1123 lines
24 KiB
C
1123 lines
24 KiB
C
/*
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* ntpd.c - main program for the fixed point NTP daemon
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#include <stdio.h>
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#ifndef SYS_WINNT
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# if !defined(VMS) /*wjm*/
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# include <sys/param.h>
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# endif /* VMS */
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# include <sys/signal.h>
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# ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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# endif /* HAVE_SYS_IOCTL_H */
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# include <sys/time.h>
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# ifdef HAVE_SYS_RESOURCE_H
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# include <sys/resource.h>
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# endif /* HAVE_SYS_RESOURCE_H */
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#else
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# include <signal.h>
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# include <process.h>
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# include <io.h>
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# include "../libntp/log.h"
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# include <crtdbg.h>
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#endif /* SYS_WINNT */
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#if defined(HAVE_RTPRIO)
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# ifdef HAVE_SYS_RESOURCE_H
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# include <sys/resource.h>
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# endif
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# ifdef HAVE_SYS_LOCK_H
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# include <sys/lock.h>
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# endif
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# include <sys/rtprio.h>
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#else
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# ifdef HAVE_PLOCK
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# ifdef HAVE_SYS_LOCK_H
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# include <sys/lock.h>
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# endif
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# endif
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#endif
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#if defined(HAVE_SCHED_SETSCHEDULER)
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# ifdef HAVE_SCHED_H
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# include <sched.h>
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# else
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# ifdef HAVE_SYS_SCHED_H
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# include <sys/sched.h>
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# endif
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# endif
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#endif
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#if defined(HAVE_SYS_MMAN_H)
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# include <sys/mman.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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# include <termios.h>
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#endif
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#ifdef SYS_DOMAINOS
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# include <apollo/base.h>
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#endif /* SYS_DOMAINOS */
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#include "ntpd.h"
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#include "ntp_io.h"
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#include "ntp_stdlib.h"
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#include "recvbuff.h"
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#if 0 /* HMS: I don't think we need this. 961223 */
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#ifdef LOCK_PROCESS
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# ifdef SYS_SOLARIS
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# include <sys/mman.h>
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# else
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# include <sys/lock.h>
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# endif
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#endif
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#endif
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#ifdef _AIX
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#include <ulimit.h>
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#endif /* _AIX */
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#ifdef SCO5_CLOCK
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#include <sys/ci/ciioctl.h>
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#endif
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/*
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* Signals we catch for debugging. If not debugging we ignore them.
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*/
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#define MOREDEBUGSIG SIGUSR1
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#define LESSDEBUGSIG SIGUSR2
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/*
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* Signals which terminate us gracefully.
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*/
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#ifndef SYS_WINNT
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#define SIGDIE1 SIGHUP
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#define SIGDIE3 SIGQUIT
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#define SIGDIE2 SIGINT
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#define SIGDIE4 SIGTERM
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#endif /* SYS_WINNT */
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#if defined SYS_WINNT
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/* handles for various threads, process, and objects */
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HANDLE ResolverThreadHandle = NULL;
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/* variables used to inform the Service Control Manager of our current state */
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SERVICE_STATUS ssStatus;
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SERVICE_STATUS_HANDLE sshStatusHandle;
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HANDLE WaitHandles[2] = { NULL, NULL };
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char szMsgPath[255];
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static BOOL WINAPI OnConsoleEvent(DWORD dwCtrlType);
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#endif /* SYS_WINNT */
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/*
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* Scheduling priority we run at
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*/
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# define NTPD_PRIO (-12)
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/*
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* Debugging flag
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*/
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volatile int debug;
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/*
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* No-fork flag. If set, we do not become a background daemon.
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*/
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int nofork;
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/*
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* Initializing flag. All async routines watch this and only do their
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* thing when it is clear.
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*/
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int initializing;
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/*
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* Version declaration
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*/
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extern const char *Version;
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int was_alarmed;
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#ifdef DECL_SYSCALL
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/*
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* We put this here, since the argument profile is syscall-specific
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*/
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extern int syscall P((int, ...));
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#endif /* DECL_SYSCALL */
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#ifdef SIGDIE2
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static RETSIGTYPE finish P((int));
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#endif /* SIGDIE2 */
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#ifdef DEBUG
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static RETSIGTYPE moredebug P((int));
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static RETSIGTYPE lessdebug P((int));
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#else /* not DEBUG */
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static RETSIGTYPE no_debug P((int));
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#endif /* not DEBUG */
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int ntpdmain P((int, char **));
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static void set_process_priority P((void));
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#ifdef NO_MAIN_ALLOWED
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CALL(ntpd,"ntpd",ntpdmain);
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#else
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int
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main(
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int argc,
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char *argv[]
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)
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{
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return ntpdmain(argc, argv);
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}
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#endif
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#ifdef _AIX
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/*
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* OK. AIX is different than solaris in how it implements plock().
