initial import

1 files changed, 87 insertions, 0 deletions

diff --git a/sysdeps/standalone/read.c b/sysdeps/standalone/read.c
new file mode 100644
index 0000000000..284321d717
--- /dev/null
+++ b/sysdeps/standalone/read.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+   Ported to standalone by Joel Sherrill jsherril@redstone-emh2.army.mil,
+     On-Line Applications Research Corporation.
+
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stddef.h>
+
+#include "filedesc.h"
+#include <fcntl.h>
+#include <standalone.h>
+
+/* Read NBYTES into BUF from FD.  Return the number read or -1.  */
+ssize_t
+DEFUN(__read, (fd, buf, nbytes),
+      int fd AND PTR buf AND size_t nbytes)
+{
+  char *buffer = (char *) buf;
+  int data;
+  int poll;
+
+  errno = 0;
+
+  if (nbytes == 0)
+    return 0;
+
+  if ( !__FD_Is_valid( fd ) || !__FD_Table[ fd ].in_use )
+    {
+      errno = EBADF;
+      return -1;
+    }
+  if (buf == NULL)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  if ( __FD_Table[ fd ].flags & O_WRONLY )  /* is it write only? */
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  /* If this is a non-blocking fd, then we want to poll the console.  */
+
+  poll = ( __FD_Table[ fd ].flags & O_NONBLOCK ) ? 1 : 0;
+
+  /* Read a single character.  This is a cheap way to insure that the 
+     upper layers get every character because _Console_Getc can't timeout 
+     or otherwise know when to stop.  */
+
+  
+  data = _Console_Getc(poll);
+
+  if ( data == -1 )                 /* if no data return */
+    return -1;
+
+  (void) _Console_Putc(data);       /* echo the character */
+
+  if ( data == '\r' ) {		/* translate CR -> CR/LF */
+    (void) _Console_Putc('\n');
+    data = '\n';
+  }
+
+  *buffer = data;
+  return 1;
+}
+
+weak_alias (__read, read)