unbound.c File Reference

Main program to start the DNS resolver daemon. More...

#include "config.h"
#include "util/log.h"
#include "daemon/daemon.h"
#include "util/config_file.h"
#include "util/storage/slabhash.h"
#include "services/listen_dnsport.h"
#include "services/cache/rrset.h"
#include "services/cache/infra.h"
#include "util/data/msgreply.h"
#include "util/module.h"
#include <signal.h>
#include <fcntl.h>
#include <pwd.h>
#include <sys/resource.h>
#include <event.h>

Functions
static void	usage ()
	print usage.
static void	checkrlimits (struct config_file *cfg)
	check file descriptor count
static void	apply_settings (struct daemon *daemon, struct config_file *cfg, int cmdline_verbose)
	set verbosity, check rlimits, cache settings
static pid_t	readpid (const char *file)
	Read existing pid from pidfile.
static void	writepid (const char *pidfile, pid_t pid)
	write pid to file.
static void	checkoldpid (struct config_file *cfg)
	check old pid file.
static void	detach (struct config_file *cfg)
	detach from command line
static void	do_chroot (struct daemon *daemon, struct config_file *cfg, int debug_mode, char **cfgfile)
	daemonize, drop user priviliges and chroot if needed
static void	run_daemon (char *cfgfile, int cmdline_verbose, int debug_mode)
	Run the daemon.
int	main (int argc, char *argv[])
	main program.
Variables
void *	unbound_start_brk = 0
	global debug value to keep track of heap memory allocation
int	optind
	getopt global, in case header files fail to declare it.
char *	optarg
	getopt global, in case header files fail to declare it.

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Detailed Description

Main program to start the DNS resolver daemon.

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Function Documentation

static void usage

(

)

[static]

print usage.

Referenced by main().

static pid_t readpid

(

const char *

file

)

[static]

Read existing pid from pidfile.

Parameters:

file,:

file name of pid file.

Returns:

: the pid from the file or -1 if none.

References log_err().

Referenced by checkoldpid().

static void writepid	(	const char *	pidfile,
		pid_t	pid
	)			[static]

write pid to file.

Parameters:

	pidfile,:	file name of pid file.
	pid,:	pid to write to file.

References log_err().

Referenced by do_chroot().

static void checkoldpid

(

struct config_file *

cfg

)

[static]

check old pid file.

Parameters:

cfg,:

the config settings

References config_file::chrootdir, log_warn(), config_file::pidfile, and readpid().

Referenced by do_chroot().

static void run_daemon	(	char *	cfgfile,
		int	cmdline_verbose,
		int	debug_mode
	)			[static]

Run the daemon.

Parameters:

	cfgfile,:	the config file name.
	cmdline_verbose,:	verbosity resulting from commandline -v. These increase verbosity as specified in the config file.
	debug_mode,:	if set, do not daemonize.

References apply_settings(), config_file::chrootdir, config_create(), config_delete(), config_read(), daemon_cleanup(), daemon_delete(), daemon_fork(), daemon_init(), daemon_open_shared_ports(), do_chroot(), fatal_exit(), log_init(), log_warn(), config_file::logfile, daemon::need_to_exit, daemon::pidfile, config_file::use_syslog, VERB_ALGO, VERB_OPS, and verbose().

Referenced by main().

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

main program.

Set options given commandline arguments.

Parameters:

	argc,:	number of commandline arguments.
	argv,:	array of commandline arguments.

Returns:

: exit status of the program.

References cfgfile, log_init(), optarg, optind, run_daemon(), unbound_start_brk, usage(), and verbosity.

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Variable Documentation

int optind

getopt global, in case header files fail to declare it.

Referenced by main().

char* optarg

getopt global, in case header files fail to declare it.

Referenced by main().