9da7bdde06
The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Initially, only tag files that use BSD 4-Clause "Original" license. RelNotes: yes Differential Revision: https://reviews.freebsd.org/D13133
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1996 - 1999
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* HD Associates, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by HD Associates, Inc
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include "prutil.h"
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int memlock(int argc, char *argv[])
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{
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int e = 0;
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/* Is memory locking configured?
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*/
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errno = 0;
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if (sysconf(_SC_MEMLOCK) == -1) {
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if (errno != 0) {
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/* This isn't valid - may be a standard violation
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*/
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quit("(should not happen) sysconf(_SC_MEMLOCK)");
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}
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else {
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fprintf(stderr,
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"Memory locking is not supported in this environment.\n");
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e = -1;
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}
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}
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/* Lock yourself in memory:
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*/
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if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) {
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perror("mlockall(MCL_CURRENT | MCL_FUTURE)");
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e = errno;
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}
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else if (munlockall() == -1) {
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perror("munlockall");
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e = errno;
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}
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return e;
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}
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#ifdef NO_MEMLOCK
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int mlockall(int flags)
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{
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return EOPNOTSUPP;
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}
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int munlockall(void)
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{
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return EOPNOTSUPP;
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}
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#endif
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#ifdef STANDALONE_TESTS
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int main(int argc, char *argv[]) { return memlock(argc, argv); }
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#endif
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