[821] | 1 | /*
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| 2 | * This program is free software; you can redistribute it and/or modify
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| 3 | * it under the terms of the GNU General Public License as published by
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| 4 | * the Free Software Foundation; either version 2 of the License, or
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| 5 | * (at your option) any later version.
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| 6 | *
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| 7 | * This program is distributed in the hope that it will be useful,
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| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 10 | * GNU General Public License for more details.
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| 11 | *
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| 12 | * You should have received a copy of the GNU General Public License
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| 13 | * along with this program; if not, write to the Free Software
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| 14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 15 | */
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| 16 |
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| 17 | #include <sys/types.h>
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| 18 |
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| 19 | #include <errno.h>
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| 20 | #include <fcntl.h>
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| 21 | #include <stdlib.h>
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| 22 | #include <string.h>
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| 23 | #include <utime.h>
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| 24 | #include <unistd.h>
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| 25 | #include <stdlib.h>
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| 26 |
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| 27 | #include "libbb.h"
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| 28 | #include "unarchive.h"
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| 29 |
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| 30 | void data_extract_all(archive_handle_t *archive_handle)
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| 31 | {
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| 32 | file_header_t *file_header = archive_handle->file_header;
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| 33 | int dst_fd;
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| 34 | int res;
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| 35 |
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| 36 | if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) {
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| 37 | char *name = bb_xstrdup(file_header->name);
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| 38 | bb_make_directory (dirname(name), -1, FILEUTILS_RECUR);
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| 39 | free(name);
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| 40 | }
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| 41 |
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| 42 | /* Check if the file already exists */
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| 43 | if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
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| 44 | /* Remove the existing entry if it exists */
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| 45 | if (((file_header->mode & S_IFMT) != S_IFDIR) && (unlink(file_header->name) == -1) && (errno != ENOENT)) {
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| 46 | bb_perror_msg_and_die("Couldnt remove old file");
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| 47 | }
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| 48 | }
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| 49 | else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
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| 50 | /* Remove the existing entry if its older than the extracted entry */
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| 51 | struct stat statbuf;
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| 52 | if (lstat(file_header->name, &statbuf) == -1) {
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| 53 | if (errno != ENOENT) {
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| 54 | bb_perror_msg_and_die("Couldnt stat old file");
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| 55 | }
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| 56 | }
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| 57 | else if (statbuf.st_mtime <= file_header->mtime) {
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| 58 | if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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| 59 | bb_error_msg("%s not created: newer or same age file exists", file_header->name);
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| 60 | }
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| 61 | data_skip(archive_handle);
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| 62 | return;
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| 63 | }
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| 64 | else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
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| 65 | bb_perror_msg_and_die("Couldnt remove old file %s", file_header->name);
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | /* Handle hard links separately
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| 70 | * We identified hard links as regular files of size 0 with a symlink */
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| 71 | if (S_ISREG(file_header->mode) && (file_header->link_name) && (file_header->size == 0)) {
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| 72 | /* hard link */
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| 73 | res = link(file_header->link_name, file_header->name);
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| 74 | if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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| 75 | bb_perror_msg("Couldnt create hard link");
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| 76 | }
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| 77 | } else {
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| 78 | /* Create the filesystem entry */
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| 79 | switch(file_header->mode & S_IFMT) {
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| 80 | case S_IFREG: {
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| 81 | /* Regular file */
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| 82 | dst_fd = bb_xopen(file_header->name, O_WRONLY | O_CREAT | O_EXCL);
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| 83 | bb_copyfd_size(archive_handle->src_fd, dst_fd, file_header->size);
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| 84 | close(dst_fd);
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| 85 | break;
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| 86 | }
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| 87 | case S_IFDIR:
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| 88 | res = mkdir(file_header->name, file_header->mode);
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| 89 | if ((errno != EISDIR) && (res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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| 90 | bb_perror_msg("extract_archive: %s", file_header->name);
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| 91 | }
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| 92 | break;
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| 93 | case S_IFLNK:
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| 94 | /* Symlink */
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| 95 | res = symlink(file_header->link_name, file_header->name);
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| 96 | if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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| 97 | bb_perror_msg("Cannot create symlink from %s to '%s'", file_header->name, file_header->link_name);
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| 98 | }
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| 99 | break;
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| 100 | case S_IFSOCK:
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| 101 | case S_IFBLK:
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| 102 | case S_IFCHR:
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| 103 | case S_IFIFO:
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| 104 | res = mknod(file_header->name, file_header->mode, file_header->device);
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| 105 | if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
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| 106 | bb_perror_msg("Cannot create node %s", file_header->name);
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| 107 | }
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| 108 | break;
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| 109 | default:
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| 110 | bb_error_msg_and_die("Unrecognised file type");
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
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| 115 | lchown(file_header->name, file_header->uid, file_header->gid);
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| 116 | }
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| 117 | if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM) &&
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| 118 | (file_header->mode & S_IFMT) != S_IFLNK)
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| 119 | {
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| 120 | chmod(file_header->name, file_header->mode);
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| 121 | }
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| 122 |
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| 123 | if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
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| 124 | struct utimbuf t;
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| 125 | t.actime = t.modtime = file_header->mtime;
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| 126 | utime(file_header->name, &t);
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| 127 | }
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| 128 | }
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