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database.c
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database.c
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/* This file is part of "reprepro"
* Copyright (C) 2007,2008,2016 Bernhard R. Link
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 St, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <assert.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <db.h>
#include "globals.h"
#include "error.h"
#include "ignore.h"
#include "strlist.h"
#include "names.h"
#include "database.h"
#include "dirs.h"
#include "filecntl.h"
#include "files.h"
#include "filelist.h"
#include "reference.h"
#include "tracking.h"
#include "dpkgversions.h"
#include "distribution.h"
#include "database_p.h"
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define LIBDB_VERSION_STRING "bdb" TOSTRING(DB_VERSION_MAJOR) "." TOSTRING(DB_VERSION_MINOR) "." TOSTRING(DB_VERSION_PATCH)
#define CLEARDBT(dbt) { memset(&dbt, 0, sizeof(dbt)); }
#define SETDBT(dbt, datastr) {const char *my = datastr; memset(&dbt, 0, sizeof(dbt)); dbt.data = (void *)my; dbt.size = strlen(my) + 1;}
#define SETDBTl(dbt, datastr, datasize) {const char *my = datastr; memset(&dbt, 0, sizeof(dbt)); dbt.data = (void *)my; dbt.size = datasize;}
static bool rdb_initialized, rdb_used, rdb_locked, rdb_verbose;
static int rdb_dircreationdepth;
static bool rdb_nopackages, rdb_readonly;
static bool rdb_packagesdatabaseopen;
static bool rdb_trackingdatabaseopen;
static /*@null@*/ char *rdb_version, *rdb_lastsupportedversion,
*rdb_dbversion, *rdb_lastsupporteddbversion;
struct table *rdb_checksums, *rdb_contents;
struct table *rdb_references;
static struct {
bool createnewtables;
} rdb_capabilities;
static void database_free(void) {
if (!rdb_initialized)
return;
free(rdb_version);
rdb_version = NULL;
free(rdb_lastsupportedversion);
rdb_lastsupportedversion = NULL;
free(rdb_dbversion);
rdb_dbversion = NULL;
free(rdb_lastsupporteddbversion);
rdb_lastsupporteddbversion = NULL;
rdb_initialized = false;
}
static inline char *dbfilename(const char *filename) {
return calc_dirconcat(global.dbdir, filename);
}
/**********************/
/* lock file handling */
/**********************/
static retvalue database_lock(size_t waitforlock) {
char *lockfile;
int fd;
retvalue r;
size_t tries = 0;
assert (!rdb_locked);
rdb_dircreationdepth = 0;
r = dir_create_needed(global.dbdir, &rdb_dircreationdepth);
if (RET_WAS_ERROR(r))
return r;
lockfile = dbfilename("lockfile");
if (FAILEDTOALLOC(lockfile))
return RET_ERROR_OOM;
fd = open(lockfile, O_WRONLY|O_CREAT|O_EXCL|O_NOFOLLOW|O_NOCTTY,
S_IRUSR|S_IWUSR);
while (fd < 0) {
int e = errno;
if (e == EEXIST) {
if (tries < waitforlock && ! interrupted()) {
unsigned int timetosleep = 10;
if (verbose >= 0)
printf(
"Could not acquire lock: %s already exists!\nWaiting 10 seconds before trying again.\n",
lockfile);
while (timetosleep > 0)
timetosleep = sleep(timetosleep);
tries++;
fd = open(lockfile, O_WRONLY|O_CREAT|O_EXCL
|O_NOFOLLOW|O_NOCTTY,
S_IRUSR|S_IWUSR);
continue;
}
fprintf(stderr,
"The lock file '%s' already exists. There might be another instance with the\n"
"same database dir running. To avoid locking overhead, only one process\n"
"can access the database at the same time. Do not delete the lock file unless\n"
"you are sure no other version is still running!\n", lockfile);
} else
fprintf(stderr,
"Error %d creating lock file '%s': %s!\n",
e, lockfile, strerror(e));
free(lockfile);
return RET_ERRNO(e);
}
// TODO: do some more locking of this file to avoid problems
// with the non-atomity of O_EXCL with nfs-filesystems...
