a72cbf3c23
On some systems, something like this happens: package_unpack.c:375:11: error: 'buf' may be used uninitialized in this function This is not actually a bug as logically `buf` is always initialized in that place, but gcc doesn't like it anyway.
670 lines
18 KiB
C
670 lines
18 KiB
C
/*-
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* Copyright (c) 2008-2015 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 <fcntl.h>
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#include <unistd.h>
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#include <libgen.h>
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#include "xbps_api_impl.h"
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static int
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set_extract_flags(uid_t euid)
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{
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int flags;
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if (euid == 0)
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flags = FEXTRACT_FLAGS;
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else
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flags = EXTRACT_FLAGS;
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return flags;
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}
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static bool
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match_preserved_file(struct xbps_handle *xhp, const char *entry)
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{
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char *file;
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if (xhp->preserved_files == NULL)
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return false;
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if (entry[0] == '.' && entry[1] != '\0') {
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file = strchr(entry, '.') + 1;
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assert(file);
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} else {
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file = __UNCONST(entry);
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}
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return xbps_match_string_in_array(xhp->preserved_files, file);
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}
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static int
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unpack_archive(struct xbps_handle *xhp,
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xbps_dictionary_t pkg_repod,
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const char *pkgver,
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const char *fname,
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struct archive *ar)
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{
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xbps_dictionary_t binpkg_propsd, binpkg_filesd, pkg_filesd, obsd;
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xbps_array_t array, obsoletes;
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xbps_data_t data;
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const struct stat *entry_statp;
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void *instbuf = NULL, *rembuf = NULL;
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struct stat st;
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struct xbps_unpack_cb_data xucd;
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struct archive_entry *entry;
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size_t instbufsiz = 0, rembufsiz = 0;
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ssize_t entry_size;
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const char *entry_pname, *transact, *binpkg_pkgver;
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char *pkgname, *buf = NULL;
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int ar_rv, rv, error, entry_type, flags;
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bool preserve, update, file_exists, keep_conf_file;
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bool skip_extract, force, xucd_stats;
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uid_t euid;
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binpkg_propsd = binpkg_filesd = pkg_filesd = NULL;
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force = preserve = update = file_exists = false;
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xucd_stats = false;
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ar_rv = rv = error = entry_type = flags = 0;
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xbps_dictionary_get_bool(pkg_repod, "preserve", &preserve);
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xbps_dictionary_get_cstring_nocopy(pkg_repod, "transaction", &transact);
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memset(&xucd, 0, sizeof(xucd));
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euid = geteuid();
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pkgname = xbps_pkg_name(pkgver);
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assert(pkgname);
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if (xhp->flags & XBPS_FLAG_FORCE_UNPACK)
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force = true;
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if (strcmp(transact, "update") == 0)
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update = true;
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/*
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* Remove obsolete files.
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*/
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if (!preserve &&
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xbps_dictionary_get_dict(xhp->transd, "obsolete_files", &obsd) &&
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(obsoletes = xbps_dictionary_get(obsd, pkgname))) {
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for (unsigned int i = 0; i < xbps_array_count(obsoletes); i++) {
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const char *file = NULL;
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xbps_array_get_cstring_nocopy(obsoletes, i, &file);
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if (remove(file) == -1) {
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xbps_set_cb_state(xhp,
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XBPS_STATE_REMOVE_FILE_OBSOLETE_FAIL,
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errno, pkgver,
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"%s: failed to remove obsolete entry `%s': %s",
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pkgver, file, strerror(errno));
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continue;
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}
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xbps_set_cb_state(xhp,
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XBPS_STATE_REMOVE_FILE_OBSOLETE,
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0, pkgver, "%s: removed obsolete entry: %s", pkgver, file);
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}
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}
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/*
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* Process the archive files.
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*/
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flags = set_extract_flags(euid);
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/*
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* First get all metadata files on archive in this order:
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* - INSTALL <optional>
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* - REMOVE <optional>
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* - props.plist <required> but currently ignored
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* - files.plist <required>
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*
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* The XBPS package must contain props and files plists, otherwise
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* it's not a valid package.
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*/
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for (uint8_t i = 0; i < 4; i++) {
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ar_rv = archive_read_next_header(ar, &entry);
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if (ar_rv == ARCHIVE_EOF || ar_rv == ARCHIVE_FATAL)
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break;
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entry_pname = archive_entry_pathname(entry);
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entry_size = archive_entry_size(entry);
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if (strcmp("./INSTALL", entry_pname) == 0) {
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/*
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* Store file in a buffer to execute it later.
