misc/chattr.c

   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
  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
 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
 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
 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
 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
 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 }