os.c File Reference

#include <config.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <syslog.h>
#include <unistd.h>
#include <isc/buffer.h>
#include <isc/file.h>
#include <isc/print.h>
#include <isc/resource.h>
#include <isc/result.h>
#include <isc/strerror.h>
#include <isc/string.h>
#include <named/main.h>
#include <named/os.h>

Go to the source code of this file.

Defines
#define	ISC_FACILITY   LOG_DAEMON
Functions
static void	setup_syslog (const char *progname)
void	ns_os_init (const char *progname)
void	ns_os_daemonize (void)
void	ns_os_started (void)
void	ns_os_opendevnull (void)
void	ns_os_closedevnull (void)
static isc_boolean_t	all_digits (const char *s)
void	ns_os_chroot (const char *root)
void	ns_os_inituserinfo (const char *username)
void	ns_os_changeuser (void)
void	ns_os_adjustnofile (void)
void	ns_os_minprivs (void)
static int	safe_open (const char *filename, mode_t mode, isc_boolean_t append)
static void	cleanup_pidfile (void)
static void	cleanup_lockfile (void)
static int	mkdirpath (char *filename, void(*report)(const char *,...))
static void	setperms (uid_t uid, gid_t gid)
FILE *	ns_os_openfile (const char *filename, mode_t mode, isc_boolean_t switch_user)
void	ns_os_writepidfile (const char *filename, isc_boolean_t first_time)
isc_boolean_t	ns_os_issingleton (const char *filename)
void	ns_os_shutdown (void)
isc_result_t	ns_os_gethostname (char *buf, size_t len)
static char *	next_token (char **stringp, const char *delim)
void	ns_os_shutdownmsg (char *command, isc_buffer_t *text)
void	ns_os_tzset (void)
Variables
static char *	pidfile = NULL
static char *	lockfile = NULL
static int	devnullfd = -1
static int	singletonfd = -1
static struct passwd *	runas_pw = NULL
static isc_boolean_t	done_setuid = ISC_FALSE
static int	dfd [2] = { -1, -1 }

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Detailed Description

Definition in file os.c.

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Define Documentation

#define ISC_FACILITY   LOG_DAEMON

Definition at line 60 of file os.c.

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Function Documentation

static void setup_syslog

(

const char *

progname

)

[static]

Definition at line 371 of file os.c.

References ISC_FACILITY, and isc_file_basename().

Referenced by ns_os_init().

void ns_os_init

(

const char *

progname

)

Definition at line 382 of file os.c.

References setup_syslog().

Referenced by main().

void ns_os_daemonize

(

void

)

Definition at line 396 of file os.c.

References devnullfd, dfd, isc__strerror(), ISC_STRERRORSIZE, and ns_main_earlyfatal().

Referenced by setup().

void ns_os_started

(

void

)

Definition at line 468 of file os.c.

References dfd, and ns_main_earlyfatal().

Referenced by view_loaded().

void ns_os_opendevnull

(

void

)

Definition at line 484 of file os.c.

References devnullfd.

Referenced by setup().

void ns_os_closedevnull

(

void

)

Definition at line 489 of file os.c.

References devnullfd.

Referenced by main().

static isc_boolean_t all_digits

(

const char *

s

)

[static]

Definition at line 499 of file os.c.

References ISC_FALSE, and ISC_TRUE.

Referenced by ns_os_inituserinfo().

void ns_os_chroot

(

const char *

root

)

Definition at line 511 of file os.c.

References isc__strerror(), ISC_STRERRORSIZE, and ns_main_earlyfatal().

Referenced by setup().

void ns_os_inituserinfo

(

const char *

username

)

Definition at line 537 of file os.c.

References all_digits(), isc__strerror(), ISC_STRERRORSIZE, ns_main_earlyfatal(), and runas_pw.

Referenced by setup().

void ns_os_changeuser

(

void

)

Definition at line 561 of file os.c.

References done_setuid, isc__strerror(), ISC_STRERRORSIZE, ISC_TRUE, ns_main_earlyfatal(), ns_main_earlywarning(), and runas_pw.

