1 files changed, 83 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/perror.c b/REORG.TODO/stdio-common/perror.c
new file mode 100644
index 0000000000..d109c63607
--- /dev/null
+++ b/REORG.TODO/stdio-common/perror.c
@@ -0,0 +1,83 @@
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <wchar.h>
+#include "libioP.h"
+
+static void
+perror_internal (FILE *fp, const char *s, int errnum)
+{
+  char buf[1024];
+  const char *colon;
+  const char *errstring;
+
+  if (s == NULL || *s == '\0')
+    s = colon = "";
+  else
+    colon = ": ";
+
+  errstring = __strerror_r (errnum, buf, sizeof buf);
+
+  (void) __fxprintf (fp, "%s%s%s\n", s, colon, errstring);
+}
+
+
+/* Print a line on stderr consisting of the text in S, a colon, a space,
+   a message describing the meaning of the contents of `errno' and a newline.
+   If S is NULL or "", the colon and space are omitted.  */
+void
+perror (const char *s)
+{
+  int errnum = errno;
+  FILE *fp;
+  int fd = -1;
+
+
+  /* The standard says that 'perror' must not change the orientation
+     of the stream.  What is supposed to happen when the stream isn't
+     oriented yet?  In this case we'll create a new stream which is
+     using the same underlying file descriptor.  */
+  if (__builtin_expect (_IO_fwide (stderr, 0) != 0, 1)
+      || (fd = __fileno (stderr)) == -1
+      || (fd = __dup (fd)) == -1
+      || (fp = fdopen (fd, "w+")) == NULL)
+    {
+      if (__glibc_unlikely (fd != -1))
+	__close (fd);
+
+      /* Use standard error as is.  */
+      perror_internal (stderr, s, errnum);
+    }
+  else
+    {
+      /* We don't have to do any special hacks regarding the file
+	 position.  Since the stderr stream wasn't used so far we just
+	 write to the descriptor.  */
+      perror_internal (fp, s, errnum);
+
+      if (_IO_ferror_unlocked (fp))
+	stderr->_flags |= _IO_ERR_SEEN;
+
+      /* Close the stream.  */
+      fclose (fp);
+    }
+}
+libc_hidden_def (perror)