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tdebase
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Code Issues Releases Wiki Activity

Do not chew up all available VT numbers when multiple sessions are reserved and time out in series

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pull/2/head
Timothy Pearson 10 years ago
parent 5b260a9627
commit 4cadf198ca
1 changed files with 86 additions and 51 deletions
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107
tdm/backend/dm.c
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@ -51,6 +51,8 @@ from the copyright holder.
# include <sys/vt.h>
#endif
#define MAX_VT_NUMBER 16
static void SigHandler( int n );
static int ScanConfigs( int force );
static void StartDisplays( void );
@ -523,9 +525,11 @@ CheckTTYMode( void )
{
struct display *d;
for (d = displays; d; d = d->next)
if (d->status == zombie)
for (d = displays; d; d = d->next) {
if (d->status == zombie) {
return;
}
}
SwitchToTty();
}
@ -860,8 +864,7 @@ ReapChildren( void )
struct display *d;
waitType status;
while ((pid = waitpid( -1, &status, WNOHANG )) > 0)
{
while ((pid = waitpid( -1, &status, WNOHANG)) > 0) {
Debug( "manager wait returns pid %d sig %d core %d code %d\n",
pid, waitSig( status ), waitCore( status ), waitCode( status ) );
/* SUPPRESS 560 */
@ -953,7 +956,8 @@ ReapChildren( void )
if (d->follower) {
d->follower->serverVT = d->serverVT;
d->follower = 0;
} else {
}
else {
int con = open("/dev/console", O_RDONLY);
if (con >= 0) {
struct vt_stat vtstat;
@ -961,14 +965,18 @@ ReapChildren( void )
if (vtstat.v_active == d->serverVT) {
int vt = 1;
struct display *di;
for (di = displays; di; di = di->next)
if (di != d && di->serverVT)
for (di = displays; di; di = di->next) {
if (di != d && di->serverVT) {
vt = di->serverVT;
for (di = displays; di; di = di->next)
}
}
for (di = displays; di; di = di->next) {
if (di != d && di->serverVT &&
(di->userSess >= 0 ||
di->status == remoteLogin))
di->status == remoteLogin)) {
vt = di->serverVT;
}
}
ioctl(con, VT_ACTIVATE, vt);
}
ioctl(con, VT_DISALLOCATE, d->serverVT);
@ -976,6 +984,7 @@ ReapChildren( void )
}
}
d->serverVT = 0;
d->status = notRunning;
}
#endif
rStopDisplay(d, d->zstatus);
@ -1032,11 +1041,14 @@ wouldShutdown( void )
struct display *d;
if (sdRec.force != SHUT_CANCEL) {
if (sdRec.force == SHUT_FORCEMY)
for (d = displays; d; d = d->next)
if (sdRec.force == SHUT_FORCEMY) {
for (d = displays; d; d = d->next) {
if (d->status == remoteLogin ||
(d->userSess >= 0 && d->userSess != sdRec.uid))
(d->userSess >= 0 && d->userSess != sdRec.uid)) {
return 0;
}
}
}
return 1;
}
return !AnyActiveDisplays();
@ -1078,7 +1090,9 @@ SigHandler( int n )
int olderrno = errno;
char buf = (char)n;
/* Debug( "caught signal %d\n", n ); this hangs in syslog() */
write( signalFds[1], &buf, 1 );
if (write(signalFds[1], &buf, 1) != 1) {
// ERROR
}
#ifdef __EMX__
(void)Signal( n, SigHandler );
#endif
@ -1178,23 +1192,27 @@ MainLoop( void )
break;
case SIGCHLD:
ReapChildren();
if (!Stopping && autoRescan)
if (!Stopping && autoRescan) {
RescanConfigs( FALSE );
}
break;
case SIGUSR1:
if (startingServer &&
startingServer->serverStatus == starting)
startingServer->serverStatus == starting) {
StartServerSuccess();
}
break;
}
continue;
}
#ifdef XDMCP
if (ProcessListenSockets( &reads ))
if (ProcessListenSockets( &reads )) {
continue;
}
#endif /* XDMCP */
