busybox/libbb/fclose_nonstdin.c
Denys Vlasenko 259b3c047a sed: open input files sequentially to avoid EMFILE
Currently, sed pre-opens all files, which may cause EMFILE errors
on systems with low ulimit -n.  Change sed to open one file at a time.

function                                             old     new   delta
get_next_line                                        177     235     +58
sed_main                                             682     652     -30
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 58/-30)             Total: 28 bytes

Based on the patch by Daniel Borca <dborca@yahoo.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-11-28 03:14:16 +01:00

27 lines
709 B
C

/* vi: set sw=4 ts=4: */
/*
* fclose_nonstdin implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* A number of standard utilities can accept multiple command line args
* of '-' for stdin, according to SUSv3. So we encapsulate the check
* here to save a little space.
*/
#include "libbb.h"
int FAST_FUNC fclose_if_not_stdin(FILE *f)
{
/* Some more paranoid applets want ferror() check too */
int r = ferror(f); /* NB: does NOT set errno! */
if (r)
errno = EIO; /* so we'll help it */
if (f != stdin)
return (r | fclose(f)); /* fclose does set errno on error */
return r;
}