Merge remote branch 'allan/backend'

1 files changed, 967 insertions, 0 deletions

diff --git a/lib/libalpm/be_local.c b/lib/libalpm/be_local.c
new file mode 100644
index 00000000..cd6fac40
--- /dev/null
+++ b/lib/libalpm/be_local.c
@@ -0,0 +1,967 @@
+/*
+ *  be_local.c
+ *
+ *  Copyright (c) 2006-2010 Pacman Development Team <pacman-dev@archlinux.org>
+ *  Copyright (c) 2002-2006 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 <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <stdint.h> /* intmax_t */
+#include <sys/stat.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <time.h>
+#include <limits.h> /* PATH_MAX */
+#include <locale.h> /* setlocale */
+
+/* libarchive */
+#include <archive.h>
+#include <archive_entry.h>
+
+/* libalpm */
+#include "db.h"
+#include "alpm_list.h"
+#include "log.h"
+#include "util.h"
+#include "alpm.h"
+#include "handle.h"
+#include "package.h"
+#include "group.h"
+#include "delta.h"
+#include "deps.h"
+#include "dload.h"
+
+
+#define LAZY_LOAD(info, errret) \
+	do { \
+		ALPM_LOG_FUNC; \
+		ASSERT(handle != NULL, return(errret)); \
+		ASSERT(pkg != NULL, return(errret)); \
+		if(pkg->origin != PKG_FROM_FILE && !(pkg->infolevel & info)) { \
+			_alpm_local_db_read(pkg->origin_data.db, pkg, info); \
+		} \
+	} while(0)
+
+
+/* Cache-specific accessor functions. These implementations allow for lazy
+ * loading by the files backend when a data member is actually needed
+ * rather than loading all pieces of information when the package is first
+ * initialized.
+ */
+
+const char *_cache_get_filename(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->filename;
+}
+
+const char *_cache_get_name(pmpkg_t *pkg)
+{
+	ASSERT(pkg != NULL, return(NULL));
+	return pkg->name;
+}
+
+static const char *_cache_get_version(pmpkg_t *pkg)
+{
+	ASSERT(pkg != NULL, return(NULL));
+	return pkg->version;
+}
+
+static const char *_cache_get_desc(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->desc;
+}
+
+const char *_cache_get_url(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->url;
+}
+
+time_t _cache_get_builddate(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, 0);
+	return pkg->builddate;
+}
+
+time_t _cache_get_installdate(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, 0);
+	return pkg->installdate;
+}
+
+const char *_cache_get_packager(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->packager;
+}
+
+const char *_cache_get_md5sum(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->md5sum;
+}
+
+const char *_cache_get_arch(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->arch;
+}
+
+off_t _cache_get_size(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, -1);
+	return pkg->size;
+}
+
+off_t _cache_get_isize(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, -1);
+	return pkg->isize;
+}
+
+pmpkgreason_t _cache_get_reason(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, -1);
+	return pkg->reason;
+}
+
+alpm_list_t *_cache_get_licenses(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->licenses;
+}
+
+alpm_list_t *_cache_get_groups(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->groups;
+}
+
+int _cache_has_force(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, -1);
+	return pkg->force;
+}
+
+alpm_list_t *_cache_get_depends(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DEPENDS, NULL);
