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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_data_into_fd.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_data_into_fd.c')
-rw-r--r-- | lib/libarchive/archive_read_data_into_fd.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/libarchive/archive_read_data_into_fd.c b/lib/libarchive/archive_read_data_into_fd.c new file mode 100644 index 0000000..7dad233 --- /dev/null +++ b/lib/libarchive/archive_read_data_into_fd.c @@ -0,0 +1,64 @@ +/*- + * 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 <unistd.h> + +#include "archive.h" +#include "archive_private.h" + +/* + * This implementation minimizes copying of data. + */ +ssize_t +archive_read_data_into_fd(struct archive *a, int fd) +{ + ssize_t bytes_read, bytes_written, total_written; + const void *buff; + + total_written = 0; + while (a->entry_bytes_remaining > 0) { + bytes_read = (a->compression_read_ahead)(a, &buff, + a->entry_bytes_remaining); + if (bytes_read < 0) + return (-1); + if ((size_t)bytes_read > a->entry_bytes_remaining) + bytes_read = (ssize_t)a->entry_bytes_remaining; + + bytes_written = write(fd, buff, bytes_read); + if (bytes_written < 0) + return (-1); + (a->compression_read_consume)(a, bytes_written); + total_written += bytes_written; + a->entry_bytes_remaining -= bytes_written; + } + return (total_written); +} |