X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=src%2Fextract.c;h=f348b822ed6620c2dcdd3854cdd460e9dc1166eb;hb=75bf036edc1425eb66dcc9623846c7204f943ce6;hp=ec483050aae2cc495b6a10b615c33bcb091fa3d7;hpb=29584d69fdcc22eb7e1a2235d2a1df67f7c71090;p=chaz%2Ftar diff --git a/src/extract.c b/src/extract.c index ec48305..f348b82 100644 --- a/src/extract.c +++ b/src/extract.c @@ -1,7 +1,7 @@ /* Extract files from a tar archive. Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, - 2001, 2003 Free Software Foundation, Inc. + 2001, 2003, 2004 Free Software Foundation, Inc. Written by John Gilmore, on 1985-11-19. @@ -19,9 +19,10 @@ with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include "system.h" +#include #include #include +#include #if HAVE_UTIME_H # include @@ -113,8 +114,20 @@ extr_init (void) we_are_root = geteuid () == 0; same_permissions_option += we_are_root; same_owner_option += we_are_root; - xalloc_fail_func = extract_finish; + /* Save 'root device' to avoid purging mount points. + FIXME: Should the same be done after handling -C option ? */ + if (one_file_system_option) + { + struct stat st; + char *dir = xgetcwd (); + + if (deref_stat (true, dir, &st)) + stat_diag (dir); + else + root_device = st.st_dev; + } + /* Option -p clears the kernel umask, so it does not affect proper restoration of file permissions. New intermediate directories will comply with umask at start of program. */ @@ -315,11 +328,11 @@ delay_set_stat (char const *file_name, struct stat const *stat_info, } /* Update the delayed_set_stat info for an intermediate directory - created on the path to DIR_NAME. The intermediate directory turned + created within the file name of DIR. The intermediate directory turned out to be the same as this directory, e.g. due to ".." or symbolic links. *DIR_STAT_INFO is the status of the directory. */ static void -repair_delayed_set_stat (char const *dir_name, +repair_delayed_set_stat (char const *dir, struct stat const *dir_stat_info) { struct delayed_set_stat *data; @@ -344,7 +357,7 @@ repair_delayed_set_stat (char const *dir_name, } ERROR ((0, 0, _("%s: Unexpected inconsistency when making directory"), - quotearg_colon (dir_name))); + quotearg_colon (dir))); } /* After a file/link/symlink/directory creation has failed, see if @@ -354,14 +367,14 @@ repair_delayed_set_stat (char const *dir_name, static int make_directories (char *file_name) { - char *cursor0 = file_name + FILESYSTEM_PREFIX_LEN (file_name); - char *cursor; /* points into path */ + char *cursor0 = file_name + FILE_SYSTEM_PREFIX_LEN (file_name); + char *cursor; /* points into the file name */ int did_something = 0; /* did we do anything yet? */ int mode; int invert_permissions; int status; - + for (cursor = cursor0; *cursor; cursor++) { if (! ISSLASH (*cursor)) @@ -372,7 +385,7 @@ make_directories (char *file_name) if (cursor == cursor0 || ISSLASH (cursor[-1])) continue; - /* Avoid mkdir where last part of path is "." or "..". */ + /* Avoid mkdir where last part of file name is "." or "..". */ if (cursor[-1] == '.' && (cursor == cursor0 + 1 || ISSLASH (cursor[-2]) @@ -380,7 +393,7 @@ make_directories (char *file_name) && (cursor == cursor0 + 2 || ISSLASH (cursor[-3]))))) continue; - *cursor = '\0'; /* truncate the path there */ + *cursor = '\0'; /* truncate the name there */ mode = MODE_RWX & ~ newdir_umask; invert_permissions = we_are_root ? 