if (handleCtrl( &reads, 0 ))
if (handleCtrl( &reads, 0 )) {
continue;
}
/* Must be last (because of the breaks)! */
again:
for (d = displays; d; d = d->next) {
@ -1216,12 +1234,14 @@ MainLoop( void )
static void
CheckDisplayStatus( struct display *d )
{
if ((d->displayType & d_origin) == dFromFile && !d->stillThere)
if ((d->displayType & d_origin) == dFromFile && !d->stillThere) {
StopDisplay( d );
}
else if ((d->displayType & d_lifetime) == dReserve &&
d->status == running && d->userSess < 0 && !d->idleTimeout)
d->status == running && d->userSess < 0 && !d->idleTimeout) {
rStopDisplay(d, DS_RESERVE);
else if (d->status == notRunning)
}
else if (d->status == notRunning) {
if (LoadDisplayResources( d ) < 0) {
LogError( "Unable to read configuration for display %s; "
"stopping it.\n", d->name );
@ -1229,6 +1249,7 @@ CheckDisplayStatus( struct display *d )
return;
}
}
}
static void
KickDisplay( struct display *d )
@ -1268,8 +1289,9 @@ AllocateVT( struct display *d )
if ((d->displayType & d_location) == dLocal &&
d->status == notRunning && !d->serverVT && d->reqSrvVT >= 0)
{
if (d->reqSrvVT && d->reqSrvVT < 16)
if (d->reqSrvVT && d->reqSrvVT < MAX_VT_NUMBER) {
d->serverVT = d->reqSrvVT;
}
else {
for (i = tvt = 0;;) {
if (serverVTs[i]) {
@ -1279,20 +1301,25 @@ AllocateVT( struct display *d )
tvt = -tvt;
volun = 1;
}
if (!tvt || tvt >= 16)
if (!tvt || tvt >= MAX_VT_NUMBER) {
continue;
} else {
if (++tvt >= 16)
}
}
else {
if (++tvt >= MAX_VT_NUMBER) {
break;
}
volun = 1;
}
for (cd = displays; cd; cd = cd->next) {
if (cd->reqSrvVT == tvt && /* protect from lusers */
(cd->status != zombie || cd->zstatus != DS_REMOVE))
(cd->status != zombie || cd->zstatus != DS_REMOVE)) {
goto next;
}
if (cd->serverVT == tvt) {
if (cd->status != zombie || cd->zstatus == DS_REMOTE)
if (cd->status != zombie || cd->zstatus == DS_REMOTE) {
goto next;
}
if (!cd->follower) {
d->serverVT = -1;
cd->follower = d;
@ -1426,27 +1453,34 @@ rStopDisplay( struct display *d, int endState )
AbortStartServer( d );
d->idleTimeout = 0;
if (d->serverPid != -1 || d->pid != -1) {
if (d->pid != -1)
if (d->pid != -1) {
TerminateProcess( d->pid, SIGTERM );
if (d->serverPid != -1)
}
if (d->serverPid != -1) {
TerminateProcess( d->serverPid, d->termSignal );
}
d->status = zombie;
d->zstatus = endState & 0xff;
Debug( " zombiefied\n" );
} else if (endState == DS_TEXTMODE) {
}
else if (endState == DS_TEXTMODE) {
#ifdef HAVE_VTS
d->status = textMode;
CheckTTYMode();
} else if (endState == (DS_TEXTMODE | 0x100)) {
}
else if (endState == (DS_TEXTMODE | 0x100)) {
d->status = textMode;
#else
SwitchToTty( d );
#endif
} else if (endState == DS_RESERVE)
}
else if (endState == DS_RESERVE) {
d->status = reserve;
}
#ifdef XDMCP
else if (endState == DS_REMOTE)
else if (endState == DS_REMOTE) {
StartRemoteLogin( d );
}
#endif
else {
#ifndef HAVE_VTS
@ -1511,18 +1545,19 @@ ExitDisplay(
he->sdRec.osname = 0;
}
}
if (d->status == zombie)
if (d->status == zombie) {
rStopDisplay(d, d->zstatus);
}
else {
if (Stopping) {
StopDisplay( d );
return;
}
if (endState != DS_RESTART ||
(d->displayType & d_origin) != dFromFile)
{
(d->displayType & d_origin) != dFromFile) {
rStopDisplay(d, endState);
} else {
}
else {
if (serverCmd == XS_RETRY) {
if ((d->displayType & d_location) == dLocal) {
if (he->lastExit - d->lastStart < 120) {

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