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* If you do NOT adjust the stack limit, you will get the MAXIMUM
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* stack size allocated and PINNED with you program. To check the
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* value, use ulimit -a.
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*
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* To fix this, we create an automatic variable and set our stack limit
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* to that PLUS 32KB of extra space (we need some headroom).
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*
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* This subroutine gets the stack address.
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*
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* Grover Davidson and Matt Ladendorf
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*
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*/
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static char *
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get_aix_stack(void)
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{
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char ch;
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return (&ch);
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}
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/*
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* Signal handler for SIGDANGER.
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*/
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static void
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catch_danger(int signo)
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{
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msyslog(LOG_INFO, "ntpd: setpgid(): %m");
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/* Make the system believe we'll free something, but don't do it! */
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return;
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}
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#endif /* _AIX */
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/*
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* Set the process priority
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*/
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static void
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set_process_priority(void)
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{
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int done = 0;
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#ifdef SYS_WINNT
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DWORD SingleCPUMask = 0;
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DWORD ProcessAffinityMask, SystemAffinityMask;
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if (!GetProcessAffinityMask(GetCurrentProcess(), &ProcessAffinityMask, &SystemAffinityMask))
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msyslog(LOG_ERR, "GetProcessAffinityMask: %m");
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else {
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SingleCPUMask = 1;
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# ifdef DEBUG
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msyslog(LOG_INFO, "System AffinityMask = %x", SystemAffinityMask );
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# endif
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}
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while (SingleCPUMask && !(SingleCPUMask & SystemAffinityMask)) {
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SingleCPUMask = SingleCPUMask << 1;
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}
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if (!SingleCPUMask)
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msyslog(LOG_ERR, "Can't set Processor Affinity Mask");
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else if (!SetProcessAffinityMask(GetCurrentProcess(), SingleCPUMask))
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msyslog(LOG_ERR, "SetProcessAffinityMask: %m");
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# ifdef DEBUG
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else msyslog(LOG_INFO,"ProcessorAffinity Mask: %x", SingleCPUMask );
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# endif
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if (!SetPriorityClass(GetCurrentProcess(), (DWORD) REALTIME_PRIORITY_CLASS))
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msyslog(LOG_ERR, "SetPriorityClass: %m");
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else
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++done;
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#endif
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# if defined(HAVE_SCHED_SETSCHEDULER)
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if (!done) {
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extern int config_priority_override, config_priority;
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int pmax, pmin;
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struct sched_param sched;
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pmax = sched_get_priority_max(SCHED_FIFO);
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sched.sched_priority = pmax;
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if ( config_priority_override ) {
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pmin = sched_get_priority_min(SCHED_FIFO);
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if ( config_priority > pmax )
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sched.sched_priority = pmax;
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else if ( config_priority < pmin )
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sched.sched_priority = pmin;
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else
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sched.sched_priority = config_priority;
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}
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if ( sched_setscheduler(0, SCHED_FIFO, &sched) == -1 )
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msyslog(LOG_ERR, "sched_setscheduler(): %m");
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else
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++done;
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}
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# endif /* HAVE_SCHED_SETSCHEDULER */
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# if defined(HAVE_RTPRIO)
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# ifdef RTP_SET
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if (!done) {
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struct rtprio srtp;
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srtp.type = RTP_PRIO_REALTIME; /* was: RTP_PRIO_NORMAL */
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srtp.prio = 0; /* 0 (hi) -> RTP_PRIO_MAX (31,lo) */
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if (rtprio(RTP_SET, getpid(), &srtp) < 0)
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msyslog(LOG_ERR, "rtprio() error: %m");
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else
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++done;
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}
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# else /* not RTP_SET */
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if (!done) {
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if (rtprio(0, 120) < 0)
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msyslog(LOG_ERR, "rtprio() error: %m");
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else
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++done;
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}
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# endif /* not RTP_SET */
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# endif /* HAVE_RTPRIO */
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# if defined(NTPD_PRIO) && NTPD_PRIO != 0
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# ifdef HAVE_ATT_NICE
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if (!done) {
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errno = 0;
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if (-1 == nice (NTPD_PRIO) && errno != 0)
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msyslog(LOG_ERR, "nice() error: %m");
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else
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++done;
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}
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# endif /* HAVE_ATT_NICE */
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# ifdef HAVE_BSD_NICE
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if (!done) {
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if (-1 == setpriority(PRIO_PROCESS, 0, NTPD_PRIO))
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msyslog(LOG_ERR, "setpriority() error: %m");
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else
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++done;
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}
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# endif /* HAVE_BSD_NICE */
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# endif /* NTPD_PRIO && NTPD_PRIO != 0 */
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if (!done)
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msyslog(LOG_ERR, "set_process_priority: No way found to improve our priority");
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}
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/*
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* Main program. Initialize us, disconnect us from the tty if necessary,
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* and loop waiting for I/O and/or timer expiries.
