/*
* lftp - file transfer program
*
* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <signal.h>
#include <unistd.h>
#include "trio.h"
#include "fg.h"
void FgData::cont()
{
if(!pg)
return;
if(kill(-pg,SIGCONT)==-1)
kill(pg,SIGCONT);
}
FgData::FgData(pid_t npg,bool fg)
{
old_pgrp=0;
pg=npg;
if(!pg)
return;
if(fg)
Fg();
else
cont();
}
FgData::~FgData()
{
if(old_pgrp)
Bg();
}
void FgData::Fg()
{
if(!pg)
return;
pid_t tc_grp=tcgetpgrp(0);
if(tc_grp==-1 || tc_grp==getpgrp())
{
old_pgrp=getpgrp();
#ifdef FG_DEBUG
printf("fg: tcsetpgrp(%d)\n",(int)pg);
#endif
tcsetpgrp(0,pg);
}
cont();
}
void FgData::Bg()
{
if(old_pgrp)
{
#ifdef FG_DEBUG
printf("bg: tcsetpgrp(%d)\n",(int)old_pgrp);
#endif
tcsetpgrp(0,old_pgrp);
old_pgrp=0;
}
}