901 lines
19 KiB
C
901 lines
19 KiB
C
/* $Xorg: dm.c,v 1.5 2001/02/09 02:05:40 xorgcvs Exp $ */
|
|
/*
|
|
|
|
Copyright 1988, 1998 The Open Group
|
|
|
|
Permission to use, copy, modify, distribute, and sell this software and its
|
|
documentation for any purpose is hereby granted without fee, provided that
|
|
the above copyright notice appear in all copies and that both that
|
|
copyright notice and this permission notice appear in supporting
|
|
documentation.
|
|
|
|
The above copyright notice and this permission notice shall be included
|
|
in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
Except as contained in this notice, the name of The Open Group shall
|
|
not be used in advertising or otherwise to promote the sale, use or
|
|
other dealings in this Software without prior written authorization
|
|
from The Open Group.
|
|
|
|
*/
|
|
/* $XFree86: xc/programs/xdm/dm.c,v 3.23 2003/09/17 05:48:32 herrb Exp $ */
|
|
|
|
/*
|
|
* xdm - display manager daemon
|
|
* Author: Keith Packard, MIT X Consortium
|
|
*
|
|
* display manager
|
|
*/
|
|
|
|
# include "dm.h"
|
|
# include "dm_auth.h"
|
|
# include "dm_error.h"
|
|
|
|
# include <stdio.h>
|
|
#ifdef X_POSIX_C_SOURCE
|
|
#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
|
|
#include <signal.h>
|
|
#undef _POSIX_C_SOURCE
|
|
#else
|
|
#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
|
|
#include <signal.h>
|
|
#else
|
|
#define _POSIX_SOURCE
|
|
#include <signal.h>
|
|
#undef _POSIX_SOURCE
|
|
#endif
|
|
#endif
|
|
#ifdef __NetBSD__
|
|
#include <sys/param.h>
|
|
#endif
|
|
#ifdef USESECUREWARE
|
|
#include <prot.h>
|
|
#endif
|
|
|
|
#ifndef sigmask
|
|
#define sigmask(m) (1 << ((m - 1)))
|
|
#endif
|
|
|
|
# include <sys/stat.h>
|
|
# include <errno.h>
|
|
# include <X11/Xfuncproto.h>
|
|
# include <stdarg.h>
|
|
|
|
#ifndef F_TLOCK
|
|
#ifndef X_NOT_POSIX
|
|
# include <unistd.h>
|
|
#endif
|
|
#endif
|
|
|
|
|
|
#if defined(SVR4) && !defined(sun)
|
|
extern FILE *fdopen();
|
|
#endif
|
|
|
|
static SIGVAL StopAll (int n), RescanNotify (int n);
|
|
static void RescanServers (void);
|
|
static void RestartDisplay (struct display *d, int forceReserver);
|
|
static void ScanServers (void);
|
|
static void SetAccessFileTime (void);
|
|
static void SetConfigFileTime (void);
|
|
static void StartDisplays (void);
|
|
static void TerminateProcess (int pid, int signal);
|
|
|
|
volatile int Rescan;
|
|
static long ServersModTime, ConfigModTime, AccessFileModTime;
|
|
|
|
int nofork_session = 0;
|
|
|
|
#ifndef NOXDMTITLE
|
|
static char *Title;
|
|
static int TitleLen;
|
|
#endif
|
|
|
|
#ifndef UNRELIABLE_SIGNALS
|
|
static SIGVAL ChildNotify (int n);
|
|
#endif
|
|
|
|
static int StorePid (void);
|
|
|
|
static int parent_pid = -1; /* PID of parent xdm process */
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
int oldpid, oldumask;
|
|
char cmdbuf[1024];
|
|
|
|
/* make sure at least world write access is disabled */
|
|
if (((oldumask = umask(022)) & 002) == 002)
|
|
(void) umask (oldumask);
