92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
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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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