OpenSolaris Launch

1 files changed, 105 insertions, 0 deletions

diff --git a/usr/src/lib/libc/port/stdio/gets.c b/usr/src/lib/libc/port/stdio/gets.c
new file mode 100644
index 0000000000..5aacf35465
--- /dev/null
+++ b/usr/src/lib/libc/port/stdio/gets.c
@@ -0,0 +1,105 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*	Copyright (c) 1988 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+#include "synonyms.h"
+#include "file64.h"
+#include "mtlib.h"
+#include <sys/types.h>
+#include <stdio.h>
+#include <memory.h>
+#include <thread.h>
+#include <synch.h>
+#include <errno.h>
+#include "stdiom.h"
+#include "mse.h"
+
+/* read a single line from stdin, replace the '\n' with '\0' */
+char *
+gets(char *buf)
+{
+	char *ptr = buf;
+	ssize_t n;
+	char *p;
+	Uchar *bufend;
+	rmutex_t *lk;
+
+	FLOCKFILE(lk, stdin);
+
+	_SET_ORIENTATION_BYTE(stdin);
+
+	if (!(stdin->_flag & (_IOREAD | _IORW))) {
+		errno = EBADF;
+		FUNLOCKFILE(lk);
+		return (0);
+	}
+
+	if (stdin->_base == NULL) {
+		if ((bufend = _findbuf(stdin)) == 0) {
+			FUNLOCKFILE(lk);
+			return (0);
+		}
+	}
+	else
+		bufend = _bufend(stdin);
+
+	for (;;)	/* until get a '\n' */
+	{
+		if (stdin->_cnt <= 0)	/* empty buffer */
+		{
+			if (__filbuf(stdin) != EOF) {
+				stdin->_ptr--;	/* put back the character */
+				stdin->_cnt++;
+			} else if (ptr == buf) {  /* never read anything */
+				FUNLOCKFILE(lk);
+				return (0);
+			} else
+				break;		/* nothing left to read */
+		}
+		n = stdin->_cnt;
+		if ((p = (char *)memccpy(ptr, (char *)stdin->_ptr, '\n',
+		    (size_t)n)) != 0)
+			n = p - ptr;
+		ptr += n;
+		stdin->_cnt -= n;
+		stdin->_ptr += n;
+		if (_needsync(stdin, bufend))
+			_bufsync(stdin, bufend);
+		if (p != 0) /* found a '\n' */
+		{
+			ptr--;	/* step back over the '\n' */
+			break;
+		}
+	}
+	*ptr = '\0';
+	FUNLOCKFILE(lk);
+	return (buf);
+}