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*/
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instbufsiz = entry_size;
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instbuf = malloc(entry_size);
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assert(instbuf);
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if (archive_read_data(ar, instbuf, entry_size) != entry_size) {
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rv = EINVAL;
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goto out;
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}
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} else if (strcmp("./REMOVE", entry_pname) == 0) {
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/*
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* Store file in a buffer to execute it later.
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*/
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rembufsiz = entry_size;
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rembuf = malloc(entry_size);
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assert(rembuf);
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if (archive_read_data(ar, rembuf, entry_size) != entry_size) {
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rv = EINVAL;
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goto out;
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}
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} else if (strcmp("./props.plist", entry_pname) == 0) {
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binpkg_propsd = xbps_archive_get_dictionary(ar, entry);
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if (binpkg_propsd == NULL) {
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rv = EINVAL;
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goto out;
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}
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} else if (strcmp("./files.plist", entry_pname) == 0) {
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binpkg_filesd = xbps_archive_get_dictionary(ar, entry);
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if (binpkg_filesd == NULL) {
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rv = EINVAL;
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goto out;
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}
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} else {
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archive_read_data_skip(ar);
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}
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if (binpkg_filesd)
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break;
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}
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/*
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* If there was any error extracting files from archive, error out.
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*/
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if (ar_rv == ARCHIVE_FATAL) {
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xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, rv, pkgver,
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"%s: [unpack] 1: failed to extract files: %s",
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pkgver, archive_error_string(ar));
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rv = EINVAL;
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goto out;
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}
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/*
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* Bail out if required metadata files are not in archive.
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*/
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if (binpkg_propsd == NULL || binpkg_filesd == NULL) {
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xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, ENODEV, pkgver,
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"%s: [unpack] invalid binary package `%s'.", pkgver, fname);
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rv = ENODEV;
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goto out;
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}
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/*
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* Check that the pkgver in the binpkg matches the one we're looking for.
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*/
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xbps_dictionary_get_cstring_nocopy(binpkg_propsd, "pkgver", &binpkg_pkgver);
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if (strcmp(pkgver, binpkg_pkgver) != 0) {
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xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, EINVAL, pkgver,
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"%s: [unpack] pkgver mismatch repodata: `%s' binpkg: `%s'.", fname, pkgver, binpkg_pkgver);
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rv = EINVAL;
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goto out;
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}
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/*
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* Internalize current pkg metadata files plist.
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*/
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pkg_filesd = xbps_pkgdb_get_pkg_files(xhp, pkgname);
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/* Add pkg install/remove scripts data objects into our dictionary */
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if (instbuf != NULL) {
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data = xbps_data_create_data(instbuf, instbufsiz);
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assert(data);
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xbps_dictionary_set(pkg_repod, "install-script", data);
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xbps_object_release(data);
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}
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if (rembuf != NULL) {
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data = xbps_data_create_data(rembuf, rembufsiz);
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assert(data);
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xbps_dictionary_set(pkg_repod, "remove-script", data);
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xbps_object_release(data);
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}
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/*
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* Execute INSTALL "pre" ACTION before unpacking files.
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*/
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if (instbuf != NULL) {
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rv = xbps_pkg_exec_buffer(xhp, instbuf, instbufsiz, pkgver, "pre", update);
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if (rv != 0) {
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xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, rv, pkgver,
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"%s: [unpack] INSTALL script failed to execute pre ACTION: %s",
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pkgver, strerror(rv));
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goto out;
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}
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}
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/*
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* Unpack all files on archive now.
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*/
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for (;;) {
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ar_rv = archive_read_next_header(ar, &entry);
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if (ar_rv == ARCHIVE_EOF || ar_rv == ARCHIVE_FATAL)
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break;
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else if (ar_rv == ARCHIVE_RETRY)
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continue;
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entry_pname = archive_entry_pathname(entry);
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entry_size = archive_entry_size(entry);
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entry_type = archive_entry_filetype(entry);
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entry_statp = archive_entry_stat(entry);
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/*
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* Ignore directories from archive.
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*/
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if (entry_type == AE_IFDIR) {
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archive_read_data_skip(ar);
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continue;
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}
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/*
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* Prepare unpack callback ops.
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*/
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if (xhp->unpack_cb != NULL) {
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xucd.xhp = xhp;
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xucd.pkgver = pkgver;
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xucd.entry = entry_pname;
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xucd.entry_size = entry_size;
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xucd.entry_is_conf = false;
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/*
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* Compute total entries in progress data, if set.
