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-rw-r--r--lib/libalpm/be_package.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/lib/libalpm/be_package.c b/lib/libalpm/be_package.c
new file mode 100644
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--- /dev/null
+++ b/lib/libalpm/be_package.c
@@ -0,0 +1,283 @@
+/*
+ * be_package.c
+ *
+ * Copyright (c) 2002-2008 by Judd Vinet <jvinet@zeroflux.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <ctype.h>
+#include <locale.h> /* setlocale */
+
+/* libarchive */
+#include <archive.h>
+#include <archive_entry.h>
+
+/* libalpm */
+#include "alpm_list.h"
+#include "util.h"
+#include "log.h"
+#include "error.h"
+#include "package.h"
+#include "deps.h" /* _alpm_splitdep */
+
+/**
+ * Parses the package description file for a package into a pmpkg_t struct.
+ * @param archive the archive to read from, pointed at the .PKGINFO entry
+ * @param newpkg an empty pmpkg_t struct to fill with package info
+ *
+ * @return 0 on success, 1 on error
+ */
+static int parse_descfile(struct archive *a, pmpkg_t *newpkg)
+{
+ char line[PATH_MAX];
+ char *ptr = NULL;
+ char *key = NULL;
+ int linenum = 0;
+
+ ALPM_LOG_FUNC;
+
+ /* loop until we reach EOF (where archive_fgets will return NULL) */
+ while(_alpm_archive_fgets(line, PATH_MAX, a) != NULL) {
+ linenum++;
+ _alpm_strtrim(line);
+ if(strlen(line) == 0 || line[0] == '#') {
+ continue;
+ }
+ ptr = line;
+ key = strsep(&ptr, "=");
+ if(key == NULL || ptr == NULL) {
+ _alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d\n",
+ newpkg->name ? newpkg->name : "error", linenum);
+ } else {
+ key = _alpm_strtrim(key);
+ ptr = _alpm_strtrim(ptr);
+ if(!strcmp(key, "pkgname")) {
+ STRDUP(newpkg->name, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "pkgver")) {
+ STRDUP(newpkg->version, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "pkgdesc")) {
+ STRDUP(newpkg->desc, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "group")) {
+ newpkg->groups = alpm_list_add(newpkg->groups, strdup(ptr));
+ } else if(!strcmp(key, "url")) {
+ STRDUP(newpkg->url, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "license")) {
+ newpkg->licenses = alpm_list_add(newpkg->licenses, strdup(ptr));
+ } else if(!strcmp(key, "builddate")) {
+ char first = tolower(ptr[0]);
+ if(first > 'a' && first < 'z') {
+ struct tm tmp_tm = {0}; //initialize to null in case of failure
+ setlocale(LC_TIME, "C");
+ strptime(ptr, "%a %b %e %H:%M:%S %Y", &tmp_tm);
+ newpkg->builddate = mktime(&tmp_tm);
+ setlocale(LC_TIME, "");
+ } else {
+ newpkg->builddate = atol(ptr);
+ }
+ } else if(!strcmp(key, "packager")) {
+ STRDUP(newpkg->packager, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "arch")) {
+ STRDUP(newpkg->arch, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "size")) {
+ /* size in the raw package is uncompressed (installed) size */
+ newpkg->isize = atol(ptr);
+ } else if(!strcmp(key, "depend")) {
+ pmdepend_t *dep = _alpm_splitdep(ptr);
+ newpkg->depends = alpm_list_add(newpkg->depends, dep);
+ } else if(!strcmp(key, "optdepend")) {
+ newpkg->optdepends = alpm_list_add(newpkg->optdepends, strdup(ptr));
+ } else if(!strcmp(key, "conflict")) {
+ newpkg->conflicts = alpm_list_add(newpkg->conflicts, strdup(ptr));
+ } else if(!strcmp(key, "replaces")) {
+ newpkg->replaces = alpm_list_add(newpkg->replaces, strdup(ptr));
+ } else if(!strcmp(key, "provides")) {
+ newpkg->provides = alpm_list_add(newpkg->provides, strdup(ptr));
+ } else if(!strcmp(key, "backup")) {
+ newpkg->backup = alpm_list_add(newpkg->backup, strdup(ptr));
+ } else {
+ _alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d\n",
+ newpkg->name ? newpkg->name : "error", linenum);
+ }
+ }
+ line[0] = '\0';
+ }
+
+ return(0);
+}
+
+/**
+ * Load a package and create the corresponding pmpkg_t struct.