|
|
#ifndef NOXDMTITLE
|
|
Title = argv[0];
|
|
TitleLen = (argv[argc - 1] + strlen(argv[argc - 1])) - Title;
|
|
#endif
|
|
|
|
#ifdef USESECUREWARE
|
|
set_auth_parameters (argc, argv);
|
|
#endif
|
|
|
|
/*
|
|
* Step 1 - load configuration parameters
|
|
*/
|
|
InitResources (argc, argv);
|
|
SetConfigFileTime ();
|
|
LoadDMResources ();
|
|
/*
|
|
* Only allow root to run in non-debug mode to avoid problems
|
|
*/
|
|
if (debugLevel == 0 && getuid() != 0)
|
|
{
|
|
fprintf (stderr, "Only root wants to run %s\n", argv[0]);
|
|
exit (1);
|
|
}
|
|
if (debugLevel == 0 && daemonMode)
|
|
BecomeDaemon ();
|
|
if (debugLevel >= 10)
|
|
nofork_session = 1;
|
|
/* SUPPRESS 560 */
|
|
if ((oldpid = StorePid ()))
|
|
{
|
|
if (oldpid == -1)
|
|
LogError ("Can't create/lock pid file %s\n", pidFile);
|
|
else
|
|
LogError ("Can't lock pid file %s, another xdm is running (pid %d)\n",
|
|
pidFile, oldpid);
|
|
exit (1);
|
|
}
|
|
if (debugLevel == 0)
|
|
InitErrorLog ();
|
|
|
|
if (nofork_session == 0) {
|
|
/* Clean up any old Authorization files */
|
|
/* AUD: all good? */
|
|
snprintf(cmdbuf, sizeof(cmdbuf), "/bin/rm -f %s/authdir/authfiles/A*", authDir);
|
|
system(cmdbuf);
|
|
}
|
|
#if!defined(ARC4_RANDOM) && !defined(DEV_RANDOM)
|
|
AddOtherEntropy ();
|
|
#endif
|
|
#ifdef XDMCP
|
|
init_session_id ();
|
|
CreateWellKnownSockets ();
|
|
#else
|
|
Debug ("xdm: not compiled for XDMCP\n");
|
|
#endif
|
|
parent_pid = getpid ();
|
|
(void) Signal (SIGTERM, StopAll);
|
|
(void) Signal (SIGINT, StopAll);
|
|
/*
|
|
* Step 2 - Read /etc/Xservers and set up
|
|
* the socket.
|
|
*
|
|
* Keep a sub-daemon running
|
|
* for each entry
|
|
*/
|
|
SetAccessFileTime ();
|
|
#ifdef XDMCP
|
|
ScanAccessDatabase ();
|
|
UpdateListenSockets ();
|
|
#endif
|
|
ScanServers ();
|
|
StartDisplays ();
|
|
#if !defined(ARC4_RANDOM) && !defined(DEV_RANDOM)
|
|
AddOtherEntropy();
|
|
#endif
|
|
(void) Signal (SIGHUP, RescanNotify);
|
|
#ifndef UNRELIABLE_SIGNALS
|
|
(void) Signal (SIGCHLD, ChildNotify);
|
|
#endif
|
|
while (
|
|
#ifdef XDMCP
|
|
AnyWellKnownSockets() ||
|
|
#endif
|
|
AnyDisplaysLeft ())
|
|
{
|
|
if (Rescan)
|
|
{
|
|
RescanServers ();
|
|
Rescan = 0;
|
|
}
|
|
#if defined(UNRELIABLE_SIGNALS) || !defined(XDMCP)
|
|
WaitForChild ();
|
|
#else
|
|
WaitForSomething ();
|
|
#endif
|
|
}
|
|
Debug ("Nothing left to do, exiting\n");
|
|
exit(0);
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static SIGVAL
|
|
RescanNotify (int n)
|
|
{
|
|
int olderrno = errno;
|
|
|
|
Debug ("Caught SIGHUP\n");
|
|
Rescan = 1;
|
|
#ifdef SIGNALS_RESET_WHEN_CAUGHT
|
|
(void) Signal (SIGHUP, RescanNotify);
|
|
#endif
|
|
errno = olderrno;
|
|
}
|
|
|
|
static void
|
|
ScanServers (void)
|
|
{
|
|
char lineBuf[10240];
|
|
int len;
|
|
FILE *serversFile;
|
|
struct stat statb;
|
|
static DisplayType acceptableTypes[] =
|
|
{ { Local, Permanent, FromFile },
|
|
{ Foreign, Permanent, FromFile },
|
|
};
|
|
|
|
#define NumTypes (sizeof (acceptableTypes) / sizeof (acceptableTypes[0]))
|
|
|
