diff options
Diffstat (limited to 'lib/libarchive/archive_write_open_file.c')
| -rw-r--r-- | lib/libarchive/archive_write_open_file.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/lib/libarchive/archive_write_open_file.c b/lib/libarchive/archive_write_open_file.c new file mode 100644 index 000000000000..65d3d45272d1 --- /dev/null +++ b/lib/libarchive/archive_write_open_file.c @@ -0,0 +1,149 @@ +/*- + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/stat.h> +#ifdef 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); +} |