main.c File Reference

CNID DBD (Database Daemon) Backend startup routines. More...

#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/file.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <bstrlib.h>
#include <atalk/cnid_bdb_private.h>
#include <atalk/errchk.h>
#include <atalk/logger.h>
#include <atalk/netatalk_conf.h>
#include <atalk/util.h>
#include "db_param.h"
#include "dbd.h"
#include "dbif.h"
#include "pack.h"
#include "comm.h"

Macros
#define	DBOPTIONS   (DB_CREATE | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN)

Functions
static void	sig_exit (int signo)
static void	block_sigs_onoff (int block)
static int	get_lock (int cmd, const char *dbpath)
	Get lock on db lock file.
static int	open_db (void)
static int	delete_db (void)
static int	reinit_db (void)
	Close dbd if open, delete it, reopen.
static int	loop (struct db_param *dbp)
static void	switch_to_user (char *dir)
static void	set_signal (void)
static uid_t	uid_from_name (const char *name)
int	main (int argc, char *argv[])

Variables
static DBD *	dbd
static int	exit_sig = 0
static int	db_locked
static bstring	dbpath
static struct db_param *	dbp
static struct vol *	vol

Detailed Description

CNID DBD (Database Daemon) Backend startup routines.

The dbd_XXX and comm_XXX functions all obey the same protocol for return values:

• 1: Success, if transactions are used commit.
• 0: Failure, but we continue to serve requests. If transactions are used abort/rollback.
• -1: Fatal error, either from the database or from the socket. Abort the transaction if applicable (which might fail as well) and then exit.

We always try to notify the client process about the outcome, the result field of the cnid_dbd_rply structure contains further details.

Macro Definition Documentation

DBOPTIONS

#define DBOPTIONS   (DB_CREATE | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN)

Function Documentation

block_sigs_onoff()

static void block_sigs_onoff ( int  block )

static

delete_db()

static int delete_db ( void  )

static

get_lock()

static int get_lock ( int  cmd, const char *  dbpath  )

static

Get lock on db lock file.

Parameters

[in]	cmd	lock command: LOCK_FREE: close lockfd LOCK_UNLOCK: unlock lockm keep lockfd open LOCK_EXCL: F_WRLCK on lockfd LOCK_SHRD: F_RDLCK on lockfd
[in]	dbpath	path to lockfile, only used on first call, later the stored fd is used

Returns

depending on lock command:

• LOCK_FREE/LOCK_UNLOCK return 0 on success, -1 on error
• LOCK_EXCL/LOCK_SHRD return LOCK_EXCL or LOCK_SHRD respectively on success, 0 if the lock couldn't be acquired, -1 on other errors

loop()

static int loop ( struct db_param *  dbp )

static

main()

int main	(	int	argc,
		char *	argv[]
	)

open_db()

static int open_db ( void  )

static

reinit_db()

static int reinit_db ( void  )

static

Close dbd if open, delete it, reopen.

Also tries to copy the rootinfo key, that would allow for keeping the db stamp and last used CNID

set_signal()

static void set_signal ( void  )

static

sig_exit()

static void sig_exit ( int  signo )

static

switch_to_user()

static void switch_to_user ( char *  dir )

static

uid_from_name()

static uid_t uid_from_name ( const char *  name )

static

Variable Documentation

db_locked

int db_locked

static

dbd

DBD* dbd

static

dbp

struct db_param* dbp

static

dbpath

bstring dbpath

static

exit_sig

int exit_sig = 0

static

vol

struct vol* vol

static