/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2003 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpichconf.h"
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
/* To get the prototype for getsid in gcc environments,
define both _XOPEN_SOURCE and _XOPEN_SOURCE_EXTENDED or
define _XOPEN_SOURCE n for n >= 500 */
#include <unistd.h>
#endif
#include <errno.h>
#include "pmutil.h"
/* ------------------------------------------------------------------------ */
/* On some systems (SGI IRIX 6), process exit sometimes kills all processes
* in the process GROUP. This code attempts to fix that.
* We DON'T do it if stdin (0) is connected to a terminal, because that
* disconnects the process from the terminal.
* ------------------------------------------------------------------------ */
void MPIE_CreateNewSession(void)
{
#if defined(HAVE_SETSID) && defined(HAVE_ISATTY) && \
defined(USE_NEW_SESSION) && defined(HAVE_GETSID)
#ifdef NEEDS_GETSID_DECL
pid_t getsid(pid_t);
#endif
if (!isatty(0) && !isatty(1) && !isatty(2) && getsid(0) != getpid()) {
pid_t rc;
/* printf("Creating a new session\n"); */
/* printf("Session id = %d and process id = %d\n", getsid(0), getpid());*/
MPIE_SYSCALL(rc, setsid, ());
if (rc < 0) {
MPL_internal_sys_error_printf("setsid", errno, "Could not create new process group\n");
}
}
#endif
}