df3c1316b0
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
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#ifdef HAVE_DMALLOC
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#include <dmalloc.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "archive.h"
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#include "archive_private.h"
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struct write_file_data {
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intmax_t offset;
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int fd;
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char filename[1];
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};
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static int file_close(struct archive *, void *);
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static int file_open(struct archive *, void *);
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static ssize_t file_write(struct archive *, void *, void *buff, size_t);
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int
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archive_write_open_file(struct archive *a, const char *filename)
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{
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return (archive_write_open_file_position(a, filename, 0));
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}
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int
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archive_write_open_file_position(struct archive *a, const char *filename,
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int64_t offset)
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{
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struct write_file_data *mine;
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if (filename == NULL) {
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mine = malloc(sizeof(*mine));
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mine->filename[0] = 0;
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} else {
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mine = malloc(sizeof(*mine) + strlen(filename));
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strcpy(mine->filename, filename);
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}
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mine->offset = offset;
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mine->fd = -1;
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return (archive_write_open(a, mine,
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file_open, file_write, file_close));
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}
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static int
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file_open(struct archive *a, void *client_data)
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{
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int flags;
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struct write_file_data *mine;
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struct stat st;
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mine = client_data;
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if (mine->offset == 0)
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flags = O_WRONLY | O_CREAT | O_TRUNC;
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else
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flags = O_WRONLY;
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if (*mine->filename != 0) {
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mine->fd = open(mine->filename, flags, 0666);
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/*
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* If client hasn't explicitly set the last block
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* handling, then set it here: If the output is a
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* block or character device, pad the last block,
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* otherwise leave it unpadded.
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*/
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if (mine->fd >= 0 && a->bytes_in_last_block < 0) {
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/* Last block will be fully padded. */
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fstat(mine->fd, &st);
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if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
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S_ISFIFO(st.st_mode))
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archive_write_set_bytes_in_last_block(a, 0);
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else
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archive_write_set_bytes_in_last_block(a, 1);
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}
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} else {
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mine->fd = 1;
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if (a->bytes_in_last_block < 0) /* Still default? */
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/* Last block will be fully padded. */
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archive_write_set_bytes_in_last_block(a, 0);
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}
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if (mine->fd < 0) {
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archive_set_error(a, errno, "Failed to open");
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return -1;
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}
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if (mine->offset > 0) {
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lseek(mine->fd, mine->offset, SEEK_SET);
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ftruncate(mine->fd, mine->offset);
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}
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return (ARCHIVE_OK);
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}
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static ssize_t
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file_write(struct archive *a, void *client_data, void *buff, size_t length)
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{
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struct write_file_data *mine;
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(void)a; /* UNUSED */
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mine = client_data;
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return (write(mine->fd, buff, length));
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}
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static int
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file_close(struct archive *a, void *client_data)
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{
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struct write_file_data *mine = client_data;
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(void)a; /* UNUSED */
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if (mine->fd >= 0)
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close(mine->fd);
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free(mine);
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return (ARCHIVE_OK);
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}
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