diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_filter_lrzip.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_filter_lrzip.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_filter_lrzip.c b/Utilities/cmlibarchive/libarchive/archive_read_support_filter_lrzip.c new file mode 100644 index 000000000..c82a8e2f1 --- /dev/null +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_filter_lrzip.c @@ -0,0 +1,132 @@ +/*- + * Copyright (c) 2003-2007 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. + * 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("$FreeBSD$"); + + +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "archive.h" +#include "archive_private.h" +#include "archive_read_private.h" + +#define LRZIP_HEADER_MAGIC "LRZI" +#define LRZIP_HEADER_MAGIC_LEN 4 + +static int lrzip_bidder_bid(struct archive_read_filter_bidder *, + struct archive_read_filter *); +static int lrzip_bidder_init(struct archive_read_filter *); + + +static int +lrzip_reader_free(struct archive_read_filter_bidder *self) +{ + (void)self; /* UNUSED */ + return (ARCHIVE_OK); +} + +int +archive_read_support_filter_lrzip(struct archive *_a) +{ + struct archive_read *a = (struct archive_read *)_a; + struct archive_read_filter_bidder *reader; + + archive_check_magic(_a, ARCHIVE_READ_MAGIC, + ARCHIVE_STATE_NEW, "archive_read_support_filter_lrzip"); + + if (__archive_read_get_bidder(a, &reader) != ARCHIVE_OK) + return (ARCHIVE_FATAL); + + reader->data = NULL; + reader->name = "lrzip"; + reader->bid = lrzip_bidder_bid; + reader->init = lrzip_bidder_init; + reader->options = NULL; + reader->free = lrzip_reader_free; + /* This filter always uses an external program. */ + archive_set_error(_a, ARCHIVE_ERRNO_MISC, + "Using external lrzip program for lrzip decompression"); + return (ARCHIVE_WARN); +} + +/* + * Bidder just verifies the header and returns the number of verified bits. + */ +static int +lrzip_bidder_bid(struct archive_read_filter_bidder *self, + struct archive_read_filter *filter) +{ + const unsigned char *p; + ssize_t avail, len; + int i; + + (void)self; /* UNUSED */ + /* Start by looking at the first six bytes of the header, which + * is all fixed layout. */ + len = 6; + p = __archive_read_filter_ahead(filter, len, &avail); + if (p == NULL || avail == 0) + return (0); + + if (memcmp(p, LRZIP_HEADER_MAGIC, LRZIP_HEADER_MAGIC_LEN)) + return (0); + + /* current major version is always 0, verify this */ + if (p[LRZIP_HEADER_MAGIC_LEN]) + return 0; + /* support only v0.6+ lrzip for sanity */ + i = p[LRZIP_HEADER_MAGIC_LEN + 1]; + if ((i < 6) || (i > 10)) + return 0; + + return (int)len; +} + +static int +lrzip_bidder_init(struct archive_read_filter *self) +{ + int r; + + r = __archive_read_program(self, "lrzip -d -q"); + /* Note: We set the format here even if __archive_read_program() + * above fails. We do, after all, know what the format is + * even if we weren't able to read it. */ + self->code = ARCHIVE_FILTER_LRZIP; + self->name = "lrzip"; + return (r); +} |