+	return pkg->depends;
+}
+
+alpm_list_t *_cache_get_optdepends(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DEPENDS, NULL);
+	return pkg->optdepends;
+}
+
+alpm_list_t *_cache_get_conflicts(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DEPENDS, NULL);
+	return pkg->conflicts;
+}
+
+alpm_list_t *_cache_get_provides(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DEPENDS, NULL);
+	return pkg->provides;
+}
+
+alpm_list_t *_cache_get_replaces(pmpkg_t *pkg)
+{
+	LAZY_LOAD(INFRQ_DESC, NULL);
+	return pkg->replaces;
+}
+
+alpm_list_t *_cache_get_deltas(pmpkg_t *pkg)
+{
+	ASSERT(pkg != NULL, return(NULL));
+	/* local pkgs do not have deltas so nothing to load */
+	return pkg->deltas;
+}
+
+alpm_list_t *_cache_get_files(pmpkg_t *pkg)
+{
+	ALPM_LOG_FUNC;
+
+	/* Sanity checks */
+	ASSERT(handle != NULL, return(NULL));
+	ASSERT(pkg != NULL, return(NULL));
+
+	if(pkg->origin == PKG_FROM_LOCALDB
+		 && !(pkg->infolevel & INFRQ_FILES)) {
+		_alpm_local_db_read(pkg->origin_data.db, pkg, INFRQ_FILES);
+	}
+	return pkg->files;
+}
+
+alpm_list_t *_cache_get_backup(pmpkg_t *pkg)
+{
+	ALPM_LOG_FUNC;
+
+	/* Sanity checks */
+	ASSERT(handle != NULL, return(NULL));
+	ASSERT(pkg != NULL, return(NULL));
+
+	if(pkg->origin == PKG_FROM_LOCALDB
+		 && !(pkg->infolevel & INFRQ_FILES)) {
+		_alpm_local_db_read(pkg->origin_data.db, pkg, INFRQ_FILES);
+	}
+	return pkg->backup;
+}
+
+/**
+ * Open a package changelog for reading. Similar to fopen in functionality,
+ * except that the returned 'file stream' is from the database.
+ * @param pkg the package (from db) to read the changelog
+ * @return a 'file stream' to the package changelog
+ */
+void *_cache_changelog_open(pmpkg_t *pkg)
+{
+	ALPM_LOG_FUNC;
+
+	/* Sanity checks */
+	ASSERT(handle != NULL, return(NULL));
+	ASSERT(pkg != NULL, return(NULL));
+
+	char clfile[PATH_MAX];
+	snprintf(clfile, PATH_MAX, "%s/%s/%s-%s/changelog",
+			alpm_option_get_dbpath(),
+			alpm_db_get_name(alpm_pkg_get_db(pkg)),
+			alpm_pkg_get_name(pkg),
+			alpm_pkg_get_version(pkg));
+	return fopen(clfile, "r");
+}
+
+/**
+ * Read data from an open changelog 'file stream'. Similar to fread in
+ * functionality, this function takes a buffer and amount of data to read.
+ * @param ptr a buffer to fill with raw changelog data
+ * @param size the size of the buffer
+ * @param pkg the package that the changelog is being read from
+ * @param fp a 'file stream' to the package changelog
+ * @return the number of characters read, or 0 if there is no more data
+ */
+size_t _cache_changelog_read(void *ptr, size_t size,
+		const pmpkg_t *pkg, const void *fp)
+{
+	return ( fread(ptr, 1, size, (FILE*)fp) );
+}
+
+/*
+int _cache_changelog_feof(const pmpkg_t *pkg, void *fp)
+{
+	return( feof((FILE*)fp) );
+}
+*/
+
+/**
+ * Close a package changelog for reading. Similar to fclose in functionality,
+ * except that the 'file stream' is from the database.
+ * @param pkg the package that the changelog was read from
+ * @param fp a 'file stream' to the package changelog
+ * @return whether closing the package changelog stream was successful
+ */
+int _cache_changelog_close(const pmpkg_t *pkg, void *fp)
+{
+	return( fclose((FILE*)fp) );
+}
+
+/** The local database operations struct. Get package fields through
+ * lazy accessor methods that handle any backend loading and caching
+ * logic.
