/* gets.c - get a string of characters from a file. stdio.h *//* Copyright 1992-1993 Wind River Systems, Inc. *//*modification history--------------------01c,05mar93,jdi  documentation cleanup for 5.1.01b,20sep92,smb  documentation additions01a,29jul92,smb  taken from UCB stdio*//*DESCRIPTION * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE.INCLUDE FILE: stdio.h, unistd.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "unistd.h"#include "private/stdioP.h"/******************************************************************************** gets - read characters from the standard input stream (ANSI)** This routine reads characters from the standard input stream into the* array <buf> until end-of-file is encountered or a new-line is read.* Any new-line character is discarded, and a null character is written * immediately after the last character read into the array.** If end-of-file is encountered and no characters have been read,* the contents of the array remain unchanged.  If a read error* occurs, the array contents are indeterminate.* * INCLUDE FILES: stdio.h ** RETURNS:* A pointer to <buf>, or a null pointer if (1) end-of-file is encountered* and no characters have been read, or (2) there is a read error.*/char * gets     (    char *	buf	/* output array */    )    {    FAST int	c;    FAST char *	s;    for (s = buf; (c = getchar()) != '\n';)	{	if (c == EOF)	    {	    if (s == buf)		return (NULL);	    else		break;	    }	else	    *s++ = c;	}    *s = EOS;    return (buf);    }