|
if (servers[0] == '/')
|
|
{
|
|
serversFile = fopen (servers, "r");
|
|
if (serversFile == NULL)
|
|
{
|
|
LogError ("cannot access servers file %s\n", servers);
|
|
return;
|
|
}
|
|
if (ServersModTime == 0)
|
|
{
|
|
fstat (fileno (serversFile), &statb);
|
|
ServersModTime = statb.st_mtime;
|
|
}
|
|
while (fgets (lineBuf, sizeof (lineBuf)-1, serversFile))
|
|
{
|
|
len = strlen (lineBuf);
|
|
if (lineBuf[len-1] == '\n')
|
|
lineBuf[len-1] = '\0';
|
|
ParseDisplay (lineBuf, acceptableTypes, NumTypes);
|
|
}
|
|
fclose (serversFile);
|
|
}
|
|
else
|
|
{
|
|
ParseDisplay (servers, acceptableTypes, NumTypes);
|
|
}
|
|
}
|
|
|
|
static void
|
|
MarkDisplay (struct display *d)
|
|
{
|
|
d->state = MissingEntry;
|
|
}
|
|
|
|
static void
|
|
RescanServers (void)
|
|
{
|
|
Debug ("rescanning servers\n");
|
|
LogInfo ("Rescanning both config and servers files\n");
|
|
ForEachDisplay (MarkDisplay);
|
|
SetConfigFileTime ();
|
|
ReinitResources ();
|
|
LoadDMResources ();
|
|
ScanServers ();
|
|
SetAccessFileTime ();
|
|
#ifdef XDMCP
|
|
ScanAccessDatabase ();
|
|
UpdateListenSockets ();
|
|
#endif
|
|
StartDisplays ();
|
|
}
|
|
|
|
static void
|
|
SetConfigFileTime (void)
|
|
{
|
|
struct stat statb;
|
|
|
|
if (stat (config, &statb) != -1)
|
|
ConfigModTime = statb.st_mtime;
|
|
}
|
|
|
|
static void
|
|
SetAccessFileTime (void)
|
|
{
|
|
struct stat statb;
|
|
|
|
if (stat (accessFile, &statb) != -1)
|
|
AccessFileModTime = statb.st_mtime;
|
|
}
|
|
|
|
static void
|
|
RescanIfMod (void)
|
|
{
|
|
struct stat statb;
|
|
|
|
if (config && stat (config, &statb) != -1)
|
|
{
|
|
if (statb.st_mtime != ConfigModTime)
|
|
{
|
|
Debug ("Config file %s has changed, rereading\n", config);
|
|
LogInfo ("Rereading configuration file %s\n", config);
|
|
ConfigModTime = statb.st_mtime;
|
|
ReinitResources ();
|
|
LoadDMResources ();
|
|
}
|
|
}
|
|
if (servers[0] == '/' && stat(servers, &statb) != -1)
|
|
{
|
|
if (statb.st_mtime != ServersModTime)
|
|
{
|
|
Debug ("Servers file %s has changed, rescanning\n", servers);
|
|
LogInfo ("Rereading servers file %s\n", servers);
|
|
ServersModTime = statb.st_mtime;
|
|
ForEachDisplay (MarkDisplay);
|
|
ScanServers ();
|
|
}
|
|
}
|
|
#ifdef XDMCP
|
|
if (accessFile && accessFile[0] && stat (accessFile, &statb) != -1)
|
|
{
|
|
if (statb.st_mtime != AccessFileModTime)
|
|
{
|
|
Debug ("Access file %s has changed, rereading\n", accessFile);
|
|
LogInfo ("Rereading access file %s\n", accessFile);
|
|
AccessFileModTime = statb.st_mtime;
|
|
ScanAccessDatabase ();
|
|
UpdateListenSockets();
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* catch a SIGTERM, kill all displays and exit
|
|
*/
|
|
|
|
/* ARGSUSED */
|
|
static SIGVAL
|
|
StopAll (int n)
|
|
{
|
|
int olderrno = errno;
|
|
|
|
if (parent_pid != getpid())
|
|
{
|
|
/*
|
|
* We are a child xdm process that was killed by the
|
|
* master xdm before we were able to return from fork()
|
|
* and remove this signal handler.
|
|
*
|
|
* See defect XWSog08655 for more information.
