richard@300: /*
richard@300:  * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>
richard@300:  * Copyright (C) 2008  Red Hat, Inc
ali@403:  * Copyright (C) 2009, 2011  J. Ali Harlow <ali@juiblex.co.uk>
richard@300:  *
richard@300:  * This program is free software; you can redistribute it and/or modify
richard@300:  * it under the terms of the GNU General Public License as published by
richard@300:  * the Free Software Foundation; either version 2 of the License, or
richard@300:  * (at your option) any later version.
richard@300:  *
richard@300:  * This program is distributed in the hope that it will be useful,
richard@300:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
richard@300:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
richard@300:  * GNU General Public License for more details.
richard@300:  *
richard@300:  * You should have received a copy of the GNU General Public License along
richard@300:  * with this program; if not, write to the Free Software Foundation, Inc.,
richard@300:  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
richard@300:  */
richard@300: 
ali@340: #include "config.h"
ali@340: 
krh@248: #include <stdlib.h>
krh@248: #include <stdint.h>
krh@248: #include <stdio.h>
krh@317: #include <string.h>
krh@248: #include <sys/stat.h>
krh@248: #include <dirent.h>
krh@248: #include <unistd.h>
krh@248: #include <fcntl.h>
ali@325: #include <limits.h>
richard@301: #include <assert.h>
ali@340: #ifdef MSWIN_API
ali@340: #include <shlobj.h>
ali@340: #endif
richard@301: 
krh@248: #include "razor.h"
krh@248: #include "razor-internal.h"
krh@248: 
ali@345: #ifndef O_BINARY
ali@345: #define O_BINARY	0
ali@345: #endif
ali@345: 
richard@310: static const char system_repo_filename[] = "system.rzdb";
ali@388: /*
ali@388:  * system_lock_filename is chosen to be the same as the pre v0.3
ali@388:  * next_repo_filename. This means that once a system has been
ali@388:  * updated by a v0.3+ copy of razor all pre v0.3 versions of razor
ali@388:  * will see the system as permenantly locked.
ali@388:  */
ali@388: static const char system_lock_filename[] = "system-next.rzdb";
ali@388: static const char system_tmp_filename[] = "system.tmp";
ali@340: #ifdef MSWIN_API
ali@340: #define RAZOR_ROOT_PATH	NULL
ali@340: #else
ali@340: #define RAZOR_ROOT_PATH	"/var/lib/razor"
ali@340: #endif
ali@340: static const char *razor_root_path = RAZOR_ROOT_PATH;
krh@248: 
krh@248: struct razor_root {
krh@248: 	struct razor_set *system;
krh@248: 	struct razor_set *next;
ali@403: 	struct razor_atomic *atomic;
ali@403: 	int handle;
ali@403: 	char *path, *new_path;
krh@248: };
krh@248: 
ali@340: static void
ali@340: razor_root_init(void)
ali@340: {
ali@340: #ifdef MSWIN_API
ali@340: 	static char root_path[MAX_PATH];
ali@340: 	if (!razor_root_path) {
ali@340: 		SHGetFolderPath(NULL,
ali@340: 			CSIDL_COMMON_APPDATA | CSIDL_FLAG_DONT_VERIFY, NULL, 0,
ali@340: 			root_path);
ali@340: 		strcat(root_path, "\\Razor");
ali@340: 		razor_root_path = root_path;
ali@340: 	}
ali@340: #endif
ali@340: }
ali@340: 
krh@269: RAZOR_EXPORT int
krh@248: razor_root_create(const char *root)
krh@248: {
ali@403: 	int retval;
krh@248: 	struct stat buf;
krh@248: 	struct razor_set *set;
ali@403: 	struct razor_atomic *atomic;
ali@406: 	char *file, *path;
krh@248: 
