# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1159537492 0
# Node ID de85bc61c2dc31c2f36731a8a452a2c043c5ceb3
# Parent  6fe5ab1621687cab7e1091448657f7e3d49a1734
New function fwriteerror_no_ebadf.

diff --git a/lib/ChangeLog b/lib/ChangeLog
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,10 @@
+2006-09-29  Bruno Haible  <bruno@clisp.org>
+
+	* fwriteerror.h (fwriteerror_no_ebadf): New declaration.
+	* (do_fwriteerror): Renamed from fwriteerror. Add ignore_ebadf
+	argument. Set stdout_closed before testing for ferror, not after.
+	(fwriteerror, fwriteerror_no_ebadf): New functions.
+
 2006-09-28  Bruno Haible  <bruno@clisp.org>
 
 	* strndup.h: Simplify the redefinition of strndup.
diff --git a/lib/fwriteerror.c b/lib/fwriteerror.c
--- a/lib/fwriteerror.c
+++ b/lib/fwriteerror.c
@@ -24,14 +24,20 @@
 #include <errno.h>
 #include <stdbool.h>
 
-int
-fwriteerror (FILE *fp)
+static int
+do_fwriteerror (FILE *fp, bool ignore_ebadf)
 {
   /* State to allow multiple calls to fwriteerror (stdout).  */
   static bool stdout_closed = false;
 
-  if (fp == stdout && stdout_closed)
-    return 0;
+  if (fp == stdout)
+    {
+      if (stdout_closed)
+	return 0;
+
+      /* If we are closing stdout, don't attempt to do it later again.  */
+      stdout_closed = true;
+    }
 
   /* Need to
      1. test the error indicator of the stream,
@@ -56,25 +62,47 @@
 	goto close_preserving_errno; /* errno is set here */
       /* Give up on errno.  */
       errno = 0;
-     close_preserving_errno:
-      /* There's an error.  Nevertheless call fclose(fp), for consistency
-	 with the other cases.  */
-      {
-	int saved_errno = errno;
-	fclose (fp);
-	errno = saved_errno;
-	return -1;
-      }
+      goto close_preserving_errno;
+    }
+
+  if (ignore_ebadf)
+    {
+      /* We need an explicit fflush to tell whether some output was already
+	 done on FP.  */
+      if (fflush (fp))
+	goto close_preserving_errno; /* errno is set here */
+      if (fclose (fp) && errno != EBADF)
+	return -1; /* errno is set here */
+    }
+  else
+    {
+      if (fclose (fp))
+	return -1; /* errno is set here */
     }
 
-  /* If we are closing stdout, don't attempt to do it later again.  */
-  if (fp == stdout)
-    stdout_closed = true;
+  return 0;
 
-  if (fclose (fp))
-    return -1; /* errno is set here */
+ close_preserving_errno:
+  /* There's an error.  Nevertheless call fclose(fp), for consistency
+     with the other cases.  */
+  {
+    int saved_errno = errno;
+    fclose (fp);
+    errno = saved_errno;
+    return -1;
+  }
+}
 
-  return 0;
+int
+fwriteerror (FILE *fp)
+{
+  return do_fwriteerror (fp, false);
+}
+
+int
+fwriteerror_no_ebadf (FILE *fp)
+{
+  return do_fwriteerror (fp, true);
 }
 
 
diff --git a/lib/fwriteerror.h b/lib/fwriteerror.h
--- a/lib/fwriteerror.h
+++ b/lib/fwriteerror.h
@@ -1,5 +1,5 @@
 /* Detect write error on a stream.
-   Copyright (C) 2003, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2005-2006 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2003.
 
    This program is free software; you can redistribute it and/or modify
@@ -49,3 +49,7 @@
    For any given stream FP other than stdout, fwriteerror (FP) may only be
    called once.  */
 extern int fwriteerror (FILE *fp);
+
+/* Likewise, but don't consider it an error if FP has an invalid file
+   descriptor and no output was done to FP.  */
+extern int fwriteerror_no_ebadf (FILE *fp);