139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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* AUTHOR : Richard Logan
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* CO-PILOT : William Roske
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* Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*\
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* [Description]
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*
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* Negative test cases for link(2).
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*
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* This test program should contain test cases where link will fail regardless
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* of who executed it (i.e. joe-user or root)
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*/
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#include <pwd.h>
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#include <sys/param.h>
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#include <sys/mman.h>
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#include "tst_test.h"
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#define NOBODY_USER 99
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#define MODE_TO1 S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IXOTH|S_IROTH
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#define MODE_TO2 S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IXOTH|S_IROTH|S_IWOTH
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#define MODE_TE S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH
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#define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO
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#define DIR_TEMP "dir2/testdir_1"
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static char longpath[PATH_MAX + 2];
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static struct tcase {
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char *file1;
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char *desc1;
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char *file2;
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char *desc2;
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int exp_errno;
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} tcases[] = {
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/* first path is invalid */
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{"nonexistfile", "non-existent file", "nefile", "nefile", ENOENT},
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{"", "path is empty string", "nefile", "nefile", ENOENT},
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{"neefile/file", "path contains a non-existent file", "nefile", "nefile", ENOENT},
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{"regfile/file", "path contains a regular file", "nefile", "nefile", ENOTDIR},
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{longpath, "pathname too long", "nefile", "nefile", ENAMETOOLONG},
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{NULL, "invalid address", "nefile", "nefile", EFAULT},
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/* second path is invalid */
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{"regfile", "regfile", "", "empty string", ENOENT},
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{"regfile", "regfile", "neefile/file", "path contains a non-existent file", ENOENT},
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{"regfile", "regfile", "file/file", "path contains a regular file", ENOENT},
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{"regfile", "regfile", longpath, "pathname too long", ENAMETOOLONG},
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{"regfile", "regfile", NULL, "invalid address", EFAULT},
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/* two existing files */
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{"regfile", "regfile", "regfile2", "regfile2", EEXIST},
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{"dir1/oldpath", "Write access diretory", "dir1/newpath", "newpath", EACCES},
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{"dir2/testdir_1/tfile_2", "Search access diretory", "dir2/testdir_1/new_tfile_2",
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"dir2/testdir_1/new_tfile_2", EACCES},
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};
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static void verify_link(unsigned int i)
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{
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struct passwd *nobody_pwd;
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struct tcase *tc = &tcases[i];
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if (tc->exp_errno == EACCES) {
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SAFE_SETEUID(0);
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if (strcmp(tc->desc1, "Write access diretory") == 0) {
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/* Modify mode permissions on test directory */
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SAFE_CHMOD("dir1", MODE_TO1);
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SAFE_TOUCH(tc->file1, 0777, NULL);
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} else if (strcmp(tc->desc1, "Search access diretory") == 0) {
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/* Modify mode permissions on test directory */
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SAFE_CHMOD("dir2", MODE_TO2);
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SAFE_TOUCH(tc->file1, 0666, NULL);
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/* Modify mode permissions on test directory - test conditions */
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SAFE_CHMOD(DIR_TEMP, MODE_TE);
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}
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nobody_pwd = SAFE_GETPWNAM("nobody");
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SAFE_SETEUID(nobody_pwd->pw_uid);
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}
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TEST(link(tc->file1, tc->file2));
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if (TST_RET == -1) {
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if (TST_ERR == tc->exp_errno) {
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tst_res(TPASS | TTERRNO,
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"link(<%s>, <%s>)",
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tc->desc1, tc->desc2);
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} else {
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tst_res(TFAIL | TTERRNO,
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"link(<%s>, <%s>) Failed "
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"expected errno: %d",
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tc->desc1, tc->desc2,
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tc->exp_errno);
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}
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} else {
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tst_res(TFAIL,
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"link(<%s>, <%s>) returned %ld, "
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"expected -1, errno:%d",
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tc->desc1, tc->desc2, TST_RET,
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tc->exp_errno);
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}
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}
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static void setup(void)
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{
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unsigned int i;
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memset(longpath, 'a', PATH_MAX+1);
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SAFE_TOUCH("regfile", 0777, NULL);
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SAFE_TOUCH("regfile2", 0777, NULL);
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SAFE_MKDIR("dir", 0777);
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SAFE_MKDIR("dir1", MODE_RWX);
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SAFE_MKDIR("dir2", MODE_RWX);
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SAFE_MKDIR(DIR_TEMP, MODE_RWX);
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for (i = 0; i < ARRAY_SIZE(tcases); i++) {
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struct tcase *tc = &tcases[i];
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if (!tc->file1)
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tc->file1 = tst_get_bad_addr(NULL);
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if (!tc->file2)
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tc->file2 = tst_get_bad_addr(NULL);
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}
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.test = verify_link,
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.setup = setup,
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.needs_tmpdir = 1,
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.needs_root = 1,
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};
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