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*/
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int
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ntpdmain(
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int argc,
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char *argv[]
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)
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{
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l_fp now;
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char *cp;
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struct recvbuf *rbuflist;
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struct recvbuf *rbuf;
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#ifdef _AIX /* HMS: ifdef SIGDANGER? */
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struct sigaction sa;
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#endif
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initializing = 1; /* mark that we are initializing */
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debug = 0; /* no debugging by default */
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nofork = 0; /* will fork by default */
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#ifdef HAVE_UMASK
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{
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unsigned int uv;
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uv = umask(0);
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if(uv)
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(void) umask(uv);
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else
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(void) umask(022);
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}
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#endif
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#ifdef HAVE_GETUID
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{
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uid_t uid;
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uid = getuid();
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if (uid)
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{
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msyslog(LOG_ERR, "ntpd: must be run as root, not uid %ld", (long)uid);
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exit(1);
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}
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}
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#endif
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#ifdef SYS_WINNT
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/* Set the Event-ID message-file name. */
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if (!GetModuleFileName(NULL, szMsgPath, sizeof(szMsgPath))) {
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msyslog(LOG_ERR, "GetModuleFileName(PGM_EXE_FILE) failed: %m\n");
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exit(1);
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}
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addSourceToRegistry("NTP", szMsgPath);
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#endif
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get_systime(&now);
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SRANDOM((int)(now.l_i * now.l_uf));
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getstartup(argc, argv); /* startup configuration, may set debug */
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#if !defined(VMS)
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# ifndef NODETACH
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/*
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* Detach us from the terminal. May need an #ifndef GIZMO.
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*/
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# ifdef DEBUG
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if (!debug && !nofork)
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# else /* DEBUG */
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if (!nofork)
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# endif /* DEBUG */
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{
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# ifndef SYS_WINNT
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# ifdef HAVE_DAEMON
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daemon(0, 0);
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# else /* not HAVE_DAEMON */
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if (fork()) /* HMS: What about a -1? */
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exit(0);
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{
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#if !defined(F_CLOSEM)
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u_long s;
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int max_fd;
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#endif /* not F_CLOSEM */
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/*
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* From 'Writing Reliable AIX Daemons,' SG24-4946-00,
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* by Eric Agar (saves us from doing 32767 system
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* calls)
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*/
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#if defined(F_CLOSEM)
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if (fcntl(0, F_CLOSEM, 0) == -1)
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msyslog(LOG_ERR, "ntpd: failed to close open files(): %m");
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#else /* not F_CLOSEM */
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#if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
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max_fd = sysconf(_SC_OPEN_MAX);
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#else /* HAVE_SYSCONF && _SC_OPEN_MAX */
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max_fd = getdtablesize();
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#endif /* HAVE_SYSCONF && _SC_OPEN_MAX */
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for (s = 0; s < max_fd; s++)
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(void) close((int)s);
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#endif /* not F_CLOSEM */
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(void) open("/", 0);
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(void) dup2(0, 1);
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(void) dup2(0, 2);
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#ifdef SYS_DOMAINOS
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{
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uid_$t puid;
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status_$t st;
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proc2_$who_am_i(&puid);
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proc2_$make_server(&puid, &st);
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}
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#endif /* SYS_DOMAINOS */
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#if defined(HAVE_SETPGID) || defined(HAVE_SETSID)
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# ifdef HAVE_SETSID
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if (setsid() == (pid_t)-1)
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msyslog(LOG_ERR, "ntpd: setsid(): %m");
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# else
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if (setpgid(0, 0) == -1)
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msyslog(LOG_ERR, "ntpd: setpgid(): %m");
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# endif
