initial import

sysdeps/standalone/write.c

@@ -0,0 +1,74 @@
+/* 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 <sysdep.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stddef.h>
+
+#include "filedesc.h"
+#include <fcntl.h>
+#include <standalone.h>
+
+/* Write NBYTES of BUF to FD.  Return the number written, or -1.  */
+ssize_t
+DEFUN(__write, (fd, buf, nbytes),
+      int fd AND CONST PTR buf AND size_t nbytes)
+{
+  int count;
+  CONST char *data = buf;
+
+  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|O_RDWR)) )  /* is it writeable? */
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  /*
+   *  All open file descriptors are mapped to the console.
+   */
+
+  for ( count=0 ; count != nbytes ; count++ ) {
+    if ( _Console_Putc(data[ count ]) == -1 )
+      return -1;
+    if ( data[count] == '\n' && _Console_Putc('\r') == -1 )
+      return -1;
+  }
+
+  return count;
+}
+
+
+weak_alias (__write, write)