1 files changed, 104 insertions, 0 deletions

diff --git a/lib/libc/stdio/stdio.c b/lib/libc/stdio/stdio.c
new file mode 100644
index 000000000000..78993877daf8
--- /dev/null
+++ b/lib/libc/stdio/stdio.c
@@ -0,0 +1,104 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)stdio.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include "local.h"
+
+/*
+ * Small standard I/O/seek/close functions.
+ * These maintain the `known seek offset' for seek optimisation.
+ */
+__sread(cookie, buf, n)
+	void *cookie;
+	char *buf;
+	int n;
+{
+	register FILE *fp = cookie;
+	register int ret;
+	
+	ret = read(fp->_file, buf, n);
+	/* if the read succeeded, update the current offset */
+	if (ret >= 0)
+		fp->_offset += ret;
+	else
+		fp->_flags &= ~__SOFF;	/* paranoia */
+	return (ret);
+}
+
+__swrite(cookie, buf, n)
+	void *cookie;
+	char const *buf;
+	int n;
+{
+	register FILE *fp = cookie;
+
+	if (fp->_flags & __SAPP)
+		(void) lseek(fp->_file, (off_t)0, SEEK_END);
+	fp->_flags &= ~__SOFF;	/* in case FAPPEND mode is set */
+	return (write(fp->_file, buf, n));
+}
+
+fpos_t
+__sseek(cookie, offset, whence)
+	void *cookie;
+	fpos_t offset;
+	int whence;
+{
+	register FILE *fp = cookie;
+	register off_t ret;
+	
+	ret = lseek(fp->_file, (off_t)offset, whence);
+	if (ret == -1L)
+		fp->_flags &= ~__SOFF;
+	else {
+		fp->_flags |= __SOFF;
+		fp->_offset = ret;
+	}
+	return (ret);
+}
+
+__sclose(cookie)
+	void *cookie;
+{
+
+	return (close(((FILE *)cookie)->_file));
+}