closeonexec.c

/*  $Revision: 6790 $
**
*/
/*#include "configdata.h"*/
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>
#include <sys/ioctl.h>
#include "clibrary.h"

#ifndef CLX_IOCTL
#  define CLX_IOCTL
#endif
#ifndef CLX_FCNTL
#  define CLX_FCNTL
#endif
//add for cygwin
#ifndef FIOCLEX
#define FIOCLEX 0x5451
#endif
#ifndef FIONCLEX
#define FIONCLEX 0x5450
#endif
#if defined(CLX_IOCTL) && !defined(IRIX)
#if defined(__linux) || defined(CYGWIN)
#include <termios.h>
#else
#include <sgtty.h>
#endif
/*
**  Mark a file close-on-exec so that it doesn't get shared with our
**  children.  Ignore any error codes.
*/
void
closeOnExec(fd, flag)
int fd;
int flag;
{
	int oerrno;

	oerrno = errno;
	(void) ioctl(fd, flag ? FIOCLEX : FIONCLEX, (char *) NULL);
	errno = oerrno;
}
#endif				/* defined(CLX_IOCTL) */

#if	defined(CLX_FCNTL)
#include <fcntl.h>

/*
**  Mark a file close-on-exec so that it doesn't get shared with our
**  children.  Ignore any error codes.
*/
void
CloseOnExec(fd, flag)
int fd;
int flag;
{
	int oerrno;

	oerrno = errno;
	(void) fcntl(fd, F_SETFD, flag ? 1 : 0);
	errno = oerrno;
}
#endif				/* defined(CLX_FCNTL) */