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* total_entries = files + conf_files + links.
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*/
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if (binpkg_filesd && !xucd_stats) {
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array = xbps_dictionary_get(binpkg_filesd, "files");
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xucd.entry_total_count +=
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(ssize_t)xbps_array_count(array);
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array = xbps_dictionary_get(binpkg_filesd, "conf_files");
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xucd.entry_total_count +=
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(ssize_t)xbps_array_count(array);
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array = xbps_dictionary_get(binpkg_filesd, "links");
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xucd.entry_total_count +=
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(ssize_t)xbps_array_count(array);
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xucd_stats = true;
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}
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}
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/*
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* Always check that extracted file exists and hash
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* doesn't match, in that case overwrite the file.
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* Otherwise skip extracting it.
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*/
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skip_extract = file_exists = keep_conf_file = false;
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if (lstat(entry_pname, &st) == 0)
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file_exists = true;
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/*
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* Check if the file to be extracted must be preserved, if true,
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* pass to the next file.
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*/
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if (file_exists && match_preserved_file(xhp, entry_pname)) {
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archive_read_data_skip(ar);
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xbps_dbg_printf(xhp, "[unpack] `%s' exists on disk "
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"and must be preserved, skipping.\n", entry_pname);
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xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FILE_PRESERVED, 0,
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pkgver, "%s: file `%s' won't be extracted, "
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"it's preserved.\n", pkgver, entry_pname);
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continue;
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}
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/*
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* Check if current entry is a configuration file,
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* that should be kept.
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*/
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if (!force && (entry_type == AE_IFREG)) {
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buf = strchr(entry_pname, '.') + 1;
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assert(buf != NULL);
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keep_conf_file = xbps_entry_is_a_conf_file(binpkg_filesd, buf);
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}
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/*
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* If file to be extracted does not match the file type of
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* file currently stored on disk and is not a conf file
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* that should be kept, remove file on disk.
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*/
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if (file_exists && !keep_conf_file &&
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((entry_statp->st_mode & S_IFMT) != (st.st_mode & S_IFMT)))
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(void)remove(entry_pname);
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if (!force && (entry_type == AE_IFREG)) {
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if (file_exists && (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) {
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/*
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* Handle configuration files.
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* Skip packages that don't have "conf_files"
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* array on its XBPS_PKGPROPS
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* dictionary.
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*/
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if (keep_conf_file) {
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if (xhp->unpack_cb != NULL)
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xucd.entry_is_conf = true;
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rv = xbps_entry_install_conf_file(xhp,
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binpkg_filesd, pkg_filesd, entry,
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entry_pname, pkgver, S_ISLNK(st.st_mode));
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if (rv == -1) {
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/* error */
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goto out;
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} else if (rv == 0) {
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/*
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* Keep curfile as is.
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*/
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skip_extract = true;
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}
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rv = 0;
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} else {
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rv = xbps_file_hash_check_dictionary(
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xhp, binpkg_filesd, "files", buf);
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if (rv == -1) {
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/* error */
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xbps_dbg_printf(xhp,
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"%s: failed to check"
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" hash for `%s': %s\n",
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pkgver, entry_pname,
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strerror(errno));
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goto out;
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} else if (rv == 0) {
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/*
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* hash match, skip extraction.
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*/
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xbps_dbg_printf(xhp,
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"%s: file %s "
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"matches existing SHA256, "
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"skipping...\n",
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pkgver, entry_pname);
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skip_extract = true;
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}
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rv = 0;
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}
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}
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}
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/*
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* Check if current uid/gid differs from file in binpkg,
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* and change permissions if true.
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*/
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if ((!force && file_exists && skip_extract && (euid == 0)) &&
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(((archive_entry_uid(entry) != st.st_uid)) ||
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((archive_entry_gid(entry) != st.st_gid)))) {
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if (lchown(entry_pname,
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archive_entry_uid(entry),
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archive_entry_gid(entry)) != 0) {
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xbps_dbg_printf(xhp,
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"%s: failed "
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"to set uid/gid to %"PRIu64":%"PRIu64" (%s)\n",
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pkgver, archive_entry_uid(entry),
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archive_entry_gid(entry),
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strerror(errno));
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} else {
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xbps_dbg_printf(xhp, "%s: entry %s changed "
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"uid/gid to %"PRIu64":%"PRIu64".\n", pkgver, entry_pname,
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archive_entry_uid(entry),
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archive_entry_gid(entry));
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}
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}
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/*
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* Check if current file mode differs from file mode
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* in binpkg and apply perms if true.
