1 /* 2 * Check decoding of sethostname syscall. 3 * 4 * Copyright (c) 2016 Fei Jie <feij.fnst (at) cn.fujitsu.com> 5 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "tests.h" 32 #include <asm/unistd.h> 33 34 #ifdef __NR_sethostname 35 36 # include <stdio.h> 37 # include <unistd.h> 38 39 #ifdef HAVE_LINUX_UTSNAME_H 40 # include <linux/utsname.h> 41 #endif 42 43 #ifndef __NEW_UTS_LEN 44 # define __NEW_UTS_LEN 64 45 #endif 46 47 int 48 main(void) 49 { 50 kernel_ulong_t len; 51 long rc; 52 53 len = __NEW_UTS_LEN; 54 rc = syscall(__NR_sethostname, 0, len); 55 printf("sethostname(NULL, %u) = %s\n", 56 (unsigned) len, sprintrc(rc)); 57 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)); 63 } 64 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)); 70 71 puts("+++ exited with 0 +++"); 72 return 0; 73 } 74 75 #else 76 77 SKIP_MAIN_UNDEFINED("__NR_sethostname") 78 79 #endif 80
