Initial import of xbps with code as August '09.

--HG--
extra : convert_revision : juan%40xbps-20090817170720-amxxac4a2e8bza1j

lib/purge.c

@@ -0,0 +1,203 @@
+/*-
+ * Copyright (c) 2009 Juan Romero Pardines.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <dirent.h>
+
+#include <xbps_api.h>
+
+static int	remove_pkg_metadata(const char *);
+
+/*
+ * Purge a package that is currently in "config-files" state.
+ * This removes configuration files if they weren't modified,
+ * removes metadata files and fully unregisters the package.
+ */
+int
+xbps_purge_pkg(const char *pkgname)
+{
+	prop_dictionary_t dict;
+	prop_array_t array;
+	prop_object_t obj;
+	prop_object_iterator_t iter;
+	const char *rootdir, *file, *sha256;
+	char *path;
+	int rv = 0, flags;
+	pkg_state_t state = 0;
+
+	assert(pkgname != NULL);
+	rootdir = xbps_get_rootdir();
+	flags = xbps_get_flags();
+
+	/*
+	 * Skip packages that aren't in "config-files" state.
+	 */
+	if ((rv = xbps_get_pkg_state_installed(pkgname, &state)) != 0)
+		return rv;
+
+	if (state != XBPS_PKG_STATE_CONFIG_FILES)
+		return 0;
+
+	/*
+	 * Iterate over the pkg file list dictionary and remove all
+	 * unmodified configuration files.
+	 */
+	path = xbps_xasprintf("%s/%s/metadata/%s/%s",
+	    rootdir, XBPS_META_PATH, pkgname, XBPS_PKGFILES);
+	if (path == NULL)
+                return errno;
+
+	dict = prop_dictionary_internalize_from_file(path);
+	if (dict == NULL) {
+		free(path);
+		return errno;
+	}
+	free(path);
+
+	array = prop_dictionary_get(dict, "conf_files");
+	if (array == NULL) {
+		goto out;
+	} else if (prop_object_type(array) != PROP_TYPE_ARRAY) {
+		prop_object_release(dict);
+		return EINVAL;
+	} else if (prop_array_count(array) == 0) {
+		goto out;
+	}
+
+	iter = xbps_get_array_iter_from_dict(dict, "conf_files");
+	if (iter == NULL)
+		return EINVAL;
+
+	while ((obj = prop_object_iterator_next(iter))) {
+		if (!prop_dictionary_get_cstring_nocopy(obj, "file", &file)) {
+			prop_object_iterator_release(iter);
+			prop_object_release(dict);
+			return EINVAL;
+		}
+		path = xbps_xasprintf("%s/%s", rootdir, file);
+		if (path == NULL) {
+			prop_object_iterator_release(iter);
+			prop_object_release(dict);
+			return EINVAL;
+		}
+		prop_dictionary_get_cstring_nocopy(obj, "sha256", &sha256);
+		rv = xbps_check_file_hash(path, sha256);
+		if (rv == ENOENT) {
+			printf("Configuration file %s doesn't exist!\n", file);
+			free(path);
+			continue;
+		} else if (rv == ERANGE) {
+			if (flags & XBPS_FLAG_VERBOSE)
+				printf("Configuration file %s has been "
+				    "modified, preserving...\n", file);
+
+			free(path);
+			continue;
+		} else if (rv != 0 && rv != ERANGE) {
+			free(path);
+			prop_object_iterator_release(iter);
+			prop_object_release(dict);
+			return rv;
+		}
+		if ((rv = remove(path)) == -1) {
+			if (flags & XBPS_FLAG_VERBOSE)
+				printf("WARNING: can't remove %s (%s)\n",
+				    file, strerror(errno));
+
+			free(path);
+			continue;
+		}
+		if (flags & XBPS_FLAG_VERBOSE)
+			printf("Removed configuration file %s\n", file);
+
+		free(path);
+	}
+
+	prop_object_iterator_release(iter);
+out:
+	prop_object_release(dict);
+
+	if ((rv = remove_pkg_metadata(pkgname)) == 0) {
+		if ((rv = xbps_unregister_pkg(pkgname)) == 0)
+			printf("Package %s has been purged successfully.\n",
+			    pkgname);
+	}
+
+	return rv;
+}
+
+static int
+remove_pkg_metadata(const char *pkgname)
+{
+	struct dirent *dp;
+	DIR *dirp;
+	const char *rootdir;
+	char *metadir, *path;
+	int flags = 0, rv = 0;
+
+	assert(pkgname != NULL);
+
+	rootdir = xbps_get_rootdir();
+	flags = xbps_get_flags();
+
+	metadir = xbps_xasprintf("%s/%s/metadata/%s", rootdir,
+	     XBPS_META_PATH, pkgname);
+	if (metadir == NULL)
+		return errno;
+
+	dirp = opendir(metadir);
+	if (dirp == NULL) {
+		free(metadir);
+		return errno;
+	}
+
+	while ((dp = readdir(dirp)) != NULL) {
+		if ((strcmp(dp->d_name, ".") == 0) ||
+		    (strcmp(dp->d_name, "..") == 0))
+			continue;
+
+		path = xbps_xasprintf("%s/%s", metadir, dp->d_name);
+		if (path == NULL) {
+			(void)closedir(dirp);
+			free(metadir);
+			return -1;
+		}
+
+		if ((rv = unlink(path)) == -1) {
+			if (flags & XBPS_FLAG_VERBOSE)
+				printf("WARNING: can't remove %s (%s)\n",
+				    pkgname, strerror(errno));
+		}
+		free(path);
+	}
+	(void)closedir(dirp);
+	rv = rmdir(metadir);
+	free(metadir);
+
+	return rv;
+}