Referenced by load_configuration(), and ns_os_minprivs().

void ns_os_adjustnofile

(

void

)

Definition at line 608 of file os.c.

References ISC_R_SUCCESS, isc_resource_openfiles, isc_resource_setlimit(), ISC_RESOURCE_UNLIMITED, and ns_main_earlywarning().

Referenced by setup().

void ns_os_minprivs

(

void

)

Definition at line 626 of file os.c.

References ns_os_changeuser().

Referenced by setup().

static int safe_open	(	const char *	filename,
		mode_t	mode,
		isc_boolean_t	append
	)			[static]

Definition at line 641 of file os.c.

Referenced by ns_os_openfile().

static void cleanup_pidfile

(

void

)

[static]

Definition at line 664 of file os.c.

References free(), ns_main_earlywarning(), and pidfile.

static void cleanup_lockfile

(

void

)

[static]

Definition at line 676 of file os.c.

References free(), lockfile, ns_main_earlywarning(), and singletonfd.

static int mkdirpath	(	char *	filename,
		void(*)(const char *,...)	report
	)			[static]

Definition at line 697 of file os.c.

References error(), isc__strerror(), ISC_STRERRORSIZE, report(), and runas_pw.

Referenced by ns_os_openfile().

static void setperms	(	uid_t	uid,
		gid_t	gid
	)			[static]

Definition at line 751 of file os.c.

References isc__strerror(), ISC_STRERRORSIZE, and ns_main_earlywarning().

Referenced by ns_os_openfile().

FILE* ns_os_openfile	(	const char *	filename,
		mode_t	mode,
		isc_boolean_t	switch_user
	)

Definition at line 793 of file os.c.

References free(), isc__strerror(), ISC_FALSE, ISC_STRERRORSIZE, mkdirpath(), ns_main_earlywarning(), runas_pw, safe_open(), setperms(), and strdup().

Referenced by generate_session_key().

void ns_os_writepidfile	(	const char *	filename,
		isc_boolean_t	first_time
	)

Definition at line 871 of file os.c.

Referenced by load_configuration().

isc_boolean_t ns_os_issingleton

(

const char *

filename

)

Definition at line 922 of file os.c.

Referenced by check_lockfile().

void ns_os_shutdown

(

void

)

Definition at line 977 of file os.c.

Referenced by fatal(), and main().

isc_result_t ns_os_gethostname	(	char *	buf,
		size_t	len
	)

Definition at line 984 of file os.c.

Referenced by do_hostname_lookup(), do_id_lookup(), and ns_client_addopt().

static char* next_token	(	char **	stringp,
		const char *	delim
	)			[static]

Definition at line 992 of file os.c.

void ns_os_shutdownmsg	(	char *	command,
		isc_buffer_t *	text
	)

Definition at line 1004 of file os.c.

Referenced by ns_control_docommand().

void ns_os_tzset

(

void

)

Definition at line 1038 of file os.c.

Referenced by setup().

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Variable Documentation

char* pidfile = NULL [static]

Definition at line 54 of file os.c.

Referenced by cleanup_pidfile().

char* lockfile = NULL [static]

Definition at line 55 of file os.c.

Referenced by cleanup_lockfile().

int devnullfd = -1 [static]

Definition at line 56 of file os.c.

Referenced by ns_os_closedevnull(), ns_os_daemonize(), and ns_os_opendevnull().

int singletonfd = -1 [static]

Definition at line 57 of file os.c.

Referenced by cleanup_lockfile().

struct passwd* runas_pw = NULL [static]

Definition at line 111 of file os.c.

Referenced by mkdirpath(), ns_os_changeuser(), ns_os_inituserinfo(), and ns_os_openfile().

isc_boolean_t done_setuid = ISC_FALSE [static]

Definition at line 112 of file os.c.

Referenced by ns_os_changeuser().

int dfd[2] = { -1, -1 } [static]

Definition at line 113 of file os.c.

Referenced by ns_os_daemonize(), and ns_os_started().

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