Hi!
> new file mode 100644
> index 0000000..99d0c06
> --- /dev/null
> +++ b/testcases/kernel/syscalls/llseek/llseek03.c
> @@ -0,0 +1,214 @@
> +/*
> + * Copyright (c) 2014 Fujitsu Ltd.
> + * Author: Xiaoguang Wang <wangxg.f...@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 "usctest.h"
> +#include "safe_macros.h"
> +
> +#define TEST_FILE "testfile"
> +
> +static void setup(int ac, char **av);
> +static void cleanup(void);
> +
> +static void setup_seekcur(void);
> +static void testfunc_seekcur(void);
> +static void cleanup_seekcur(void);
> +
> +static void setup_seekend(void);
> +static void testfunc_seekend(void);
> +static void cleanup_seekend(void);
> +
> +static struct test_case_t {
> + int whence;
> + void (*setup)(void);
> + void (*testfunc)(void);
> + void (*cleanup)(void);
> +} test_cases[] = {
> + { SEEK_CUR, setup_seekcur, testfunc_seekcur, cleanup_seekcur},
> + { SEEK_END, setup_seekend, testfunc_seekend, cleanup_seekend},
> +};
> +
> +char *TCID = "llseek03";
> +int TST_TOTAL = ARRAY_SIZE(test_cases);
> +static char read_buf[BUFSIZ];
> +
> +static int fd;
> +static size_t file_size;
> +
> +int main(int ac, char **av)
> +{
> + int lc;
> + int i;
> +
> + setup(ac, av);
> +
> + for (lc = 0; TEST_LOOPING(lc); lc++) {
> + tst_count = 0;
> +
> + for (i = 0; i < TST_TOTAL; i++) {
> + if (test_cases[i].setup)
> + test_cases[i].setup();
> + if (test_cases[i].testfunc)
> + test_cases[i].testfunc();
> + if (test_cases[i].cleanup)
> + test_cases[i].cleanup();
> + }
> + }
> +
> + cleanup();
> + tst_exit();
> +}
> +
> +static void setup(int ac, char **av)
> +{
> + char *msg;
> + char write_buf[BUFSIZ];
> + struct stat stat_buf;
> +
> + msg = parse_opts(ac, av, NULL, NULL);
> + if (msg != NULL)
> + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
> +
> + tst_sig(NOFORK, DEF_HANDLER, cleanup);
> +
> + tst_tmpdir();
> +
> + TEST_PAUSE;
> +
> + if (strcpy(write_buf, "abcdefgh") != write_buf)
> + tst_brkm(TBROK | TERRNO, NULL, "strcpy failed");
strcpy() does not fail.
> + fd = SAFE_CREAT(cleanup, TEST_FILE, 0644);
> +
> + SAFE_WRITE(cleanup, 1, fd, write_buf, strlen(write_buf));
Moreover you don't have to copy the string to the buffer to pass it
here. You can do:
#define STR "abcdefgh"
SAFE_WRITE(cleanup, 1, fd, STR, sizeof(STR) - 1);
> + if (fstat(fd, &stat_buf) < 0) {
> + tst_brkm(TBROK | TERRNO, cleanup,
> + "fstat of %s failed", TEST_FILE);
> + }
> + file_size = stat_buf.st_size;
> +
> + SAFE_CLOSE(cleanup, fd);
> +}
> +
> +static void setup_seekcur(void)
> +{
> + /* 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);
> +}
> +
> +static void testfunc_seekcur(void)
> +{
> + TEST(lseek64(fd, (loff_t) 1, SEEK_CUR));
> +
> + if (TEST_RETURN == (loff_t) -1) {
> + tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE);
> + return;
> + }
> +
> + if (TEST_RETURN != 5) {
> + tst_resm(TFAIL, "llseek return a incorrect file offset");
> + return;
> + }
> +
> + 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, "test SEEK_SET for llseek failed");
This message should bettter describe what has happened.
"Read wrong bytes after llseek"
> + else
> + tst_resm(TPASS, "test SEEK_SET for llseek success");
> +}
> +
> +static void cleanup_seekcur(void)
> +{
> + SAFE_CLOSE(cleanup, fd);
> +}
> +
> +static void setup_seekend(void)
> +{
> + /* reopen TEST_FILE and file offset will be 0 */
> + fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDONLY);
> +}
> +
> +static void testfunc_seekend(void)
> +{
> + ssize_t nread;
> +
> + TEST(lseek64(fd, (loff_t) 0, SEEK_END));
> +
> + if (TEST_RETURN == (loff_t) -1) {
> + tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE);
> + return;
> + }
> +
> + if (TEST_RETURN != file_size) {
> + tst_resm(TFAIL, "llseek return a incorrect file offset");
> + return;
> + }
> +
> + memset(read_buf, 0, sizeof(read_buf));
> +
> + nread = SAFE_READ(cleanup, 0, fd, read_buf, file_size);
> + if (nread > 0)
> + tst_resm(TFAIL, "test SEEK_END for llseek failed");
Here as well:
"Read bytes after llseek to end of file."
> + else
> + tst_resm(TPASS, "test SEEK_END for llseek success");
> +
> +}
> +static void cleanup_seekend(void)
> +{
> + SAFE_CLOSE(cleanup, fd);
> +}
> +
> +static void cleanup(void)
> +{
> + TEST_CLEANUP;
> +
> + tst_rmdir();
> +}
--
Cyril Hrubis
chru...@suse.cz
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