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/*
* Copyright (C) 1999-2002 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $ISC: os.c,v 1.5.2.3 2002/08/08 19:15:19 mayer Exp $ */
#include <config.h>
#include <stdarg.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <io.h>
#include <process.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <isc/print.h>
#include <isc/result.h>
#include <isc/string.h>
//#include <isc/ntfile.h>
#include <isc/ntpaths.h>
#include <named/main.h>
#include <named/os.h>
#include <named/globals.h>
#include <named/ntservice.h>
static char *pidfile = NULL;
static BOOL Initialized = FALSE;
void
ns_paths_init() {
if (!Initialized)
isc_ntpaths_init();
ns_g_conffile = isc_ntpaths_get(NAMED_CONF_PATH);
lwresd_g_conffile = isc_ntpaths_get(LWRES_CONF_PATH);
lwresd_g_resolvconffile = isc_ntpaths_get(RESOLV_CONF_PATH);
ns_g_conffile = isc_ntpaths_get(NAMED_CONF_PATH);
ns_g_defaultpidfile = isc_ntpaths_get(NAMED_PID_PATH);
lwresd_g_defaultpidfile = isc_ntpaths_get(LWRESD_PID_PATH);
ns_g_keyfile = isc_ntpaths_get(RNDC_KEY_PATH);
Initialized = TRUE;
}
static void
setup_syslog(const char *progname) {
int options;
options = LOG_PID;
#ifdef LOG_NDELAY
options |= LOG_NDELAY;
#endif
openlog(progname, options, LOG_DAEMON);
}
void
ns_os_init(const char *progname) {
ns_paths_init();
setup_syslog(progname);
ntservice_init();
}
void
ns_os_daemonize(void) {
int fd;
/*
* Try to set stdin, stdout, and stderr to /dev/null, but press
* on even if it fails.
*
* XXXMLG The close() calls here are unneeded on all but NetBSD, but
* are harmless to include everywhere. dup2() is supposed to close
* the FD if it is in use, but unproven-pthreads-0.16 is broken
* and will end up closing the wrong FD. This will be fixed eventually,
* and these calls will be removed.
*/
fd = open("NUL", O_RDWR, 0);
if (fd != -1) {
close(_fileno(stdin));
(void)_dup2(fd, _fileno(stdin));
close(_fileno(stdout));
(void)_dup2(fd, _fileno(stdout));
close(_fileno(stderr));
(void)_dup2(fd, _fileno(stderr));
if (fd != _fileno(stdin) &&
fd != _fileno(stdout) &&
fd != _fileno(stderr))
(void)close(fd);
}
}
void
ns_os_chroot(const char *root) {
}
void
ns_os_inituserinfo(const char *username) {
}
void
ns_os_changeuser(void) {
}
void
ns_os_minprivs(void) {
}
static int
safe_open(const char *filename, isc_boolean_t append) {
int fd;
struct stat sb;
if (stat(filename, &sb) == -1) {
if (errno != ENOENT)
return (-1);
} else if ((sb.st_mode & S_IFREG) == 0)
return (-1);
if (append)
fd = open(filename, O_WRONLY|O_CREAT|O_APPEND,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
else {
(void)unlink(filename);
fd = open(filename, O_WRONLY|O_CREAT|O_EXCL,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
}
return (fd);
}
static void
cleanup_pidfile(void) {
if (pidfile != NULL) {
(void)unlink(pidfile);
free(pidfile);
}
pidfile = NULL;
}
void
ns_os_writepidfile(const char *filename, isc_boolean_t first_time) {
int fd;
FILE *lockfile;
size_t len;
pid_t pid;
void (*report)(const char *, ...);
/*
* The caller must ensure any required synchronization.
*/
report = first_time ? ns_main_earlyfatal : ns_main_earlywarning;
cleanup_pidfile();
len = strlen(filename);
pidfile = malloc(len + 1);
if (pidfile == NULL) {
(*report)("couldn't malloc '%s': %s", filename,
strerror(errno));
return;
}
/* This is safe. */
strcpy(pidfile, filename);
fd = safe_open(filename, ISC_FALSE);
if (fd < 0) {
(*report)("couldn't open pid file '%s': %s", filename,
strerror(errno));
free(pidfile);
pidfile = NULL;
return;
}
lockfile = fdopen(fd, "w");
if (lockfile == NULL) {
(*report)("could not fdopen() pid file '%s': %s", filename,
strerror(errno));
(void)close(fd);
cleanup_pidfile();
return;
}
pid = getpid();
if (fprintf(lockfile, "%ld\n", (long)pid) < 0) {
(*report)("fprintf() to pid file '%s' failed", filename);
(void)fclose(lockfile);
cleanup_pidfile();
return;
}
if (fflush(lockfile) == EOF) {
(*report)("fflush() to pid file '%s' failed", filename);
(void)fclose(lockfile);
cleanup_pidfile();
return;
}
(void)fclose(lockfile);
}
void
ns_os_shutdown(void) {
closelog();
cleanup_pidfile();
ntservice_shutdown(); /* This MUST be the last thing done */
}
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