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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 2001-2002
Copyright (C) Simo Sorce 2001
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
Copyright (C) James J Myers 2003
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 "blocking.h"
/**
Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
else
if SYSV use O_NDELAY
if BSD use FNDELAY
**/
_PUBLIC_ int set_blocking(int fd, bool set)
{
int val;
#ifdef O_NONBLOCK
#define FLAG_TO_SET O_NONBLOCK
#else
#ifdef SYSV
#define FLAG_TO_SET O_NDELAY
#else /* BSD */
#define FLAG_TO_SET FNDELAY
#endif
#endif
if((val = fcntl(fd, F_GETFL, 0)) == -1)
return -1;
if(set) /* Turn blocking on - ie. clear nonblock flag */
val &= ~FLAG_TO_SET;
else
val |= FLAG_TO_SET;
return fcntl( fd, F_SETFL, val);
#undef FLAG_TO_SET
}
_PUBLIC_ bool smb_set_close_on_exec(int fd)
{
#ifdef FD_CLOEXEC
int val;
val = fcntl(fd, F_GETFD, 0);
if (val >= 0) {
val |= FD_CLOEXEC;
val = fcntl(fd, F_SETFD, val);
if (val != -1) {
return true;
}
}
#else
errno = ENOSYS;
#endif
return false;
}
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