0 : MODE_WXUSR & ~ mode; status = mkdir (file_name, mode ^ invert_permissions); @@ -423,25 +436,25 @@ static bool file_newer_p (const char *file_name, struct tar_stat_info *tar_stat) { struct stat st; - + if (stat (file_name, &st)) { stat_warn (file_name); return true; /* Be on the safe side */ } if (!S_ISDIR (st.st_mode) - && st.st_mtime >= current_stat_info.stat.st_mtime) + && st.st_mtime >= tar_stat->stat.st_mtime) { return true; } return false; -} +} /* Prepare to extract a file. Return zero if extraction should not proceed. */ static int -prepare_to_extract (char const *file_name, bool directory) +prepare_to_extract (char const *file_name) { if (to_stdout_option) return 0; @@ -449,7 +462,9 @@ prepare_to_extract (char const *file_name, bool directory) switch (old_files_option) { case UNLINK_FIRST_OLD_FILES: - if (!remove_any_file (file_name, recursive_unlink_option) + if (!remove_any_file (file_name, + recursive_unlink_option ? RECURSIVE_REMOVE_OPTION + : ORDINARY_REMOVE_OPTION) && errno && errno != ENOENT) { unlink_error (file_name); @@ -460,7 +475,7 @@ prepare_to_extract (char const *file_name, bool directory) case KEEP_NEWER_FILES: if (file_newer_p (file_name, ¤t_stat_info)) { - WARN ((0, 0, _("Current `%s' is newer"), file_name)); + WARN ((0, 0, _("Current `%s' is newer"), file_name)); return 0; } break; @@ -480,7 +495,7 @@ static int maybe_recoverable (char *file_name, int *interdir_made) { int e = errno; - + if (*interdir_made) return 0; @@ -501,15 +516,18 @@ maybe_recoverable (char *file_name, int *interdir_made) return 0; } /* FALL THROUGH */ - + case DEFAULT_OLD_FILES: case NO_OVERWRITE_DIR_OLD_FILES: case OVERWRITE_OLD_FILES: { - int r = remove_any_file (file_name, 0); + int r = remove_any_file (file_name, ORDINARY_REMOVE_OPTION); errno = EEXIST; return r; } + + case UNLINK_FIRST_OLD_FILES: + break; } case ENOENT: @@ -596,7 +614,6 @@ extract_archive (void) int openflag; mode_t mode; off_t size; - off_t file_size; int interdir_made = 0; char typeflag; char *file_name; @@ -616,9 +633,9 @@ extract_archive (void) print_header (¤t_stat_info, -1); file_name = safer_name_suffix (current_stat_info.file_name, false); - if (strip_path_elements) + if (strip_name_components) { - size_t prefix_len = stripped_prefix_len (file_name, strip_path_elements); + size_t prefix_len = stripped_prefix_len (file_name, strip_name_components); if (prefix_len == (size_t) -1) { skip_member (); @@ -626,7 +643,7 @@ extract_archive (void) } file_name += prefix_len; } - + apply_nonancestor_delayed_set_stat (file_name, 0); /* Take a safety backup of a previously existing file. */ @@ -643,12 +660,10 @@ extract_archive (void) /* Extract the archive entry according to its type. */ - typeflag = current_header->header.typeflag; - /*KLUDGE */ - if (current_format == POSIX_FORMAT - && current_stat_info.archive_file_size != current_stat_info.stat.st_size) - typeflag = GNUTYPE_SPARSE; - + /* KLUDGE */ + typeflag = sparse_member_p (¤t_stat_info) ? + GNUTYPE_SPARSE : current_header->header.typeflag; + switch (typeflag) { case GNUTYPE_SPARSE: @@ -679,7 +694,7 @@ extract_archive (void) goto extract_file; } - if (! prepare_to_extract (file_name, 0)) + if (! prepare_to_extract (file_name)) { skip_member (); if (backup_option) @@ -724,7 +739,7 @@ extract_archive (void) } extract_file: - if (typeflag == GNUTYPE_SPARSE) + if (current_stat_info.is_sparse) { sparse_extract_file (fd, ¤t_stat_info, &size); } @@ -794,12 +809,11 @@ extract_archive (void) case SYMTYPE: #ifdef HAVE_SYMLINK - if (! prepare_to_extract (file_name, 0)) + if (! prepare_to_extract (file_name)) break; if (absolute_names_option - || ! (ISSLASH (current_stat_info.link_name - [FILESYSTEM_PREFIX_LEN (current_stat_info.link_name)]) + || ! (IS_ABSOLUTE_FILE_NAME (current_stat_info.link_name) || contains_dot_dot (current_stat_info.link_name))) { while (status = symlink (current_stat_info.link_name, file_name), @@ -878,7 +892,7 @@ extract_archive (void) status = 0; } } - + if (status != 0 && backup_option) undo_last_backup (); break; @@ -899,7 +913,7 @@ extract_archive (void) #endif case LNKTYPE: - if (! prepare_to_extract (file_name, 0)) + if (! prepare_to_extract (file_name)) break; again_link: @@ -912,17 +926,18 @@ extract_archive (void) /* MSDOS does not implement links. However, djgpp's link() actually copies the file. */ status = link (link_name, file_name); + e = errno; if (status == 0) { struct delayed_symlink *ds = delayed_symlink_head; - if (ds && stat (link_name, &st1) == 0) + if (ds && lstat (link_name, &st1) == 0) for (; ds; ds = ds->next) if (ds->dev == st1.st_dev && ds->ino == st1.st_ino && ds->mtime == st1.st_mtime) { - struct string_list *p = + struct string_list *p = xmalloc (offsetof (struct string_list, string) + strlen (file_name) + 1); strcpy (p->string, file_name); @@ -932,17 +947,20 @@ extract_archive (void) } break; } + + if ((e == EEXIST && strcmp (link_name, file_name) == 0) + || (lstat (link_name, &st1) == 0 + && lstat (file_name, &st2) == 0 + && st1.st_dev == st2.st_dev + && st1.st_ino == st2.st_ino)) + break; + + errno = e; if (maybe_recoverable (file_name, &interdir_made)) goto again_link; if (incremental_option && errno == EEXIST) break; - e = errno; - if (stat (link_name, &st1) == 0 - && stat (file_name, &st2) == 0 - && st1.st_dev == st2.st_dev - && st1.st_ino == st2.st_ino) - break; link_error (link_name, file_name); if (backup_option) @@ -963,7 +981,7 @@ extract_archive (void) #if S_IFCHR || S_IFBLK make_node: - if (! prepare_to_extract (file_name, 0)) + if (! prepare_to_extract (file_name)) break; status = mknod (file_name, current_stat_info.stat.st_mode, @@ -984,7 +1002,7 @@ extract_archive (void) #if HAVE_MKFIFO || defined mkfifo case FIFOTYPE: - if (! prepare_to_extract (file_name, 0)) + if (! prepare_to_extract (file_name)) break; while (status = mkfifo (file_name, current_stat_info.stat.st_mode), @@ -1012,7 +1030,7 @@ extract_archive (void) /* Read the entry and delete files that aren't listed in the archive. */ - gnu_restore (file_name); + purge_directory (file_name); } else if (typeflag == GNUTYPE_DUMPDIR) skip_member (); @@ -1021,7 +1039,7 @@ extract_archive (void) | (we_are_root ? 0 : MODE_WXUSR)) & MODE_RWX); - status = prepare_to_extract (file_name, 1); + status = prepare_to_extract (file_name); if (status == 0) break; if (status < 0) @@ -1053,7 +1071,7 @@ extract_archive (void) } errno = EEXIST; } - + if (maybe_recoverable (file_name, &interdir_made)) goto again_dir; @@ -1193,3 +1211,10 @@ fatal_exit (void) error (TAREXIT_FAILURE, 0, _("Error is not recoverable: exiting now")); abort (); } + +void +xalloc_die (void) +{ + error (0, 0, "%s", _("memory exhausted")); + fatal_exit (); +}