richard@301: 	assert (root != NULL);
richard@301: 
ali@340: 	razor_root_init();
krh@317: 	if (root[0] == '\0') {
krh@317: 		/* root is file system root */
krh@317: 	} else if (stat(root, &buf) < 0) {
krh@248: 		if (mkdir(root, 0777) < 0) {
krh@248: 			fprintf(stderr,
krh@248: 				"could not create install root \"%s\"\n",
krh@248: 				root);
krh@248: 			return -1;
krh@248: 		}
krh@248: 		fprintf(stderr, "created install root \"%s\"\n", root);
krh@248: 	} else if (!S_ISDIR(buf.st_mode)) {
krh@248: 		fprintf(stderr,
krh@248: 			"install root \"%s\" exists, but is not a directory\n",
krh@248: 			root);
krh@248: 		return -1;
krh@248: 	}
krh@248: 
ali@406: 	file = razor_concat(razor_root_path, "/", system_repo_filename, NULL);
ali@406: 	path = razor_concat(root, file, NULL);
ali@403: 	retval = !stat(path, &buf);
ali@403: 	if (retval) {
ali@403: 		fprintf(stderr,
ali@403: 			"a razor install root is already initialized\n");
ali@406: 		free(path);
ali@406: 		free(file);
ali@403: 		return retval;
krh@248: 	}
krh@248: 
ali@403: 	atomic = razor_atomic_open("Create initial package set");
ali@406: 	razor_atomic_make_dirs(atomic, root, file);
krh@248: 	set = razor_set_create();
ali@403: 	razor_set_write(set, atomic, path, RAZOR_SECTION_ALL);
ali@403: 	free(path);
ali@406: 	free(file);
ali@403: 	retval = razor_atomic_commit(atomic);
ali@403: 	if (retval)
krh@248: 		fprintf(stderr, "could not write initial package set\n");
ali@403: 	razor_set_unref(set);
ali@403: 	razor_atomic_destroy(atomic);
krh@248: 
ali@403: 	return retval;
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT struct razor_root *
ali@403: razor_root_open(const char *root, struct razor_atomic *atomic)
krh@248: {
krh@248: 	struct razor_root *image;
ali@403: 	char *lock_path;
ali@403: 	int r;
krh@248: 
richard@301: 	assert (root != NULL);
richard@301: 
ali@340: 	razor_root_init();
krh@248: 	image = malloc(sizeof *image);
ali@403: 	if (image == NULL) {
ali@403: 		razor_atomic_abort(atomic, "Not enough memory");
krh@248: 		return NULL;
ali@403: 	}
ali@403: 
ali@403: 	image->atomic = atomic;
krh@248: 
ali@388: 	image->system = razor_set_create_without_root();
ali@388: 	if (image->system == NULL) {
ali@388: 		free(image);
ali@403: 		razor_atomic_abort(atomic, "Not enough memory");
ali@388: 		return NULL;
ali@388: 	}
ali@388: 
ali@403: 	lock_path = razor_concat(root, razor_root_path, "/",
ali@403: 				 system_lock_filename, NULL);
ali@388: 
ali@403: 	r = razor_set_aquire_lock(image->system, lock_path, 1);
ali@403: 
ali@403: 	free(lock_path);
ali@403: 
ali@403: 	if (r < 0) {
ali@403: 		razor_atomic_abort(atomic,
ali@403: 				   "Failed to aquire exclusive system lock");
ali@403: 		razor_set_unref(image->system);
ali@388: 		free(image);
ali@388: 		return NULL;
ali@388: 	}
ali@388: 
ali@403: 	image->new_path = razor_concat(root, razor_root_path, "/",
ali@403: 				       system_tmp_filename, NULL);
ali@403: 	image->handle = razor_atomic_create_file(atomic, image->new_path,
ali@403: 						 S_IRWXU | S_IRWXG | S_IRWXO);
ali@403: 	if (image->handle < 0) {
ali@403: 		free(image->new_path);
ali@403: 		razor_set_unref(image->system);
krh@248: 		free(image);
krh@248: 		return NULL;
krh@248: 	}
krh@248: 
ali@403: 	image->path = razor_concat(root, razor_root_path, "/",
ali@403: 				   system_repo_filename, NULL);
