| /* |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. |
| */ |
| |
| /* |
| * DESCRIPTION |
| * Testcase to check the basic functionality of the getcwd(2) system call. |
| * 1) getcwd(2) works fine if buf and size are valid. |
| * 2) getcwd(2) works fine if buf points to NULL and size is set to 0. |
| * 3) getcwd(2) works fine if buf points to NULL and size is greater than strlen(path). |
| */ |
| |
| #include <errno.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| |
| #include "tst_test.h" |
| |
| static char exp_buf[PATH_MAX]; |
| static char buffer[PATH_MAX]; |
| |
| static struct t_case { |
| char *buf; |
| size_t size; |
| } tcases[] = { |
| {buffer, sizeof(buffer)}, |
| {NULL, 0}, |
| {NULL, PATH_MAX} |
| }; |
| |
| static int dir_exists(const char *dirpath) |
| { |
| struct stat sb; |
| |
| if (!stat(dirpath, &sb) && S_ISDIR(sb.st_mode)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static const char *get_tmpdir_path(void) |
| { |
| char *tmpdir = "/tmp"; |
| |
| if (dir_exists(tmpdir)) |
| goto done; |
| |
| /* fallback to $TMPDIR */ |
| tmpdir = getenv("TMPDIR"); |
| if (!tmpdir) |
| tst_brk(TBROK | TERRNO, "Failed to get $TMPDIR"); |
| |
| if (tmpdir[0] != '/') |
| tst_brk(TBROK, "$TMPDIR must be an absolute path"); |
| |
| if (!dir_exists(tmpdir)) |
| tst_brk(TBROK | TERRNO, "TMPDIR '%s' doesn't exist", tmpdir); |
| |
| done: |
| return tmpdir; |
| } |
| |
| static void verify_getcwd(unsigned int n) |
| { |
| struct t_case *tc = &tcases[n]; |
| char *res = NULL; |
| |
| errno = 0; |
| res = getcwd(tc->buf, tc->size); |
| TEST_ERRNO = errno; |
| if (!res) { |
| tst_res(TFAIL | TTERRNO, "getcwd() failed"); |
| goto end; |
| } |
| |
| if (strcmp(exp_buf, res)) { |
| tst_res(TFAIL, "getcwd() returned unexpected directory: %s, " |
| "expected: %s", res, exp_buf); |
| goto end; |
| } |
| |
| tst_res(TPASS, "getcwd() returned expected directory: %s", res); |
| |
| end: |
| if (!tc->buf) |
| free(res); |
| } |
| |
| static void setup(void) |
| { |
| const char *tmpdir = get_tmpdir_path(); |
| |
| SAFE_CHDIR(tmpdir); |
| |
| if (!realpath(tmpdir, exp_buf)) |
| tst_brk(TBROK | TERRNO, "realpath() failed"); |
| |
| tst_res(TINFO, "Expected path '%s'", exp_buf); |
| } |
| |
| static struct tst_test test = { |
| .setup = setup, |
| .tcnt = ARRAY_SIZE(tcases), |
| .test = verify_getcwd |
| }; |