/* Copyright 1988, 1998 The Open Group Copyright 2000-2005 Oswald Buddenhagen <ossi@kde.org> 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; }