if (close(fd) != 0) {
int e = errno;
fprintf(stderr,
"(Late) Error %d creating lock file '%s': %s!\n",
e, lockfile, strerror(e));
(void)unlink(lockfile);
free(lockfile);
return RET_ERRNO(e);
}
free(lockfile);
rdb_locked = true;
return RET_OK;
}
static void releaselock(void) {
char *lockfile;
assert (rdb_locked);
lockfile = dbfilename("lockfile");
if (lockfile == NULL)
return;
if (unlink(lockfile) != 0) {
int e = errno;
fprintf(stderr, "Error %d deleting lock file '%s': %s!\n",
e, lockfile, strerror(e));
(void)unlink(lockfile);
}
free(lockfile);
dir_remove_new(global.dbdir, rdb_dircreationdepth);
rdb_locked = false;
}
static retvalue writeversionfile(void);
retvalue database_close(void) {
retvalue result = RET_OK, r;
if (rdb_references != NULL) {
r = table_close(rdb_references);
RET_UPDATE(result, r);
rdb_references = NULL;
}
if (rdb_checksums != NULL) {
r = table_close(rdb_checksums);
RET_UPDATE(result, r);
rdb_checksums = NULL;
}
if (rdb_contents != NULL) {
r = table_close(rdb_contents);
RET_UPDATE(result, r);
rdb_contents = NULL;
}
r = writeversionfile();
RET_UPDATE(result, r);
if (rdb_locked)
releaselock();
database_free();
return result;
}
static retvalue database_hasdatabasefile(const char *filename, /*@out@*/bool *exists_p) {
char *fullfilename;
fullfilename = dbfilename(filename);
if (FAILEDTOALLOC(fullfilename))
return RET_ERROR_OOM;
*exists_p = isregularfile(fullfilename);
free(fullfilename);
return RET_OK;
}
enum database_type {
dbt_QUERY,
dbt_BTREE, dbt_BTREEDUP, dbt_BTREEPAIRS,
dbt_HASH,
dbt_COUNT /* must be last */
};
static const uint32_t types[dbt_COUNT] = {
DB_UNKNOWN,
DB_BTREE, DB_BTREE, DB_BTREE,
DB_HASH
};
#if DB_VERSION_MAJOR >= 6
static int paireddatacompare(UNUSED(DB *db), const DBT *a, const DBT *b, size_t *locp);
#else
static int paireddatacompare(UNUSED(DB *db), const DBT *a, const DBT *b);
#endif
static retvalue database_opentable(const char *filename, /*@null@*/const char *subtable, enum database_type type, uint32_t flags, /*@out@*/DB **result) {
char *fullfilename;
DB *table;
int dbret;
fullfilename = dbfilename(filename);
if (FAILEDTOALLOC(fullfilename))
return RET_ERROR_OOM;
dbret = db_create(&table, NULL, 0);
if (dbret != 0) {
fprintf(stderr, "db_create: %s\n", db_strerror(dbret));
free(fullfilename);
return RET_DBERR(dbret);
}
if (type == dbt_BTREEDUP || type == dbt_BTREEPAIRS) {
dbret = table->set_flags(table, DB_DUPSORT);
if (dbret != 0) {
table->err(table, dbret, "db_set_flags(DB_DUPSORT):");
(void)table->close(table, 0);
free(fullfilename);
return RET_DBERR(dbret);
}
}
if (type == dbt_BTREEPAIRS) {
dbret = table->set_dup_compare(table, paireddatacompare);
if (dbret != 0) {
table->err(table, dbret, "db_set_dup_compare:");
(void)table->close(table, 0);
free(fullfilename);
return RET_DBERR(dbret);
}
}
#if DB_VERSION_MAJOR == 5 || DB_VERSION_MAJOR == 6
#define DB_OPEN(database, filename, name, type, flags) \
database->open(database, NULL, filename, name, type, flags, 0664)
#else
#if DB_VERSION_MAJOR == 4
#define DB_OPEN(database, filename, name, type, flags) \
database->open(database, NULL, filename, name, type, flags, 0664)
#else
#if DB_VERSION_MAJOR == 3
#define DB_OPEN(database, filename, name, type, flags) \
database->open(database, filename, name, type, flags, 0664)
#else
#error Unexpected DB_VERSION_MAJOR!