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#else /* HAVE_SETPGID || HAVE_SETSID */
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{
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# if defined(TIOCNOTTY)
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int fid;
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fid = open("/dev/tty", 2);
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if (fid >= 0)
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{
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(void) ioctl(fid, (u_long) TIOCNOTTY, (char *) 0);
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(void) close(fid);
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}
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# endif /* defined(TIOCNOTTY) */
|
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# ifdef HAVE_SETPGRP_0
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(void) setpgrp();
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# else /* HAVE_SETPGRP_0 */
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(void) setpgrp(0, getpid());
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# endif /* HAVE_SETPGRP_0 */
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}
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#endif /* HAVE_SETPGID || HAVE_SETSID */
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#ifdef _AIX
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/* Don't get killed by low-on-memory signal. */
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sa.sa_handler = catch_danger;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART;
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(void) sigaction(SIGDANGER, &sa, NULL);
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#endif /* _AIX */
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}
|
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#endif /* not HAVE_DAEMON */
|
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#else /* SYS_WINNT */
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{
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SERVICE_TABLE_ENTRY dispatchTable[] = {
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{ TEXT("NetworkTimeProtocol"), (LPSERVICE_MAIN_FUNCTION)service_main },
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{ NULL, NULL }
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};
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/* daemonize */
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if (!StartServiceCtrlDispatcher(dispatchTable))
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{
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msyslog(LOG_ERR, "StartServiceCtrlDispatcher: %m");
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ExitProcess(2);
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}
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}
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#endif /* SYS_WINNT */
|
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}
|
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#endif /* NODETACH */
|
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#if defined(SYS_WINNT) && !defined(NODETACH)
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else
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service_main(argc, argv);
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return 0; /* must return a value */
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} /* end main */
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|
|
/*
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* If this runs as a service under NT, the main thread will block at
|
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* StartServiceCtrlDispatcher() and another thread will be started by the
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|
* Service Control Dispatcher which will begin execution at the routine
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|
* specified in that call (viz. service_main)
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|
*/
|
|
void
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service_main(
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DWORD argc,
|
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LPTSTR *argv
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)
|
|
{
|
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char *cp;
|
|
struct recvbuf *rbuflist;
|
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struct recvbuf *rbuf;
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|
|
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if(!debug)
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|
{
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|
/* register our service control handler */
|
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if (!(sshStatusHandle = RegisterServiceCtrlHandler( TEXT("NetworkTimeProtocol"),
|
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(LPHANDLER_FUNCTION)service_ctrl)))
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{
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msyslog(LOG_ERR, "RegisterServiceCtrlHandler failed: %m");
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return;
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}
|
|
|
|
/* report pending status to Service Control Manager */
|
|
ssStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
|
|
ssStatus.dwCurrentState = SERVICE_START_PENDING;
|
|
ssStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
|
|
ssStatus.dwWin32ExitCode = NO_ERROR;
|
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ssStatus.dwServiceSpecificExitCode = 0;
|
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ssStatus.dwCheckPoint = 1;
|
|
ssStatus.dwWaitHint = 5000;
|
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if (!SetServiceStatus(sshStatusHandle, &ssStatus))
|
|
{
|
|
msyslog(LOG_ERR, "SetServiceStatus: %m");
|
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ssStatus.dwCurrentState = SERVICE_STOPPED;
|
|
SetServiceStatus(sshStatusHandle, &ssStatus);
|
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return;
|
|
}
|
|
|
|
} /* debug */
|
|
#endif /* defined(SYS_WINNT) && !defined(NODETACH) */
|
|
#endif /* VMS */
|
|
|
|
/*
|
|
* Logging. This may actually work on the gizmo board. Find a name
|
|
* to log with by using the basename of argv[0]
|
|
*/
|
|
cp = strrchr(argv[0], '/');
|
|
if (cp == 0)
|
|
cp = argv[0];
|
|
else
|
|
cp++;
|
|
|
|
debug = 0; /* will be immediately re-initialized 8-( */
|
|
getstartup(argc, argv); /* startup configuration, catch logfile this time */
|
|
|
|
#if !defined(SYS_WINNT) && !defined(VMS)
|
|
|
|
# ifndef LOG_DAEMON
|
|
openlog(cp, LOG_PID);
|
|
# else /* LOG_DAEMON */
|
|
|
|
# ifndef LOG_NTP
|
|
# define LOG_NTP LOG_DAEMON
|
|
# endif
|
|
openlog(cp, LOG_PID | LOG_NDELAY, LOG_NTP);
|
|
# ifdef DEBUG
|
|
if (debug)
|
|
setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
else
|
|
# endif /* DEBUG */
|
|
setlogmask(LOG_UPTO(LOG_DEBUG)); /* @@@ was INFO */
|
|
# endif /* LOG_DAEMON */
|
|
#endif /* !SYS_WINNT && !VMS */
|
|
|
|
NLOG(NLOG_SYSINFO) /* conditional if clause for conditional syslog */
|
|
msyslog(LOG_NOTICE, "%s", Version);
|
|
|
|
#ifdef SYS_WINNT
|
|
/* GMS 1/18/1997
|
|
* TODO: lock the process in memory using SetProcessWorkingSetSize() and VirtualLock() functions
|
|
*
|
|
process_handle = GetCurrentProcess();
|
|
if (SetProcessWorkingSetSize(process_handle, 2097152 , 4194304 ) == TRUE) {
|
|
if (VirtualLock(0 , 4194304) == FALSE)
|
|
msyslog(LOG_ERR, "VirtualLock() failed: %m");
|
|
} else {
|
|
msyslog(LOG_ERR, "SetProcessWorkingSetSize() failed: %m");
|
|
}
|
|
*/
|
|
#endif /* SYS_WINNT */
|
|
|
|
#ifdef SCO5_CLOCK
|
|
/*
|
|
* SCO OpenServer's system clock offers much more precise timekeeping
|
|
* on the base CPU than the other CPUs (for multiprocessor systems),
|
|
* so we must lock to the base CPU.