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*/
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if (!force && file_exists && skip_extract &&
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(archive_entry_mode(entry) != st.st_mode)) {
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if (chmod(entry_pname,
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archive_entry_mode(entry)) != 0) {
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xbps_dbg_printf(xhp,
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"%s: failed "
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"to set perms %s to %s: %s\n",
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pkgver, archive_entry_strmode(entry),
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entry_pname,
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strerror(errno));
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rv = EINVAL;
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goto out;
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}
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xbps_dbg_printf(xhp, "%s: entry %s changed file "
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"mode to %s.\n", pkgver, entry_pname,
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archive_entry_strmode(entry));
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}
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/*
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* Check if current file mtime differs from archive entry
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* in binpkg and apply mtime if true.
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*/
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if (!force && file_exists && skip_extract &&
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(archive_entry_mtime_nsec(entry) != st.st_mtime)) {
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struct timespec ts[2];
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ts[0].tv_sec = archive_entry_atime(entry);
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ts[0].tv_nsec = archive_entry_atime_nsec(entry);
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ts[1].tv_sec = archive_entry_mtime(entry);
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ts[1].tv_nsec = archive_entry_mtime_nsec(entry);
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if (utimensat(AT_FDCWD, entry_pname, ts,
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AT_SYMLINK_NOFOLLOW) == -1) {
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xbps_dbg_printf(xhp,
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"%s: failed "
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"to set mtime %lu to %s: %s\n",
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pkgver, archive_entry_mtime_nsec(entry),
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entry_pname,
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strerror(errno));
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rv = EINVAL;
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goto out;
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}
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xbps_dbg_printf(xhp, "%s: updated file timestamps to %s\n",
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pkgver, entry_pname);
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}
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if (!force && skip_extract) {
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archive_read_data_skip(ar);
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continue;
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}
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/*
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* Reset entry_pname again because if entry's pathname
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* has been changed it will become a dangling pointer.
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*/
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entry_pname = archive_entry_pathname(entry);
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/*
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* Extract entry from archive.
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*/
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if (archive_read_extract(ar, entry, flags) != 0) {
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error = archive_errno(ar);
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
error, pkgver,
|
|
"%s: [unpack] failed to extract file `%s': %s",
|
|
pkgver, entry_pname, strerror(error));
|
|
break;
|
|
} else {
|
|
if (xhp->unpack_cb != NULL) {
|
|
xucd.entry = entry_pname;
|
|
xucd.entry_extract_count++;
|
|
(*xhp->unpack_cb)(&xucd, xhp->unpack_cb_data);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* If there was any error extracting files from archive, error out.
|
|
*/
|
|
if (error || ar_rv == ARCHIVE_FATAL) {
|
|
rv = error;
|
|
if (!rv)
|
|
rv = ar_rv;
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, rv, pkgver,
|
|
"%s: [unpack] failed to extract files: %s",
|
|
pkgver, strerror(rv));
|
|
goto out;
|
|
}
|
|
/*
|
|
* Externalize binpkg files.plist to disk, if not empty.
|
|
*/
|
|
if (xbps_dictionary_count(binpkg_filesd)) {
|
|
mode_t prev_umask;
|
|
prev_umask = umask(022);
|
|
buf = xbps_xasprintf("%s/.%s-files.plist", xhp->metadir, pkgname);
|
|
if (!xbps_dictionary_externalize_to_file(binpkg_filesd, buf)) {
|
|
rv = errno;
|
|
umask(prev_umask);
|
|
free(buf);
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver, "%s: [unpack] failed to externalize pkg "
|
|
"pkg metadata files: %s", pkgver, strerror(rv));
|
|
goto out;
|
|
}
|
|
umask(prev_umask);
|
|
free(buf);
|
|
}
|
|
out:
|
|
/*
|
|
* If unpacked pkg has no files, remove its files metadata plist.