#endif
#endif
#endif
dbret = DB_OPEN(table, fullfilename, subtable, types[type], flags);
if (dbret == ENOENT && !ISSET(flags, DB_CREATE)) {
(void)table->close(table, 0);
free(fullfilename);
return RET_NOTHING;
}
if (dbret != 0) {
if (subtable != NULL)
table->err(table, dbret, "db_open(%s:%s)[%d]",
fullfilename, subtable, dbret);
else
table->err(table, dbret, "db_open(%s)[%d]",
fullfilename, dbret);
(void)table->close(table, 0);
free(fullfilename);
return RET_DBERR(dbret);
}
free(fullfilename);
*result = table;
return RET_OK;
}
retvalue database_listsubtables(const char *filename, struct strlist *result) {
DB *table;
DBC *cursor;
DBT key, data;
int dbret;
retvalue ret, r;
struct strlist ids;
r = database_opentable(filename, NULL,
dbt_QUERY, DB_RDONLY, &table);
if (!RET_IS_OK(r))
return r;
cursor = NULL;
if ((dbret = table->cursor(table, NULL, &cursor, 0)) != 0) {
table->err(table, dbret, "cursor(%s):", filename);
(void)table->close(table, 0);
return RET_ERROR;
}
CLEARDBT(key);
CLEARDBT(data);
strlist_init(&ids);
ret = RET_NOTHING;
while ((dbret=cursor->c_get(cursor, &key, &data, DB_NEXT)) == 0) {
char *identifier = strndup(key.data, key.size);
if (FAILEDTOALLOC(identifier)) {
(void)table->close(table, 0);
strlist_done(&ids);
return RET_ERROR_OOM;
}
r = strlist_add(&ids, identifier);
if (RET_WAS_ERROR(r)) {
(void)table->close(table, 0);
strlist_done(&ids);
return r;
}
ret = RET_OK;
CLEARDBT(key);
CLEARDBT(data);
}
if (dbret != 0 && dbret != DB_NOTFOUND) {
table->err(table, dbret, "c_get(%s):", filename);
(void)table->close(table, 0);
strlist_done(&ids);
return RET_DBERR(dbret);
}
if ((dbret = cursor->c_close(cursor)) != 0) {
table->err(table, dbret, "c_close(%s):", filename);
(void)table->close(table, 0);
strlist_done(&ids);
return RET_DBERR(dbret);
}
dbret = table->close(table, 0);
if (dbret != 0) {
table->err(table, dbret, "close(%s):", filename);
strlist_done(&ids);
return RET_DBERR(dbret);
} else {
strlist_move(result, &ids);
return ret;
}
}
retvalue database_dropsubtable(const char *table, const char *subtable) {
char *filename;
DB *db;
int dbret;
filename = dbfilename(table);
if (FAILEDTOALLOC(filename))
return RET_ERROR_OOM;
if ((dbret = db_create(&db, NULL, 0)) != 0) {
fprintf(stderr, "db_create: %s %s\n",
filename, db_strerror(dbret));
free(filename);
return RET_DBERR(dbret);
}
dbret = db->remove(db, filename, subtable, 0);
if (dbret == ENOENT) {
free(filename);
return RET_NOTHING;
}
if (dbret != 0) {
fprintf(stderr, "Error removing '%s' from %s!\n",
subtable, filename);
free(filename);
return RET_DBERR(dbret);
}
free(filename);
return RET_OK;
}
static inline bool targetisdefined(const char *identifier, struct distribution *distributions) {
struct distribution *d;
struct target *t;
for (d = distributions ; d != NULL ; d = d->next) {
for (t = d->targets; t != NULL ; t = t->next) {
if (strcmp(t->identifier, identifier) == 0) {
t->existed = true;
return true;
}
}
}
return false;
}
static retvalue warnidentifiers(const struct strlist *identifiers, struct distribution *distributions, bool readonly) {
struct distribution *d;
struct target *t;
const char *identifier;
retvalue r;
int i;
for (i = 0; i < identifiers->count ; i++) {
identifier = identifiers->values[i];
if (targetisdefined(identifier, distributions))
