7b4a925302
This fixes issues when writes fail (as example if the disk is full), where xbps would create empty repodata or stagedata archives.
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*-
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* Copyright (c) 2013-2019 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <dirent.h>
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#include <libgen.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <xbps.h>
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#include "defs.h"
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bool
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repodata_flush(struct xbps_handle *xhp, const char *repodir,
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const char *reponame, xbps_dictionary_t idx, xbps_dictionary_t meta,
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const char *compression)
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{
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struct archive *ar;
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char *repofile, *tname, *buf;
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int rv, repofd = -1;
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mode_t mask;
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bool result;
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/* Create a tempfile for our repository archive */
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repofile = xbps_repo_path_with_name(xhp, repodir, reponame);
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assert(repofile);
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tname = xbps_xasprintf("%s.XXXXXXXXXX", repofile);
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assert(tname);
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mask = umask(S_IXUSR|S_IRWXG|S_IRWXO);
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if ((repofd = mkstemp(tname)) == -1)
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return false;
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umask(mask);
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/* Create and write our repository archive */
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ar = archive_write_new();
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if (ar == NULL)
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return false;
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if (compression == NULL || strcmp(compression, "gzip") == 0) {
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archive_write_add_filter_gzip(ar);
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archive_write_set_options(ar, "compression-level=9");
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} else if (strcmp(compression, "bzip2") == 0) {
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archive_write_add_filter_bzip2(ar);
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archive_write_set_options(ar, "compression-level=9");
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} else if (strcmp(compression, "lz4") == 0) {
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archive_write_add_filter_lz4(ar);
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archive_write_set_options(ar, "compression-level=9");
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} else if (strcmp(compression, "xz") == 0) {
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archive_write_add_filter_xz(ar);
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} else if (strcmp(compression, "zstd") == 0) {
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archive_write_add_filter_zstd(ar);
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archive_write_set_options(ar, "compression-level=19");
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} else if (strcmp(compression, "none") == 0) {
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/* empty */
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} else {
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return false;
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}
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archive_write_set_format_pax_restricted(ar);
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if (archive_write_open_fd(ar, repofd) != ARCHIVE_OK)
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return false;
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/* XBPS_REPOIDX */
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buf = xbps_dictionary_externalize(idx);
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if (buf == NULL)
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return false;
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rv = xbps_archive_append_buf(ar, buf, strlen(buf),
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XBPS_REPOIDX, 0644, "root", "root");
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free(buf);
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if (rv != 0)
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return false;
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/* XBPS_REPOIDX_META */
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if (meta == NULL) {
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/* fake entry */
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buf = strdup("DEADBEEF");
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if (buf == NULL)
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return false;
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} else {
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buf = xbps_dictionary_externalize(meta);
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}
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rv = xbps_archive_append_buf(ar, buf, strlen(buf),
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XBPS_REPOIDX_META, 0644, "root", "root");
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free(buf);
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if (rv != 0)
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return false;
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/* Write data to tempfile and rename */
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if (archive_write_close(ar) != ARCHIVE_OK)
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return false;
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if (archive_write_free(ar) != ARCHIVE_OK)
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return false;
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#ifdef HAVE_FDATASYNC
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fdatasync(repofd);
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#else
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fsync(repofd);
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#endif
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if (fchmod(repofd, 0664) == -1) {
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close(repofd);
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unlink(tname);
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result = false;
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goto out;
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}
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close(repofd);
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if (rename(tname, repofile) == -1) {
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unlink(tname);
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result = false;
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goto out;
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}
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result = true;
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out:
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free(repofile);
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free(tname);
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return result;
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}
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