+ */
+static struct pkg_operations local_pkg_ops = {
+	.get_filename    = _cache_get_filename,
+	.get_name        = _cache_get_name,
+	.get_version     = _cache_get_version,
+	.get_desc        = _cache_get_desc,
+	.get_url         = _cache_get_url,
+	.get_builddate   = _cache_get_builddate,
+	.get_installdate = _cache_get_installdate,
+	.get_packager    = _cache_get_packager,
+	.get_md5sum      = _cache_get_md5sum,
+	.get_arch        = _cache_get_arch,
+	.get_size        = _cache_get_size,
+	.get_isize       = _cache_get_isize,
+	.get_reason      = _cache_get_reason,
+	.has_force       = _cache_has_force,
+	.get_licenses    = _cache_get_licenses,
+	.get_groups      = _cache_get_groups,
+	.get_depends     = _cache_get_depends,
+	.get_optdepends  = _cache_get_optdepends,
+	.get_conflicts   = _cache_get_conflicts,
+	.get_provides    = _cache_get_provides,
+	.get_replaces    = _cache_get_replaces,
+	.get_deltas      = _cache_get_deltas,
+	.get_files       = _cache_get_files,
+	.get_backup      = _cache_get_backup,
+
+	.changelog_open  = _cache_changelog_open,
+	.changelog_read  = _cache_changelog_read,
+	.changelog_close = _cache_changelog_close,
+};
+
+static int checkdbdir(pmdb_t *db)
+{
+	struct stat buf;
+	const char *path = _alpm_db_path(db);
+
+	if(stat(path, &buf) != 0) {
+		_alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
+				path);
+		if(_alpm_makepath(path) != 0) {
+			RET_ERR(PM_ERR_SYSTEM, -1);
+		}
+	} else if(!S_ISDIR(buf.st_mode)) {
+		_alpm_log(PM_LOG_WARNING, _("removing invalid database: %s\n"), path);
+		if(unlink(path) != 0 || _alpm_makepath(path) != 0) {
+			RET_ERR(PM_ERR_SYSTEM, -1);
+		}
+	}
+	return(0);
+}
+
+static int is_dir(const char *path, struct dirent *entry)
+{
+#ifdef DT_DIR
+	return(entry->d_type == DT_DIR);
+#else
+	char buffer[PATH_MAX];
+	snprintf(buffer, PATH_MAX, "%s/%s", path, entry->d_name);
+
+	struct stat sbuf;
+	if (!stat(buffer, &sbuf)) {
+		return(S_ISDIR(sbuf.st_mode));
+	}
+
+	return(0);
+#endif
+}
+
+int _alpm_local_db_populate(pmdb_t *db)
+{
+	int count = 0;
+	struct dirent *ent = NULL;
+	const char *dbpath;
+	DIR *dbdir;
+
+	ALPM_LOG_FUNC;
+
+	ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
+
+	dbpath = _alpm_db_path(db);
+	dbdir = opendir(dbpath);
+	if(dbdir == NULL) {
+		return(0);
+	}
+	while((ent = readdir(dbdir)) != NULL) {
+		const char *name = ent->d_name;
+
+		pmpkg_t *pkg;
+
+		if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
+			continue;
+		}
+		if(!is_dir(dbpath, ent)) {
+			continue;
+		}
+
+		pkg = _alpm_pkg_new();
+		if(pkg == NULL) {
+			closedir(dbdir);
+			return(-1);
+		}
+		/* split the db entry name */
+		if(_alpm_splitname(name, pkg) != 0) {
+			_alpm_log(PM_LOG_ERROR, _("invalid name for database entry '%s'\n"),
+					name);
+			_alpm_pkg_free(pkg);
+			continue;
+		}
+
+		/* duplicated database entries are not allowed */
+		if(_alpm_pkg_find(db->pkgcache, pkg->name)) {
+			_alpm_log(PM_LOG_ERROR, _("duplicated database entry '%s'\n"), pkg->name);
+			_alpm_pkg_free(pkg);
+			continue;
+		}
+
+		/* explicitly read with only 'BASE' data, accessors will handle the rest */
+		if(_alpm_local_db_read(db, pkg, INFRQ_BASE) == -1) {
+			_alpm_log(PM_LOG_ERROR, _("corrupted database entry '%s'\n"), name);
+			_alpm_pkg_free(pkg);
+			continue;
+		}
+
