1 /* 2 * Copyright (C) 2015 Cedric Hnyda ced.hnyda@gmail.com 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 22 * 23 */ 24 25 /* 26 * AUTHOR : Cédric Hnyda 27 * DATE STARTED : 06/13/2015 28 * 29 * Calls getrandom(2) after having limited the number of available file 30 * descriptors to 3 and expects success. 31 */ 32 33 #include <sys/resource.h> 34 #include "lapi/getrandom.h" 35 #include "lapi/syscalls.h" 36 #include "tst_test.h" 37 38 static void verify_getrandom(void) 39 { 40 char buf[128]; 41 struct rlimit lold, lnew; 42 43 SAFE_GETRLIMIT(RLIMIT_NOFILE, &lold); 44 lnew.rlim_max = lold.rlim_max; 45 lnew.rlim_cur = 3; 46 SAFE_SETRLIMIT(RLIMIT_NOFILE, &lnew); 47 48 TEST(tst_syscall(__NR_getrandom, buf, 100, 0)); 49 if (TEST_RETURN == -1) 50 tst_res(TFAIL | TTERRNO, "getrandom failed"); 51 else 52 tst_res(TPASS, "getrandom returned %ld", TEST_RETURN); 53 54 SAFE_SETRLIMIT(RLIMIT_NOFILE, &lold); 55 } 56 57 static struct tst_test test = { 58 .test_all = verify_getrandom, 59 }; 60