147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* 07/2001 John George
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*/
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/*\
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* [Description]
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*
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* Verify that:
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*
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* - truncate(2) returns -1 and sets errno to EACCES if search/write
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* permission denied for the process on the component of the path prefix
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* or named file.
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* - truncate(2) returns -1 and sets errno to ENOTDIR if the component of
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* the path prefix is not a directory.
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* - truncate(2) returns -1 and sets errno to EFAULT if pathname points
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* outside user's accessible address space.
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* - truncate(2) returns -1 and sets errno to ENAMETOOLONG if the component
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* of a pathname exceeded 255 characters or entire pathname exceeds 1023
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* characters.
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* - truncate(2) returns -1 and sets errno to ENOENT if the named file
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* does not exist.
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* - truncate(2) returns -1 and sets errno to EISDIR if the named file
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* is a directory.
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* - truncate(2) returns -1 and sets errno to EFBIG if the argument length
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* is larger than the maximum file size.
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* - truncate(2) returns -1 and sets errno to ELOOP if too many symbolic
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* links were encountered in translating the pathname.
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include <pwd.h>
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#include <sys/resource.h>
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#include "tst_test.h"
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#define TEST_FILE1 "testfile"
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#define TEST_FILE2 "t_file/testfile"
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#define TEST_FILE3 "testfile3"
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#define TEST_SYM1 "testsymlink1"
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#define TEST_SYM2 "testsymlink2"
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#define TEST_DIR1 "testdir"
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#define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
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#define NEW_MODE S_IRUSR | S_IRGRP | S_IROTH
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#define DIR_MODE S_IRWXU
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#define TRUNC_LEN 256
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#define MAX_FSIZE (16*1024*1024)
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static char long_pathname[PATH_MAX + 2];
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static struct test_case_t {
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char *pathname;
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off_t length;
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int exp_errno;
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} test_cases[] = {
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{ TEST_FILE1, TRUNC_LEN, EACCES },
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{ TEST_FILE2, TRUNC_LEN, ENOTDIR },
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{ NULL, TRUNC_LEN, EFAULT },
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{ long_pathname, TRUNC_LEN, ENAMETOOLONG },
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{ "", TRUNC_LEN, ENOENT },
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{ TEST_DIR1, TRUNC_LEN, EISDIR },
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{ TEST_FILE3, MAX_FSIZE*2, EFBIG },
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{ TEST_SYM1, TRUNC_LEN, ELOOP }
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};
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static void setup(void)
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{
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struct passwd *ltpuser;
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struct rlimit rlim = {
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.rlim_cur = MAX_FSIZE,
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.rlim_max = MAX_FSIZE,
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};
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sigset_t signalset;
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unsigned int n;
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ltpuser = SAFE_GETPWNAM("nobody");
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SAFE_SETEUID(ltpuser->pw_uid);
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SAFE_TOUCH(TEST_FILE1, NEW_MODE, NULL);
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SAFE_TOUCH("t_file", FILE_MODE, NULL);
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memset(long_pathname, 'a', PATH_MAX + 1);
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SAFE_MKDIR(TEST_DIR1, DIR_MODE);
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SAFE_TOUCH(TEST_FILE3, FILE_MODE, NULL);
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SAFE_SYMLINK(TEST_SYM1, TEST_SYM2);
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SAFE_SYMLINK(TEST_SYM2, TEST_SYM1);
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SAFE_SETRLIMIT(RLIMIT_FSIZE, &rlim);
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SAFE_SIGEMPTYSET(&signalset);
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SAFE_SIGADDSET(&signalset, SIGXFSZ);
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SAFE_SIGPROCMASK(SIG_BLOCK, &signalset, NULL);
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for (n = 0; n < ARRAY_SIZE(test_cases); n++) {
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if (!test_cases[n].pathname)
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test_cases[n].pathname = tst_get_bad_addr(NULL);
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}
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}
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static void verify_truncate(unsigned int n)
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{
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struct test_case_t *tc = &test_cases[n];
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TEST(truncate(tc->pathname, tc->length));
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if (TST_RET == 0) {
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tst_res(TFAIL, "truncate() succeeded when failure expected");
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return;
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}
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if (TST_RET != -1) {
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tst_res(TFAIL, "truncate() returned invalid value %ld",
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TST_RET);
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return;
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}
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if (TST_ERR == tc->exp_errno) {
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tst_res(TPASS | TTERRNO, "truncate() failed as expected");
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} else {
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tst_res(TFAIL | TTERRNO,
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"truncate() failed unexpectedly; expected: %d - %s",
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tc->exp_errno, strerror(tc->exp_errno));
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}
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}
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static struct tst_test test = {
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.needs_root = 1,
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.needs_tmpdir = 1,
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.setup = setup,
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.tcnt = ARRAY_SIZE(test_cases),
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.test = verify_truncate,
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};
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