|
|
*/
|
|
{
|
|
int fd = open("/dev/at1", O_RDONLY);
|
|
if (fd >= 0) {
|
|
int zero = 0;
|
|
if (ioctl(fd, ACPU_LOCK, &zero) < 0)
|
|
msyslog(LOG_ERR, "cannot lock to base CPU: %m\n");
|
|
close( fd );
|
|
} /* else ...
|
|
* If we can't open the device, this probably just isn't
|
|
* a multiprocessor system, so we're A-OK.
|
|
*/
|
|
}
|
|
#endif
|
|
|
|
#if defined(HAVE_MLOCKALL) && defined(MCL_CURRENT) && defined(MCL_FUTURE)
|
|
/*
|
|
* lock the process into memory
|
|
*/
|
|
if (mlockall(MCL_CURRENT|MCL_FUTURE) < 0)
|
|
msyslog(LOG_ERR, "mlockall(): %m");
|
|
#else /* not (HAVE_MLOCKALL && MCL_CURRENT && MCL_FUTURE) */
|
|
# ifdef HAVE_PLOCK
|
|
# ifdef PROCLOCK
|
|
# ifdef _AIX
|
|
/*
|
|
* set the stack limit for AIX for plock().
|
|
* see get_aix_stack for more info.
|
|
*/
|
|
if (ulimit(SET_STACKLIM, (get_aix_stack() - 8*4096)) < 0)
|
|
{
|
|
msyslog(LOG_ERR,"Cannot adjust stack limit for plock on AIX: %m");
|
|
}
|
|
# endif /* _AIX */
|
|
/*
|
|
* lock the process into memory
|
|
*/
|
|
if (plock(PROCLOCK) < 0)
|
|
msyslog(LOG_ERR, "plock(PROCLOCK): %m");
|
|
# else /* not PROCLOCK */
|
|
# ifdef TXTLOCK
|
|
/*
|
|
* Lock text into ram
|
|
*/
|
|
if (plock(TXTLOCK) < 0)
|
|
msyslog(LOG_ERR, "plock(TXTLOCK) error: %m");
|
|
# else /* not TXTLOCK */
|
|
msyslog(LOG_ERR, "plock() - don't know what to lock!");
|
|
# endif /* not TXTLOCK */
|
|
# endif /* not PROCLOCK */
|
|
# endif /* HAVE_PLOCK */
|
|
#endif /* not (HAVE_MLOCKALL && MCL_CURRENT && MCL_FUTURE) */
|
|
|
|
/*
|
|
* Set up signals we pay attention to locally.
|
|
*/
|
|
#ifdef SIGDIE1
|
|
(void) signal_no_reset(SIGDIE1, finish);
|
|
#endif /* SIGDIE1 */
|
|
#ifdef SIGDIE2
|
|
(void) signal_no_reset(SIGDIE2, finish);
|
|
#endif /* SIGDIE2 */
|
|
#ifdef SIGDIE3
|
|
(void) signal_no_reset(SIGDIE3, finish);
|
|
#endif /* SIGDIE3 */
|
|
#ifdef SIGDIE4
|
|
(void) signal_no_reset(SIGDIE4, finish);
|
|
#endif /* SIGDIE4 */
|
|
|
|
#ifdef SIGBUS
|
|
(void) signal_no_reset(SIGBUS, finish);
|
|
#endif /* SIGBUS */
|
|
|
|
#if !defined(SYS_WINNT) && !defined(VMS)
|
|
# ifdef DEBUG
|
|
(void) signal_no_reset(MOREDEBUGSIG, moredebug);
|
|
(void) signal_no_reset(LESSDEBUGSIG, lessdebug);
|
|
# else
|
|
(void) signal_no_reset(MOREDEBUGSIG, no_debug);
|
|
(void) signal_no_reset(LESSDEBUGSIG, no_debug);
|
|
# endif /* DEBUG */
|
|
#endif /* !SYS_WINNT && !VMS */
|
|
|
|
/*
|
|
* Set up signals we should never pay attention to.
|
|
*/
|
|
#if defined SIGPIPE
|
|
(void) signal_no_reset(SIGPIPE, SIG_IGN);
|
|
#endif /* SIGPIPE */
|
|
|
|
#if defined SYS_WINNT
|
|
if (!SetConsoleCtrlHandler(OnConsoleEvent, TRUE)) {
|
|
msyslog(LOG_ERR, "Can't set console control handler: %m");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Call the init_ routines to initialize the data structures.
