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author | kientzle <kientzle@FreeBSD.org> | 2004-02-09 23:22:54 +0000 |
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committer | kientzle <kientzle@FreeBSD.org> | 2004-02-09 23:22:54 +0000 |
commit | af9413b539628b0758b4af66ffbb879fba49cc6d (patch) | |
tree | 20e1d80fd0a1d288a08af1696ee258bcd08f41d0 /lib/libarchive/archive_read_open_file.c | |
parent | 6b6e533f7e91602d4ccb3353351eb9f816c2daf2 (diff) | |
download | FreeBSD-src-af9413b539628b0758b4af66ffbb879fba49cc6d.zip FreeBSD-src-af9413b539628b0758b4af66ffbb879fba49cc6d.tar.gz |
Initial import of libarchive.
What it is:
A library for reading and writing various streaming archive
formats, especially tar and cpio. Being a library, it should
be easy to incorporate into pkg_* tools, sysinstall, and any
other place that needs to read or write such archives.
Features:
* Full automatic detection of both compression and archive format.
* Extensible internal architecture to make it easy to add new formats.
* Support for "pax interchange format," a new POSIX-standard tar format
that eliminates essentially all of the restrictions of historic formats.
* BSD license
Thanks to: jkh for pushing me to start this work, gordon for
encouraging me to commit it, bde for answering endless style
questions, and many others for feedback and encouragement.
Status: Pretty good overall, though there are still a few rough edges and
the library could always use more testing. Feedback eagerly solicited.
Diffstat (limited to 'lib/libarchive/archive_read_open_file.c')
-rw-r--r-- | lib/libarchive/archive_read_open_file.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/libarchive/archive_read_open_file.c b/lib/libarchive/archive_read_open_file.c new file mode 100644 index 0000000..f2fdc63 --- /dev/null +++ b/lib/libarchive/archive_read_open_file.c @@ -0,0 +1,109 @@ +/*- + * 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("$FreeBSD$"); + +#ifdef DMALLOC +#include <dmalloc.h> +#endif +#include <errno.h> +#include <fcntl.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "archive.h" + +struct read_file_data { + int fd; + size_t block_size; + void *buffer; + char filename[1]; +}; + +static int file_close(struct archive *, void *); +static int file_open(struct archive *, void *); +static ssize_t file_read(struct archive *, void *, const void **buff); + +int +archive_read_open_file(struct archive *a, const char *filename, + size_t block_size) +{ + struct read_file_data *mine; + + /* XXX detect and report malloc failure XXX */ + if (filename == NULL) { + mine = malloc(sizeof(*mine)); + mine->filename[0] = 0; + } else { + mine = malloc(sizeof(*mine) + strlen(filename)); + strcpy(mine->filename, filename); + } + mine->block_size = block_size; + mine->buffer = malloc(mine->block_size); + mine->fd = -1; + return (archive_read_open(a, mine, file_open, file_read, file_close)); +} + +static int +file_open(struct archive *a, void *client_data) +{ + struct read_file_data *mine = client_data; + + if (*mine->filename != 0) + mine->fd = open(mine->filename, O_RDONLY); + else + mine->fd = 0; + if (mine->fd < 0) { + archive_set_error(a, errno, "Failed to open '%s'", + mine->filename); + return (ARCHIVE_FATAL); + } + return (0); +} + +static ssize_t +file_read(struct archive *a, void *client_data, const void **buff) +{ + struct read_file_data *mine = client_data; + + (void)a; /* UNUSED */ + *buff = mine->buffer; + return (read(mine->fd, mine->buffer, mine->block_size)); +} + +static int +file_close(struct archive *a, void *client_data) +{ + struct read_file_data *mine = client_data; + + (void)a; /* UNUSED */ + if (mine->fd >= 0) + close(mine->fd); + free(mine); + return (ARCHIVE_OK); +} |