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db: relocate from /var/lib/apk 

move all files therein to other places. this allows /var to be
mounted from harddisk, but rest of system be run from ramdisk.

this also removes support for historical version of the scripts
database which was obsoleted in 2.0_pre16 (in July 2009).
cute-signatures
Timo Teräs 2011-03-16 16:52:14 +02:00
parent 2222a15edd
commit 93eb38a31a
3 changed files with 91 additions and 47 deletions
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1
src/apk_io.h
View File

@ -110,6 +110,7 @@ apk_blob_t apk_blob_from_file(int atfd, const char *file);
int apk_file_get_info(int atfd, const char *filename, unsigned int flags,
struct apk_file_info *fi);
int apk_move_file(int atfd, const char *from, const char *to);
int apk_url_download(const char *url, int atfd, const char *file);
const char *apk_url_local_file(const char *url);

106
src/database.c
View File

@ -52,10 +52,27 @@ unsigned int apk_flags = 0;
const char *apk_arch = APK_DEFAULT_ARCH;
const char * const apkindex_tar_gz = "APKINDEX.tar.gz";
static const char * const apk_static_cache_dir = "var/lib/apk";
static const char * const apk_static_cache_dir = "var/cache/apk";
static const char * const apk_linked_cache_dir = "etc/apk/cache";
static const char * const apk_lock_file = "var/lock/apkdb";
static const char * const apk_world_file = "etc/apk/world";
static const char * const apk_world_file_tmp = "etc/apk/world.new";
static const char * const apk_world_file_old = "var/lib/apk/world";
static const char * const apk_scripts_file = "lib/apk/db/scripts.tar";
static const char * const apk_scripts_file_tmp = "lib/apk/db/scripts.tar.new";
static const char * const apk_scripts_file_old = "var/lib/apk/scripts.tar";
static const char * const apk_triggers_file = "lib/apk/db/triggers";
static const char * const apk_triggers_file_tmp = "lib/apk/db/triggers.new";
static const char * const apk_triggers_file_old = "var/lib/apk/triggers";
static const char * const apk_installed_file = "lib/apk/db/installed";
static const char * const apk_installed_file_tmp = "lib/apk/db/installed.new";
static const char * const apk_installed_file_old = "var/lib/apk/installed";
struct install_ctx {
struct apk_database *db;
struct apk_package *pkg;
@ -784,30 +801,6 @@ static int apk_db_scriptdb_write(struct apk_database *db, struct apk_ostream *os
return apk_tar_write_entry(os, NULL, NULL);
}
static int apk_db_scriptdb_read_v1(struct apk_database *db, struct apk_istream *is)
{
struct apk_package *pkg;
struct {
unsigned char md5sum[16];
unsigned int type;
unsigned int size;
} hdr;
struct apk_checksum csum;
while (is->read(is, &hdr, sizeof(hdr)) == sizeof(hdr)) {
memcpy(csum.data, hdr.md5sum, sizeof(hdr.md5sum));
csum.type = APK_CHECKSUM_MD5;
pkg = apk_db_get_pkg(db, &csum);
if (pkg != NULL && pkg->ipkg != NULL)
apk_ipkg_add_script(pkg->ipkg, is, hdr.type, hdr.size);
else
apk_istream_skip(is, hdr.size);
}
return 0;
}
static int apk_read_script_archive_entry(void *ctx,
const struct apk_file_info *ae,
struct apk_istream *is)
@ -920,7 +913,7 @@ static int apk_db_read_state(struct apk_database *db, int flags)
* 6. script db
*/
if (!(flags & APK_OPENF_NO_WORLD)) {
blob = apk_blob_from_file(db->root_fd, "var/lib/apk/world");
blob = apk_blob_from_file(db->root_fd, apk_world_file);
if (APK_BLOB_IS_NULL(blob))
return -ENOENT;
apk_deps_parse(db, &db->world, blob);
@ -931,7 +924,7 @@ static int apk_db_read_state(struct apk_database *db, int flags)
}
if (!(flags & APK_OPENF_NO_INSTALLED)) {
bs = apk_bstream_from_file(db->root_fd, "var/lib/apk/installed");
bs = apk_bstream_from_file(db->root_fd, apk_installed_file);
if (bs != NULL) {
r = apk_db_index_read(db, bs, -1);
bs->close(bs, NULL);
@ -939,7 +932,7 @@ static int apk_db_read_state(struct apk_database *db, int flags)
return -1;
}
bs = apk_bstream_from_file(db->root_fd, "var/lib/apk/triggers");
bs = apk_bstream_from_file(db->root_fd, apk_triggers_file);
if (bs != NULL) {
apk_db_triggers_read(db, bs);
bs->close(bs, NULL);
@ -947,17 +940,12 @@ static int apk_db_read_state(struct apk_database *db, int flags)
}
if (!(flags & APK_OPENF_NO_SCRIPTS)) {
is = apk_istream_from_file(db->root_fd, "var/lib/apk/scripts.tar");
is = apk_istream_from_file(db->root_fd, apk_scripts_file);
if (is != NULL) {
apk_tar_parse(is, apk_read_script_archive_entry, db,
FALSE, &db->id_cache);
} else {
is = apk_istream_from_file(db->root_fd, "var/lib/apk/scripts");
if (is != NULL)
apk_db_scriptdb_read_v1(db, is);
}
if (is != NULL)
is->close(is);
}
}
return 0;
@ -1047,14 +1035,18 @@ static int apk_db_create(struct apk_database *db)
mkdirat(db->root_fd, "tmp", 01777);
mkdirat(db->root_fd, "dev", 0755);
mknodat(db->root_fd, "dev/null", 0666, makedev(1, 3));
mkdirat(db->root_fd, "etc", 0755);
mkdirat(db->root_fd, "etc/apk", 0755);
mkdirat(db->root_fd, "lib", 0755);
mkdirat(db->root_fd, "lib/apk", 0755);
mkdirat(db->root_fd, "lib/apk/db", 0755);
mkdirat(db->root_fd, "var", 0755);
mkdirat(db->root_fd, "var/lib", 0755);
mkdirat(db->root_fd, "var/lib/apk", 0755);
mkdirat(db->root_fd, "var/cache", 0755);
mkdirat(db->root_fd, "var/cache/apk", 0755);
mkdirat(db->root_fd, "var/cache/misc", 0755);
mkdirat(db->root_fd, "var/lock", 0755);
fd = openat(db->root_fd, "var/lib/apk/world", O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC, 0644);
fd = openat(db->root_fd, apk_world_file, O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC, 0644);
if (fd < 0)
return -errno;
close(fd);
@ -1117,6 +1109,24 @@ static int do_remount(const char *path, const char *option)
return WEXITSTATUS(status);
}
static void relocate_database(struct apk_database *db)
{
mkdirat(db->root_fd, "etc", 0755);
mkdirat(db->root_fd, "etc/apk", 0755);
mkdirat(db->root_fd, "lib", 0755);
mkdirat(db->root_fd, "lib/apk", 0755);
mkdirat(db->root_fd, "lib/apk/db", 0755);
mkdirat(db->root_fd, "var", 0755);
mkdirat(db->root_fd, "var/cache", 0755);
mkdirat(db->root_fd, "var/cache/apk", 0755);
mkdirat(db->root_fd, "var/cache/misc", 0755);
mkdirat(db->root_fd, "var/lock", 0755);
apk_move_file(db->root_fd, apk_world_file_old, apk_world_file);
apk_move_file(db->root_fd, apk_scripts_file_old, apk_scripts_file);
apk_move_file(db->root_fd, apk_triggers_file_old, apk_triggers_file);
apk_move_file(db->root_fd, apk_installed_file_old, apk_installed_file);
}
int apk_db_open(struct apk_database *db, struct apk_db_options *dbopts)
{
const char *msg = NULL;
@ -1164,6 +1174,9 @@ int apk_db_open(struct apk_database *db, struct apk_db_options *dbopts)
apk_id_cache_init(&db->id_cache, db->root_fd);
if (dbopts->open_flags & APK_OPENF_WRITE) {
if (faccessat(db->root_fd, apk_installed_file_old, F_OK, 0) == 0)
relocate_database(db);
db->lock_fd = openat(db->root_fd, apk_lock_file,
O_CREAT | O_RDWR | O_CLOEXEC, 0400);
if (db->lock_fd < 0 && errno == ENOENT &&
@ -1331,8 +1344,8 @@ int apk_db_write_config(struct apk_database *db)
}
os = apk_ostream_to_file(db->root_fd,
"var/lib/apk/world",
"var/lib/apk/world.new",
apk_world_file,
apk_world_file_tmp,
0644);
if (os == NULL)
return -1;
@ -1344,8 +1357,8 @@ int apk_db_write_config(struct apk_database *db)
return r;
os = apk_ostream_to_file(db->root_fd,
"var/lib/apk/installed",
"var/lib/apk/installed.new",
apk_installed_file,
apk_installed_file_tmp,
0644);
if (os == NULL)
return -1;
@ -1355,8 +1368,8 @@ int apk_db_write_config(struct apk_database *db)
return r;
os = apk_ostream_to_file(db->root_fd,
"var/lib/apk/scripts.tar",
"var/lib/apk/scripts.tar.new",
apk_scripts_file,
apk_scripts_file_tmp,
0644);
if (os == NULL)
return -1;
@ -1365,12 +1378,11 @@ int apk_db_write_config(struct apk_database *db)
if (r < 0)
return r;
unlinkat(db->root_fd, "var/lib/apk/scripts", 0);
apk_db_index_write_nr_cache(db);
os = apk_ostream_to_file(db->root_fd,
"var/lib/apk/triggers",
"var/lib/apk/triggers.new",
apk_triggers_file,
apk_triggers_file_tmp,
0644);
if (os == NULL)
return -1;

31
src/io.c
View File

@ -739,6 +739,37 @@ size_t apk_ostream_write_string(struct apk_ostream *os, const char *string)
return len;
}
int apk_move_file(int atfd, const char *from, const char *to)
{
struct apk_istream *is;
struct stat64 st;
int rc, tofd;
if (renameat(atfd, from, atfd, to) == 0)
return 0;
if (fstatat64(atfd, from, &st, 0) != 0)
return -errno;
is = apk_istream_from_file(atfd, from);
if (is == NULL)
return -ENOENT;
tofd = openat(atfd, to, O_CREAT | O_RDWR | O_TRUNC | O_CLOEXEC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (tofd < 0) {
rc = -errno;
goto close_is;
}
rc = apk_istream_splice(is, tofd, st.st_size, NULL, NULL);
close(tofd);
unlinkat(atfd, from, 0);
close_is:
is->close(is);
return rc;
}
struct cache_item {
apk_hash_node hash_node;
unsigned int genid;