1 /*
2  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #include "tests.h"
29 #include <asm/unistd.h>
30 
31 #ifdef __NR_lseek
32 
33 # include <stdio.h>
34 # include <unistd.h>
35 
36 int
37 main(void)
38 {
39 	const kernel_ulong_t offset = (kernel_ulong_t) 0xfacefeeddeadbeefULL;
40 
41 	if (sizeof(offset) > sizeof(long)) {
42 		/*
43 		 * Cannot use syscall because it takes long arguments.
44 		 * Let's call lseek with hope it will invoke lseek syscall.
45 		 */
46 		long long rc = lseek(-1, offset, SEEK_SET);
47 		printf("lseek(-1, %lld, SEEK_SET) = %lld %s (%m)\n",
48 		       (long long) offset, rc, errno2name());
49 	} else {
50 		long rc = syscall(__NR_lseek, -1L, offset, SEEK_SET);
51 		printf("lseek(-1, %ld, SEEK_SET) = %ld %s (%m)\n",
52 		       (long) offset, rc, errno2name());
53 	}
54 
55 	puts("+++ exited with 0 +++");
56 	return 0;
57 }
58 
59 #else
60 
61 SKIP_MAIN_UNDEFINED("__NR_lseek")
62 
63 #endif
64