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https://github.com/samba-team/samba.git
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585b093ce8
Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 2001-2002
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Copyright (C) Simo Sorce 2001
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Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
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Copyright (C) James J Myers 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/filesys.h"
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#include "blocking.h"
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/**
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Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
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else
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if SYSV use O_NDELAY
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if BSD use FNDELAY
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**/
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_PUBLIC_ int set_blocking(int fd, bool set)
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{
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int val;
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#ifdef O_NONBLOCK
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#define FLAG_TO_SET O_NONBLOCK
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#else
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#ifdef SYSV
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#define FLAG_TO_SET O_NDELAY
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#else /* BSD */
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#define FLAG_TO_SET FNDELAY
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#endif
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#endif
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if((val = fcntl(fd, F_GETFL, 0)) == -1)
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return -1;
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if(set) /* Turn blocking on - ie. clear nonblock flag */
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val &= ~FLAG_TO_SET;
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else
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val |= FLAG_TO_SET;
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return fcntl( fd, F_SETFL, val);
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#undef FLAG_TO_SET
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}
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_PUBLIC_ bool smb_set_close_on_exec(int fd)
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{
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#ifdef FD_CLOEXEC
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int val;
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val = fcntl(fd, F_GETFD, 0);
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if (val >= 0) {
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val |= FD_CLOEXEC;
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val = fcntl(fd, F_SETFD, val);
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if (val != -1) {
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return true;
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}
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}
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#else
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errno = ENOSYS;
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#endif
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return false;
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}
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