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] [-+=aAcCdDeijPsStTuF] [-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_NODUMP_FL, 'd' },
106 { EXT4_EXTENTS_FL, 'e'},
107 { EXT2_IMMUTABLE_FL, 'i' },
108 { EXT3_JOURNAL_DATA_FL, 'j' },
109 { EXT4_PROJINHERIT_FL, 'P' },
110 { EXT2_SECRM_FL, 's' },
111 { EXT2_UNRM_FL, 'u' },
112 { EXT2_NOTAIL_FL, 't' },
113 { EXT2_TOPDIR_FL, 'T' },
114 { FS_NOCOW_FL, 'C' },
115 { EXT4_CASEFOLD_FL, 'F' },
116 { 0, 0 }
117 };
118
get_flag(char c)119 static unsigned long get_flag(char c)
120 {
121 const struct flags_char *fp;
122
123 for (fp = flags_array; fp->flag != 0; fp++) {
124 if (fp->optchar == c)
125 return fp->flag;
126 }
127 return 0;
128 }
129
130
decode_arg(int * i,int argc,char ** argv)131 static int decode_arg (int * i, int argc, char ** argv)
132 {
133 char * p;
134 char * tmp;
135 unsigned long fl;
136
137 switch (argv[*i][0])
138 {
139 case '-':
140 for (p = &argv[*i][1]; *p; p++) {
141 if (*p == 'R') {
142 recursive = 1;
143 continue;
144 }
145 if (*p == 'V') {
146 verbose = 1;
147 continue;
148 }
149 if (*p == 'f') {
150 silent = 1;
151 continue;
152 }
153 if (*p == 'p') {
154 (*i)++;
155 if (*i >= argc)
156 usage ();
157 project = strtol (argv[*i], &tmp, 0);
158 if (*tmp) {
159 com_err (program_name, 0,
160 _("bad project - %s\n"),
161 argv[*i]);
162 usage ();
163 }
164 set_project = 1;
165 continue;
166 }
167 if (*p == 'v') {
168 (*i)++;
169 if (*i >= argc)
170 usage ();
171 version = strtol (argv[*i], &tmp, 0);
172 if (*tmp) {
173 com_err (program_name, 0,
174 _("bad version - %s\n"),
175 argv[*i]);
176 usage ();
177 }
178 set_version = 1;
179 continue;
180 }
181 if ((fl = get_flag(*p)) == 0)
182 usage();
183 rf |= fl;
184 rem = 1;
185 }
186 break;
187 case '+':
188 add = 1;
189 for (p = &argv[*i][1]; *p; p++) {
190 if ((fl = get_flag(*p)) == 0)
191 usage();
192 af |= fl;
193 }
194 break;
195 case '=':
196 set = 1;
197 for (p = &argv[*i][1]; *p; p++) {
198 if ((fl = get_flag(*p)) == 0)
199 usage();
200 sf |= fl;
201 }
202 break;
203 default:
204 return EOF;
205 break;
206 }
207 return 1;
208 }
209
210 static int chattr_dir_proc(const char *, struct dirent *, void *);
211
change_attributes(const char * name)212 static int change_attributes(const char * name)
213 {
214 unsigned long flags;
215 STRUCT_STAT st;
216
217 if (LSTAT (name, &st) == -1) {
218 if (!silent)
219 com_err (program_name, errno,
220 _("while trying to stat %s"), name);
221 return -1;
222 }
223
224 if (fgetflags(name, &flags) == -1) {
225 if (!silent)
226 com_err(program_name, errno,
227 _("while reading flags on %s"), name);
228 return -1;
229 }
230 if (set) {
231 if (verbose) {
232 printf (_("Flags of %s set as "), name);
233 print_flags (stdout, sf, 0);
234 printf ("\n");
235 }
236 if (fsetflags (name, sf) == -1)
237 perror (name);
238 } else {
239 if (rem)
240 flags &= ~rf;
241 if (add)
242 flags |= af;
243 if (verbose) {
244 printf(_("Flags of %s set as "), name);
245 print_flags(stdout, flags, 0);
246 printf("\n");
247 }
248 if (!S_ISDIR(st.st_mode))
249 flags &= ~EXT2_DIRSYNC_FL;
250 if (fsetflags(name, flags) == -1) {
251 if (!silent) {
252 com_err(program_name, errno,
253 _("while setting flags on %s"),
254 name);
255 }
256 return -1;
257 }
258 }
259 if (set_version) {
260 if (verbose)
261 printf (_("Version of %s set as %lu\n"), name, version);
262 if (fsetversion (name, version) == -1) {
263 if (!silent)
264 com_err (program_name, errno,
265 _("while setting version on %s"),
266 name);
267 return -1;
268 }
269 }
270 if (set_project) {
271 if (verbose)
272 printf (_("Project of %s set as %lu\n"), name, project);
273 if (fsetproject (name, project) == -1) {
274 if (!silent)
275 com_err (program_name, errno,
276 _("while setting project on %s"),
277 name);
278 return -1;
279 }
280
281 }
282 if (S_ISDIR(st.st_mode) && recursive)
283 return iterate_on_dir (name, chattr_dir_proc, NULL);
284 return 0;
285 }
286
chattr_dir_proc(const char * dir_name,struct dirent * de,void * private EXT2FS_ATTR ((unused)))287 static int chattr_dir_proc (const char * dir_name, struct dirent * de,
288 void * private EXT2FS_ATTR((unused)))
289 {
290 int ret = 0;
291
292 if (strcmp (de->d_name, ".") && strcmp (de->d_name, "..")) {
293 char *path;
294
295 path = malloc(strlen (dir_name) + 1 + strlen (de->d_name) + 1);
296 if (!path) {
297 fprintf(stderr, "%s",
298 _("Couldn't allocate path variable "
299 "in chattr_dir_proc"));
300 return -1;
301 }
302 sprintf(path, "%s/%s", dir_name, de->d_name);
303 ret = change_attributes(path);
304 free(path);
305 }
306 return ret;
307 }
308
main(int argc,char ** argv)309 int main (int argc, char ** argv)
310 {
311 int i, j;
312 int end_arg = 0;
313 int err, retval = 0;
314
315 #ifdef ENABLE_NLS
316 setlocale(LC_MESSAGES, "");
317 setlocale(LC_CTYPE, "");
318 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
319 textdomain(NLS_CAT_NAME);
320 set_com_err_gettext(gettext);
321 #endif
322 if (argc && *argv)
323 program_name = *argv;
324 i = 1;
325 while (i < argc && !end_arg) {
326 /* '--' arg should end option processing */
327 if (strcmp(argv[i], "--") == 0) {
328 i++;
329 end_arg = 1;
330 } else if (decode_arg (&i, argc, argv) == EOF)
331 end_arg = 1;
332 else
333 i++;
334 }
335 if (i >= argc)
336 usage ();
337 if (set && (add || rem)) {
338 fputs(_("= is incompatible with - and +\n"), stderr);
339 exit (1);
340 }
341 if ((rf & af) != 0) {
342 fputs("Can't both set and unset same flag.\n", stderr);
343 exit (1);
344 }
345 if (!(add || rem || set || set_version || set_project )) {
346 fputs(_("Must use '-v', =, - or +\n"), stderr);
347 exit (1);
348 }
349 if (verbose)
350 fprintf (stderr, "chattr %s (%s)\n",
351 E2FSPROGS_VERSION, E2FSPROGS_DATE);
352 for (j = i; j < argc; j++) {
353 err = change_attributes (argv[j]);
354 if (err)
355 retval = 1;
356 }
357 exit(retval);
358 }
359