+		pkg->origin = PKG_FROM_LOCALDB;
+		pkg->ops = &local_pkg_ops;
+
+		pkg->origin_data.db = db;
+		/* add to the collection */
+		_alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
+				pkg->name, db->treename);
+		db->pkgcache = alpm_list_add(db->pkgcache, pkg);
+		count++;
+	}
+
+	closedir(dbdir);
+	db->pkgcache = alpm_list_msort(db->pkgcache, count, _alpm_pkg_cmp);
+	return(count);
+}
+
+/* Note: the return value must be freed by the caller */
+static char *get_pkgpath(pmdb_t *db, pmpkg_t *info)
+{
+	size_t len;
+	char *pkgpath;
+	const char *dbpath;
+
+	dbpath = _alpm_db_path(db);
+	len = strlen(dbpath) + strlen(info->name) + strlen(info->version) + 3;
+	MALLOC(pkgpath, len, RET_ERR(PM_ERR_MEMORY, NULL));
+	sprintf(pkgpath, "%s%s-%s/", dbpath, info->name, info->version);
+	return(pkgpath);
+}
+
+
+int _alpm_local_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
+{
+	FILE *fp = NULL;
+	char path[PATH_MAX];
+	char line[1024];
+	char *pkgpath = NULL;
+
+	ALPM_LOG_FUNC;
+
+	if(db == NULL) {
+		RET_ERR(PM_ERR_DB_NULL, -1);
+	}
+
+	if(info == NULL || info->name == NULL || info->version == NULL) {
+		_alpm_log(PM_LOG_DEBUG, "invalid package entry provided to _alpm_local_db_read, skipping\n");
+		return(-1);
+	}
+
+	if(info->origin == PKG_FROM_FILE) {
+		_alpm_log(PM_LOG_DEBUG, "request to read database info for a file-based package '%s', skipping...\n", info->name);
+		return(-1);
+	}
+
+	/* bitmask logic here:
+	 * infolevel: 00001111
+	 * inforeq:   00010100
+	 * & result:  00000100
+	 * == to inforeq? nope, we need to load more info. */
+	if((info->infolevel & inforeq) == inforeq) {
+		/* already loaded this info, do nothing */
+		return(0);
+	}
+	_alpm_log(PM_LOG_FUNCTION, "loading package data for %s : level=0x%x\n",
+			info->name, inforeq);
+
+	/* clear out 'line', to be certain - and to make valgrind happy */
+	memset(line, 0, sizeof(line));
+
+	pkgpath = get_pkgpath(db, info);
+
+	if(access(pkgpath, F_OK)) {
+		/* directory doesn't exist or can't be opened */
+		_alpm_log(PM_LOG_DEBUG, "cannot find '%s-%s' in db '%s'\n",
+				info->name, info->version, db->treename);
+		goto error;
+	}
+
+	/* DESC */
+	if(inforeq & INFRQ_DESC) {
+		snprintf(path, PATH_MAX, "%sdesc", pkgpath);
+		if((fp = fopen(path, "r")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			goto error;
+		}
+		while(!feof(fp)) {
+			if(fgets(line, sizeof(line), fp) == NULL) {
+				break;
+			}
+			_alpm_strtrim(line);
+			if(strcmp(line, "%NAME%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				if(strcmp(_alpm_strtrim(line), info->name) != 0) {
+					_alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: name "
+								"mismatch on package %s\n"), db->treename, info->name);
+				}
+			} else if(strcmp(line, "%VERSION%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				if(strcmp(_alpm_strtrim(line), info->version) != 0) {
+					_alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: version "
+								"mismatch on package %s\n"), db->treename, info->name);
+				}
+			} else if(strcmp(line, "%DESC%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				STRDUP(info->desc, _alpm_strtrim(line), goto error);
+			} else if(strcmp(line, "%GROUPS%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->groups = alpm_list_add(info->groups, linedup);
+				}