continue;
fprintf(stderr,
"Error: packages database contains unused '%s' database.\n", identifier);
if (ignored[IGN_undefinedtarget] == 0) {
(void)fputs(
"This usually means you removed some component, architecture or even\n"
"a whole distribution from conf/distributions.\n"
"In that case you most likely want to call reprepro clearvanished to get rid\n"
"of the databases belonging to those removed parts.\n"
"(Another reason to get this error is using conf/ and db/ directories\n"
" belonging to different reprepro repositories).\n",
stderr);
}
if (IGNORABLE(undefinedtarget)) {
(void)fputs(
"Ignoring as --ignore=undefinedtarget given.\n",
stderr);
ignored[IGN_undefinedtarget]++;
continue;
}
(void)fputs(
"To ignore use --ignore=undefinedtarget.\n",
stderr);
return RET_ERROR;
}
if (readonly)
return RET_OK;
for (d = distributions ; d != NULL ; d = d->next) {
bool architecture_existed[d->architectures.count];
bool have_old = false;
/* check for new architectures */
memset(architecture_existed, 0, sizeof(architecture_existed));
for (t = d->targets; t != NULL ; t = t->next) {
int o;
if (!t->existed)
continue;
o = atomlist_ofs(&d->architectures,
t->architecture);
assert (o >= 0);
if (o >= 0) {
architecture_existed[o] = true;
/* only warn about new ones if there
* is at least one old one, otherwise
* it's just a new distribution */
have_old = true;
}
}
for (i = 0 ; have_old && i < d->architectures.count ; i++) {
architecture_t a;
if (architecture_existed[i])
continue;
a = d->architectures.atoms[i];
fprintf(stderr,
"New architecture '%s' in '%s'. Perhaps you want to call\n"
"reprepro flood '%s' '%s'\n"
"to populate it with architecture 'all' packages from other architectures.\n",
atoms_architectures[a], d->codename,
d->codename, atoms_architectures[a]);
}
/* create databases, so we know next time what is new */
for (t = d->targets; t != NULL ; t = t->next) {
if (t->existed)
continue;
/* create database now, to test it can be created
* early, and to know when new architectures
* arrive in the future. */
r = target_initpackagesdb(t, READWRITE);
if (RET_WAS_ERROR(r))
return r;
r = target_closepackagesdb(t);
if (RET_WAS_ERROR(r))
return r;
}
}
return RET_OK;
}
static retvalue warnunusedtracking(const struct strlist *codenames, const struct distribution *distributions) {
const char *codename;
const struct distribution *d;
int i;
for (i = 0; i < codenames->count ; i++) {
codename = codenames->values[i];
d = distributions;
while (d != NULL && strcmp(d->codename, codename) != 0)
d = d->next;
if (d != NULL && d->tracking != dt_NONE)
continue;
fprintf(stderr,
"Error: tracking database contains unused '%s' database.\n", codename);
if (ignored[IGN_undefinedtracking] == 0) {
if (d == NULL)
(void)fputs(
"This either means you removed a distribution from the distributions config\n"
"file without calling clearvanished (or at least removealltracks), you\n"
"experienced a bug in retrack in versions < 3.0.0, you found a new bug or your\n"
"config does not belong to this database.\n",
stderr);
else
(void)fputs(
"This either means you removed the Tracking: options from this distribution without\n"
"calling removealltracks for it, or your config does not belong to this database.\n",
stderr);
}
if (IGNORABLE(undefinedtracking)) {
