1 files changed, 109 insertions, 0 deletions
diff --git a/StdLib/LibC/Stdio/fopen.c b/StdLib/LibC/Stdio/fopen.c
new file mode 100644
index 0000000000..4b3c14cd28
--- /dev/null
+++ b/StdLib/LibC/Stdio/fopen.c
@@ -0,0 +1,109 @@
+/** @file
+    Implementation of fopen as declared in <stdio.h>.
+
+    Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+    This program and the accompanying materials are licensed and made available
+    under the terms and conditions of the BSD License that accompanies this
+    distribution.  The full text of the license may be found at
+    http://opensource.org/licenses/bsd-license.php.
+
+    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+    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:
+      - Redistributions of source code must retain the above copyright
+        notice, this list of conditions and the following disclaimer.
+      - 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.
+      - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.
+
+    NetBSD: fopen.c,v 1.12 2003/08/07 16:43:24 agc Exp
+    fopen.c 8.1 (Berkeley) 6/4/93"
+**/
+#include  <LibConfig.h>
+#include  <sys/EfiCdefs.h>
+
+#include  <sys/types.h>
+#include  <sys/stat.h>
+#include  <assert.h>
+#include  <fcntl.h>
+#include  <sys/EfiSysCall.h>
+#include  <stdio.h>
+#include  <errno.h>
+#include  "reentrant.h"
+#include  "local.h"
+
+FILE *
+fopen(const char *file, const char *mode)
+{
+  FILE *fp;
+  int f;
+  int flags, oflags;
+
+  _DIAGASSERT(file != NULL);
+  if ((flags = __sflags(mode, &oflags)) == 0)
+    return (NULL);
+  if ((fp = __sfp()) == NULL)
+    return (NULL);
+  if ((f = open(file, oflags, DEFFILEMODE)) < 0)
+    goto release;
+  if (oflags & O_NONBLOCK) {
+    struct stat st;
+    if (fstat(f, &st) == -1) {
+      int sverrno = errno;
+      (void)close(f);
+      errno = sverrno;
+      goto release;
+    }
+    if (!S_ISREG(st.st_mode)) {
+      (void)close(f);
+      errno = EFTYPE;
+      goto release;
+    }
+  }
+  fp->_file = (short)f;
+  fp->_flags = (unsigned short)flags;
+  fp->_cookie = fp;
+  fp->_read = __sread;
+  fp->_write = __swrite;
+  fp->_seek = __sseek;
+  fp->_close = __sclose;
+
+  /*
+   * When opening in append mode, even though we use O_APPEND,
+   * we need to seek to the end so that ftell() gets the right
+   * answer.  If the user then alters the seek pointer, or
+   * the file extends, this will fail, but there is not much
+   * we can do about this.  (We could set __SAPP and check in
+   * fseek and ftell.)
+   */
+  if (oflags & O_APPEND)
+    (void) __sseek((void *)fp, (fpos_t)0, SEEK_END);
+  return (fp);
+release:
+  fp->_flags = 0;     /* release */
+  return (NULL);
+}