296 lines
7.4 KiB
C
296 lines
7.4 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Test Name: pread02
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*
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* Test Description:
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* Verify that,
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* 1) pread() fails when attempted to read from an unnamed pipe.
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* 2) pread() fails if the specified offset position was invalid.
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*
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* Expected Result:
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* 1) pread() should return -1 and set errno to ESPIPE.
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* 2) pread() should return -1 and set errno to EINVAL.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Create a temporary directory.
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* Pause for SIGUSR1 if option specified.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* if errno set == expected errno
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* Issue sys call fails with expected return value and errno.
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* Otherwise,
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* Issue sys call fails with unexpected errno.
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* Otherwise,
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* Issue sys call returns unexpected value.
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*
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Delete the temporary directory(s)/file(s) created.
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*
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* Usage: <for command-line>
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* pread02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* RESTRICTIONS:
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* None.
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*/
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#define _XOPEN_SOURCE 500
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include "test.h"
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#include "safe_macros.h"
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#define TEMPFILE "pread_file"
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#define K1 1024
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#define NBUFS 4
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char *TCID = "pread02";
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int TST_TOTAL = 2;
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char *write_buf[NBUFS]; /* buffer to hold data to be written */
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char *read_buf[NBUFS]; /* buffer to hold data read from file */
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int pfd[2]; /* pair of file descriptors */
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int fd1;
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void setup(); /* Main setup function of test */
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void cleanup(); /* cleanup function for the test */
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int setup1(); /* setup function for test #1 */
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int setup2(); /* setup function for test #2 */
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int no_setup();
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void init_buffers(); /* function to initialize/allocate buffers */
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struct test_case_t { /* test case struct. to hold ref. test cond's */
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int fd;
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size_t nb;
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off_t offst;
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char *desc;
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int exp_errno;
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int (*setupfunc) ();
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} Test_cases[] = {
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{
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1, K1, 0, "file descriptor is a PIPE or FIFO", ESPIPE, setup1}, {
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2, K1, -1, "specified offset is -ve or invalid", EINVAL, setup2}, {
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0, 0, 0, NULL, 0, no_setup}
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};
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int main(int ac, char **av)
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{
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int lc;
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int i;
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int fildes; /* file descriptor of test file */
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size_t nbytes; /* no. of bytes to be written */
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off_t offset; /* offset position in the specified file */
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char *test_desc; /* test specific error message */
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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/* loop through the test cases */
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for (i = 0; Test_cases[i].desc != NULL; i++) {
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fildes = Test_cases[i].fd;
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test_desc = Test_cases[i].desc;
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nbytes = Test_cases[i].nb;
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offset = Test_cases[i].offst;
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if (fildes == 1) {
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fildes = pfd[0];
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} else if (fildes == 2) {
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fildes = fd1;
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}
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/*
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* Call pread() with the specified file descriptor,
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* no. of bytes to be read from specified offset.
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* and verify that call should fail with appropriate
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* errno set.
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*/
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TEST(pread(fildes, read_buf[0], nbytes, offset));
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/* Check for the return code of pread() */
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if (TEST_RETURN != -1) {
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tst_brkm(TFAIL, cleanup, "pread() returned "
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"%ld, expected -1, errno:%d",
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TEST_RETURN, Test_cases[i].exp_errno);
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}
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/*
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* Verify whether expected errno is set.
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*/
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if (TEST_ERRNO == Test_cases[i].exp_errno) {
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tst_resm(TPASS, "pread() fails, %s, errno:%d",
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test_desc, TEST_ERRNO);
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} else {
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tst_resm(TFAIL, "pread() fails, %s, unexpected "
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"errno:%d, expected:%d", test_desc,
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TEST_ERRNO, Test_cases[i].exp_errno);
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}
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}
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}
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cleanup();
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tst_exit();
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}
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/*
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* setup() - performs all ONE TIME setup for this test.
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* Initialize/allocate write buffer.
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* Call individual setup function.
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*/
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void setup(void)
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{
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int i;
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tst_sig(FORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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/* Allocate/Initialize the read/write buffer with known data */
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init_buffers();
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/* Call individual setup functions */
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for (i = 0; Test_cases[i].desc != NULL; i++) {
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Test_cases[i].setupfunc();
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}
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}
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/*
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* no_setup() - This function simply returns.
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*/
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int no_setup(void)
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{
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return 0;
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}
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/*
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* setup1() - setup function for a test condition for which pread()
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* returns -ve value and sets errno to ESPIPE.
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*
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* Create an unnamed pipe using pipe().
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* Write some known data to the write end of the pipe.
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* return 0.
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*/
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int setup1(void)
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{
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/* Create a pair of unnamed pipe */
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SAFE_PIPE(cleanup, pfd);
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/* Write known data (0's) of K1 bytes */
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if (write(pfd[1], write_buf[0], K1) != K1) {
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tst_brkm(TBROK, cleanup, "write to pipe failed: errno=%d : %s",
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errno, strerror(errno));
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}
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return 0;
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}
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/*
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* setup2 - setup function for a test condition for which pread()
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* returns -ve value and sets errno to EINVAL.
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*
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* Create a temporary directory and a file under it.
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* return 0.
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*/
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int setup2(void)
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{
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tst_tmpdir();
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/* Creat a temporary file used for mapping */
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if ((fd1 = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) {
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tst_brkm(TBROK, cleanup, "open() on %s Failed, errno=%d : %s",
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TEMPFILE, errno, strerror(errno));
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}
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return 0;
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}
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/*
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* init_buffers() - allocate/Initialize write_buf array.
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*
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* Allocate read/write buffer.
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* Fill the write buffer with the following data like,
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* write_buf[0] has 0's, write_buf[1] has 1's, write_buf[2] has 2's
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* write_buf[3] has 3's.
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*/
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void init_buffers(void)
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{
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int count; /* counter variable for loop */
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/* Allocate and Initialize write buffer with known data */
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for (count = 0; count < NBUFS; count++) {
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write_buf[count] = malloc(K1);
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read_buf[count] = malloc(K1);
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if ((write_buf[count] == NULL) || (read_buf[count] == NULL)) {
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tst_brkm(TBROK, NULL,
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"malloc() failed on read/write buffers");
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}
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memset(write_buf[count], count, K1);
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}
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}
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/*
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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*
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* Deallocate the memory allocated to read/write buffers.
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* Close the temporary file.
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* Remove the temporary directory created.
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*/
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void cleanup(void)
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{
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int count;
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/* Free the memory allocated for the read/write buffer */
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for (count = 0; count < NBUFS; count++) {
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free(write_buf[count]);
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free(read_buf[count]);
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}
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/* Close the temporary file created in setup2 */
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SAFE_CLOSE(NULL, fd1);
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tst_rmdir();
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}
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