2 * Copyright (c) 2003-2004 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_format_cpio.c,v 1.5 2004/11/05 05:26:30 kientzle Exp $");
37 #include "archive_entry.h"
38 #include "archive_private.h"
40 static int archive_write_cpio_data(struct archive
*, const void *buff
,
42 static int archive_write_cpio_finish(struct archive
*);
43 static int archive_write_cpio_finish_entry(struct archive
*);
44 static int archive_write_cpio_header(struct archive
*,
45 struct archive_entry
*);
46 static int format_octal(int64_t, void *, int);
47 static int64_t format_octal_recursive(int64_t, char *, int);
50 uint64_t entry_bytes_remaining
;
68 * Set output format to 'cpio' format.
71 archive_write_set_format_cpio(struct archive
*a
)
75 /* If someone else was already registered, unregister them. */
76 if (a
->format_finish
!= NULL
)
77 (a
->format_finish
)(a
);
79 cpio
= malloc(sizeof(*cpio
));
81 archive_set_error(a
, ENOMEM
, "Can't allocate cpio data");
82 return (ARCHIVE_FATAL
);
84 memset(cpio
, 0, sizeof(*cpio
));
85 a
->format_data
= cpio
;
87 a
->pad_uncompressed
= 1;
88 a
->format_write_header
= archive_write_cpio_header
;
89 a
->format_write_data
= archive_write_cpio_data
;
90 a
->format_finish_entry
= archive_write_cpio_finish_entry
;
91 a
->format_finish
= archive_write_cpio_finish
;
92 a
->archive_format
= ARCHIVE_FORMAT_CPIO_POSIX
;
93 a
->archive_format_name
= "POSIX cpio";
98 archive_write_cpio_header(struct archive
*a
, struct archive_entry
*entry
)
101 const char *p
, *path
;
103 const struct stat
*st
;
104 struct cpio_header h
;
106 cpio
= a
->format_data
;
109 path
= archive_entry_pathname(entry
);
110 pathlength
= strlen(path
) + 1; /* Include trailing null. */
111 st
= archive_entry_stat(entry
);
113 memset(&h
, 0, sizeof(h
));
114 format_octal(070707, &h
.c_magic
, sizeof(h
.c_magic
));
115 format_octal(st
->st_dev
, &h
.c_dev
, sizeof(h
.c_dev
));
117 * TODO: Generate artificial inode numbers rather than just
118 * re-using the ones off the disk. That way, the 18-bit c_ino
119 * field only limits the number of files in the archive.
121 if (st
->st_ino
> 0777777) {
122 archive_set_error(a
, ERANGE
, "large inode number truncated");
126 format_octal(st
->st_ino
& 0777777, &h
.c_ino
, sizeof(h
.c_ino
));
127 format_octal(st
->st_mode
, &h
.c_mode
, sizeof(h
.c_mode
));
128 format_octal(st
->st_uid
, &h
.c_uid
, sizeof(h
.c_uid
));
129 format_octal(st
->st_gid
, &h
.c_gid
, sizeof(h
.c_gid
));
130 format_octal(st
->st_nlink
, &h
.c_nlink
, sizeof(h
.c_nlink
));
131 if(S_ISBLK(st
->st_mode
) || S_ISCHR(st
->st_mode
))
132 format_octal(st
->st_rdev
, &h
.c_rdev
, sizeof(h
.c_rdev
));
134 format_octal(0, &h
.c_rdev
, sizeof(h
.c_rdev
));
135 format_octal(st
->st_mtime
, &h
.c_mtime
, sizeof(h
.c_mtime
));
136 format_octal(pathlength
, &h
.c_namesize
, sizeof(h
.c_namesize
));
138 /* Symlinks get the link written as the body of the entry. */
139 p
= archive_entry_symlink(entry
);
140 if (p
!= NULL
&& *p
!= '\0')
141 format_octal(strlen(p
), &h
.c_filesize
, sizeof(h
.c_filesize
));
143 format_octal(st
->st_size
, &h
.c_filesize
, sizeof(h
.c_filesize
));
145 ret
= (a
->compression_write
)(a
, &h
, sizeof(h
));
146 if (ret
!= ARCHIVE_OK
)
147 return (ARCHIVE_FATAL
);
149 ret
= (a
->compression_write
)(a
, path
, pathlength
);
150 if (ret
!= ARCHIVE_OK
)
151 return (ARCHIVE_FATAL
);
153 cpio
->entry_bytes_remaining
= st
->st_size
;
155 /* Write the symlink now. */
156 if (p
!= NULL
&& *p
!= '\0')
157 ret
= (a
->compression_write
)(a
, p
, strlen(p
));
163 archive_write_cpio_data(struct archive
*a
, const void *buff
, size_t s
)
168 cpio
= a
->format_data
;
169 if (s
> cpio
->entry_bytes_remaining
)
170 s
= cpio
->entry_bytes_remaining
;
172 ret
= (a
->compression_write
)(a
, buff
, s
);
173 cpio
->entry_bytes_remaining
-= s
;
178 * Format a number into the specified field.
181 format_octal(int64_t v
, void *p
, int digits
)
186 max
= (((int64_t)1) << (digits
* 3)) - 1;
187 if (v
>= 0 && v
<= max
) {
188 format_octal_recursive(v
, p
, digits
);
191 format_octal_recursive(max
, p
, digits
);
198 format_octal_recursive(int64_t v
, char *p
, int s
)
202 v
= format_octal_recursive(v
, p
+1, s
-1);
208 archive_write_cpio_finish(struct archive
*a
)
213 struct archive_entry
*trailer
;
215 cpio
= a
->format_data
;
216 trailer
= archive_entry_new();
217 memset(&st
, 0, sizeof(st
));
219 archive_entry_copy_stat(trailer
, &st
);
220 archive_entry_set_pathname(trailer
, "TRAILER!!!");
221 er
= archive_write_cpio_header(a
, trailer
);
222 archive_entry_free(trailer
);
225 a
->format_data
= NULL
;
230 archive_write_cpio_finish_entry(struct archive
*a
)
235 cpio
= a
->format_data
;
237 while (cpio
->entry_bytes_remaining
> 0) {
238 to_write
= cpio
->entry_bytes_remaining
< a
->null_length
?
239 cpio
->entry_bytes_remaining
: a
->null_length
;
240 ret
= (a
->compression_write
)(a
, a
->nulls
, to_write
);
241 if (ret
!= ARCHIVE_OK
)
243 cpio
->entry_bytes_remaining
-= to_write
;