1 /* 2 * Copyright (c) 2016 RT-RK Institute for Computer Based Systems 3 * Author: Dejan Jovicevic <dejan.jovicevic (at) rt-rk.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. 17 */ 18 19 /* 20 * Test Name: listxattr03 21 * 22 * Description: 23 * An empty buffer of size zero can return the current size of the list 24 * of extended attribute names, which can be used to estimate a suitable buffer. 25 */ 26 27 #include "config.h" 28 #include <errno.h> 29 #include <sys/types.h> 30 31 #ifdef HAVE_SYS_XATTR_H 32 # include <sys/xattr.h> 33 #endif 34 35 #include "tst_test.h" 36 37 #ifdef HAVE_SYS_XATTR_H 38 39 #define SECURITY_KEY "security.ltptest" 40 #define VALUE "test" 41 #define VALUE_SIZE (sizeof(VALUE) - 1) 42 43 static const char * const filename[] = {"testfile1", "testfile2"}; 44 45 static int check_suitable_buf(const char *name, long size) 46 { 47 int n; 48 char buf[size]; 49 50 n = listxattr(name, buf, sizeof(buf)); 51 52 return n != -1; 53 } 54 55 static void verify_listxattr(unsigned int n) 56 { 57 const char *name = filename[n]; 58 59 TEST(listxattr(name, NULL, 0)); 60 if (TEST_RETURN == -1) { 61 tst_res(TFAIL | TTERRNO, "listxattr() failed"); 62 return; 63 } 64 65 if (check_suitable_buf(name, TEST_RETURN)) 66 tst_res(TPASS, "listxattr() succeed with suitable buffer"); 67 else 68 tst_res(TFAIL, "listxattr() failed with small buffer"); 69 } 70 71 static void setup(void) 72 { 73 SAFE_TOUCH(filename[0], 0644, NULL); 74 75 SAFE_TOUCH(filename[1], 0644, NULL); 76 77 SAFE_SETXATTR(filename[1], SECURITY_KEY, VALUE, VALUE_SIZE, XATTR_CREATE); 78 } 79 80 static struct tst_test test = { 81 .needs_tmpdir = 1, 82 .needs_root = 1, 83 .test = verify_listxattr, 84 .tcnt = ARRAY_SIZE(filename), 85 .setup = setup, 86 }; 87 88 #else /* HAVE_SYS_XATTR_H */ 89 TST_TEST_TCONF("<sys/xattr.h> does not exist."); 90 #endif 91