|
|
*/
|
|
Debug ("Child xdm caught SIGTERM before it remove that signal.\n");
|
|
(void) Signal (n, SIG_DFL);
|
|
TerminateProcess (getpid(), SIGTERM);
|
|
errno = olderrno;
|
|
return;
|
|
}
|
|
Debug ("Shutting down entire manager\n");
|
|
#ifdef XDMCP
|
|
DestroyWellKnownSockets ();
|
|
#endif
|
|
ForEachDisplay (StopDisplay);
|
|
#ifdef SIGNALS_RESET_WHEN_CAUGHT
|
|
/* to avoid another one from killing us unceremoniously */
|
|
(void) Signal (SIGTERM, StopAll);
|
|
(void) Signal (SIGINT, StopAll);
|
|
#endif
|
|
errno = olderrno;
|
|
}
|
|
|
|
/*
|
|
* notice that a child has died and may need another
|
|
* sub-daemon started
|
|
*/
|
|
|
|
int ChildReady;
|
|
|
|
#ifndef UNRELIABLE_SIGNALS
|
|
/* ARGSUSED */
|
|
static SIGVAL
|
|
ChildNotify (int n)
|
|
{
|
|
int olderrno = errno;
|
|
|
|
ChildReady = 1;
|
|
#ifdef ISC
|
|
(void) Signal (SIGCHLD, ChildNotify);
|
|
#endif
|
|
errno = olderrno;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
WaitForChild (void)
|
|
{
|
|
int pid;
|
|
struct display *d;
|
|
waitType status;
|
|
#if !defined(X_NOT_POSIX) && !defined(__UNIXOS2__)
|
|
sigset_t mask, omask;
|
|
#else
|
|
int omask;
|
|
#endif
|
|
|
|
#ifdef UNRELIABLE_SIGNALS
|
|
/* XXX classic System V signal race condition here with RescanNotify */
|
|
if ((pid = wait (&status)) != -1)
|
|
#else
|
|
#ifndef X_NOT_POSIX
|
|
sigemptyset(&mask);
|
|
sigaddset(&mask, SIGCHLD);
|
|
sigaddset(&mask, SIGHUP);
|
|
sigprocmask(SIG_BLOCK, &mask, &omask);
|
|
Debug ("signals blocked\n");
|
|
#else
|
|
omask = sigblock (sigmask (SIGCHLD) | sigmask (SIGHUP));
|
|
Debug ("signals blocked, mask was 0x%x\n", omask);
|
|
#endif
|
|
if (!ChildReady && !Rescan)
|
|
#ifndef X_NOT_POSIX
|
|
sigsuspend(&omask);
|
|
#else
|
|
sigpause (omask);
|
|
#endif
|
|
ChildReady = 0;
|
|
#ifndef X_NOT_POSIX
|
|
sigprocmask(SIG_SETMASK, &omask, (sigset_t *)NULL);
|
|
#else
|
|
sigsetmask (omask);
|
|
#endif
|
|
#ifndef X_NOT_POSIX
|
|
while ((pid = waitpid (-1, &status, WNOHANG)) > 0)
|
|
#else
|
|
while ((pid = wait3 (&status, WNOHANG, (struct rusage *) 0)) > 0)
|
|
#endif
|
|
#endif
|
|
{
|
|
Debug ("Manager wait returns pid: %d sig %d core %d code %d\n",
|
|
pid, waitSig(status), waitCore(status), waitCode(status));
|
|
if (autoRescan)
|
|
RescanIfMod ();
|
|
/* SUPPRESS 560 */
|
|
if ((d = FindDisplayByPid (pid))) {
|
|
d->pid = -1;
|
|
switch (waitVal (status)) {
|
|
case UNMANAGE_DISPLAY:
|
|
Debug ("Display exited with UNMANAGE_DISPLAY\n");
|
|
StopDisplay (d);
|
|
break;
|
|
case OBEYSESS_DISPLAY:
|
|
d->startTries = 0;
|
|
Debug ("Display exited with OBEYSESS_DISPLAY\n");
|
|
if (d->displayType.lifetime != Permanent ||
|
|
d->status == zombie)
|
|
StopDisplay (d);
|
|
else
|
|
RestartDisplay (d, FALSE);
|
|
break;
|
|
case OPENFAILED_DISPLAY:
|
|
Debug ("Display exited with OPENFAILED_DISPLAY, try %d of %d\n",
|
|
d->startTries, d->startAttempts);
|
|
LogError ("Display %s cannot be opened\n", d->name);
|
|
/*
|
|
* no display connection was ever made, tell the
|
|
* terminal that the open attempt failed
