mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
de1bf29d25
This is a brown paper bag thingy, right? Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
|
|
* Unix SMB/CIFS implementation.
|
|
* Samba utility functions
|
|
* Copyright (C) Volker Lendecke 2014
|
|
*
|
|
* 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
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "replace.h"
|
|
#include "system/filesys.h"
|
|
#include "close_low_fd.h"
|
|
|
|
_PUBLIC_ int close_low_fd(int fd)
|
|
{
|
|
#ifndef VALGRIND
|
|
int ret, dev_null;
|
|
|
|
dev_null = open("/dev/null", O_RDWR, 0);
|
|
|
|
if ((dev_null == -1) && (errno == ENFILE)) {
|
|
/*
|
|
* Try to free up an fd
|
|
*/
|
|
ret = close(fd);
|
|
if (ret != 0) {
|
|
return errno;
|
|
}
|
|
}
|
|
|
|
dev_null = open("/dev/null", O_RDWR, 0);
|
|
if (dev_null == -1) {
|
|
dev_null = open("/dev/null", O_WRONLY, 0);
|
|
}
|
|
if (dev_null == -1) {
|
|
return errno;
|
|
}
|
|
|
|
if (dev_null == fd) {
|
|
/*
|
|
* This can happen in the ENFILE case above
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
ret = dup2(dev_null, fd);
|
|
if (ret == -1) {
|
|
int err = errno;
|
|
close(dev_null);
|
|
return err;
|
|
}
|
|
close(dev_null);
|
|
#endif
|
|
return 0;
|
|
}
|