1 /* 2 * chattr.c - Change file attributes on an ext2 file system 3 * 4 * Copyright (C) 1993, 1994 Remy Card <card (at) 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 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 }; 111 112 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 } 122 123 124 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 *); 190 191 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 } 270 271 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 } 291 292 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
