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 "config.h"
24 #include <sys/types.h>
25 #include <dirent.h>
26 #include <fcntl.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <string.h>
31 #ifdef HAVE_ERRNO_H
32 #include <errno.h>
33 #endif
34 #include <sys/param.h>
35 #include <sys/stat.h>
36 #include "ext2fs/ext2_fs.h"
37
38 #ifdef __GNUC__
39 #define EXT2FS_ATTR(x) __attribute__(x)
40 #else
41 #define EXT2FS_ATTR(x)
42 #endif
43
44 #ifndef S_ISLNK /* So we can compile even with gcc-warn */
45 # ifdef __S_IFLNK
46 # define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
47 # else
48 # define S_ISLNK(mode) 0
49 # endif
50 #endif
51
52 #include "et/com_err.h"
53 #include "e2p/e2p.h"
54 #include "support/nls-enable.h"
55
56 #include "../version.h"
57
58 static const char * program_name = "chattr";
59
60 static int add;
61 static int rem;
62 static int set;
63 static int set_version;
64
65 static unsigned long version;
66
67 static int set_project;
68 static unsigned long project;
69
70 static int recursive;
71 static int verbose;
72 static int silent;
73
74 static unsigned long af;
75 static unsigned long rf;
76 static unsigned long sf;
77
78 #ifdef _LFS64_LARGEFILE
79 #define LSTAT lstat64
80 #define STRUCT_STAT struct stat64
81 #else
82 #define LSTAT lstat
83 #define STRUCT_STAT struct stat
84 #endif
85
usage(void)86 static void usage(void)
87 {
88 fprintf(stderr,
89 _("Usage: %s [-pRVf] [-+=aAcCdDeijPsStTuFx] [-v version] files...\n"),
90 program_name);
91 exit(1);
92 }
93
94 struct flags_char {
95 unsigned long flag;
96 char optchar;
97 };
98
99 static const struct flags_char flags_array[] = {
100 { EXT2_NOATIME_FL, 'A' },
101 { EXT2_SYNC_FL, 'S' },
102 { EXT2_DIRSYNC_FL, 'D' },
103 { EXT2_APPEND_FL, 'a' },
104 { EXT2_COMPR_FL, 'c' },
105 { EXT2_NOCOMPR_FL, 'm' },
106 { EXT2_NODUMP_FL, 'd' },
107 { EXT4_EXTENTS_FL, 'e'},
108 { EXT2_IMMUTABLE_FL, 'i' },
109 { EXT3_JOURNAL_DATA_FL, 'j' },
110 { EXT4_PROJINHERIT_FL, 'P' },
111 { EXT2_SECRM_FL, 's' },
112 { EXT2_UNRM_FL, 'u' },
113 { EXT2_NOTAIL_FL, 't' },
114 { EXT2_TOPDIR_FL, 'T' },
115 { FS_NOCOW_FL, 'C' },
116 { FS_DAX_FL, 'x' },
117 { EXT4_CASEFOLD_FL, 'F' },
118 { 0, 0 }
119 };
120
get_flag(char c)121 static unsigned long get_flag(char c)
122 {
123 const struct flags_char *fp;
124
125 for (fp = flags_array; fp->flag != 0; fp++) {
126 if (fp->optchar == c)
127 return fp->flag;
128 }
129 return 0;
130 }
131
132
decode_arg(int * i,int argc,char ** argv)133 static int decode_arg (int * i, int argc, char ** argv)
134 {
135 char * p;
136 char * tmp;
137 unsigned long fl;
138
139 switch (argv[*i][0])
140 {
141 case '-':
142 for (p = &argv[*i][1]; *p; p++) {
143 if (*p == 'R') {
144 recursive = 1;
145 continue;
146 }
147 if (*p == 'V') {
148 verbose = 1;
149 continue;
150 }
151 if (*p == 'f') {
152 silent = 1;
153 continue;
154 }
155 if (*p == 'p') {
156 (*i)++;
157 if (*i >= argc)
158 usage ();
159 project = strtol (argv[*i], &tmp, 0);
160 if (*tmp) {
161 com_err (program_name, 0,
162 _("bad project - %s\n"),
163 argv[*i]);
164 usage ();
165 }
166 set_project = 1;
167 continue;
168 }
169 if (*p == 'v') {
170 (*i)++;
171 if (*i >= argc)
172 usage ();
173 version = strtol (argv[*i], &tmp, 0);
174 if (*tmp) {
175 com_err (program_name, 0,
176 _("bad version - %s\n"),
177 argv[*i]);
178 usage ();
179 }
180 set_version = 1;
181 continue;
182 }
183 if ((fl = get_flag(*p)) == 0)
184 usage();
185 rf |= fl;
186 rem = 1;
187 }
188 break;
189 case '+':
190 add = 1;
191 for (p = &argv[*i][1]; *p; p++) {
192 if ((fl = get_flag(*p)) == 0)
193 usage();
194 af |= fl;
195 }
196 break;
197 case '=':
198 set = 1;
199 for (p = &argv[*i][1]; *p; p++) {
200 if ((fl = get_flag(*p)) == 0)
201 usage();
202 sf |= fl;
203 }
204 break;
205 default:
206 return EOF;
