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Diffstat (limited to 'kdm/backend/dpylist.c')
| -rw-r--r-- | kdm/backend/dpylist.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/kdm/backend/dpylist.c b/kdm/backend/dpylist.c new file mode 100644 index 000000000..b512293f7 --- /dev/null +++ b/kdm/backend/dpylist.c @@ -0,0 +1,294 @@ +/* + +Copyright 1988, 1998 The Open Group +Copyright 2000-2005 Oswald Buddenhagen <[email protected]> + +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 COPYRIGHT HOLDERS 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 a copyright holder 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 copyright holder. + +*/ + +/* + * xdm - display manager daemon + * Author: Keith Packard, MIT X Consortium + * + * a simple linked list of known displays + */ + +#include "dm.h" +#include "dm_error.h" + +struct display *displays; +static struct disphist *disphist; + +int +AnyDisplaysLeft( void ) +{ + return displays != (struct display *)0; +} + +int +AnyActiveDisplays( void ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if (d->status == remoteLogin || d->userSess >= 0) + return 1; + return 0; +} + +int +AnyRunningDisplays( void ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + switch (d->status) { + case notRunning: + case textMode: + case reserve: + break; + default: + return 1; + } + return 0; +} + +int +AnyReserveDisplays( void ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if ((d->displayType & d_lifetime) == dReserve) + return 1; + return 0; +} + +int +idleReserveDisplays( void ) +{ + struct display *d; + int cnt = 0; + + for (d = displays; d; d = d->next) + if (d->status == reserve) + cnt++; + return cnt; +} + +int +StartReserveDisplay( int lt ) +{ + struct display *d, *rd; + + for (rd = 0, d = displays; d; d = d->next) + if (d->status == reserve) + rd = d; + if (rd) { + rd->idleTimeout = lt; + rd->status = notRunning; + return 1; + } + return 0; +} + +void +ForEachDisplay( void (*f)( struct display * ) ) +{ + struct display *d, *next; + + for (d = displays; d; d = next) { + next = d->next; + (*f)( d ); + } +} + +#ifdef HAVE_VTS +static void +_forEachDisplayRev( struct display *d, void (*f)( struct display * ) ) +{ + if (d) { + if (d->next) + _forEachDisplayRev( d->next, f ); + (*f)( d ); + } +} + +void +ForEachDisplayRev( void (*f)( struct display * ) ) +{ + _forEachDisplayRev( displays, f ); +} +#endif + +struct display * +FindDisplayByName( const char *name ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if (!strcmp( name, d->name )) + return d; + return 0; +} + +struct display * +FindDisplayByPid( int pid ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if (pid == d->pid) + return d; + return 0; +} + +struct display * +FindDisplayByServerPid( int serverPid ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if (serverPid == d->serverPid) + return d; + return 0; +} + +#ifdef XDMCP + +struct display * +FindDisplayBySessionID( CARD32 sessionID ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if (sessionID == d->sessionID) + return d; + return 0; +} + +struct display * +FindDisplayByAddress( XdmcpNetaddr addr, int addrlen, CARD16 displayNumber ) +{ + struct display *d; + + for (d = displays; d; d = d->next) + if ((d->displayType & d_origin) == dFromXDMCP && + d->displayNumber == displayNumber && + addressEqual( (XdmcpNetaddr)d->from.data, d->from.length, + addr, addrlen )) + return d; + return 0; +} + +#endif /* XDMCP */ + +#define IfFree(x) if (x) free( (char *)x ) + +void +RemoveDisplay( struct display *old ) +{ + struct display *d, **dp; + int i; + + for (dp = &displays; (d = *dp); dp = &(*dp)->next) { + if (d == old) { + Debug( "Removing display %s\n", d->name ); + *dp = d->next; + IfFree( d->class2 ); + IfFree( d->cfg.data ); + delStr( d->cfg.dep.name ); +#ifdef XDMCP + IfFree( d->remoteHost ); +#endif + if (d->authorizations) { + for (i = 0; i < d->authNum; i++) + XauDisposeAuth( d->authorizations[i] ); + free( (char *)d->authorizations ); + } + if (d->authFile) { + (void)unlink( d->authFile ); + free( d->authFile ); + } + IfFree( d->authNameLens ); +#ifdef XDMCP + XdmcpDisposeARRAY8( &d->peer ); + XdmcpDisposeARRAY8( &d->from ); + XdmcpDisposeARRAY8( &d->clientAddr ); +#endif + free( (char *)d ); + break; + } + } +} + +static struct disphist * +FindHist( const char *name ) +{ + struct disphist *hstent; + + for (hstent = disphist; hstent; hstent = hstent->next) + if (!strcmp( hstent->name, name )) + return hstent; + return 0; +} + +struct display * +NewDisplay( const char *name ) +{ + struct display *d; + struct disphist *hstent; + + if (!(hstent = FindHist( name ))) { + if (!(hstent = Calloc( 1, sizeof(*hstent) ))) + return 0; + if (!StrDup( &hstent->name, name )) { + free( hstent ); + return 0; + } + hstent->next = disphist; disphist = hstent; + } + + if (!(d = (struct display *)Calloc( 1, sizeof(*d) ))) + return 0; + d->next = displays; + d->hstent = hstent; + d->name = hstent->name; + /* initialize fields (others are 0) */ + d->pid = -1; + d->serverPid = -1; + d->ctrl.fd = -1; + d->ctrl.fifo.fd = -1; + d->pipe.rfd = -1; + d->pipe.wfd = -1; + d->gpipe.rfd = -1; + d->gpipe.wfd = -1; + d->userSess = -1; +#ifdef XDMCP + d->xdmcpFd = -1; +#endif + displays = d; + Debug( "created new display %s\n", d->name ); + return d; +} |