archive.c

/*-
 * Copyright (c) 2008-2014 Juan Romero Pardines.
 * 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 ``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 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 <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
 
#include <archive.h>
#include <archive_entry.h>
 
#include "xbps_api_impl.h"
 
char HIDDEN *
xbps_archive_get_file(struct archive *ar, struct archive_entry *entry)
{
        size_t buflen;
        ssize_t nbytes = -1;
        char *buf;
 
        assert(ar != NULL);
        assert(entry != NULL);
 
        buflen = (size_t)archive_entry_size(entry);
        buf = malloc(buflen+1);
        if (buf == NULL)
                return NULL;
 
        nbytes = archive_read_data(ar, buf, buflen);
        if ((size_t)nbytes != buflen) {
                free(buf);
                return NULL;
        }
        buf[buflen] = '\0';
        return buf;
}
 
xbps_dictionary_t HIDDEN
xbps_archive_get_dictionary(struct archive *ar, struct archive_entry *entry)
{
        xbps_dictionary_t d = NULL;
        char *buf;
 
        if ((buf = xbps_archive_get_file(ar, entry)) == NULL)
                return NULL;
 
        /* If blob is already a dictionary we are done */
        d = xbps_dictionary_internalize(buf);
        free(buf);
        return d;
}
 
int
xbps_archive_append_buf(struct archive *ar, const void *buf, const size_t buflen,
        const char *fname, const mode_t mode, const char *uname, const char *gname)
{
        struct archive_entry *entry;
 
        assert(ar);
        assert(buf);
        assert(fname);
        assert(uname);
        assert(gname);
 
        entry = archive_entry_new();
        if (entry == NULL)
                return archive_errno(ar);
 
        archive_entry_set_filetype(entry, AE_IFREG);
        archive_entry_set_perm(entry, mode);
        archive_entry_set_uname(entry, uname);
        archive_entry_set_gname(entry, gname);
        archive_entry_set_pathname(entry, fname);
        archive_entry_set_size(entry, buflen);
 
        if (archive_write_header(ar, entry) != ARCHIVE_OK) {
                archive_entry_free(entry);
                return archive_errno(ar);
        }
        if (archive_write_data(ar, buf, buflen) != ARCHIVE_OK) {
                archive_entry_free(entry);
                return archive_errno(ar);
        }
        if (archive_write_finish_entry(ar) != ARCHIVE_OK) {
                archive_entry_free(entry);
                return archive_errno(ar);
        }
        archive_entry_free(entry);
 
        return 0;
}