kolan
/
CMake
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
CMake/Utilities/cmlibarchive/libarchive/archive_write_set_format_cp...

272 lines
8.3 KiB
C
Raw Blame History

/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
__FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_format_cpio.c,v 1.14 2008/03/15 11:04:45 kientzle Exp $");
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_write_private.h"
static ssize_t archive_write_cpio_data(struct archive_write *,
const void *buff, size_t s);
static int archive_write_cpio_finish(struct archive_write *);
static int archive_write_cpio_destroy(struct archive_write *);
static int archive_write_cpio_finish_entry(struct archive_write *);
static int archive_write_cpio_header(struct archive_write *,
struct archive_entry *);
static int format_octal(int64_t, void *, int);
static int64_t format_octal_recursive(int64_t, char *, int);
struct cpio {
uint64_t entry_bytes_remaining;
};
struct cpio_header {
char c_magic[6];
char c_dev[6];
char c_ino[6];
char c_mode[6];
char c_uid[6];
char c_gid[6];
char c_nlink[6];
char c_rdev[6];
char c_mtime[11];
char c_namesize[6];
char c_filesize[11];
};
/*
* Set output format to 'cpio' format.
*/
int
archive_write_set_format_cpio(struct archive *_a)
{
struct archive_write *a = (struct archive_write *)_a;
struct cpio *cpio;
/* If someone else was already registered, unregister them. */
if (a->format_destroy != NULL)
(a->format_destroy)(a);
cpio = (struct cpio *)malloc(sizeof(*cpio));
if (cpio == NULL) {
archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data");
return (ARCHIVE_FATAL);
}
memset(cpio, 0, sizeof(*cpio));
a->format_data = cpio;
a->pad_uncompressed = 1;
a->format_name = "cpio";
a->format_write_header = archive_write_cpio_header;
a->format_write_data = archive_write_cpio_data;
a->format_finish_entry = archive_write_cpio_finish_entry;
a->format_finish = archive_write_cpio_finish;
a->format_destroy = archive_write_cpio_destroy;
a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX;
a->archive.archive_format_name = "POSIX cpio";
return (ARCHIVE_OK);
}
static int
archive_write_cpio_header(struct archive_write *a, struct archive_entry *entry)
{
struct cpio *cpio;
const char *p, *path;
int pathlength, ret;
int64_t ino;
struct cpio_header h;
cpio = (struct cpio *)a->format_data;
ret = 0;
path = archive_entry_pathname(entry);
pathlength = strlen(path) + 1; /* Include trailing null. */
memset(&h, 0, sizeof(h));
format_octal(070707, &h.c_magic, sizeof(h.c_magic));
format_octal(archive_entry_dev(entry), &h.c_dev, sizeof(h.c_dev));
/*
* TODO: Generate artificial inode numbers rather than just
* re-using the ones off the disk. That way, the 18-bit c_ino
* field only limits the number of files in the archive.
*/
ino = archive_entry_ino64(entry);
if (ino < 0 || ino > 0777777) {
archive_set_error(&a->archive, ERANGE,
"large inode number truncated");
ret = ARCHIVE_WARN;
}
format_octal(archive_entry_ino64(entry) & 0777777, &h.c_ino, sizeof(h.c_ino));
format_octal(archive_entry_mode(entry), &h.c_mode, sizeof(h.c_mode));
format_octal(archive_entry_uid(entry), &h.c_uid, sizeof(h.c_uid));
format_octal(archive_entry_gid(entry), &h.c_gid, sizeof(h.c_gid));
format_octal(archive_entry_nlink(entry), &h.c_nlink, sizeof(h.c_nlink));
if (archive_entry_filetype(entry) == AE_IFBLK
|| archive_entry_filetype(entry) == AE_IFCHR)
format_octal(archive_entry_dev(entry), &h.c_rdev, sizeof(h.c_rdev));
else
format_octal(0, &h.c_rdev, sizeof(h.c_rdev));
format_octal(archive_entry_mtime(entry), &h.c_mtime, sizeof(h.c_mtime));
format_octal(pathlength, &h.c_namesize, sizeof(h.c_namesize));
/* Non-regular files don't store bodies. */
if (archive_entry_filetype(entry) != AE_IFREG)
archive_entry_set_size(entry, 0);
/* Symlinks get the link written as the body of the entry. */
p = archive_entry_symlink(entry);
if (p != NULL && *p != '\0')
format_octal(strlen(p), &h.c_filesize, sizeof(h.c_filesize));
else
format_octal(archive_entry_size(entry),
&h.c_filesize, sizeof(h.c_filesize));
ret = (a->compressor.write)(a, &h, sizeof(h));
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
ret = (a->compressor.write)(a, path, pathlength);
if (ret != ARCHIVE_OK)
return (ARCHIVE_FATAL);
cpio->entry_bytes_remaining = archive_entry_size(entry);
/* Write the symlink now. */
if (p != NULL && *p != '\0')
ret = (a->compressor.write)(a, p, strlen(p));
return (ret);
}
static ssize_t
archive_write_cpio_data(struct archive_write *a, const void *buff, size_t s)
{
struct cpio *cpio;
int ret;
cpio = (struct cpio *)a->format_data;
if (s > cpio->entry_bytes_remaining)
s = cpio->entry_bytes_remaining;
ret = (a->compressor.write)(a, buff, s);
cpio->entry_bytes_remaining -= s;
if (ret >= 0)
return (s);
else
return (ret);
}
/*
* Format a number into the specified field.
*/
static int
format_octal(int64_t v, void *p, int digits)
{
int64_t max;
int ret;
max = (((int64_t)1) << (digits * 3)) - 1;
if (v >= 0 && v <= max) {
format_octal_recursive(v, (char *)p, digits);
ret = 0;
} else {
format_octal_recursive(max, (char *)p, digits);
ret = -1;
}
return (ret);
}
static int64_t
format_octal_recursive(int64_t v, char *p, int s)
{
if (s == 0)
return (v);
v = format_octal_recursive(v, p+1, s-1);
*p = '0' + (v & 7);
return (v >>= 3);
}
static int
archive_write_cpio_finish(struct archive_write *a)
{
struct cpio *cpio;
int er;
struct archive_entry *trailer;
cpio = (struct cpio *)a->format_data;
trailer = archive_entry_new();
/* nlink = 1 here for GNU cpio compat. */
archive_entry_set_nlink(trailer, 1);
archive_entry_set_pathname(trailer, "TRAILER!!!");
er = archive_write_cpio_header(a, trailer);
archive_entry_free(trailer);
return (er);
}
static int
archive_write_cpio_destroy(struct archive_write *a)
{
struct cpio *cpio;
cpio = (struct cpio *)a->format_data;
free(cpio);
a->format_data = NULL;
return (ARCHIVE_OK);
}
static int
archive_write_cpio_finish_entry(struct archive_write *a)
{
struct cpio *cpio;
int to_write, ret;
cpio = (struct cpio *)a->format_data;
ret = ARCHIVE_OK;
while (cpio->entry_bytes_remaining > 0) {
to_write = cpio->entry_bytes_remaining < a->null_length ?
cpio->entry_bytes_remaining : a->null_length;
ret = (a->compressor.write)(a, a->nulls, to_write);
if (ret != ARCHIVE_OK)
return (ret);
cpio->entry_bytes_remaining -= to_write;
}
return (ret);
}
Reference in New Issue View Git Blame Copy Permalink