c0b280c118
Some changes were made to the API when making the documentation: - A few exported functions are now hidden, because they were only used internally in the library. - A few exported symbols were renamed to document them better than previously. - Cosmetic changes all along the way, as well as some fixes here and there. --HG-- extra : convert_revision : xtraeme%40gmail.com-20100121021019-onbsivlrhdb7t3ou
383 lines
9.6 KiB
C
383 lines
9.6 KiB
C
/*-
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* Copyright (c) 2008-2010 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 <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 <xbps_api.h>
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/**
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* @file lib/unpack.c
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* @brief Binary package file unpacking routines
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* @defgroup unpack Binary package file unpacking functions
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*/
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static void
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set_extract_flags(int *flags)
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{
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*flags = 0;
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if (getuid() == 0)
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*flags = FEXTRACT_FLAGS;
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else
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*flags = EXTRACT_FLAGS;
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}
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/*
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* TODO: remove printfs and return appropiate errors to be interpreted by
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* the consumer.
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*/
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static int
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unpack_archive_fini(struct archive *ar, prop_dictionary_t pkg)
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{
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prop_dictionary_t filesd = NULL, old_filesd = NULL;
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struct archive_entry *entry;
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size_t entry_idx = 0;
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const char *pkgname, *version, *rootdir, *entry_str;
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char *buf, *buf2;
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int rv = 0, flags, lflags;
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bool essential, preserve, actgt, skip_entry, update;
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bool props_plist_found, files_plist_found;
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assert(ar != NULL);
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assert(pkg != NULL);
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essential = preserve = actgt = skip_entry = update = false;
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props_plist_found = files_plist_found = false;
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rootdir = xbps_get_rootdir();
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flags = xbps_get_flags();
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if (strcmp(rootdir, "") == 0)
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rootdir = "/";
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if (chdir(rootdir) == -1)
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return errno;
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if (!prop_dictionary_get_cstring_nocopy(pkg, "pkgname", &pkgname))
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return errno;
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if (!prop_dictionary_get_cstring_nocopy(pkg, "version", &version))
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return errno;
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/*
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* The following two objects are OPTIONAL.
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*/
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prop_dictionary_get_bool(pkg, "essential", &essential);
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prop_dictionary_get_bool(pkg, "preserve", &preserve);
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if (xbps_check_is_installed_pkgname(pkgname))
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update = true;
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/*
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* Process the archive files.
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*/
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while (archive_read_next_header(ar, &entry) == ARCHIVE_OK) {
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if (entry_idx >= 5) {
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/*
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* If we have processed 6 entries and the two
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* required metadata files weren't found, bail out.
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* This is not an XBPS binary package.
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*/
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if (!props_plist_found && !files_plist_found)
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return ENOPKG;
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}
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entry_str = archive_entry_pathname(entry);
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set_extract_flags(&lflags);
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/*
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* While updating, always remove current INSTALL/REMOVE
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* scripts, because a package upgrade might not have those
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* anymore.
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*/
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if (update) {
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buf = xbps_xasprintf(".%s/metadata/%s/INSTALL",
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XBPS_META_PATH, pkgname);
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if (buf == NULL)
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return errno;
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if (access(buf, R_OK|X_OK) == 0) {
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if (unlink(buf) == -1) {
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free(buf);
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return errno;
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}
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}
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free(buf);
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buf = NULL;
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buf = xbps_xasprintf(".%s/metadata/%s/REMOVE",
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XBPS_META_PATH, pkgname);
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if (buf == NULL)
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return errno;
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if (access(buf, R_OK|X_OK) == 0) {
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if (unlink(buf) == -1) {
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free(buf);
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return errno;
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}
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}
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free(buf);
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buf = NULL;
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}
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/*
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* Now check what currenty entry in the archive contains.
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*/
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if (((strcmp("./INSTALL", entry_str)) == 0) ||
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((strcmp("./REMOVE", entry_str)) == 0) ||
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((strcmp("./files.plist", entry_str)) == 0) ||
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((strcmp("./props.plist", entry_str)) == 0) || essential) {
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/*
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* Always overwrite files in essential packages,
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* and metadata files.
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*/
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lflags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE;
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lflags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
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}
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/*
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* Run the pre INSTALL action if the file is there.
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*/
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if (strcmp("./INSTALL", entry_str) == 0) {
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buf = xbps_xasprintf(".%s/metadata/%s/INSTALL",
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XBPS_META_PATH, pkgname);
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if (buf == NULL)
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return errno;
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actgt = true;
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archive_entry_set_pathname(entry, buf);
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archive_entry_set_mode(entry, 0750);
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if (archive_read_extract(ar, entry, lflags) != 0) {
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if ((rv = archive_errno(ar)) != EEXIST) {
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free(buf);
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return rv;
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}
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}
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if ((rv = xbps_file_chdir_exec(rootdir, buf, "pre",
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pkgname, version, update ? "yes" : "no",
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NULL)) != 0) {
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free(buf);
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fprintf(stderr,
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"%s: preinst action target error %s\n",
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pkgname, strerror(errno));
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return rv;
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}
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/* pass to the next entry if successful */
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free(buf);
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entry_idx++;
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continue;
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/*
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* Unpack metadata files in final directory.