207 }
208 return 1;
209 }
210
211 static int chattr_dir_proc(const char *, struct dirent *, void *);
212
change_attributes(const char * name)213 static int change_attributes(const char * name)
214 {
215 unsigned long flags;
216 STRUCT_STAT st;
217
218 if (LSTAT (name, &st) == -1) {
219 if (!silent)
220 com_err (program_name, errno,
221 _("while trying to stat %s"), name);
222 return -1;
223 }
224
225 if (fgetflags(name, &flags) == -1) {
226 if (!silent)
227 com_err(program_name, errno,
228 _("while reading flags on %s"), name);
229 return -1;
230 }
231 if (set) {
232 if (verbose) {
233 printf (_("Flags of %s set as "), name);
234 print_flags (stdout, sf, 0);
235 printf ("\n");
236 }
237 if (fsetflags (name, sf) == -1)
238 perror (name);
239 } else {
240 if (rem)
241 flags &= ~rf;
242 if (add)
243 flags |= af;
244 if (verbose) {
245 printf(_("Flags of %s set as "), name);
246 print_flags(stdout, flags, 0);
247 printf("\n");
248 }
249 if (!S_ISDIR(st.st_mode))
250 flags &= ~EXT2_DIRSYNC_FL;
251 if (fsetflags(name, flags) == -1) {
252 if (!silent) {
253 com_err(program_name, errno,
254 _("while setting flags on %s"),
255 name);
256 }
257 return -1;
258 }
259 }
260 if (set_version) {
261 if (verbose)
262 printf (_("Version of %s set as %lu\n"), name, version);
263 if (fsetversion (name, version) == -1) {
264 if (!silent)
265 com_err (program_name, errno,
266 _("while setting version on %s"),
267 name);
268 return -1;
269 }
270 }
271 if (set_project) {
272 if (verbose)
273 printf (_("Project of %s set as %lu\n"), name, project);
274 if (fsetproject (name, project) == -1) {
275 if (!silent)
276 com_err (program_name, errno,
277 _("while setting project on %s"),
278 name);
279 return -1;
280 }
281
282 }
283 if (S_ISDIR(st.st_mode) && recursive)
284 return iterate_on_dir (name, chattr_dir_proc, NULL);
285 return 0;
286 }
287
chattr_dir_proc(const char * dir_name,struct dirent * de,void * private EXT2FS_ATTR ((unused)))288 static int chattr_dir_proc (const char * dir_name, struct dirent * de,
289 void * private EXT2FS_ATTR((unused)))
290 {
291 int ret = 0;
292
293 if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
294 char *path;
295
296 path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
297 if (!path) {
298 fprintf(stderr, "%s",
299 _("Couldn't allocate path variable "
300 "in chattr_dir_proc"));
301 return -1;
302 }
303 sprintf(path, "%s/%s", dir_name, de->d_name);
304 ret = change_attributes(path);
305 free(path);
306 }
307 return ret;
308 }
309
main(int argc,char ** argv)310 int main (int argc, char ** argv)
311 {
312 int i, j;
313 int end_arg = 0;
314 int err, retval = 0;
315
316 #ifdef ENABLE_NLS
317 setlocale(LC_MESSAGES, "");
318 setlocale(LC_CTYPE, "");
319 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
320 textdomain(NLS_CAT_NAME);
321 set_com_err_gettext(gettext);
322 #endif
323 if (argc && *argv)
324 program_name = *argv;
325 i = 1;
326 while (i < argc && !end_arg) {
327 /* '--' arg should end option processing */
328 if (strcmp(argv[i], "--") == 0) {
329 i++;
330 end_arg = 1;
331 } else if (decode_arg (&i, argc, argv) == EOF)
332 end_arg = 1;
333 else
334 i++;
335 }
336 if (i >= argc)
337 usage ();
338 if (set && (add || rem)) {
339 fputs(_("= is incompatible with - and +\n"), stderr);
340 exit (1);
341 }
342 if ((rf & af) != 0) {
343 fputs("Can't both set and unset same flag.\n", stderr);
344 exit (1);
345 }
346 if (!(add || rem || set || set_version || set_project )) {
347 fputs(_("Must use '-v', =, - or +\n"), stderr);
348 exit (1);
349 }
350 if (verbose)
351 fprintf (stderr, "chattr %s (%s)\n",
352 E2FSPROGS_VERSION, E2FSPROGS_DATE);
353 for (j = i; j < argc; j++) {
354 err = change_attributes (argv[j]);
355 if (err)
356 retval = 1;
357 }
358 exit(retval);
359 }
360