1 /* 2 * 3 * Copyright (c) Wipro Technologies, 2002. All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /**************************************************************************** 21 * 22 * TEST IDENTIFIER : sethostname02 23 * 24 * EXECUTED BY : root / superuser 25 * 26 * TEST TITLE : test for checking error conditions for sethostname(2) 27 * 28 * TEST CASE TOTAL : 3 29 * 30 * AUTHOR : Suresh Babu V. <suresh.babu (at) wipro.com> 31 * 32 * SIGNALS 33 * Uses SIGUSR1 to pause before test if option set. 34 * (See the parse_opts(3) man page). 35 * 36 * DESCRIPTION 37 * Verify that, 38 * 1) sethostname(2) returns -1 and sets errno to EINVAL if the parameter, 39 * len is less than zero. 40 * 2) sethostname(2) returns -1 and sets errno to EINVAL if len is greater 41 * than the maximum allowed size. 42 * 3) sethostname(2) returns -1 and sets errno to EFAULT if an invalid 43 * address is given for name. 44 * 45 * Setup: 46 * Setup signal handling. 47 * Save current hostname 48 * Pause for SIGUSR1 if option specified. 49 * 50 * Test: 51 * Loop if the proper options are given. 52 * Execute system call 53 * Check return code, if system call failed and errno set == expected errno 54 * Issue sys call fails with expected return value and errno. 55 * Otherwise, 56 * Issue sys call failed to produce expected error. 57 * 58 * Cleanup: 59 * Restore old hostname. 60 * Print errno log and/or timing stats if options given 61 * 62 * Side Effects : 63 * sethostname() is resetting value to NULL, if an invalid address 64 * is given for name. So, to overcome this problem, hostname is 65 * resetting to original value as part of cleanup() routine. 66 * 67 * USAGE: <for command-line> 68 * sethostname02 [-c n] [-e] [-i n] [-I x] [-P x] [-p] [-t] [-h] 69 * where, -c n : Run n copies concurrently. 70 * -e : Turn on errno logging. 71 * -i n : Execute test n times. 72 * -I x : Execute test for x seconds. 73 * -P x : Pause for x seconds between iterations. 74 * -p : Pause for SIGUSR1 before startingt 75 * -t : Turn on syscall timing. 76 * -h : Display usage information. 77 * 78 ***************************************************************************/ 79 #include <stdio.h> 80 #include <string.h> 81 #include <errno.h> 82 #include <sys/utsname.h> 83 #include "test.h" 84 85 #define LARGE_LENGTH MAX_LENGTH + 1 86 #define MAX_LENGTH _UTSNAME_LENGTH - 1 87 88 static void cleanup(void); 89 static void setup(void); 90 91 char *TCID = "sethostname02"; 92 static char hostname[MAX_LENGTH]; 93 static char hname[MAX_LENGTH]; 94 static char largehost[LARGE_LENGTH]; 95 static struct test_case_t { 96 char *err_desc; /* error description */ 97 int exp_errno; /* Expected error no */ 98 char *exp_errval; /* Expected error value string */ 99 char *name; /* hostname */ 100 int len; /* length */ 101 } testcases[] = { 102 { 103 "Length is -ve", EINVAL, "EINVAL", hostname, -1}, { 104 "Length > max allowed size", EINVAL, "EINVAL", largehost, 105 sizeof(largehost)} 106 , 107 #ifndef UCLINUX 108 /* Skip since uClinux does not implement memory protection */ 109 { 110 "Invalid address ", EFAULT, "EFAULT", (void *)-1, 111 sizeof(hostname)} 112 #endif 113 }; 114 115 int TST_TOTAL = ARRAY_SIZE(testcases); 116 117 int main(int ac, char **av) 118 { 119 int i; 120 int lc; 121 122 tst_parse_opts(ac, av, NULL, NULL); 123 124 /* Do initial setup */ 125 setup(); 126 127 /* check for looping state if -i option is given */ 128 for (lc = 0; TEST_LOOPING(lc); lc++) { 129 tst_count = 0; 130 131 for (i = 0; i < TST_TOTAL; ++i) { 132 133 /* 134 * Test the system call. 135 */ 136 TEST(sethostname(testcases[i].name, testcases[i].len)); 137 138 if ((TEST_RETURN == -1) && 139 (TEST_ERRNO == testcases[i].exp_errno)) { 140 tst_resm(TPASS, "expected failure; Got %s", 141 testcases[i].exp_errval); 142 } else { 143 tst_resm(TFAIL, "call failed to produce " 144 "expected error; errno: %d : %s", 145 TEST_ERRNO, strerror(TEST_ERRNO)); 146 } 147 } 148 } 149 /* do cleanup and exit */ 150 cleanup(); 151 152 tst_exit(); 153 } 154 155 /* 156 * setup() - performs all one time setup for this test. 157 */ 158 void setup(void) 159 { 160 int ret; 161 162 tst_require_root(); 163 164 /* capture the signals */ 165 tst_sig(NOFORK, DEF_HANDLER, cleanup); 166 167 /* Keep the host name before starting the test */ 168 if ((ret = gethostname(hname, sizeof(hname))) < 0) { 169 tst_brkm(TBROK, NULL, "gethostname() failed while" 170 " getting current host name"); 171 } 172 173 /* Pause if the option was specified */ 174 TEST_PAUSE; 175 } 176 177 /* 178 * cleanup() - performs all one time cleanup for this test 179 * completion or premature exit. 180 */ 181 void cleanup(void) 182 { 183 int ret; 184 185 /* Set the host name back to original name */ 186 if ((ret = sethostname(hname, strlen(hname))) < 0) { 187 tst_resm(TWARN, "sethostname() failed while restoring" 188 " hostname to \"%s\"", hname); 189 } 190 191 } 192
