freebsd-dev/lib/libarchive/archive_write_open_file.c
Tim Kientzle df3c1316b0 Many fixes.
Portability: Thanks to Juergen Lock, libarchive now compiles cleanly
on Linux.  Along the way, I cleaned up a lot of error return codes and
reorganized some code to simplify conditional compilation of certain
sections.

Bug fixes:
  * pax format now actually stores filenames that are 101-154
    characters long.
  * pax format now allows newline characters in extended attributes
    (this fixes a long-standing bug in ACL handling)
  * mtime/atime are now restored for directories
  * directory list is now sorted prior to fix-up to permit
    correct restore of non-writable dir heirarchies
2004-03-09 19:50:41 +00:00

150 lines
4.0 KiB
C

/*-
* Copyright (c) 2003-2004 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
* in this position and unchanged.
* 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("$FreeBSD$");
#include <sys/stat.h>
#ifdef HAVE_DMALLOC
#include <dmalloc.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "archive.h"
#include "archive_private.h"
struct write_file_data {
intmax_t offset;
int fd;
char filename[1];
};
static int file_close(struct archive *, void *);
static int file_open(struct archive *, void *);
static ssize_t file_write(struct archive *, void *, void *buff, size_t);
int
archive_write_open_file(struct archive *a, const char *filename)
{
return (archive_write_open_file_position(a, filename, 0));
}
int
archive_write_open_file_position(struct archive *a, const char *filename,
int64_t offset)
{
struct write_file_data *mine;
if (filename == NULL) {
mine = malloc(sizeof(*mine));
mine->filename[0] = 0;
} else {
mine = malloc(sizeof(*mine) + strlen(filename));
strcpy(mine->filename, filename);
}
mine->offset = offset;
mine->fd = -1;
return (archive_write_open(a, mine,
file_open, file_write, file_close));
}
static int
file_open(struct archive *a, void *client_data)
{
int flags;
struct write_file_data *mine;
struct stat st;
mine = client_data;
if (mine->offset == 0)
flags = O_WRONLY | O_CREAT | O_TRUNC;
else
flags = O_WRONLY;
if (*mine->filename != 0) {
mine->fd = open(mine->filename, flags, 0666);
/*
* If client hasn't explicitly set the last block
* handling, then set it here: If the output is a
* block or character device, pad the last block,
* otherwise leave it unpadded.
*/
if (mine->fd >= 0 && a->bytes_in_last_block < 0) {
/* Last block will be fully padded. */
fstat(mine->fd, &st);
if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
S_ISFIFO(st.st_mode))
archive_write_set_bytes_in_last_block(a, 0);
else
archive_write_set_bytes_in_last_block(a, 1);
}
} else {
mine->fd = 1;
if (a->bytes_in_last_block < 0) /* Still default? */
/* Last block will be fully padded. */
archive_write_set_bytes_in_last_block(a, 0);
}
if (mine->fd < 0) {
archive_set_error(a, errno, "Failed to open");
return -1;
}
if (mine->offset > 0) {
lseek(mine->fd, mine->offset, SEEK_SET);
ftruncate(mine->fd, mine->offset);
}
return (ARCHIVE_OK);
}
static ssize_t
file_write(struct archive *a, void *client_data, void *buff, size_t length)
{
struct write_file_data *mine;
(void)a; /* UNUSED */
mine = client_data;
return (write(mine->fd, buff, length));
}
static int
file_close(struct archive *a, void *client_data)
{
struct write_file_data *mine = client_data;
(void)a; /* UNUSED */
if (mine->fd >= 0)
close(mine->fd);
free(mine);
return (ARCHIVE_OK);
}