krh@317: 
ali@403: 	if (razor_set_bind_sections(image->system, atomic, image->path)) {
krh@248: 		unlink(image->new_path);
ali@403: 		free(image->new_path);
ali@403: 		free(image->path);
ali@403: 		razor_set_unref(image->system);
krh@248: 		free(image);
krh@248: 		return NULL;
krh@248: 	}
krh@248: 
krh@248: 	return image;
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT struct razor_set *
ali@403: razor_root_open_read_only(const char *root, struct razor_atomic *atomic)
krh@248: {
ali@403: 	char *path;
ali@388: 	struct razor_set *set;
krh@248: 
richard@301: 	assert (root != NULL);
richard@301: 
ali@340: 	razor_root_init();
ali@388: 	set = razor_set_create_without_root();
ali@403: 	if (set == NULL) {
ali@403: 		razor_atomic_abort(atomic, "Not enough memory");
ali@388: 		return NULL;
ali@388: 	}
ali@388: 
ali@403: 	path = razor_concat(root, razor_root_path, "/", system_lock_filename,
ali@403: 			    NULL);
ali@403: 	if (razor_set_aquire_lock(set, path, 0) < 0) {
ali@403: 		razor_atomic_abort(atomic, "Failed to aquire non-exclusive "
ali@403: 					   "system lock");
ali@403: 		free(path);
ali@403: 		razor_set_unref(set);
ali@388: 		return NULL;
ali@388: 	}
ali@388: 
ali@403: 	free(path);
ali@403: 	path = razor_concat(root, razor_root_path, "/", system_repo_filename,
ali@403: 			    NULL);
ali@403: 
ali@403: 	if (razor_set_bind_sections(set, atomic, path)) {
ali@403: 		razor_set_unref(set);
ali@403: 		set = NULL;
ali@403: 	}
ali@403: 
ali@403: 	free(path);
ali@403: 
ali@388: 	return set;
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT struct razor_set *
krh@250: razor_root_get_system_set(struct razor_root *root)
krh@248: {
richard@301: 	assert (root != NULL);
richard@301: 
krh@250: 	return root->system;
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT int
krh@250: razor_root_close(struct razor_root *root)
krh@248: {
richard@301: 	assert (root != NULL);
richard@301: 
ali@403: 	razor_set_unref(root->system);
ali@403: 	razor_atomic_close(root->atomic, root->handle);
ali@403: 	razor_atomic_remove(root->atomic, root->new_path);
ali@403: 	free(root->path);
ali@403: 	free(root->new_path);
krh@250: 	free(root);
krh@248: 
krh@248: 	return 0;
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT void
krh@248: razor_root_update(struct razor_root *root, struct razor_set *next)
krh@248: {
richard@301: 	assert (root != NULL);
richard@301: 	assert (next != NULL);
richard@301: 
ali@340: 	razor_root_init();
ali@403: 	razor_set_write_to_handle(next, root->atomic, root->handle,
ali@403: 				  RAZOR_SECTION_ALL);
krh@248: 	root->next = next;
krh@248: 
krh@248: 	/* Sync the new repo file so the new package set is on disk
krh@248: 	 * before we start upgrading. */
ali@403: 	razor_atomic_sync(root->atomic, root->handle);
krh@248: }
krh@248: 
krh@269: RAZOR_EXPORT int
krh@250: razor_root_commit(struct razor_root *root)
krh@248: {
ali@346: 	int retval;
richard@301: 	assert (root != NULL);
richard@301: 
ali@403: 	razor_atomic_close(root->atomic, root->handle);
ali@403: 	retval = razor_atomic_rename_file(root->atomic, root->new_path,
ali@403: 					  root->path);
ali@403: 	razor_set_unref(root->system);
ali@403: 	free(root->path);
ali@403: 	free(root->new_path);
krh@250: 	free(root);
krh@248: 
ali@346: 	return retval;
krh@248: }