1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * Copyright (c) 2017 Xiao Yang <yangx.jy (at) cn.fujitsu.com> 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 * DESCRIPTION 22 * 1) Test for EPERM when the super-user tries to increase RLIMIT_NOFILE 23 * beyond the system limit. 24 * 2) Test for EINVAL when rlim->rlim_cur is greater than rlim->rlim_max. 25 */ 26 27 #include <errno.h> 28 #include <sys/time.h> 29 #include <sys/resource.h> 30 #include <linux/fs.h> 31 #include "tst_test.h" 32 33 #if !defined(NR_OPEN) 34 // Taken from definition in /usr/include/linux/fs.h 35 # define NR_OPEN (1024*1024) 36 #endif 37 38 static struct rlimit rlim1, rlim2; 39 40 static struct tcase { 41 struct rlimit *rlimt; 42 int exp_err; 43 } tcases[] = { 44 {&rlim1, EPERM}, 45 {&rlim2, EINVAL} 46 }; 47 48 static void verify_setrlimit(unsigned int n) 49 { 50 struct tcase *tc = &tcases[n]; 51 52 TEST(setrlimit(RLIMIT_NOFILE, tc->rlimt)); 53 if (TST_RET != -1) { 54 tst_res(TFAIL, "call succeeded unexpectedly"); 55 return; 56 } 57 58 if (TST_ERR != tc->exp_err) { 59 tst_res(TFAIL | TTERRNO, "setrlimit() should fail with %s, got", 60 tst_strerrno(tc->exp_err)); 61 } else { 62 tst_res(TPASS | TTERRNO, "setrlimit() failed as expected"); 63 } 64 } 65 66 static void setup(void) 67 { 68 SAFE_GETRLIMIT(RLIMIT_NOFILE, &rlim1); 69 rlim2.rlim_max = rlim1.rlim_cur; 70 rlim2.rlim_cur = rlim1.rlim_max + 1; 71 rlim1.rlim_max = NR_OPEN + 1; 72 } 73 74 static struct tst_test test = { 75 .setup = setup, 76 .tcnt = ARRAY_SIZE(tcases), 77 .test = verify_setrlimit, 78 .needs_root = 1 79 }; 80
