2 * Check decoding of sethostname syscall.
4 * Copyright (c) 2016 Fei Jie <feij.fnst@cn.fujitsu.com>
5 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
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17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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32 #include <asm/unistd.h>
34 #ifdef __NR_sethostname
39 #ifdef HAVE_LINUX_UTSNAME_H
40 # include <linux/utsname.h>
44 # define __NEW_UTS_LEN 64
54 rc = syscall(__NR_sethostname, 0, len);
55 printf("sethostname(NULL, %u) = %s\n",
56 (unsigned) len, sprintrc(rc));
58 if (F8ILL_KULONG_MASK) {
59 len |= F8ILL_KULONG_MASK;
60 rc = syscall(__NR_sethostname, 0, len);
61 printf("sethostname(NULL, %u) = %s\n",
62 (unsigned) len, sprintrc(rc));
65 len = __NEW_UTS_LEN + 1;
66 void *const p = tail_alloc(len);
67 rc = syscall(__NR_sethostname, p, len);
68 printf("sethostname(%p, %u) = %s\n",
69 p, (unsigned) len, sprintrc(rc));
71 puts("+++ exited with 0 +++");
77 SKIP_MAIN_UNDEFINED("__NR_sethostname")