|
|
*/
|
|
if (!xbps_dictionary_count(binpkg_filesd)) {
|
|
buf = xbps_xasprintf("%s/.%s-files.plist", xhp->metadir, pkgname);
|
|
unlink(buf);
|
|
free(buf);
|
|
}
|
|
if (xbps_object_type(binpkg_propsd) == XBPS_TYPE_DICTIONARY)
|
|
xbps_object_release(binpkg_propsd);
|
|
if (xbps_object_type(binpkg_filesd) == XBPS_TYPE_DICTIONARY)
|
|
xbps_object_release(binpkg_filesd);
|
|
if (pkgname != NULL)
|
|
free(pkgname);
|
|
if (instbuf != NULL)
|
|
free(instbuf);
|
|
if (rembuf != NULL)
|
|
free(rembuf);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int HIDDEN
|
|
xbps_unpack_binary_pkg(struct xbps_handle *xhp, xbps_dictionary_t pkg_repod)
|
|
{
|
|
struct archive *ar = NULL;
|
|
struct stat st;
|
|
const char *pkgver;
|
|
char *bpkg = NULL;
|
|
int pkg_fd = -1, rv = 0;
|
|
mode_t myumask;
|
|
|
|
assert(xbps_object_type(pkg_repod) == XBPS_TYPE_DICTIONARY);
|
|
|
|
xbps_dictionary_get_cstring_nocopy(pkg_repod, "pkgver", &pkgver);
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK, 0, pkgver, NULL);
|
|
|
|
bpkg = xbps_repository_pkg_path(xhp, pkg_repod);
|
|
if (bpkg == NULL) {
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
errno, pkgver,
|
|
"%s: [unpack] cannot determine binary package "
|
|
"file for `%s': %s", pkgver, bpkg, strerror(errno));
|
|
return errno;
|
|
}
|
|
|
|
if ((ar = archive_read_new()) == NULL) {
|
|
free(bpkg);
|
|
return ENOMEM;
|
|
}
|
|
/*
|
|
* Enable support for tar format and some compression methods.
|
|
*/
|
|
archive_read_support_filter_gzip(ar);
|
|
archive_read_support_filter_bzip2(ar);
|
|
archive_read_support_filter_xz(ar);
|
|
archive_read_support_filter_lz4(ar);
|
|
archive_read_support_filter_zstd(ar);
|
|
archive_read_support_format_tar(ar);
|
|
|
|
myumask = umask(022);
|
|
|
|
pkg_fd = open(bpkg, O_RDONLY|O_CLOEXEC);
|
|
if (pkg_fd == -1) {
|
|
rv = errno;
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver,
|
|
"%s: [unpack] failed to open binary package `%s': %s",
|
|
pkgver, bpkg, strerror(rv));
|
|
goto out;
|
|
}
|
|
if (fstat(pkg_fd, &st) == -1) {
|
|
rv = errno;
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver,
|
|
"%s: [unpack] failed to fstat binary package `%s': %s",
|
|
pkgver, bpkg, strerror(rv));
|
|
goto out;
|
|
}
|
|
if (archive_read_open_fd(ar, pkg_fd, st.st_blksize) == ARCHIVE_FATAL) {
|
|
rv = archive_errno(ar);
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver,
|
|
"%s: [unpack] failed to read binary package `%s': %s",
|
|
pkgver, bpkg, strerror(rv));
|
|
goto out;
|
|
}
|
|
/*
|
|
* Externalize pkg files dictionary to metadir.
|
|
*/
|
|
if (access(xhp->metadir, R_OK|X_OK) == -1) {
|
|
rv = errno;
|
|
if (rv != ENOENT)
|
|
goto out;
|
|
|
|
if (xbps_mkpath(xhp->metadir, 0755) == -1) {
|
|
rv = errno;
|
|
goto out;
|
|
}
|
|
}
|
|
/*
|
|
* Extract archive files.
|
|
*/
|
|
if ((rv = unpack_archive(xhp, pkg_repod, pkgver, bpkg, ar)) != 0) {
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL, rv, pkgver,
|
|
"%s: [unpack] failed to unpack files from archive: %s",
|
|
pkgver, strerror(rv));
|
|
goto out;
|
|
}
|
|
/*
|
|
* Set package state to unpacked.
|
|
*/
|
|
if ((rv = xbps_set_pkg_state_dictionary(pkg_repod,
|
|
XBPS_PKG_STATE_UNPACKED)) != 0) {
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver,
|
|
"%s: [unpack] failed to set state to unpacked: %s",
|
|
pkgver, strerror(rv));
|
|
}
|
|
/* register alternatives */
|
|
if ((rv = xbps_alternatives_register(xhp, pkg_repod)) != 0) {
|
|
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
|
|
rv, pkgver,
|
|
"%s: [unpack] failed to register alternatives: %s",
|
|
pkgver, strerror(rv));
|
|
}
|
|
|
|
out:
|
|
if (pkg_fd != -1)
|
|
close(pkg_fd);
|
|
if (ar)
|
|
archive_read_finish(ar);
|
|
if (bpkg)
|
|
free(bpkg);
|
|
|
|
/* restore */
|
|
umask(myumask);
|
|
|
|
return rv;
|
|
}
|