+			} else if(strcmp(line, "%URL%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				STRDUP(info->url, _alpm_strtrim(line), goto error);
+			} else if(strcmp(line, "%LICENSE%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->licenses = alpm_list_add(info->licenses, linedup);
+				}
+			} else if(strcmp(line, "%ARCH%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				STRDUP(info->arch, _alpm_strtrim(line), goto error);
+			} else if(strcmp(line, "%BUILDDATE%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(line);
+
+				char first = tolower((unsigned char)line[0]);
+				if(first > 'a' && first < 'z') {
+					struct tm tmp_tm = {0}; /* initialize to null in case of failure */
+					setlocale(LC_TIME, "C");
+					strptime(line, "%a %b %e %H:%M:%S %Y", &tmp_tm);
+					info->builddate = mktime(&tmp_tm);
+					setlocale(LC_TIME, "");
+				} else {
+					info->builddate = atol(line);
+				}
+			} else if(strcmp(line, "%INSTALLDATE%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				_alpm_strtrim(line);
+
+				char first = tolower((unsigned char)line[0]);
+				if(first > 'a' && first < 'z') {
+					struct tm tmp_tm = {0}; /* initialize to null in case of failure */
+					setlocale(LC_TIME, "C");
+					strptime(line, "%a %b %e %H:%M:%S %Y", &tmp_tm);
+					info->installdate = mktime(&tmp_tm);
+					setlocale(LC_TIME, "");
+				} else {
+					info->installdate = atol(line);
+				}
+			} else if(strcmp(line, "%PACKAGER%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				STRDUP(info->packager, _alpm_strtrim(line), goto error);
+			} else if(strcmp(line, "%REASON%") == 0) {
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				info->reason = (pmpkgreason_t)atol(_alpm_strtrim(line));
+			} else if(strcmp(line, "%SIZE%") == 0) {
+				/* NOTE: the CSIZE and SIZE fields both share the "size" field
+				 *       in the pkginfo_t struct.  This can be done b/c CSIZE
+				 *       is currently only used in sync databases, and SIZE is
+				 *       only used in local databases.
+				 */
+				if(fgets(line, sizeof(line), fp) == NULL) {
+					goto error;
+				}
+				info->size = atol(_alpm_strtrim(line));
+				/* also store this value to isize */
+				info->isize = info->size;
+			} else if(strcmp(line, "%REPLACES%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->replaces = alpm_list_add(info->replaces, linedup);
+				}
+			} else if(strcmp(line, "%FORCE%") == 0) {
+				info->force = 1;
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* FILES */
+	if(inforeq & INFRQ_FILES) {
+		snprintf(path, PATH_MAX, "%sfiles", pkgpath);
+		if((fp = fopen(path, "r")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			goto error;
+		}
+		while(fgets(line, sizeof(line), fp)) {
+			_alpm_strtrim(line);
+			if(strcmp(line, "%FILES%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->files = alpm_list_add(info->files, linedup);
+				}
+			} else if(strcmp(line, "%BACKUP%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->backup = alpm_list_add(info->backup, linedup);
+				}
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* DEPENDS */
+	if(inforeq & INFRQ_DEPENDS) {
+		snprintf(path, PATH_MAX, "%sdepends", pkgpath);
+		if((fp = fopen(path, "r")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			goto error;
+		}
+		while(!feof(fp)) {
