Annotation of /trunk/mkinitrd-magellan/busybox/archival/libunarchive/data_extract_all.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years ago) by niro
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File size: 4364 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years ago) by niro
File MIME type: text/plain
File size: 4364 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
4 | */ | ||
5 | |||
6 | #include "libbb.h" | ||
7 | #include "unarchive.h" | ||
8 | |||
9 | niro | 816 | void FAST_FUNC data_extract_all(archive_handle_t *archive_handle) |
10 | niro | 532 | { |
11 | file_header_t *file_header = archive_handle->file_header; | ||
12 | int dst_fd; | ||
13 | int res; | ||
14 | |||
15 | niro | 816 | if (archive_handle->ah_flags & ARCHIVE_CREATE_LEADING_DIRS) { |
16 | niro | 532 | char *name = xstrdup(file_header->name); |
17 | bb_make_directory(dirname(name), -1, FILEUTILS_RECUR); | ||
18 | free(name); | ||
19 | } | ||
20 | |||
21 | /* Check if the file already exists */ | ||
22 | niro | 816 | if (archive_handle->ah_flags & ARCHIVE_EXTRACT_UNCONDITIONAL) { |
23 | /* Remove the entry if it exists */ | ||
24 | niro | 532 | if (((file_header->mode & S_IFMT) != S_IFDIR) |
25 | && (unlink(file_header->name) == -1) | ||
26 | && (errno != ENOENT) | ||
27 | ) { | ||
28 | niro | 816 | bb_perror_msg_and_die("cannot remove old file %s", |
29 | file_header->name); | ||
30 | niro | 532 | } |
31 | } | ||
32 | niro | 816 | else if (archive_handle->ah_flags & ARCHIVE_EXTRACT_NEWER) { |
33 | niro | 532 | /* Remove the existing entry if its older than the extracted entry */ |
34 | struct stat statbuf; | ||
35 | if (lstat(file_header->name, &statbuf) == -1) { | ||
36 | if (errno != ENOENT) { | ||
37 | bb_perror_msg_and_die("cannot stat old file"); | ||
38 | } | ||
39 | } | ||
40 | else if (statbuf.st_mtime <= file_header->mtime) { | ||
41 | niro | 816 | if (!(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) { |
42 | niro | 532 | bb_error_msg("%s not created: newer or " |
43 | "same age file exists", file_header->name); | ||
44 | } | ||
45 | data_skip(archive_handle); | ||
46 | return; | ||
47 | } | ||
48 | else if ((unlink(file_header->name) == -1) && (errno != EISDIR)) { | ||
49 | bb_perror_msg_and_die("cannot remove old file %s", | ||
50 | file_header->name); | ||
51 | } | ||
52 | } | ||
53 | |||
54 | /* Handle hard links separately | ||
55 | * We identified hard links as regular files of size 0 with a symlink */ | ||
56 | niro | 816 | if (S_ISREG(file_header->mode) && (file_header->link_target) |
57 | niro | 532 | && (file_header->size == 0) |
58 | ) { | ||
59 | /* hard link */ | ||
60 | niro | 816 | res = link(file_header->link_target, file_header->name); |
61 | if ((res == -1) && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET)) { | ||
62 | bb_perror_msg("cannot create %slink " | ||
63 | "from %s to %s", "hard", | ||
64 | file_header->name, | ||
65 | file_header->link_target); | ||
66 | niro | 532 | } |
67 | } else { | ||
68 | /* Create the filesystem entry */ | ||
69 | switch (file_header->mode & S_IFMT) { | ||
70 | case S_IFREG: { | ||
71 | /* Regular file */ | ||
72 | dst_fd = xopen3(file_header->name, O_WRONLY | O_CREAT | O_EXCL, | ||
73 | file_header->mode); | ||
74 | bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size); | ||
75 | close(dst_fd); | ||
76 | break; | ||
77 | } | ||
78 | case S_IFDIR: | ||
79 | res = mkdir(file_header->name, file_header->mode); | ||
80 | niro | 816 | if ((res == -1) |
81 | && (errno != EISDIR) /* btw, Linux doesn't return this */ | ||
82 | && (errno != EEXIST) | ||
83 | && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) | ||
84 | niro | 532 | ) { |
85 | niro | 816 | bb_perror_msg("cannot make dir %s", file_header->name); |
86 | niro | 532 | } |
87 | break; | ||
88 | case S_IFLNK: | ||
89 | /* Symlink */ | ||
90 | niro | 816 | res = symlink(file_header->link_target, file_header->name); |
91 | niro | 532 | if ((res == -1) |
92 | niro | 816 | && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) |
93 | niro | 532 | ) { |
94 | niro | 816 | bb_perror_msg("cannot create %slink " |
95 | "from %s to %s", "sym", | ||
96 | niro | 532 | file_header->name, |
97 | niro | 816 | file_header->link_target); |
98 | niro | 532 | } |
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) | ||
106 | niro | 816 | && !(archive_handle->ah_flags & ARCHIVE_EXTRACT_QUIET) |
107 | niro | 532 | ) { |
108 | bb_perror_msg("cannot create node %s", file_header->name); | ||
109 | } | ||
110 | break; | ||
111 | default: | ||
112 | bb_error_msg_and_die("unrecognized file type"); | ||
113 | } | ||
114 | } | ||
115 | |||
116 | niro | 816 | if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_OWN)) { |
117 | #if ENABLE_FEATURE_TAR_UNAME_GNAME | ||
118 | uid_t uid = file_header->uid; | ||
119 | gid_t gid = file_header->gid; | ||
120 | |||
121 | if (file_header->uname) { | ||
122 | struct passwd *pwd = getpwnam(file_header->uname); | ||
123 | if (pwd) uid = pwd->pw_uid; | ||
124 | } | ||
125 | if (file_header->gname) { | ||
126 | struct group *grp = getgrnam(file_header->gname); | ||
127 | if (grp) gid = grp->gr_gid; | ||
128 | } | ||
129 | lchown(file_header->name, uid, gid); | ||
130 | #else | ||
131 | niro | 532 | lchown(file_header->name, file_header->uid, file_header->gid); |
132 | niro | 816 | #endif |
133 | niro | 532 | } |
134 | niro | 816 | if ((file_header->mode & S_IFMT) != S_IFLNK) { |
135 | /* uclibc has no lchmod, glibc is even stranger - | ||
136 | * it has lchmod which seems to do nothing! | ||
137 | * so we use chmod... */ | ||
138 | if (!(archive_handle->ah_flags & ARCHIVE_NOPRESERVE_PERM)) { | ||
139 | chmod(file_header->name, file_header->mode); | ||
140 | } | ||
141 | /* same for utime */ | ||
142 | if (archive_handle->ah_flags & ARCHIVE_PRESERVE_DATE) { | ||
143 | struct utimbuf t; | ||
144 | t.actime = t.modtime = file_header->mtime; | ||
145 | utime(file_header->name, &t); | ||
146 | } | ||
147 | niro | 532 | } |
148 | } |