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