+			if(fgets(line, sizeof(line), fp) == NULL) {
+				break;
+			}
+			_alpm_strtrim(line);
+			if(strcmp(line, "%DEPENDS%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					pmdepend_t *dep = _alpm_splitdep(_alpm_strtrim(line));
+					info->depends = alpm_list_add(info->depends, dep);
+				}
+			} else if(strcmp(line, "%OPTDEPENDS%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->optdepends = alpm_list_add(info->optdepends, linedup);
+				}
+			} else if(strcmp(line, "%CONFLICTS%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->conflicts = alpm_list_add(info->conflicts, linedup);
+				}
+			} else if(strcmp(line, "%PROVIDES%") == 0) {
+				while(fgets(line, sizeof(line), fp) && strlen(_alpm_strtrim(line))) {
+					char *linedup;
+					STRDUP(linedup, _alpm_strtrim(line), goto error);
+					info->provides = alpm_list_add(info->provides, linedup);
+				}
+			}
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* INSTALL */
+	if(inforeq & INFRQ_SCRIPTLET) {
+		snprintf(path, PATH_MAX, "%sinstall", pkgpath);
+		if(access(path, F_OK) == 0) {
+			info->scriptlet = 1;
+		}
+	}
+
+	/* internal */
+	info->infolevel |= inforeq;
+
+	free(pkgpath);
+	return(0);
+
+error:
+	free(pkgpath);
+	if(fp) {
+		fclose(fp);
+	}
+	return(-1);
+}
+
+int _alpm_local_db_prepare(pmdb_t *db, pmpkg_t *info)
+{
+	mode_t oldmask;
+	int retval = 0;
+	char *pkgpath = NULL;
+
+	if(checkdbdir(db) != 0) {
+		return(-1);
+	}
+
+	oldmask = umask(0000);
+	pkgpath = get_pkgpath(db, info);
+
+	if((retval = mkdir(pkgpath, 0755)) != 0) {
+		_alpm_log(PM_LOG_ERROR, _("could not create directory %s: %s\n"),
+				pkgpath, strerror(errno));
+	}
+
+	free(pkgpath);
+	umask(oldmask);
+
+	return(retval);
+}
+
+int _alpm_local_db_write(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
+{
+	FILE *fp = NULL;
+	char path[PATH_MAX];
+	mode_t oldmask;
+	alpm_list_t *lp = NULL;
+	int retval = 0;
+	char *pkgpath = NULL;
+
+	ALPM_LOG_FUNC;
+
+	if(db == NULL || info == NULL) {
+		return(-1);
+	}
+
+	pkgpath = get_pkgpath(db, info);
+
+	/* make sure we have a sane umask */
+	oldmask = umask(0022);
+
+	if(strcmp(db->treename, "local") != 0) {
+		return(-1);
+	}
+
+	/* DESC */
+	if(inforeq & INFRQ_DESC) {
+		_alpm_log(PM_LOG_DEBUG, "writing %s-%s DESC information back to db\n",
+				info->name, info->version);
+		snprintf(path, PATH_MAX, "%sdesc", pkgpath);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			retval = -1;
+			goto cleanup;
+		}
+		fprintf(fp, "%%NAME%%\n%s\n\n"
+						"%%VERSION%%\n%s\n\n", info->name, info->version);
+		if(info->desc) {
+			fprintf(fp, "%%DESC%%\n"
+							"%s\n\n", info->desc);
+		}
+		if(info->groups) {
+			fputs("%GROUPS%\n", fp);
+			for(lp = info->groups; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->replaces) {
+			fputs("%REPLACES%\n", fp);
+			for(lp = info->replaces; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->force) {
+			fprintf(fp, "%%FORCE%%\n\n");
+		}
+		if(info->url) {
+			fprintf(fp, "%%URL%%\n"
+							"%s\n\n", info->url);
+		}
+		if(info->licenses) {
+			fputs("%LICENSE%\n", fp);
+			for(lp = info->licenses; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->arch) {
+			fprintf(fp, "%%ARCH%%\n"
+							"%s\n\n", info->arch);
+		}
+		if(info->builddate) {
+			fprintf(fp, "%%BUILDDATE%%\n"
+							"%ld\n\n", info->builddate);
