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//-----------------------------------------------------------------------------
//
// KDE Help main
//
// (c) Martin R. Jones 1996
//
#include <signal.h>
#include <sys/stat.h>
#include <kapp.h>
#include "khelp.h"
static int msgqid = -1;
void kHelp::openWindow( const char *url )
{
QString pidFile = getenv( "HOME" );
pidFile += "/.kde/share/apps/kdehelp/kdehelp.pid";
// if there is a pidFile then there is an instance of kdehelp running
if ( ( fp = fopen( pidFile, "r" ) ) != NULL )
{
printf( "found PID file\n" );
KHelpMsg buf;
int pid;
buf.setType( 1L );
buf.setMsg( url );
fscanf( fp, "%d %d", &pid, &msgqid );
// if this fails I assume that the pid file is left over from bad exit
// and continue on
//
if ( buf.send( msgqid ) != -1)
{
// if we don't receive a reply within 5secs assume previous
// instance of kdehelp died an unatural death.
// How should this stuff be handled properly? File locking?
//
time_t start = time(NULL);
while ( time(NULL) - start < 5 )
{
if (buf.recv( msgqid, 2L, IPC_NOWAIT ) != -1)
{
return;
}
}
}
fclose( fp );
}
if ( fork() == 0 )
{
execlp( "kdehelp", "kdehelp", url, 0 );
exit(1);
}
}
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