(void)fputs(
"Ignoring as --ignore=undefinedtracking given.\n",
stderr);
ignored[IGN_undefinedtracking]++;
continue;
}
(void)fputs("To ignore use --ignore=undefinedtracking.\n",
stderr);
return RET_ERROR;
}
return RET_OK;
}
static retvalue readline(/*@out@*/char **result, FILE *f, const char *versionfilename) {
char buffer[21];
size_t l;
if (fgets(buffer, 20, f) == NULL) {
int e = errno;
if (e == 0) {
fprintf(stderr,
"Error reading '%s': unexpected empty file\n",
versionfilename);
return RET_ERROR;
} else {
fprintf(stderr, "Error reading '%s': %s(errno is %d)\n",
versionfilename, strerror(e), e);
return RET_ERRNO(e);
}
}
l = strlen(buffer);
while (l > 0 && (buffer[l-1] == '\r' || buffer[l-1] == '\n')) {
buffer[--l] = '\0';
}
if (l == 0) {
fprintf(stderr, "Error reading '%s': unexpected empty line.\n",
versionfilename);
return RET_ERROR;
}
*result = strdup(buffer);
if (FAILEDTOALLOC(*result))
return RET_ERROR_OOM;
return RET_OK;
}
static retvalue readversionfile(bool nopackagesyet) {
char *versionfilename;
FILE *f;
retvalue r;
int c;
versionfilename = dbfilename("version");
if (FAILEDTOALLOC(versionfilename))
return RET_ERROR_OOM;
f = fopen(versionfilename, "r");
if (f == NULL) {
int e = errno;
if (e != ENOENT) {
fprintf(stderr, "Error opening '%s': %s(errno is %d)\n",
versionfilename, strerror(e), e);
free(versionfilename);
return RET_ERRNO(e);
}
free(versionfilename);
if (nopackagesyet) {
/* set to default for new packages.db files: */
rdb_version = strdup(VERSION);
if (FAILEDTOALLOC(rdb_version))
return RET_ERROR_OOM;
rdb_capabilities.createnewtables = true;
} else
rdb_version = NULL;
rdb_lastsupportedversion = NULL;
rdb_dbversion = NULL;
rdb_lastsupporteddbversion = NULL;
return RET_NOTHING;
}
/* first line is the version creating this database */
r = readline(&rdb_version, f, versionfilename);
if (RET_WAS_ERROR(r)) {
(void)fclose(f);
free(versionfilename);
return r;
}
/* second line says which versions of reprepro will be able to cope
* with this database */
r = readline(&rdb_lastsupportedversion, f, versionfilename);
if (RET_WAS_ERROR(r)) {
(void)fclose(f);
free(versionfilename);
return r;
}
/* next line is the version of the underlying database library */
r = readline(&rdb_dbversion, f, versionfilename);
if (RET_WAS_ERROR(r)) {
(void)fclose(f);
free(versionfilename);
return r;
}
/* and then the minimum version of this library needed. */
r = readline(&rdb_lastsupporteddbversion, f, versionfilename);
if (RET_WAS_ERROR(r)) {
(void)fclose(f);
free(versionfilename);
return r;
}
(void)fclose(f);
free(versionfilename);
/* check for enabled capabilities in the version */
r = dpkgversions_cmp(rdb_version, "3", &c);
if (RET_WAS_ERROR(r))
return r;
if (c >= 0)
rdb_capabilities.createnewtables = true;
/* ensure we can understand it */
r = dpkgversions_cmp(VERSION, rdb_lastsupportedversion, &c);
if (RET_WAS_ERROR(r))
return r;
if (c < 0) {
fprintf(stderr,
"According to %s/version this database was created with a future version\n"
"and uses features this version cannot understand. Aborting...\n",
global.dbdir);
return RET_ERROR;
}
/* ensure it's a libdb database: */
if (strncmp(rdb_dbversion, "bdb", 3) != 0) {
fprintf(stderr,
"According to %s/version this database was created with a yet unsupported\n"