+ * @param pkgfile path to the package file
+ * @param full whether to stop the load after metadata is read or continue
+ * through the full archive
+ * @return An information filled pmpkg_t struct
+ */
+static pmpkg_t *pkg_load(const char *pkgfile, unsigned short full)
+{
+ int ret = ARCHIVE_OK;
+ int config = 0;
+ struct archive *archive;
+ struct archive_entry *entry;
+ pmpkg_t *newpkg = NULL;
+ struct stat st;
+
+ ALPM_LOG_FUNC;
+
+ if(pkgfile == NULL || strlen(pkgfile) == 0) {
+ RET_ERR(PM_ERR_WRONG_ARGS, NULL);
+ }
+
+ if((archive = archive_read_new()) == NULL) {
+ RET_ERR(PM_ERR_LIBARCHIVE, NULL);
+ }
+
+ archive_read_support_compression_all(archive);
+ archive_read_support_format_all(archive);
+
+ if (archive_read_open_filename(archive, pkgfile,
+ ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
+ RET_ERR(PM_ERR_PKG_OPEN, NULL);
+ }
+
+ newpkg = _alpm_pkg_new(NULL, NULL);
+ if(newpkg == NULL) {
+ archive_read_finish(archive);
+ RET_ERR(PM_ERR_MEMORY, NULL);
+ }
+
+ if(stat(pkgfile, &st) == 0) {
+ newpkg->size = st.st_size;
+ }
+
+ /* If full is false, only read through the archive until we find our needed
+ * metadata. If it is true, read through the entire archive, which serves
+ * as a verfication of integrity and allows us to create the filelist. */
+ while((ret = archive_read_next_header(archive, &entry)) == ARCHIVE_OK) {
+ const char *entry_name = archive_entry_pathname(entry);
+
+ if(strcmp(entry_name, ".PKGINFO") == 0) {
+ /* parse the info file */
+ if(parse_descfile(archive, newpkg) != 0) {
+ _alpm_log(PM_LOG_ERROR, _("could not parse package description file in %s\n"),
+ pkgfile);
+ goto pkg_invalid;
+ }
+ if(newpkg->name == NULL || strlen(newpkg->name) == 0) {
+ _alpm_log(PM_LOG_ERROR, _("missing package name in %s\n"), pkgfile);
+ goto pkg_invalid;
+ }
+ if(newpkg->version == NULL || strlen(newpkg->version) == 0) {
+ _alpm_log(PM_LOG_ERROR, _("missing package version in %s\n"), pkgfile);
+ goto pkg_invalid;
+ }
+ config = 1;
+ continue;
+ } else if(strcmp(entry_name, ".INSTALL") == 0) {
+ newpkg->scriptlet = 1;
+ } else if(*entry_name == '.') {
+ /* for now, ignore all files starting with '.' that haven't
+ * already been handled (for future possibilities) */
+ } else {
+ /* Keep track of all files for filelist generation */
+ newpkg->files = alpm_list_add(newpkg->files, strdup(entry_name));
+ }
+
+ if(archive_read_data_skip(archive)) {
+ _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s\n"),
+ pkgfile, archive_error_string(archive));
+ pm_errno = PM_ERR_LIBARCHIVE;
+ goto error;
+ }
+
+ /* if we are not doing a full read, see if we have all we need */
+ if(!full && config) {
+ break;
+ }
+ }
+
+ if(ret != ARCHIVE_EOF && ret != ARCHIVE_OK) { /* An error occured */
+ _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s\n"),
+ pkgfile, archive_error_string(archive));
+ pm_errno = PM_ERR_LIBARCHIVE;
+ goto error;
+ }
+
+ if(!config) {
+ _alpm_log(PM_LOG_ERROR, _("missing package metadata in %s\n"), pkgfile);
+ goto pkg_invalid;
+ }
+
+ archive_read_finish(archive);
+
+ /* internal fields for package struct */
+ newpkg->origin = PKG_FROM_FILE;
+ newpkg->origin_data.file = strdup(pkgfile);
+
+ if(full) {
+ /* "checking for conflicts" requires a sorted list, ensure that here */
+ _alpm_log(PM_LOG_DEBUG, "sorting package filelist for %s\n", pkgfile);
+ newpkg->files = alpm_list_msort(newpkg->files, alpm_list_count(newpkg->files),
+ _alpm_str_cmp);
+ newpkg->infolevel = INFRQ_ALL;
+ } else {
+ /* get rid of any partial filelist we may have collected, it is invalid */
+ FREELIST(newpkg->files);
+ newpkg->infolevel = INFRQ_BASE | INFRQ_DESC | INFRQ_DEPENDS;
+ }
+
+ return(newpkg);
+
+pkg_invalid:
+ pm_errno = PM_ERR_PKG_INVALID;
+error:
+ _alpm_pkg_free(newpkg);
+ archive_read_finish(archive);
+
+ return(NULL);
+}
+
+/** Create a package from a file.
+ * @param filename location of the package tarball
+ * @param full whether to stop the load after metadata is read or continue
+ * through the full archive
+ * @param pkg address of the package pointer
+ * @return 0 on success, -1 on error (pm_errno is set accordingly)
+ */
+int SYMEXPORT alpm_pkg_load(const char *filename, unsigned short full,
+ pmpkg_t **pkg)
+{
+ ALPM_LOG_FUNC;
+
+ /* Sanity checks */
+ ASSERT(filename != NULL && strlen(filename) != 0,
+ RET_ERR(PM_ERR_WRONG_ARGS, -1));
+ ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
+
+ *pkg = pkg_load(filename, full);
+ if(*pkg == NULL) {
+ /* pm_errno is set by pkg_load */
+ return(-1);
+ }
+
+ return(0);
+}
+
+/* vim: set ts=2 sw=2 noet: */

Copyright © 2002-2022 Judd Vinet and Aaron Griffin. Copyright © 2022 Erich Eckner.
The Arch Linux name and logo are recognized trademarks. Some rights reserved. The registered trademark Linux® is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis.