0f8fa3629e
* If write block size is zero, don't block at all.
This supports the unusual requirement of applications
that need "no-delay" writes.
* Expose _write_finish_entry() to give such applications more
control over write boundaries. (Normal applications do not
need this, as entries are completed automatically.)
* Correct the type of write callbacks; this is a minor API
change that does not affect the ABI.
* Correct the error handling in _write_next_header() around
completing the previous entry.
* Correct the documentation for block-size markers: Remove
docs for the long-defunct _read_set_block_size(); document
all of the write block size manipulators.
MFC after: 14 days
134 lines
3.7 KiB
C
134 lines
3.7 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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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "archive.h"
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struct write_fd_data {
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off_t offset;
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int fd;
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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 *, const void *buff, size_t);
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int
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archive_write_open_fd(struct archive *a, int fd)
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{
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struct write_fd_data *mine;
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mine = (struct write_fd_data *)malloc(sizeof(*mine));
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if (mine == NULL) {
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archive_set_error(a, ENOMEM, "No memory");
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return (ARCHIVE_FATAL);
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}
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mine->fd = fd;
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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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struct write_fd_data *mine;
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struct stat st;
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mine = (struct write_fd_data *)client_data;
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if (fstat(mine->fd, &st) != 0) {
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archive_set_error(a, errno, "Couldn't stat fd %d", mine->fd);
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return (ARCHIVE_FATAL);
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}
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/*
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* If this is a regular file, don't add it to itself.
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*/
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if (S_ISREG(st.st_mode))
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archive_write_set_skip_file(a, st.st_dev, st.st_ino);
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/*
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* If client hasn't explicitly set the last block handling,
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* then set it here.
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*/
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if (archive_write_get_bytes_in_last_block(a) < 0) {
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/* If the output is a block or character device, fifo,
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* or stdout, pad the last block, otherwise leave it
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* unpadded. */
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if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
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S_ISFIFO(st.st_mode) || (mine->fd == 1))
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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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else
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archive_write_set_bytes_in_last_block(a, 1);
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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, const void *buff, size_t length)
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{
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struct write_fd_data *mine;
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ssize_t bytesWritten;
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mine = (struct write_fd_data *)client_data;
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bytesWritten = write(mine->fd, buff, length);
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if (bytesWritten <= 0) {
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archive_set_error(a, errno, "Write error");
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return (-1);
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}
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return (bytesWritten);
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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_fd_data *mine = (struct write_fd_data *)client_data;
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(void)a; /* UNUSED */
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free(mine);
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return (ARCHIVE_OK);
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}
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