"database library. Aborting...\n",
global.dbdir);
return RET_ERROR;
}
if (strncmp(rdb_lastsupporteddbversion, "bdb", 3) != 0) {
fprintf(stderr,
"According to %s/version this database was created with a yet unsupported\n"
"database library. Aborting...\n",
global.dbdir);
return RET_ERROR;
}
r = dpkgversions_cmp(LIBDB_VERSION_STRING,
rdb_lastsupporteddbversion, &c);
if (RET_WAS_ERROR(r))
return r;
if (c < 0) {
fprintf(stderr,
"According to %s/version this database was created with a future version\n"
"%s of libdb. The libdb version this binary is linked against cannot yet\n"
"handle this format. Aborting...\n",
global.dbdir, rdb_dbversion + 3);
return RET_ERROR;
}
return RET_OK;
}
static retvalue writeversionfile(void) {
char *versionfilename, *finalversionfilename;
FILE *f;
int i, e;
versionfilename = dbfilename("version.new");
if (FAILEDTOALLOC(versionfilename))
return RET_ERROR_OOM;
f = fopen(versionfilename, "w");
if (f == NULL) {
e = errno;
fprintf(stderr, "Error creating '%s': %s(errno is %d)\n",
versionfilename, strerror(e), e);
free(versionfilename);
return RET_ERRNO(e);
}
if (rdb_version == NULL)
(void)fputs("0\n", f);
else {
(void)fputs(rdb_version, f);
(void)fputc('\n', f);
}
if (rdb_lastsupportedversion == NULL) {
(void)fputs("3.3.0\n", f);
} else {
int c;
retvalue r;
r = dpkgversions_cmp(rdb_lastsupportedversion,
"3.3.0", &c);
if (!RET_IS_OK(r) || c < 0)
(void)fputs("3.3.0\n", f);
else {
(void)fputs(rdb_lastsupportedversion, f);
(void)fputc('\n', f);
}
}
if (rdb_dbversion == NULL)
fprintf(f, "bdb%d.%d.%d\n", DB_VERSION_MAJOR, DB_VERSION_MINOR,
DB_VERSION_PATCH);
else {
(void)fputs(rdb_dbversion, f);
(void)fputc('\n', f);
}
if (rdb_lastsupporteddbversion == NULL)
fprintf(f, "bdb%d.%d.0\n", DB_VERSION_MAJOR, DB_VERSION_MINOR);
else {
(void)fputs(rdb_lastsupporteddbversion, f);
(void)fputc('\n', f);
}
e = ferror(f);
if (e != 0) {
fprintf(stderr, "Error writing '%s': %s(errno is %d)\n",
versionfilename, strerror(e), e);
(void)fclose(f);
unlink(versionfilename);
free(versionfilename);
return RET_ERRNO(e);
}
if (fclose(f) != 0) {
e = errno;
fprintf(stderr, "Error writing '%s': %s(errno is %d)\n",
versionfilename, strerror(e), e);
unlink(versionfilename);
free(versionfilename);
return RET_ERRNO(e);
}
finalversionfilename = dbfilename("version");
if (FAILEDTOALLOC(finalversionfilename)) {
unlink(versionfilename);
free(versionfilename);
return RET_ERROR_OOM;
}
i = rename(versionfilename, finalversionfilename);
if (i != 0) {
e = errno;
fprintf(stderr, "Error %d moving '%s' to '%s': %s\n",
e, versionfilename, finalversionfilename,
strerror(e));
(void)unlink(versionfilename);
free(versionfilename);
free(finalversionfilename);
return RET_ERRNO(e);
}
free(finalversionfilename);
free(versionfilename);
return RET_OK;
}
static retvalue createnewdatabase(struct distribution *distributions) {
struct distribution *d;
struct target *t;
retvalue result = RET_NOTHING, r;
for (d = distributions ; d != NULL ; d = d->next) {
for (t = d->targets ; t != NULL ; t = t->next) {
r = target_initpackagesdb(t, READWRITE);
RET_UPDATE(result, r);
if (RET_IS_OK(r)) {
r = target_closepackagesdb(t);
RET_UPDATE(result, r);
}
}
}
r = writeversionfile();
RET_UPDATE(result, r);
return result;
}
/* Initialize a database.
