1 /* 2 * Invoke a socket syscall, either directly or via __NR_socketcall. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 #include <errno.h> 32 #include <unistd.h> 33 #include <asm/unistd.h> 34 35 /* 36 * Invoke a socket syscall, either directly or via __NR_socketcall. 37 * if nr == -1, no direct syscall invocation will be made. 38 */ 39 int 40 socketcall(const int nr, const int call, 41 long a1, long a2, long a3, long a4, long a5) 42 { 43 int rc = -1; 44 errno = ENOSYS; 45 46 # ifdef __NR_socketcall 47 static int have_socketcall = -1; 48 49 if (have_socketcall < 0) { 50 if (syscall(__NR_socketcall, 0L, 0L, 0L, 0L, 0L) < 0 51 && EINVAL == errno) { 52 have_socketcall = 1; 53 } else { 54 have_socketcall = 0; 55 } 56 } 57 58 if (have_socketcall) { 59 const long args[] = { a1, a2, a3, a4, a5 }; 60 rc = syscall(__NR_socketcall, call, args); 61 } else 62 # endif 63 { 64 if (nr != -1) 65 rc = syscall(nr, a1, a2, a3, a4, a5); 66 } 67 68 return rc; 69 } 70
