/* Close a stream, with nicer error checking than fclose's.
- Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2006, 2007 Free
- Software Foundation, Inc.
+ Copyright (C) 1998-2002, 2004, 2006-2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
otherwise. A failure might set errno to 0 if the error number
cannot be determined.
+ A failure with errno set to EPIPE may or may not indicate an error
+ situation worth signaling to the user. See the documentation of the
+ close_stdout_set_ignore_EPIPE function for details.
+
If a program writes *anything* to STREAM, that program should close
STREAM and make sure that it succeeds before exiting. Otherwise,
suppose that you go to the extreme of checking the return status
int
close_stream (FILE *stream)
{
- bool some_pending = (__fpending (stream) != 0);
- bool prev_fail = (ferror (stream) != 0);
- bool fclose_fail = (fclose (stream) != 0);
+ const bool some_pending = (__fpending (stream) != 0);
+ const bool prev_fail = (ferror (stream) != 0);
+ const bool fclose_fail = (fclose (stream) != 0);
/* Return an error indication if there was a previous failure or if
fclose failed, with one exception: ignore an fclose failure if
if (prev_fail || (fclose_fail && (some_pending || errno != EBADF)))
{
if (! fclose_fail)
- errno = 0;
+ errno = 0;
return EOF;
}