|
|
*/
|
|
#if defined (HAVE_IO_COMPLETION_PORT)
|
|
init_io_completion_port();
|
|
init_winnt_time();
|
|
#endif
|
|
init_auth();
|
|
init_util();
|
|
init_restrict();
|
|
init_mon();
|
|
init_timer();
|
|
init_lib();
|
|
init_random();
|
|
init_request();
|
|
init_control();
|
|
init_peer();
|
|
#ifdef REFCLOCK
|
|
init_refclock();
|
|
#endif
|
|
set_process_priority();
|
|
init_proto();
|
|
init_io();
|
|
init_loopfilter();
|
|
|
|
mon_start(MON_ON); /* monitor on by default now */
|
|
/* turn off in config if unwanted */
|
|
|
|
/*
|
|
* Get configuration. This (including argument list parsing) is
|
|
* done in a separate module since this will definitely be different
|
|
* for the gizmo board.
|
|
*/
|
|
getconfig(argc, argv);
|
|
|
|
initializing = 0;
|
|
|
|
#if defined(SYS_WINNT) && !defined(NODETACH)
|
|
# if defined(DEBUG)
|
|
if(!debug)
|
|
{
|
|
#endif
|
|
/* report to the service control manager that the service is running */
|
|
ssStatus.dwCurrentState = SERVICE_RUNNING;
|
|
ssStatus.dwWin32ExitCode = NO_ERROR;
|
|
if (!SetServiceStatus(sshStatusHandle, &ssStatus))
|
|
{
|
|
msyslog(LOG_ERR, "SetServiceStatus: %m");
|
|
if (ResolverThreadHandle != NULL)
|
|
CloseHandle(ResolverThreadHandle);
|
|
ssStatus.dwCurrentState = SERVICE_STOPPED;
|
|
SetServiceStatus(sshStatusHandle, &ssStatus);
|
|
return;
|
|
}
|
|
# if defined(DEBUG)
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* Report that we're up to any trappers
|
|
*/
|
|
report_event(EVNT_SYSRESTART, (struct peer *)0);
|
|
|
|
/*
|
|
* Use select() on all on all input fd's for unlimited
|
|
* time. select() will terminate on SIGALARM or on the
|
|
* reception of input. Using select() means we can't do
|
|
* robust signal handling and we get a potential race
|
|
* between checking for alarms and doing the select().
|
|
* Mostly harmless, I think.
|
|
*/
|
|
/* On VMS, I suspect that select() can't be interrupted
|
|
* by a "signal" either, so I take the easy way out and
|
|
* have select() time out after one second.
|
|
* System clock updates really aren't time-critical,
|
|
* and - lacking a hardware reference clock - I have
|
|
* yet to learn about anything else that is.
|
|
*/
|
|
# if defined(HAVE_IO_COMPLETION_PORT)
|
|
WaitHandles[0] = CreateEvent(NULL, FALSE, FALSE, NULL); /* exit reques */
|
|
WaitHandles[1] = get_timer_handle();
|
|
|
|
for (;;) {
|
|
DWORD Index = WaitForMultipleObjectsEx(sizeof(WaitHandles)/sizeof(WaitHandles[0]), WaitHandles, FALSE, 1000, MWMO_ALERTABLE);
|
|
switch (Index) {
|
|
case WAIT_OBJECT_0 + 0 : /* exit request */
|
|
exit(0);
|
|
break;
|
|
|
|
case WAIT_OBJECT_0 + 1 : /* timer */
|
|
timer();
|
|
break;
|
|
case WAIT_OBJECT_0 + 2 : { /* Windows message */
|
|
MSG msg;
|
|
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
|
|
if (msg.message == WM_QUIT) {
|
|
exit(0);
|
|
}
|
|
DispatchMessage(&msg);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case WAIT_IO_COMPLETION : /* loop */
|
|
case WAIT_TIMEOUT :
|
|
break;
|
|
|
|
} /* switch */
|
|
rbuflist = getrecvbufs(); /* get received buffers */
|
|
|
|
# else /* normal I/O */
|
|
|
|
was_alarmed = 0;
|
|
rbuflist = (struct recvbuf *)0;
|
|
for (;;)
|
|
{
|
|
# if !defined(HAVE_SIGNALED_IO)
|
|
extern fd_set activefds;
|
|
extern int maxactivefd;
|
|
|
|
fd_set rdfdes;
|
|
int nfound;
|
|
# elif defined(HAVE_SIGNALED_IO)
|
|
block_io_and_alarm();
|
|
# endif
|
|
|
|
rbuflist = getrecvbufs(); /* get received buffers */
|
|
if (alarm_flag) /* alarmed? */
|
|
{
|
|
was_alarmed = 1;
|
|
alarm_flag = 0;
|
|
}
|
|
|
|
if (!was_alarmed && rbuflist == (struct recvbuf *)0)
|
|
{
|
|
/*
|
|
* Nothing to do. Wait for something.
