usr/src/usr.bin/f77/libU77/fork_.c

/*-
 * Copyright (c) 1980 The Regents of the University of California.
 * All rights reserved.
 *
 * This module is believed to contain source code proprietary to AT&T.
 * Use and redistribution is subject to the Berkeley Software License
 * Agreement and your Software Agreement with AT&T (Western Electric).
 */

#ifndef lint
static char sccsid[] = "@(#)fork_.c     5.2 (Berkeley) 4/12/91";
#endif /* not lint */

/*
 * fork a copy of this process
 *
 * calling sequence:
 *      integer fork
 *      ierror = fork()
 * where:
 *      ierror will be  - child pid if parent and successful
 *                      - 0 if child
 *                      - -errno if unsuccessful
 */

#include        "../libI77/fiodefs.h"

extern int errno;

long fork_()
{
        long i;

        for (i = 0; i < MXUNIT; i++)
                flush_(&i);
        i = (long)fork();
        if (i < 0)
                return((long)(-errno));
        return(i);
}