|
|
*/
|
|
#ifdef XDMCP
|
|
if (d->displayType.origin == FromXDMCP)
|
|
SendFailed (d, "Cannot open display");
|
|
#endif
|
|
if (d->displayType.origin == FromXDMCP ||
|
|
d->status == zombie ||
|
|
++d->startTries >= d->startAttempts)
|
|
{
|
|
LogError ("Display %s is being disabled\n", d->name);
|
|
StopDisplay (d);
|
|
}
|
|
else
|
|
{
|
|
RestartDisplay (d, TRUE);
|
|
}
|
|
break;
|
|
case RESERVER_DISPLAY:
|
|
d->startTries = 0;
|
|
Debug ("Display exited with RESERVER_DISPLAY\n");
|
|
if (d->displayType.origin == FromXDMCP || d->status == zombie)
|
|
StopDisplay(d);
|
|
else
|
|
RestartDisplay (d, TRUE);
|
|
{
|
|
Time_t Time;
|
|
time(&Time);
|
|
Debug("time %i %i\n",Time,d->lastCrash);
|
|
if (d->lastCrash &&
|
|
((Time - d->lastCrash) < XDM_BROKEN_INTERVAL)) {
|
|
Debug("Server crash frequency too high:"
|
|
" removing display %s\n",d->name);
|
|
LogError("Server crash rate too high:"
|
|
" removing display %s\n",d->name);
|
|
#if !defined(ARC4_RANDOM) && !defined(DEV_RANDOM)
|
|
AddTimerEntropy();
|
|
#endif
|
|
RemoveDisplay (d);
|
|
} else
|
|
d->lastCrash = Time;
|
|
}
|
|
break;
|
|
case waitCompose (SIGTERM,0,0):
|
|
Debug ("Display exited on SIGTERM, try %d of %d\n",
|
|
d->startTries, d->startAttempts);
|
|
if (d->displayType.origin == FromXDMCP ||
|
|
d->status == zombie ||
|
|
++d->startTries >= d->startAttempts) {
|
|
LogError ("Display %s is being disabled\n", d->name);
|
|
StopDisplay(d);
|
|
} else
|
|
RestartDisplay (d, TRUE);
|
|
break;
|
|
case REMANAGE_DISPLAY:
|
|
d->startTries = 0;
|
|
Debug ("Display exited with REMANAGE_DISPLAY\n");
|
|
/*
|
|
* XDMCP will restart the session if the display
|
|
* requests it
|
|
*/
|
|
if (d->displayType.origin == FromXDMCP || d->status == zombie)
|
|
StopDisplay(d);
|
|
else
|
|
RestartDisplay (d, FALSE);
|
|
break;
|
|
default:
|
|
Debug ("Display exited with unknown status %d\n", waitVal(status));
|
|
LogError ("Unknown session exit code %d from process %d\n",
|
|
waitVal (status), pid);
|
|
StopDisplay (d);
|
|
break;
|
|
}
|
|
}
|
|
/* SUPPRESS 560 */
|
|
else if ((d = FindDisplayByServerPid (pid)))
|
|
{
|
|
d->serverPid = -1;
|
|
switch (d->status)
|
|
{
|
|
case zombie:
|
|
Debug ("Zombie server reaped, removing display %s\n", d->name);
|
|
RemoveDisplay (d);
|
|
break;
|
|
case phoenix:
|
|
Debug ("Phoenix server arises, restarting display %s\n", d->name);
|
|
d->status = notRunning;
|
|
break;
|
|
case running:
|
|
Debug ("Server for display %s terminated unexpectedly, status %d %d\n", d->name, waitVal (status), status);
|
|
LogError ("Server for display %s terminated unexpectedly: %d\n", d->name, waitVal (status));
|
|
if (d->pid != -1)
|
|
{
|
|
Debug ("Terminating session pid %d\n", d->pid);
|
|
TerminateProcess (d->pid, SIGTERM);
|
|
}
|
|
break;
|
|
case notRunning:
|
|
Debug ("Server exited for notRunning session on display %s\n", d->name);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Debug ("Unknown child termination, status %d\n", waitVal (status));
|
|
}
|
