| /* |
| * Copyright (c) 2014 Fujitsu Ltd. |
| * Author: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| /* |
| * Description: |
| * Verify that, |
| * 1. llseek() succeeds to set the file pointer position to the current |
| * specified location, when 'whence' value is set to SEEK_CUR and the data |
| * read from the specified location should match the expected data. |
| * 2. llseek() succeeds to set the file pointer position to the end of |
| * the file when 'whence' value set to SEEK_END and any attempts to read |
| * from that position should return 0. |
| * |
| */ |
| |
| #define _GNU_SOURCE |
| |
| #include <unistd.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <utime.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <inttypes.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| #define TEST_FILE "testfile" |
| |
| static void setup(void); |
| static void cleanup(void); |
| |
| static void testfunc_seekcur(void); |
| static void testfunc_seekend(void); |
| |
| static void (*testfunc[])(void) = { testfunc_seekcur, testfunc_seekend }; |
| |
| char *TCID = "llseek03"; |
| int TST_TOTAL = 2; |
| |
| static size_t file_size; |
| |
| int main(int ac, char **av) |
| { |
| int i, lc; |
| const char *msg; |
| |
| msg = parse_opts(ac, av, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| |
| for (i = 0; i < TST_TOTAL; i++) |
| (*testfunc[i])(); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| int fd; |
| struct stat stat_buf; |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| tst_tmpdir(); |
| |
| TEST_PAUSE; |
| |
| fd = SAFE_CREAT(cleanup, TEST_FILE, 0644); |
| |
| #define STR "abcdefgh" |
| SAFE_WRITE(cleanup, 1, fd, STR, sizeof(STR) - 1); |
| |
| SAFE_FSTAT(cleanup, fd, &stat_buf); |
| |
| SAFE_CLOSE(cleanup, fd); |
| |
| file_size = stat_buf.st_size; |
| } |
| |
| static void testfunc_seekcur(void) |
| { |
| int fd; |
| static char read_buf[BUFSIZ]; |
| |
| /* reopen TEST_FILE and file offset will be 0 */ |
| fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDONLY); |
| |
| /* after read, file offset will be 4 */ |
| SAFE_READ(cleanup, 1, fd, read_buf, 4); |
| |
| TEST(lseek64(fd, (loff_t) 1, SEEK_CUR)); |
| |
| if (TEST_RETURN == (loff_t) -1) { |
| tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE); |
| goto cleanup_seekcur; |
| } |
| |
| if (TEST_RETURN != 5) { |
| tst_resm(TFAIL, "llseek return a incorrect file offset"); |
| goto cleanup_seekcur; |
| } |
| |
| memset(read_buf, 0, sizeof(read_buf)); |
| |
| /* the expected characters are "fgh" */ |
| SAFE_READ(cleanup, 1, fd, read_buf, 3); |
| |
| if (strcmp(read_buf, "fgh")) |
| tst_resm(TFAIL, "Read wrong bytes after llseek"); |
| else |
| tst_resm(TPASS, "test SEEK_SET for llseek success"); |
| |
| cleanup_seekcur: |
| SAFE_CLOSE(cleanup, fd); |
| } |
| |
| |
| static void testfunc_seekend(void) |
| { |
| int fd; |
| ssize_t nread; |
| static char read_buf[BUFSIZ]; |
| |
| /* reopen TEST_FILE and file offset will be 0 */ |
| fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDONLY); |
| |
| TEST(lseek64(fd, (loff_t) 0, SEEK_END)); |
| |
| if (TEST_RETURN == (loff_t) -1) { |
| tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE); |
| goto cleanup_seekend; |
| } |
| |
| if (TEST_RETURN != (long)file_size) { |
| tst_resm(TFAIL, "llseek return a incorrect file offset"); |
| goto cleanup_seekend; |
| } |
| |
| memset(read_buf, 0, sizeof(read_buf)); |
| |
| nread = SAFE_READ(cleanup, 0, fd, read_buf, file_size); |
| if (nread > 0) |
| tst_resm(TFAIL, "Read bytes after llseek to end of file"); |
| else |
| tst_resm(TPASS, "test SEEK_END for llseek success"); |
| |
| cleanup_seekend: |
| SAFE_CLOSE(cleanup, fd); |
| } |
| |
| static void cleanup(void) |
| { |
| tst_rmdir(); |
| } |