* - if not fast, make all kind of checks for consistency (TO BE IMPLEMENTED),
* - if readonly, do not create but return with RET_NOTHING
* - lock database, waiting a given amount of time if already locked
*/
retvalue database_create(struct distribution *alldistributions, bool fast, bool nopackages, bool allowunused, bool readonly, size_t waitforlock, bool verbosedb) {
retvalue r;
bool packagesfileexists, trackingfileexists, nopackagesyet;
if (rdb_initialized || rdb_used) {
fputs("Internal Error: database initialized a 2nd time!\n",
stderr);
return RET_ERROR_INTERNAL;
}
if (readonly && !isdir(global.dbdir)) {
if (verbose >= 0)
fprintf(stderr,
"Exiting without doing anything, as there is no database yet that could result in other actions.\n");
return RET_NOTHING;
}
rdb_initialized = true;
rdb_used = true;
r = database_lock(waitforlock);
assert (r != RET_NOTHING);
if (!RET_IS_OK(r)) {
database_free();
return r;
}
rdb_readonly = readonly;
rdb_verbose = verbosedb;
r = database_hasdatabasefile("packages.db", &packagesfileexists);
if (RET_WAS_ERROR(r)) {
releaselock();
database_free();
return r;
}
r = database_hasdatabasefile("tracking.db", &trackingfileexists);
if (RET_WAS_ERROR(r)) {
releaselock();
database_free();
return r;
}
nopackagesyet = !packagesfileexists && !trackingfileexists;
r = readversionfile(nopackagesyet);
if (RET_WAS_ERROR(r)) {
releaselock();
database_free();
return r;
}
if (nopackages) {
rdb_nopackages = true;
return RET_OK;
}
if (nopackagesyet) {
// TODO: handle readonly, but only once packages files may no
// longer be generated when it is active...
r = createnewdatabase(alldistributions);
if (RET_WAS_ERROR(r)) {
database_close();
return r;
}
}
/* after this point we should call database_close,
* as other stuff was handled,
* so writing the version file cannot harm (and not doing so could) */
if (!allowunused && !fast && packagesfileexists) {
struct strlist identifiers;
r = database_listpackages(&identifiers);
if (RET_WAS_ERROR(r)) {
database_close();
return r;
}
if (r == RET_NOTHING)
strlist_init(&identifiers);
r = warnidentifiers(&identifiers,
alldistributions, readonly);
if (RET_WAS_ERROR(r)) {
strlist_done(&identifiers);
database_close();
return r;
}
strlist_done(&identifiers);
}
if (!allowunused && !fast && trackingfileexists) {
struct strlist codenames;
r = tracking_listdistributions(&codenames);
if (RET_WAS_ERROR(r)) {
database_close();
return r;
}
if (RET_IS_OK(r)) {
r = warnunusedtracking(&codenames, alldistributions);
if (RET_WAS_ERROR(r)) {
strlist_done(&codenames);
database_close();
return r;
}
strlist_done(&codenames);
}
}
return RET_OK;
}
/****************************************************************************
* Stuff string parts *
****************************************************************************/
static const char databaseerror[] = "Internal error of the underlying BerkeleyDB database:\n";
/****************************************************************************
* Stuff to handle data in tables *
****************************************************************************
There is nothing that cannot be solved by another layer of indirection, except
too many levels of indirection. (Source forgotten) */
struct table {
char *name, *subname;
DB *berkeleydb;
bool *flagreset;
bool readonly, verbose;
};
static void table_printerror(struct table *table, int dbret, const char *action) {
if (table->subname != NULL)
table->berkeleydb->err(table->berkeleydb, dbret,
"%sWithin %s subtable %s at %s",
databaseerror, table->name, table->subname,
action);
else
table->berkeleydb->err(table->berkeleydb, dbret,
"%sWithin %s at %s",
databaseerror, table->name, action);
}
retvalue table_close(struct table *table) {
int dbret;
retvalue result;
if (table == NULL)
return RET_NOTHING;
if (table->flagreset != NULL)
*table->flagreset = false;
if (table->berkeleydb == NULL) {
assert (table->readonly);
dbret = 0;
} else
dbret = table->berkeleydb->close(table->berkeleydb, 0);
if (dbret != 0) {
fprintf(stderr, "db_close(%s, %s): %s\n",
table->name, table->subname,
db_strerror(dbret));
result = RET_DBERR(dbret);
} else
result = RET_OK;
free(table->name);
free(table->subname);
free(table);
return result;
}
retvalue table_getrecord(struct table *table, const char *key, char **data_p, size_t *datalen_p) {
int dbret;
DBT Key, Data;
assert (table != NULL);
if (table->berkeleydb == NULL) {
assert (table->readonly);
return RET_NOTHING;