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/*
* \/\/\
*
* Copyright (C) 2012-2016 Vito Caputo - <vcaputo@gnugeneration.com>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 3 as published
* by the Free Software Foundation.
*
* 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/>.
*/
/* launching of external processes / X clients */
#include <stdlib.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "launch.h"
#include "vwm.h"
#define LAUNCHED_RELATIVE_PRIORITY 10 /* the wm priority plus this is used as the priority of launched processes */
/* launch a child command specified in argv, mode decides if we wait for the child to exit before returning. */
void vwm_launch(vwm_t *vwm, char **argv, vwm_launch_mode_t mode)
{
/* XXX: in BG mode I double fork and let init inherit the orphan so I don't have to collect the return status */
if (mode == VWM_LAUNCH_MODE_FG || !fork()) {
if (!fork()) {
/* child */
setpriority(PRIO_PROCESS, getpid(), vwm->priority + LAUNCHED_RELATIVE_PRIORITY);
execvp(argv[0], argv);
}
if (mode == VWM_LAUNCH_MODE_BG) exit(0);
}
wait(NULL); /* TODO: could wait for the specific pid, particularly in FG mode ... */
}
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