|
|
*/
|
|
#ifndef HAVE_SIGNALED_IO
|
|
rdfdes = activefds;
|
|
# if defined(VMS) || defined(SYS_VXWORKS)
|
|
/* make select() wake up after one second */
|
|
{
|
|
struct timeval t1;
|
|
|
|
t1.tv_sec = 1; t1.tv_usec = 0;
|
|
nfound = select(maxactivefd+1, &rdfdes, (fd_set *)0,
|
|
(fd_set *)0, &t1);
|
|
}
|
|
# else
|
|
nfound = select(maxactivefd+1, &rdfdes, (fd_set *)0,
|
|
(fd_set *)0, (struct timeval *)0);
|
|
# endif /* VMS */
|
|
if (nfound > 0)
|
|
{
|
|
l_fp ts;
|
|
|
|
get_systime(&ts);
|
|
|
|
(void)input_handler(&ts);
|
|
}
|
|
else if (nfound == -1 && errno != EINTR)
|
|
msyslog(LOG_ERR, "select() error: %m");
|
|
else if (debug) {
|
|
# if !defined SYS_VXWORKS && !defined SCO5_CLOCK /* to unclutter log */
|
|
msyslog(LOG_DEBUG, "select(): nfound=%d, error: %m", nfound);
|
|
# endif
|
|
}
|
|
# else /* HAVE_SIGNALED_IO */
|
|
|
|
wait_for_signal();
|
|
# endif /* HAVE_SIGNALED_IO */
|
|
if (alarm_flag) /* alarmed? */
|
|
{
|
|
was_alarmed = 1;
|
|
alarm_flag = 0;
|
|
}
|
|
rbuflist = getrecvbufs(); /* get received buffers */
|
|
}
|
|
# ifdef HAVE_SIGNALED_IO
|
|
unblock_io_and_alarm();
|
|
# endif /* HAVE_SIGNALED_IO */
|
|
|
|
/*
|
|
* Out here, signals are unblocked. Call timer routine
|
|
* to process expiry.
|
|
*/
|
|
if (was_alarmed)
|
|
{
|
|
timer();
|
|
was_alarmed = 0;
|
|
}
|
|
|
|
# endif /* HAVE_IO_COMPLETION_PORT */
|
|
/*
|
|
* Call the data procedure to handle each received
|
|
* packet.
|
|
*/
|
|
while (rbuflist != (struct recvbuf *)0)
|
|
{
|
|
rbuf = rbuflist;
|
|
rbuflist = rbuf->next;
|
|
(rbuf->receiver)(rbuf);
|
|
freerecvbuf(rbuf);
|
|
}
|
|
# if defined DEBUG && defined SYS_WINNT
|
|
if (debug > 4)
|
|
printf("getrecvbufs: %ld handler interrupts, %ld frames\n",
|
|
handler_calls, handler_pkts);
|
|
# endif
|
|
|
|
/*
|
|
* Go around again
|
|
*/
|
|
}
|
|
exit(1); /* unreachable */
|
|
return 1; /* DEC OSF cc braindamage */
|
|
}
|
|
|
|
|
|
#ifdef SIGDIE2
|
|
/*
|
|
* finish - exit gracefully
|
|
*/
|
|
static RETSIGTYPE
|
|
finish(
|
|
int sig
|
|
)
|
|
{
|
|
|
|
msyslog(LOG_NOTICE, "ntpd exiting on signal %d", sig);
|
|
|
|
switch (sig)
|
|
{
|
|
#ifdef SIGBUS
|
|
case SIGBUS:
|
|
printf("\nfinish(SIGBUS)\n");
|
|
exit(0);
|
|
#endif
|
|
case 0: /* Should never happen... */
|
|
return;
|
|
default:
|
|
exit(0);
|
|
}
|
|
}
|
|
#endif /* SIGDIE2 */
|
|
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* moredebug - increase debugging verbosity
|
|
*/
|
|
static RETSIGTYPE
|
|
moredebug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
if (debug < 255)
|
|
{
|
|
debug++;
|
|
msyslog(LOG_DEBUG, "debug raised to %d", debug);
|
|
}
|
|
errno = saved_errno;
|
|
}
|
|
|
|
/*
|
|
* lessdebug - decrease debugging verbosity
|
|
*/
|
|
static RETSIGTYPE
|
|
lessdebug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
if (debug > 0)
|
|
{
|
|
debug--;
|
|
msyslog(LOG_DEBUG, "debug lowered to %d", debug);
|
|
}
|
|
errno = saved_errno;
|
|
}
|
|
#else /* not DEBUG */
|
|
/*
|
|
* no_debug - We don't do the debug here.