+		}
+		if(info->installdate) {
+			fprintf(fp, "%%INSTALLDATE%%\n"
+							"%ld\n\n", info->installdate);
+		}
+		if(info->packager) {
+			fprintf(fp, "%%PACKAGER%%\n"
+							"%s\n\n", info->packager);
+		}
+		if(info->isize) {
+			/* only write installed size, csize is irrelevant once installed */
+			fprintf(fp, "%%SIZE%%\n"
+							"%jd\n\n", (intmax_t)info->isize);
+		}
+		if(info->reason) {
+			fprintf(fp, "%%REASON%%\n"
+							"%u\n\n", info->reason);
+		}
+
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* FILES */
+	if(inforeq & INFRQ_FILES) {
+		_alpm_log(PM_LOG_DEBUG, "writing %s-%s FILES information back to db\n",
+				info->name, info->version);
+		snprintf(path, PATH_MAX, "%sfiles", pkgpath);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			retval = -1;
+			goto cleanup;
+		}
+		if(info->files) {
+			fprintf(fp, "%%FILES%%\n");
+			for(lp = info->files; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->backup) {
+			fprintf(fp, "%%BACKUP%%\n");
+			for(lp = info->backup; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* DEPENDS */
+	if(inforeq & INFRQ_DEPENDS) {
+		_alpm_log(PM_LOG_DEBUG, "writing %s-%s DEPENDS information back to db\n",
+			info->name, info->version);
+		snprintf(path, PATH_MAX, "%sdepends", pkgpath);
+		if((fp = fopen(path, "w")) == NULL) {
+			_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
+			retval = -1;
+			goto cleanup;
+		}
+		if(info->depends) {
+			fputs("%DEPENDS%\n", fp);
+			for(lp = info->depends; lp; lp = lp->next) {
+				char *depstring = alpm_dep_compute_string(lp->data);
+				fprintf(fp, "%s\n", depstring);
+				free(depstring);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->optdepends) {
+			fputs("%OPTDEPENDS%\n", fp);
+			for(lp = info->optdepends; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->conflicts) {
+			fputs("%CONFLICTS%\n", fp);
+			for(lp = info->conflicts; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		if(info->provides) {
+			fputs("%PROVIDES%\n", fp);
+			for(lp = info->provides; lp; lp = lp->next) {
+				fprintf(fp, "%s\n", (char *)lp->data);
+			}
+			fprintf(fp, "\n");
+		}
+		fclose(fp);
+		fp = NULL;
+	}
+
+	/* INSTALL */
+	/* nothing needed here (script is automatically extracted) */
+
+cleanup:
+	umask(oldmask);
+	free(pkgpath);
+
+	if(fp) {
+		fclose(fp);
+	}
+
+	return(retval);
+}
+
+int _alpm_local_db_remove(pmdb_t *db, pmpkg_t *info)
+{
+	int ret = 0;
+	char *pkgpath = NULL;
+
+	ALPM_LOG_FUNC;
+
+	if(db == NULL || info == NULL) {
+		RET_ERR(PM_ERR_DB_NULL, -1);
+	}
+
+	pkgpath = get_pkgpath(db, info);
+
+	ret = _alpm_rmrf(pkgpath);
+	free(pkgpath);
+	if(ret != 0) {
+		ret = -1;
+	}
+	return(ret);
+}
+
+struct db_operations local_db_ops = {
+	.populate         = _alpm_local_db_populate,
+	.unregister       = _alpm_db_unregister,
+};
+
+pmdb_t *_alpm_db_register_local(void)
+{
+	pmdb_t *db;
+
+	ALPM_LOG_FUNC;
+
+	if(handle->db_local != NULL) {
+		_alpm_log(PM_LOG_WARNING, _("attempt to re-register the 'local' DB\n"));
+		RET_ERR(PM_ERR_DB_NOT_NULL, NULL);
+	}
+
+	_alpm_log(PM_LOG_DEBUG, "registering local database\n");
+
+	db = _alpm_db_new("local", 1);
+	db->ops = &local_db_ops;
+	if(db == NULL) {
+		RET_ERR(PM_ERR_DB_CREATE, NULL);
+	}
+
+	handle->db_local = db;
+	return(db);
+}
+
+
+/* vim: set ts=2 sw=2 noet: */