1 /*
2 * chattr.c - Change file attributes on an ext2 file system
3 *
4 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
5 * Laboratoire MASI, Institut Blaise Pascal
6 * Universite Pierre et Marie Curie (Paris VI)
7 *
8 * This file can be redistributed under the terms of the GNU General
9 * Public License
10 */
11
12 /*
13 * History:
14 * 93/10/30 - Creation
15 * 93/11/13 - Replace stat() calls by lstat() to avoid loops
16 * 94/02/27 - Integrated in Ted's distribution
17 * 98/12/29 - Ignore symlinks when working recursively (G M Sipe)
18 * 98/12/29 - Display version info only when -V specified (G M Sipe)
19 */
20
21 #define _LARGEFILE64_SOURCE
22
23 #include <sys/types.h>
24 #include <dirent.h>
25 #include <fcntl.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <string.h>
30 #ifdef HAVE_ERRNO_H
31 #include <errno.h>
32 #endif
33 #include <sys/param.h>
34 #include <sys/stat.h>
35 #include "ext2fs/ext2_fs.h"
36
37 #ifdef __GNUC__
38 #define EXT2FS_ATTR(x) __attribute__(x)
39 #else
40 #define EXT2FS_ATTR(x)
41 #endif
42
43 #ifndef S_ISLNK /* So we can compile even with gcc-warn */
44 # ifdef __S_IFLNK
45 # define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
46 # else
47 # define S_ISLNK(mode) 0
48 # endif
49 #endif
50
51 #include "et/com_err.h"
52 #include "e2p/e2p.h"
53
54 #include "../version.h"
55 #include "nls-enable.h"
56
57 static const char * program_name = "chattr";
58
59 static int add;
60 static int rem;
61 static int set;
62 static int set_version;
63
64 static unsigned long version;
65
66 static int recursive;
67 static int verbose;
68 static int silent;
69
70 static unsigned long af;
71 static unsigned long rf;
72 static unsigned long sf;
73
74 #ifdef _LFS64_LARGEFILE
75 #define LSTAT lstat64
76 #define STRUCT_STAT struct stat64
77 #else
78 #define LSTAT lstat
79 #define STRUCT_STAT struct stat
80 #endif
81
usage(void)82 static void usage(void)
83 {
84 fprintf(stderr,
85 _("Usage: %s [-RVf] [-+=AacDdeijsSu] [-v version] files...\n"),
86 program_name);
87 exit(1);
88 }
89
90 struct flags_char {
91 unsigned long flag;
92 char optchar;
93 };
94
95 static const struct flags_char flags_array[] = {
96 { EXT2_NOATIME_FL, 'A' },
97 { EXT2_SYNC_FL, 'S' },
98 { EXT2_DIRSYNC_FL, 'D' },
99 { EXT2_APPEND_FL, 'a' },
100 { EXT2_COMPR_FL, 'c' },
101 { EXT2_NODUMP_FL, 'd' },
102 { EXT4_EXTENTS_FL, 'e'},
103 { EXT2_IMMUTABLE_FL, 'i' },
104 { EXT3_JOURNAL_DATA_FL, 'j' },
105 { EXT2_SECRM_FL, 's' },
106 { EXT2_UNRM_FL, 'u' },
107 { EXT2_NOTAIL_FL, 't' },
108 { EXT2_TOPDIR_FL, 'T' },
109 { 0, 0 }
110 };
111
get_flag(char c)112 static unsigned long get_flag(char c)
113 {
114 const struct flags_char *fp;
115
116 for (fp = flags_array; fp->flag != 0; fp++) {
117 if (fp->optchar == c)
118 return fp->flag;
119 }
120 return 0;
121 }
122
123
decode_arg(int * i,int argc,char ** argv)124 static int decode_arg (int * i, int argc, char ** argv)
125 {
126 char * p;
127 char * tmp;
128 unsigned long fl;
129
130 switch (argv[*i][0])
131 {
132 case '-':
133 for (p = &argv[*i][1]; *p; p++) {
134 if (*p == 'R') {
135 recursive = 1;
136 continue;
137 }
138 if (*p == 'V') {
139 verbose = 1;
140 continue;
141 }
142 if (*p == 'f') {
143 silent = 1;
144 continue;
145 }
146 if (*p == 'v') {
147 (*i)++;
148 if (*i >= argc)
149 usage ();
150 version = strtol (argv[*i], &tmp, 0);
151 if (*tmp) {
152 com_err (program_name, 0,
153 _("bad version - %s\n"),
154 argv[*i]);
155 usage ();
156 }
157 set_version = 1;
158 continue;
159 }
160 if ((fl = get_flag(*p)) == 0)
161 usage();
162 rf |= fl;
163 rem = 1;
164 }
165 break;
166 case '+':
167 add = 1;
168 for (p = &argv[*i][1]; *p; p++) {
169 if ((fl = get_flag(*p)) == 0)
170 usage();
171 af |= fl;
172 }
173 break;
174 case '=':
175 set = 1;
176 for (p = &argv[*i][1]; *p; p++) {
177 if ((fl = get_flag(*p)) == 0)
178 usage();
179 sf |= fl;
180 }
181 break;
182 default:
183 return EOF;
184 break;
185 }
186 return 1;
187 }
188
189 static int chattr_dir_proc(const char *, struct dirent *, void *);
190
change_attributes(const char * name)191 static int change_attributes(const char * name)
192 {
193 unsigned long flags;
194 STRUCT_STAT st;
195 int extent_file = 0;
196
197 if (LSTAT (name, &st) == -1) {
198 if (!silent)
199 com_err (program_name, errno,
200 _("while trying to stat %s"), name);
201 return -1;
202 }
203
204 if (fgetflags(name, &flags) == -1) {
205 if (!silent)
206 com_err(program_name, errno,
207 _("while reading flags on %s"), name);
208 return -1;
209 }
210 if (flags & EXT4_EXTENTS_FL)
211 extent_file = 1;
212 if (set) {
213 if (extent_file && !(sf & EXT4_EXTENTS_FL)) {
214 if (!silent)
215 com_err(program_name, 0,
216 _("Clearing extent flag not supported on %s"),
217 name);
218 return -1;
219 }
220 if (verbose) {
221 printf (_("Flags of %s set as "), name);
222 print_flags (stdout, sf, 0);
223 printf ("\n");
224 }
225 if (fsetflags (name, sf) == -1)
226 perror (name);
227 } else {
228 if (rem)
229 flags &= ~rf;
230 if (add)
231 flags |= af;
232 if (extent_file && !(flags & EXT4_EXTENTS_FL)) {
233 if (!silent)
234 com_err(program_name, 0,
235 _("Clearing extent flag not supported on %s"),
236 name);
237 return -1;
238 }
239 if (verbose) {
240 printf(_("Flags of %s set as "), name);
241 print_flags(stdout, flags, 0);
242 printf("\n");
243 }
244 if (!S_ISDIR(st.st_mode))
245 flags &= ~EXT2_DIRSYNC_FL;
246 if (fsetflags(name, flags) == -1) {
247 if (!silent) {
248 com_err(program_name, errno,
249 _("while setting flags on %s"),
250 name);
251 }
252 return -1;
253 }
254 }
255 if (set_version) {
256 if (verbose)
257 printf (_("Version of %s set as %lu\n"), name, version);
258 if (fsetversion (name, version) == -1) {
259 if (!silent)
260 com_err (program_name, errno,
261 _("while setting version on %s"),
262 name);
263 return -1;
264 }
265 }
266 if (S_ISDIR(st.st_mode) && recursive)
267 return iterate_on_dir (name, chattr_dir_proc, NULL);
268 return 0;
269 }
270
chattr_dir_proc(const char * dir_name,struct dirent * de,void * private EXT2FS_ATTR ((unused)))271 static int chattr_dir_proc (const char * dir_name, struct dirent * de,
272 void * private EXT2FS_ATTR((unused)))
273 {
274 int ret = 0;
275
276 if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
277 char *path;
278
279 path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
280 if (!path) {
281 fprintf(stderr, _("Couldn't allocate path variable "
282 "in chattr_dir_proc"));
283 return -1;
284 }
285 sprintf(path, "%s/%s", dir_name, de->d_name);
286 ret = change_attributes(path);
287 free(path);
288 }
289 return ret;
290 }
291
main(int argc,char ** argv)292 int main (int argc, char ** argv)
293 {
294 int i, j;
295 int end_arg = 0;
296 int err, retval = 0;
297
298 #ifdef ENABLE_NLS
299 setlocale(LC_MESSAGES, "");
300 setlocale(LC_CTYPE, "");
301 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
302 textdomain(NLS_CAT_NAME);
303 #endif
304 if (argc && *argv)
305 program_name = *argv;
306 i = 1;
307 while (i < argc && !end_arg) {
308 /* '--' arg should end option processing */
309 if (strcmp(argv[i], "--") == 0) {
310 i++;
311 end_arg = 1;
312 } else if (decode_arg (&i, argc, argv) == EOF)
313 end_arg = 1;
314 else
315 i++;
316 }
317 if (i >= argc)
318 usage ();
319 if (set && (add || rem)) {
320 fputs(_("= is incompatible with - and +\n"), stderr);
321 exit (1);
322 }
323 if ((rf & af) != 0) {
324 fputs("Can't both set and unset same flag.\n", stderr);
325 exit (1);
326 }
327 if (!(add || rem || set || set_version)) {
328 fputs(_("Must use '-v', =, - or +\n"), stderr);
329 exit (1);
330 }
331 if (verbose)
332 fprintf (stderr, "chattr %s (%s)\n",
333 E2FSPROGS_VERSION, E2FSPROGS_DATE);
334 for (j = i; j < argc; j++) {
335 err = change_attributes (argv[j]);
336 if (err)
337 retval = 1;
338 }
339 exit(retval);
340 }
341