|
}
|
|
StartDisplays ();
|
|
}
|
|
|
|
static void
|
|
CheckDisplayStatus (struct display *d)
|
|
{
|
|
if (d->displayType.origin == FromFile)
|
|
{
|
|
switch (d->state) {
|
|
case MissingEntry:
|
|
StopDisplay (d);
|
|
break;
|
|
case NewEntry:
|
|
d->state = OldEntry;
|
|
case OldEntry:
|
|
if (d->status == notRunning)
|
|
StartDisplay (d);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
StartDisplays (void)
|
|
{
|
|
ForEachDisplay (CheckDisplayStatus);
|
|
}
|
|
|
|
void
|
|
StartDisplay (struct display *d)
|
|
{
|
|
int pid;
|
|
|
|
Debug ("StartDisplay %s\n", d->name);
|
|
LoadServerResources (d);
|
|
if (d->displayType.location == Local)
|
|
{
|
|
/* don't bother pinging local displays; we'll
|
|
* certainly notice when they exit
|
|
*/
|
|
d->pingInterval = 0;
|
|
if (d->authorize)
|
|
{
|
|
Debug ("SetLocalAuthorization %s, auth %s\n",
|
|
d->name, d->authNames[0]);
|
|
SetLocalAuthorization (d);
|
|
/*
|
|
* reset the server after writing the authorization information
|
|
* to make it read the file (for compatibility with old
|
|
* servers which read auth file only on reset instead of
|
|
* at first connection)
|
|
*/
|
|
if (d->serverPid != -1 && d->resetForAuth && d->resetSignal)
|
|
kill (d->serverPid, d->resetSignal);
|
|
}
|
|
if (d->serverPid == -1 && !StartServer (d))
|
|
{
|
|
LogError ("Server for display %s can't be started, session disabled\n", d->name);
|
|
RemoveDisplay (d);
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* this will only happen when using XDMCP */
|
|
if (d->authorizations)
|
|
SaveServerAuthorizations (d, d->authorizations, d->authNum);
|
|
}
|
|
if (!nofork_session)
|
|
pid = fork ();
|
|
else
|
|
pid = 0;
|
|
switch (pid)
|
|
{
|
|
case 0:
|
|
if (!nofork_session) {
|
|
CleanUpChild ();
|
|
(void) Signal (SIGPIPE, SIG_IGN);
|
|
}
|
|
LoadSessionResources (d);
|
|
SetAuthorization (d);
|
|
if (!WaitForServer (d))
|
|
exit (OPENFAILED_DISPLAY);
|
|
#ifdef XDMCP
|
|
if (d->useChooser)
|
|
RunChooser (d);
|
|
else
|
|
#endif
|
|
ManageSession (d);
|
|
exit (REMANAGE_DISPLAY);
|
|
case -1:
|
|
break;
|
|
default:
|
|
Debug ("pid: %d\n", pid);
|
|
d->pid = pid;
|
|
d->status = running;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
TerminateProcess (int pid, int signal)
|
|
{
|
|
kill (pid, signal);
|
|
#ifdef SIGCONT
|
|
kill (pid, SIGCONT);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* transition from running to zombie or deleted
|
|
*/
|
|
|
|
void
|
|
StopDisplay (struct display *d)
|
|
{
|
|
if (d->serverPid != -1)
|
|
d->status = zombie; /* be careful about race conditions */
|
|
if (d->pid != -1)
|
|
TerminateProcess (d->pid, SIGTERM);
|
|
if (d->serverPid != -1)
|
|
TerminateProcess (d->serverPid, d->termSignal);
|
|
else
|
|
RemoveDisplay (d);
|
|
}
|
|
|
|
/*
|
|
* transition from running to phoenix or notRunning
|
|
*/
|
|
|
|
static void
|
|
RestartDisplay (struct display *d, int forceReserver)
|
|
{
|
|
if (d->serverPid != -1 && (forceReserver || d->terminateServer))
|
|
{
|
|
