258 |
|
|
259 umask (oldmask); |
|
|
260 return retval; |
|
|
261 } |
