source: branches/stable/mindi-busybox/archival/libunarchive/data_extract_all.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 4.2 KB
Line 
1/*
2 *  This program is free software; you can redistribute it and/or modify
3 *  it under the terms of the GNU General Public License as published by
4 *  the Free Software Foundation; either version 2 of the License, or
5 *  (at your option) any later version.
6 *
7 *  This program is distributed in the hope that it will be useful,
8 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
9 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 *  GNU General Public License for more details.
11 *
12 *  You should have received a copy of the GNU General Public License
13 *  along with this program; if not, write to the Free Software
14 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
15 */
16
17#include <sys/types.h>
18
19#include <errno.h>
20#include <fcntl.h>
21#include <stdlib.h>
22#include <string.h>
23#include <utime.h>
24#include <unistd.h>
25#include <stdlib.h>
26
27#include "libbb.h"
28#include "unarchive.h"
29
30void data_extract_all(archive_handle_t *archive_handle)
31{
32    file_header_t *file_header = archive_handle->file_header;
33    int dst_fd;
34    int res;
35
36    if (archive_handle->flags & ARCHIVE_CREATE_LEADING_DIRS) {
37        char *name = bb_xstrdup(file_header->name);
38        bb_make_directory (dirname(name), -1, FILEUTILS_RECUR);
39        free(name);
40    }
41
42    /* Check if the file already exists */
43    if (archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) {
44        /* Remove the existing entry if it exists */
45        if (((file_header->mode & S_IFMT) != S_IFDIR) && (unlink(file_header->name) == -1) && (errno != ENOENT)) {
46            bb_perror_msg_and_die("Couldnt remove old file");
47        }
48    }
49    else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
50        /* Remove the existing entry if its older than the extracted entry */
51        struct stat statbuf;
52        if (lstat(file_header->name, &statbuf) == -1) {
53            if (errno != ENOENT) {
54                bb_perror_msg_and_die("Couldnt stat old file");
55            }
56        }
57        else if (statbuf.st_mtime <= file_header->mtime) {
58            if (!(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
59                bb_error_msg("%s not created: newer or same age file exists", file_header->name);
60            }
61            data_skip(archive_handle);
62            return;
63        }
64        else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) {
65            bb_perror_msg_and_die("Couldnt remove old file %s", file_header->name);
66        }
67    }
68
69    /* Handle hard links separately
70     * We identified hard links as regular files of size 0 with a symlink */
71    if (S_ISREG(file_header->mode) && (file_header->link_name) && (file_header->size == 0)) {
72        /* hard link */
73        res = link(file_header->link_name, file_header->name);
74        if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
75            bb_perror_msg("Couldnt create hard link");
76        }
77    } else {
78        /* Create the filesystem entry */
79        switch(file_header->mode & S_IFMT) {
80            case S_IFREG: {
81                /* Regular file */
82                dst_fd = bb_xopen(file_header->name, O_WRONLY | O_CREAT | O_EXCL);
83                bb_copyfd_size(archive_handle->src_fd, dst_fd, file_header->size);
84                close(dst_fd);
85                break;
86                }
87            case S_IFDIR:
88                res = mkdir(file_header->name, file_header->mode);
89                if ((errno != EISDIR) && (res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
90                    bb_perror_msg("extract_archive: %s", file_header->name);
91                }
92                break;
93            case S_IFLNK:
94                /* Symlink */
95                res = symlink(file_header->link_name, file_header->name);
96                if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
97                    bb_perror_msg("Cannot create symlink from %s to '%s'", file_header->name, file_header->link_name);
98                }
99                break;
100            case S_IFSOCK:
101            case S_IFBLK:
102            case S_IFCHR:
103            case S_IFIFO:
104                res = mknod(file_header->name, file_header->mode, file_header->device);
105                if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
106                    bb_perror_msg("Cannot create node %s", file_header->name);
107                }
108                break;
109            default:
110                bb_error_msg_and_die("Unrecognised file type");
111        }
112    }
113
114    if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
115        lchown(file_header->name, file_header->uid, file_header->gid);
116    }
117    if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM) &&
118         (file_header->mode & S_IFMT) != S_IFLNK)
119    {
120        chmod(file_header->name, file_header->mode);
121    }
122
123    if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
124        struct utimbuf t;
125        t.actime = t.modtime = file_header->mtime;
126        utime(file_header->name, &t);
127    }
128}
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