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/*
* Copyright (C) 2008 Kristian Høgsberg <krh@redhat.com>
* Copyright (C) 2008 Red Hat, Inc
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>
#include "razor.h"
#include "razor-internal.h"
static const char system_repo_filename[] = "system.rzdb";
static const char system_repo_details_filename[] = "system-details.rzdb";
static const char system_repo_files_filename[] = "system-files.rzdb";
static const char next_repo_filename[] = "system-next.rzdb";
static const char razor_root_path[] = "/var/lib/razor";
struct razor_root {
struct razor_set *system;
struct razor_set *next;
int fd;
char path[PATH_MAX];
char new_path[PATH_MAX];
};
RAZOR_EXPORT int
razor_root_create(const char *root)
{
struct stat buf;
struct razor_set *set;
char path[PATH_MAX], details_path[PATH_MAX], files_path[PATH_MAX];
assert (root != NULL);
if (stat(root, &buf) < 0) {
if (mkdir(root, 0777) < 0) {
fprintf(stderr,
"could not create install root \"%s\"\n",
root);
return -1;
}
fprintf(stderr, "created install root \"%s\"\n", root);
} else if (!S_ISDIR(buf.st_mode)) {
fprintf(stderr,
"install root \"%s\" exists, but is not a directory\n",
root);
return -1;
}
snprintf(path, sizeof path, "%s/%s",
razor_root_path, system_repo_filename);
if (razor_create_dir(root, path) < 0) {
fprintf(stderr, "could not create %s%s\n",
root, razor_root_path);
return -1;
}
set = razor_set_create();
snprintf(path, sizeof path, "%s%s/%s",
root, razor_root_path, system_repo_filename);
snprintf(details_path, sizeof details_path, "%s%s/%s",
root, razor_root_path, system_repo_details_filename);
snprintf(files_path, sizeof files_path, "%s%s/%s",
root, razor_root_path, system_repo_files_filename);
if (stat(path, &buf) == 0) {
fprintf(stderr,
"a razor install root is already initialized\n");
return -1;
}
if (razor_set_write(set, path, RAZOR_REPO_FILE_MAIN) < 0 ||
razor_set_write(set, details_path, RAZOR_REPO_FILE_DETAILS) < 0 ||
razor_set_write(set, files_path, RAZOR_REPO_FILE_FILES) < 0 ) {
fprintf(stderr, "could not write initial package set\n");
return -1;
}
razor_set_destroy(set);
return 0;
}
RAZOR_EXPORT struct razor_root *
razor_root_open(const char *root)
{
struct razor_root *image;
assert (root != NULL);
image = malloc(sizeof *image);
if (image == NULL)
return NULL;
/* Create the new next repo file up front to ensure exclusive
* access. */
snprintf(image->new_path, sizeof image->new_path,
"%s%s/%s", root, razor_root_path, next_repo_filename);
image->fd = open(image->new_path,
O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0666);
if (image->fd < 0) {
fprintf(stderr, "failed to get lock file, "
"maybe previous operation crashed?\n");
/* FIXME: Use fcntl advisory locking on the system
* package set file to figure out whether previous
* operation crashed or is still in progress. */
free(image);
return NULL;
}
snprintf(image->path, sizeof image->path,
"%s%s/%s", root, razor_root_path, system_repo_filename);
image->system = razor_set_open(image->path);
if (image->system == NULL) {
unlink(image->new_path);
close(image->fd);
free(image);
return NULL;
}
return image;
}
RAZOR_EXPORT struct razor_set *
razor_root_open_read_only(const char *root)
{
char path[PATH_MAX];
assert (root != NULL);
snprintf(path, sizeof path, "%s%s/%s",
root, razor_root_path, system_repo_filename);
return razor_set_open(path);
}
RAZOR_EXPORT struct razor_set *
razor_root_get_system_set(struct razor_root *root)
{
assert (root != NULL);
return root->system;
}
RAZOR_EXPORT int
razor_root_close(struct razor_root *root)
{
assert (root != NULL);
razor_set_destroy(root->system);
unlink(root->new_path);
close(root->fd);
free(root);
return 0;
}
RAZOR_EXPORT void
razor_root_update(struct razor_root *root, struct razor_set *next)
{
assert (root != NULL);
assert (next != NULL);
razor_set_write_to_fd(next, root->fd, RAZOR_REPO_FILE_MAIN);
root->next = next;
/* Sync the new repo file so the new package set is on disk
* before we start upgrading. */
fsync(root->fd);
printf("wrote %s\n", root->new_path);
}
RAZOR_EXPORT int
razor_root_commit(struct razor_root *root)
{
assert (root != NULL);
/* Make it so. */
rename(root->new_path, root->path);
printf("renamed %s to %s\n", root->new_path, root->path);
razor_set_destroy(root->system);
close(root->fd);
free(root);
return 0;
}
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