70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*
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* Invoke a socket syscall, either directly or via __NR_socketcall.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <errno.h>
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#include <unistd.h>
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#include <asm/unistd.h>
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/*
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* Invoke a socket syscall, either directly or via __NR_socketcall.
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* if nr == -1, no direct syscall invocation will be made.
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*/
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int
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socketcall(const int nr, const int call,
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long a1, long a2, long a3, long a4, long a5)
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{
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int rc = -1;
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errno = ENOSYS;
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# ifdef __NR_socketcall
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static int have_socketcall = -1;
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if (have_socketcall < 0) {
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if (syscall(__NR_socketcall, 0L, 0L, 0L, 0L, 0L) < 0
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&& EINVAL == errno) {
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have_socketcall = 1;
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} else {
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have_socketcall = 0;
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}
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}
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if (have_socketcall) {
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const long args[] = { a1, a2, a3, a4, a5 };
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rc = syscall(__NR_socketcall, call, args);
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} else
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# endif
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{
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if (nr != -1)
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rc = syscall(nr, a1, a2, a3, a4, a5);
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}
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return rc;
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}
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