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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()

void block_sigs_onoff | ( | int | block | ) |
| static

## ◆ delete_db()

int delete_db | ( | void |  | ) |
| static

## ◆ get_lock()

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()

int loop | ( | struct db_param * | dbp | ) |
| static

## ◆ main()

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

## ◆ open_db()

int open_db | ( | void |  | ) |
| static

## ◆ reinit_db()

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()

void set_signal | ( | void |  | ) |
| static

## ◆ sig_exit()

void sig_exit | ( | int | signo | ) |
| static

## ◆ switch_to_user()

void switch_to_user | ( | char * | dir | ) |
| static

## ◆ uid_from_name()

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