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      1 /*
      2 * Copyright (c) 2016 Fujitsu Ltd.
      3 * Author: Jinbao Huang <huangjb.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 version 2 of the GNU General Public License as
      7 * published by the Free Software Foundation.
      8 *
      9 * This program is distributed in the hope that it would be useful, but
     10 * WITHOUT ANY WARRANTY;  without even the implied warranty of
     11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     12 *
     13 * You should have received a copy of the GNU General Public License
     14 * alone with this program.
     15 */
     16 
     17 /*
     18 * Test Name: lgetxattr01
     19 *
     20 * Description:
     21 * The testcase checks the basic functionality of the lgetxattr(2).
     22 * In the case of a symbolic link, we only get the value of the
     23 * extended attribute related to the link itself by name.
     24 *
     25 */
     26 
     27 #include "config.h"
     28 #include <errno.h>
     29 #include <sys/types.h>
     30 #include <string.h>
     31 
     32 #ifdef HAVE_SYS_XATTR_H
     33 # include <sys/xattr.h>
     34 #endif
     35 
     36 #include "tst_test.h"
     37 
     38 #ifdef HAVE_SYS_XATTR_H
     39 
     40 #define SECURITY_KEY1   "security.ltptest1"
     41 #define SECURITY_KEY2   "security.ltptest2"
     42 #define VALUE1   "test1"
     43 #define VALUE2   "test2"
     44 
     45 static void set_xattr(char *path, char *key, void *value, size_t size)
     46 {
     47 	int res;
     48 
     49 	res = lsetxattr(path, key, value, size, XATTR_CREATE);
     50 	if (res == -1) {
     51 		if (errno == ENOTSUP) {
     52 			tst_brk(TCONF,
     53 				"no xattr support in fs or mounted "
     54 				"without user_xattr option");
     55 		} else {
     56 			tst_brk(TBROK | TERRNO, "lsetxattr(%s) failed", key);
     57 		}
     58 	}
     59 }
     60 
     61 static void setup(void)
     62 {
     63 	SAFE_TOUCH("testfile", 0644, NULL);
     64 	SAFE_SYMLINK("testfile", "symlink");
     65 
     66 	set_xattr("testfile", SECURITY_KEY1, VALUE1, strlen(VALUE1));
     67 	set_xattr("symlink", SECURITY_KEY2, VALUE2, strlen(VALUE2));
     68 }
     69 
     70 static void verify_lgetxattr(void)
     71 {
     72 	int size = 64;
     73 	char buf[size];
     74 
     75 	TEST(lgetxattr("symlink", SECURITY_KEY2, buf, size));
     76 	if (TEST_RETURN == -1) {
     77 		tst_res(TFAIL | TTERRNO, "lgetxattr() failed");
     78 		goto next;
     79 	}
     80 
     81 	if (TEST_RETURN != strlen(VALUE2)) {
     82 		tst_res(TFAIL, "lgetxattr() got unexpected value size");
     83 		goto next;
     84 	}
     85 
     86 	if (!strncmp(buf, VALUE2, TEST_RETURN))
     87 		tst_res(TPASS, "lgetxattr() got expected value");
     88 	else
     89 		tst_res(TFAIL, "lgetxattr() got unexpected value");
     90 
     91 next:
     92 	TEST(lgetxattr("symlink", SECURITY_KEY1, buf, size));
     93 
     94 	if (TEST_RETURN != -1) {
     95 		tst_res(TFAIL, "lgetxattr() succeeded unexpectedly");
     96 		return;
     97 	}
     98 
     99 	if (TEST_ERRNO == ENODATA) {
    100 		tst_res(TPASS | TTERRNO, "lgetxattr() failed as expected");
    101 	} else {
    102 		tst_res(TFAIL | TTERRNO, "lgetxattr() failed unexpectedly,"
    103 			"expected %s", tst_strerrno(ENODATA));
    104 	}
    105 }
    106 
    107 static struct tst_test test = {
    108 	.needs_tmpdir = 1,
    109 	.needs_root = 1,
    110 	.test_all = verify_lgetxattr,
    111 	.setup = setup
    112 };
    113 
    114 #else
    115 	TST_TEST_TCONF("<sys/xattr.h> does not exist.");
    116 #endif /* HAVE_SYS_XATTR_H */
    117