|
|
*/
|
|
static RETSIGTYPE
|
|
no_debug(
|
|
int sig
|
|
)
|
|
{
|
|
int saved_errno = errno;
|
|
|
|
msyslog(LOG_DEBUG, "ntpd not compiled for debugging (signal %d)", sig);
|
|
errno = saved_errno;
|
|
}
|
|
#endif /* not DEBUG */
|
|
|
|
#ifdef SYS_WINNT
|
|
/* service_ctrl - control handler for NTP service
|
|
* signals the service_main routine of start/stop requests
|
|
* from the control panel or other applications making
|
|
* win32API calls
|
|
*/
|
|
void
|
|
service_ctrl(
|
|
DWORD dwCtrlCode
|
|
)
|
|
{
|
|
DWORD dwState = SERVICE_RUNNING;
|
|
|
|
/* Handle the requested control code */
|
|
switch(dwCtrlCode)
|
|
{
|
|
case SERVICE_CONTROL_PAUSE:
|
|
/* see no reason to support this */
|
|
break;
|
|
|
|
case SERVICE_CONTROL_CONTINUE:
|
|
/* see no reason to support this */
|
|
break;
|
|
|
|
case SERVICE_CONTROL_STOP:
|
|
dwState = SERVICE_STOP_PENDING;
|
|
/*
|
|
* Report the status, specifying the checkpoint and waithint,
|
|
* before setting the termination event.
|
|
*/
|
|
ssStatus.dwCurrentState = dwState;
|
|
ssStatus.dwWin32ExitCode = NO_ERROR;
|
|
ssStatus.dwWaitHint = 3000;
|
|
if (!SetServiceStatus(sshStatusHandle, &ssStatus))
|
|
{
|
|
msyslog(LOG_ERR, "SetServiceStatus: %m");
|
|
}
|
|
if (WaitHandles[0] != NULL) {
|
|
SetEvent(WaitHandles[0]);
|
|
}
|
|
return;
|
|
|
|
case SERVICE_CONTROL_INTERROGATE:
|
|
/* Update the service status */
|
|
break;
|
|
|
|
default:
|
|
/* invalid control code */
|
|
break;
|
|
|
|
}
|
|
|
|
ssStatus.dwCurrentState = dwState;
|
|
ssStatus.dwWin32ExitCode = NO_ERROR;
|
|
if (!SetServiceStatus(sshStatusHandle, &ssStatus))
|
|
{
|
|
msyslog(LOG_ERR, "SetServiceStatus: %m");
|
|
}
|
|
}
|
|
|
|
static BOOL WINAPI
|
|
OnConsoleEvent(
|
|
DWORD dwCtrlType
|
|
)
|
|
{
|
|
switch (dwCtrlType) {
|
|
case CTRL_BREAK_EVENT :
|
|
if (debug > 0) {
|
|
debug <<= 1;
|
|
}
|
|
else {
|
|
debug = 1;
|
|
}
|
|
if (debug > 8) {
|
|
debug = 0;
|
|
}
|
|
printf("debug level %d\n", debug);
|
|
break ;
|
|
|
|
case CTRL_C_EVENT :
|
|
case CTRL_CLOSE_EVENT :
|
|
case CTRL_SHUTDOWN_EVENT :
|
|
if (WaitHandles[0] != NULL) {
|
|
SetEvent(WaitHandles[0]);
|
|
}
|
|
break;
|
|
|
|
default :
|
|
return FALSE;
|
|
|
|
|
|
}
|
|
return TRUE;;
|
|
}
|
|
|
|
|
|
/*
|
|
* NT version of exit() - all calls to exit() should be routed to
|
|
* this function.
|
|
*/
|
|
void
|
|
service_exit(
|
|
int status
|
|
)
|
|
{
|
|
if (!debug) { /* did not become a service, simply exit */
|
|
/* service mode, need to have the service_main routine
|
|
* register with the service control manager that the
|
|
* service has stopped running, before exiting
|
|
*/
|
|
ssStatus.dwCurrentState = SERVICE_STOPPED;
|
|
SetServiceStatus(sshStatusHandle, &ssStatus);
|
|
|
|
}
|
|
uninit_io_completion_port();
|
|
reset_winnt_time();
|
|
|
|
# if defined _MSC_VER
|
|
_CrtDumpMemoryLeaks();
|
|
# endif
|
|
#undef exit
|
|
exit(status);
|
|
}
|
|
|
|
#endif /* SYS_WINNT */
|