diff options
Diffstat (limited to 'lib/libarchive/archive_write_open_file.c')
| -rw-r--r-- | lib/libarchive/archive_write_open_file.c | 166 |
1 files changed, 166 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 0000000..65cdbb6 --- /dev/null +++ b/lib/libarchive/archive_write_open_file.c @@ -0,0 +1,166 @@ +/*- + * 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> +#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 { + 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) +{ + struct write_file_data *mine; + + if (filename == NULL || filename[0] == '\0') { + mine = malloc(sizeof(*mine)); + if (mine == NULL) { + archive_set_error(a, ENOMEM, "No memory"); + return (ARCHIVE_FATAL); + } + mine->filename[0] = '\0'; /* Record that we're using stdout. */ + } else { + mine = malloc(sizeof(*mine) + strlen(filename)); + if (mine == NULL) { + archive_set_error(a, ENOMEM, "No memory"); + return (ARCHIVE_FATAL); + } + strcpy(mine->filename, filename); + } + 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, *pst; + + pst = NULL; + mine = client_data; + flags = O_WRONLY | O_CREAT | O_TRUNC; + + if (mine->filename[0] != '\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) { + if (fstat(mine->fd, &st) == 0) { + pst = &st; + if (S_ISCHR(st.st_mode) || + S_ISBLK(st.st_mode) || + S_ISFIFO(st.st_mode)) + /* Pad last block. */ + archive_write_set_bytes_in_last_block(a, 0); + else + /* Don't pad last block. */ + 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 '%s'", + mine->filename); + return (ARCHIVE_FATAL); + } + + if (pst == NULL && fstat(mine->fd, &st) == 0) + pst = &st; + if (pst == NULL) { + archive_set_error(a, errno, "Couldn't stat '%s'", + mine->filename); + return (ARCHIVE_FATAL); + } + + /* + * If the output file is a regular file, don't add it to + * itself. If it's a device file, it's okay to add the device + * entry to the output archive. + */ + if (S_ISREG(pst->st_mode)) { + a->skip_file_dev = pst->st_dev; + a->skip_file_ino = pst->st_ino; + } + + return (ARCHIVE_OK); +} + +static ssize_t +file_write(struct archive *a, void *client_data, void *buff, size_t length) +{ + struct write_file_data *mine; + ssize_t bytesWritten; + + mine = client_data; + bytesWritten = write(mine->fd, buff, length); + if (bytesWritten <= 0) { + archive_set_error(a, errno, "Write error"); + return (-1); + } + return (bytesWritten); +} + +static int +file_close(struct archive *a, void *client_data) +{ + struct write_file_data *mine = client_data; + + (void)a; /* UNUSED */ + if (mine->filename[0] != '\0') + close(mine->fd); + free(mine); + return (ARCHIVE_OK); +} |
