/* Close standard input, rewinding seekable stdin if necessary.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2009-2013 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
For example, POSIX requires that these two commands behave alike:
(sed -ne 1q; cat) < file
- tail -n 1 file
+ tail -n +2 file
Since close_stdin is commonly registered via 'atexit', POSIX
and the C standard both say that it should not call 'exit',
the removal of these files.
It's important to detect such failures and exit nonzero because many
- tools (most notably `make' and other build-management systems) depend
+ tools (most notably 'make' and other build-management systems) depend
on being able to detect failure in other tools via their exit status. */
void
/* There is no need to flush stdin if we can determine quickly that stdin's
input buffer is empty; in this case we know that if stdin is seekable,
- fseeko (stdin, 0, SEEK_CUR) == lseek (0, 0, SEEK_CUR). */
+ (fseeko (stdin, 0, SEEK_CUR), ftello (stdin))
+ == lseek (0, 0, SEEK_CUR). */
if (freadahead (stdin) > 0)
{
/* Only attempt flush if stdin is seekable, as fflush is entitled to
- fail on non-seekable streams. */
+ fail on non-seekable streams. */
if (fseeko (stdin, 0, SEEK_CUR) == 0 && fflush (stdin) != 0)
- fail = true;
+ fail = true;
}
if (close_stream (stdin) != 0)
fail = true;
if (fail)
{
/* Report failure, but defer exit until after closing stdout,
- since the failure report should still be flushed. */
+ since the failure report should still be flushed. */
char const *close_error = _("error closing file");
if (file_name)
- error (0, errno, "%s: %s", quotearg_colon (file_name),
- close_error);
+ error (0, errno, "%s: %s", quotearg_colon (file_name),
+ close_error);
else
- error (0, errno, "%s", close_error);
+ error (0, errno, "%s", close_error);
}
close_stdout ();