Sweden-Number/libs/port/spawn.c

77 lines
2.1 KiB
C

/*
* spawnvp function
*
* Copyright 2003 Dimitrie O. Paun
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <errno.h>
#include <signal.h>
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifndef HAVE_SPAWNVP
int spawnvp(int mode, const char *cmdname, const char *const argv[])
{
#ifndef HAVE__SPAWNVP
int pid = 0, status, wret;
struct sigaction dfl_act, old_act;
if (mode == _P_OVERLAY)
{
execvp(cmdname, (char **)argv);
return -1; /* if we get here it failed */
}
dfl_act.sa_handler = SIG_DFL;
dfl_act.sa_flags = 0;
sigemptyset( &dfl_act.sa_mask );
if (mode == _P_WAIT) sigaction( SIGCHLD, &dfl_act, &old_act );
pid = fork();
if (pid == 0)
{
sigaction( SIGPIPE, &dfl_act, NULL );
execvp(cmdname, (char **)argv);
_exit(1);
}
if (pid != -1 && mode == _P_WAIT)
{
while (pid != (wret = waitpid(pid, &status, 0)))
if (wret == -1 && errno != EINTR) break;
if (pid == wret && WIFEXITED(status)) pid = WEXITSTATUS(status);
else pid = 255; /* abnormal exit with an abort or an interrupt */
}
if (mode == _P_WAIT) sigaction( SIGCHLD, &old_act, NULL );
return pid;
#else /* HAVE__SPAWNVP */
return _spawnvp(mode, cmdname, argv);
#endif /* HAVE__SPAWNVP */
}
#endif /* HAVE_SPAWNVP */