TerminateProcess (d->serverPid, d->termSignal);
|
|
d->status = phoenix;
|
|
}
|
|
else
|
|
{
|
|
d->status = notRunning;
|
|
}
|
|
}
|
|
|
|
static FD_TYPE CloseMask;
|
|
static int max;
|
|
|
|
void
|
|
RegisterCloseOnFork (int fd)
|
|
{
|
|
FD_SET (fd, &CloseMask);
|
|
if (fd > max)
|
|
max = fd;
|
|
}
|
|
|
|
void
|
|
ClearCloseOnFork (int fd)
|
|
{
|
|
FD_CLR (fd, &CloseMask);
|
|
if (fd == max) {
|
|
while (--fd >= 0)
|
|
if (FD_ISSET (fd, &CloseMask))
|
|
break;
|
|
max = fd;
|
|
}
|
|
}
|
|
|
|
void
|
|
CloseOnFork (void)
|
|
{
|
|
int fd;
|
|
|
|
for (fd = 0; fd <= max; fd++)
|
|
if (FD_ISSET (fd, &CloseMask))
|
|
{
|
|
close (fd);
|
|
}
|
|
FD_ZERO (&CloseMask);
|
|
max = 0;
|
|
}
|
|
|
|
static int pidFd;
|
|
static FILE *pidFilePtr;
|
|
|
|
static int
|
|
StorePid (void)
|
|
{
|
|
int oldpid;
|
|
|
|
if (pidFile[0] != '\0') {
|
|
pidFd = open (pidFile, O_RDWR);
|
|
if (pidFd == -1 && errno == ENOENT)
|
|
pidFd = open (pidFile, O_RDWR|O_CREAT, 0666);
|
|
if (pidFd == -1 || !(pidFilePtr = fdopen (pidFd, "r+")))
|
|
{
|
|
LogError ("process-id file %s cannot be opened\n",
|
|
pidFile);
|
|
return -1;
|
|
}
|
|
if (fscanf (pidFilePtr, "%d\n", &oldpid) != 1)
|
|
oldpid = -1;
|
|
fseek (pidFilePtr, 0l, 0);
|
|
if (lockPidFile)
|
|
{
|
|
#ifdef F_SETLK
|
|
#ifndef SEEK_SET
|
|
#define SEEK_SET 0
|
|
#endif
|
|
struct flock lock_data;
|
|
lock_data.l_type = F_WRLCK;
|
|
lock_data.l_whence = SEEK_SET;
|
|
lock_data.l_start = lock_data.l_len = 0;
|
|
if (fcntl(pidFd, F_SETLK, &lock_data) == -1)
|
|
{
|
|
if (errno == EAGAIN)
|
|
return oldpid;
|
|
else
|
|
return -1;
|
|
}
|
|
#else
|
|
#ifdef LOCK_EX
|
|
if (flock (pidFd, LOCK_EX|LOCK_NB) == -1)
|
|
{
|
|
if (errno == EWOULDBLOCK)
|
|
return oldpid;
|
|
else
|
|
return -1;
|
|
}
|
|
#else
|
|
if (lockf (pidFd, F_TLOCK, 0) == -1)
|
|
{
|
|
if (errno == EACCES)
|
|
return oldpid;
|
|
else
|
|
return -1;
|
|
}
|
|
#endif
|
|
#endif
|
|
}
|
|
fprintf (pidFilePtr, "%5ld\n", (long)getpid ());
|
|
(void) fflush (pidFilePtr);
|
|
RegisterCloseOnFork (pidFd);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
UnlockPidFile (void)
|
|
{
|
|
if (lockPidFile)
|
|
#ifdef F_SETLK
|
|
{
|
|
struct flock lock_data;
|
|
lock_data.l_type = F_UNLCK;
|
|
lock_data.l_whence = SEEK_SET;
|
|
lock_data.l_start = lock_data.l_len = 0;
|
|
(void) fcntl(pidFd, F_SETLK, &lock_data);
|
|
}
|
|
#else
|
|
#ifdef F_ULOCK
|
|
lockf (pidFd, F_ULOCK, 0);
|
|
#else
|
|
flock (pidFd, LOCK_UN);
|
|
#endif
|
|
#endif
|
|
close (pidFd);
|
|
fclose (pidFilePtr);
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAS_SETPROCTITLE
|
|
void SetTitle (char *name, ...)
|
|
{
|
|
#ifndef NOXDMTITLE
|
|
char *p = Title;
|
|
int left = TitleLen;
|
|
char *s;
|
|
va_list args;
|
|
|
|
va_start(args,name);
|
|
*p++ = '-';
|
|
--left;
|
|
s = name;
|
|
while (s)
|
|
{
|
|
while (*s && left > 0)
|
|
{
|
|
*p++ = *s++;
|
|
left--;
|
|
}
|
|
s = va_arg (args, char *);
|
|
}
|
|
while (left > 0)
|
|
{
|
|
*p++ = ' ';
|
|
--left;
|
|
}
|
|
va_end(args);
|
|
#endif
|
|
}
|
|
#endif
|