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*/
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} else if (strcmp("./REMOVE", entry_str) == 0) {
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buf2 = xbps_xasprintf(".%s/metadata/%s/REMOVE",
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XBPS_META_PATH, pkgname);
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if (buf2 == NULL)
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return errno;
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archive_entry_set_pathname(entry, buf2);
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archive_entry_set_mode(entry, 0750);
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free(buf2);
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buf2 = NULL;
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} else if (strcmp("./files.plist", entry_str) == 0) {
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/*
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* Now we have a dictionary from the entry
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* in memory. Will be written to disk later, when
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* all files are extracted.
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*/
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filesd = xbps_read_dict_from_archive_entry(ar, entry);
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if (filesd == NULL)
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return errno;
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/* Pass to next entry */
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files_plist_found = true;
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entry_idx++;
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continue;
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} else if (strcmp("./props.plist", entry_str) == 0) {
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buf2 = xbps_xasprintf(".%s/metadata/%s/props.plist",
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XBPS_META_PATH, pkgname);
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if (buf2 == NULL)
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return errno;
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archive_entry_set_pathname(entry, buf2);
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free(buf2);
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props_plist_found = true;
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} else {
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/*
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* Handle configuration files.
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*/
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if ((rv = xbps_config_file_from_archive_entry(filesd,
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entry, pkgname, &lflags, &skip_entry)) != 0) {
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prop_object_release(filesd);
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return rv;
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}
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if (skip_entry) {
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archive_read_data_skip(ar);
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skip_entry = false;
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entry_idx++;
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continue;
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}
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}
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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, lflags) != 0) {
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rv = archive_errno(ar);
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if (rv != EEXIST) {
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fprintf(stderr, "ERROR: %s...exiting!\n",
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archive_error_string(ar));
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return rv;;
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} else if (rv == EEXIST) {
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if (flags & XBPS_FLAG_VERBOSE) {
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fprintf(stderr,
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"WARNING: ignoring existent "
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"path: %s\n",
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archive_entry_pathname(entry));
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}
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rv = 0;
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entry_idx++;
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continue;
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}
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}
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entry_idx++;
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if (flags & XBPS_FLAG_VERBOSE)
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printf(" %s\n", archive_entry_pathname(entry));
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}
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if ((rv = archive_errno(ar)) == 0) {
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buf2 = xbps_xasprintf(".%s/metadata/%s/files.plist",
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XBPS_META_PATH, pkgname);
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if (buf2 == NULL) {
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prop_object_release(filesd);
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return errno;
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}
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/*
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* Check if files.plist exists and pkg is marked as
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* essential and NOT preserve, in that case we need to check
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* for obsolete files and remove them if necessary.
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*/
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if (!preserve && essential && (access(buf2, R_OK) == 0)) {
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old_filesd =
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prop_dictionary_internalize_from_file(buf2);
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if (old_filesd == NULL) {
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prop_object_release(filesd);
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free(buf2);
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return errno;
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}
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rv = xbps_remove_obsoletes(old_filesd, filesd);
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if (rv != 0) {
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prop_object_release(old_filesd);
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prop_object_release(filesd);
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free(buf2);
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return rv;
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}
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prop_object_release(old_filesd);
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}
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/*
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* Now that all files were successfully unpacked, we
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* can safely externalize files.plist because the path
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* is reachable.
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*/
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if (!prop_dictionary_externalize_to_file(filesd, buf2)) {
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prop_object_release(filesd);
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free(buf2);
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return errno;
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}
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free(buf2);
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}
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if (filesd)
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prop_object_release(filesd);
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return rv;
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}
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int
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xbps_unpack_binary_pkg(prop_dictionary_t pkg)
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{
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const char *pkgname, *repoloc;
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struct archive *ar = NULL;
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char *binfile = NULL;
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int pkg_fd, rv = 0;
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assert(pkg != NULL);
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if (!prop_dictionary_get_cstring_nocopy(pkg, "pkgname", &pkgname))
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return errno;
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if (!prop_dictionary_get_cstring_nocopy(pkg, "repository", &repoloc))
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return errno;
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binfile = xbps_get_binpkg_local_path(pkg, repoloc);
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if (binfile == NULL)
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return EINVAL;
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if ((pkg_fd = open(binfile, O_RDONLY)) == -1) {
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rv = errno;
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goto out;
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}
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ar = archive_read_new();
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if (ar == NULL) {
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rv = errno;
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goto out;
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}
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/*
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* Enable support for tar format and all compression methods.
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*/
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archive_read_support_compression_all(ar);
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archive_read_support_format_tar(ar);
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if ((rv = archive_read_open_fd(ar, pkg_fd,
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ARCHIVE_READ_BLOCKSIZE)) != 0)
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goto out;
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if ((rv = unpack_archive_fini(ar, pkg)) == 0) {
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/*
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* If installation of package was successful, make sure
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* its files are written in storage (if possible).
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*/
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if (fsync(pkg_fd) == -1) {
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rv = errno;
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goto out;
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}
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/*
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* Set package state to unpacked.
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*/
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rv = xbps_set_pkg_state_installed(pkgname,
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XBPS_PKG_STATE_UNPACKED);
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}
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out:
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if (ar)
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archive_read_finish(ar);
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if (pkg_fd != -1)
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(void)close(pkg_fd);
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if (binfile)
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free(binfile);
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return rv;
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}
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