337 lines
8.9 KiB
C
337 lines
8.9 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: pwrite01
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*
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* Test Description:
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* Verify the functionality of pwrite() by writing known data using pwrite()
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* to the file at various specified offsets and later read from the file from
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* various specified offsets, comparing the data written aganist the data
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* read using read().
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*
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* Expected Result:
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* pwrite() should succeed to write the expected no. of bytes of data and
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* the data written at specified offsets should match aganist the data read
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* from that offset.
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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 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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* Log the errno and Issue a FAIL message.
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* Otherwise,
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* Verify the Functionality of system call
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* if successful,
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* Issue Functionality-Pass message.
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* Otherwise,
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* Issue Functionality-Fail message.
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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 created.
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*
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* Usage: <for command-line>
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* pwrite01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -f : Turn off functionality Testing.
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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 <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "test.h"
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#include "safe_macros.h"
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#define _XOPEN_SOURCE 500
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#define TEMPFILE "pwrite_file"
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#define K1 1024
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#define K2 (K1 * 2)
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#define K3 (K1 * 3)
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#define K4 (K1 * 4)
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#define NBUFS 4
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char *TCID = "pwrite01";
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int TST_TOTAL = 1;
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int fildes; /* file descriptor for tempfile */
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char *write_buf[NBUFS]; /* buffer to hold data to be written */
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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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void l_seek(int, off_t, int, off_t); /* function to call lseek() */
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void init_buffers(); /* function to initialize/allocate buffers */
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void check_file_contents(); /* function to verify the contents of file */
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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 nwrite; /* no. of bytes written by pwrite() */
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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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/*
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* Call pwrite() to write K1 bytes of data (0's) at offset 0
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* of temporary file
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*/
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nwrite = pwrite(fildes, write_buf[0], K1, 0);
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/* Check for the return value of pwrite() */
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if (nwrite != K1) {
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tst_resm(TFAIL, "pwrite() at offset 0 failed, errno=%d "
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": %s", errno, strerror(errno));
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continue;
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}
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/* We should still be at offset 0. */
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l_seek(fildes, 0, SEEK_CUR, 0);
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/*
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* Now, lseek() to a non K boundary,
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* just to be different.
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*/
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l_seek(fildes, K1 / 2, SEEK_SET, K1 / 2);
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/*
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* Again, pwrite() K1 of data (2's) at offset K2 of
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* temporary file.
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*/
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nwrite = pwrite(fildes, write_buf[2], K1, K2);
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if (nwrite != K1) {
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tst_resm(TFAIL, "pwrite() failed to "
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"write at %d off. on %s, errno=%d : %s",
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K2, TEMPFILE, errno, strerror(errno));
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continue;
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}
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/* We should still be at our non K boundary. */
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l_seek(fildes, 0, SEEK_CUR, K1 / 2);
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/* lseek() to an offset of K3. */
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l_seek(fildes, K3, SEEK_SET, K3);
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/*
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* Using write(), write of K1 of data (3's) which
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* should take place at an offset of K3,
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* moving the file pointer to K4.
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*/
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nwrite = write(fildes, write_buf[3], K1);
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if (nwrite != K1) {
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tst_resm(TFAIL, "write() failed: nwrite=%d, errno=%d : "
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"%s", nwrite, errno, strerror(errno));
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continue;
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}
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/* We should be at offset K4. */
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l_seek(fildes, 0, SEEK_CUR, K4);
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/* Again, pwrite() K1 of data (1's) at offset K1. */
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nwrite = pwrite(fildes, write_buf[1], K1, K1);
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if (nwrite != K1) {
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tst_resm(TFAIL, "pwrite() failed to write at "
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"%d off. on %s, errno=%d : %s",
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K1, TEMPFILE, errno, strerror(errno));
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continue;
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}
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/*
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* Check the contents of temporary file
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* to which data written using pwrite().
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* Compare the data read with the original
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* write_buf[] contents.
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*/
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check_file_contents();
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/* reset to offset 0 in case we are looping */
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l_seek(fildes, 0, SEEK_SET, 0);
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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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*
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* Initialize/allocate read/write buffers.
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* Create a temporary directory and a file under it and
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*/
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void setup(void)
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{
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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/* Allocate/Initialize the write buffer with known data */
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init_buffers();
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tst_tmpdir();
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/* Creat a temporary file used for mapping */
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if ((fildes = 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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}
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/*
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* init_buffers() - allocate/Initialize write_buf array.
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*
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* Allocate 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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if (write_buf[count] == NULL) {
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tst_brkm(TBROK, NULL, "malloc() failed ");
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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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* l_seek() - local front end to lseek().
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*
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* "checkoff" is the offset at which we believe we should be at.
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* Used to validate pread/pwrite don't move the offset.
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*/
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void l_seek(int fdesc, off_t offset, int whence, off_t checkoff)
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{
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off_t offloc; /* offset ret. from lseek() */
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if ((offloc = lseek(fdesc, offset, whence)) != checkoff) {
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tst_resm(TWARN, "lseek returned %" PRId64 ", expected %" PRId64,
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(int64_t) offloc, (int64_t) checkoff);
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tst_brkm(TBROK | TERRNO, cleanup, "lseek() on %s Failed",
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TEMPFILE);
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}
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}
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/*
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* check_file_contents() - Check the contents of the file we wrote with
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* pwrite()'s.
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* The contents of the file are verified by using a plain read() and
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* Compare the data read with the original write_buf[] contents.
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*/
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void check_file_contents(void)
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{
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int count, err_flg = 0; /* index variable and error flag */
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int nread; /* return value of read() */
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off_t offloc; /* offset. ret. by lseek() */
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char *read_buf; /* buffer to hold read data */
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/* Allocate space for read buffer */
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read_buf = malloc(K1);
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if (read_buf == NULL) {
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tst_brkm(TBROK, cleanup, "malloc() failed on read buffer");
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}
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/* Seek to app. location of file and read the data, compare it */
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for (count = 0; count < NBUFS; count++) {
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/* Seek to specified offset position from beginning */
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offloc = lseek(fildes, count * K1, SEEK_SET);
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if (offloc != (count * K1)) {
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tst_brkm(TBROK | TERRNO, cleanup,
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"lseek() failed: offloc=%" PRId64,
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(int64_t) offloc);
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}
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/* Read the data from file into a buffer */
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nread = read(fildes, read_buf, K1);
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if (nread != K1) {
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tst_brkm(TBROK | TERRNO, cleanup,
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"read() failed: nread=%d", nread);
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}
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/* Compare the read data with the data written using pwrite */
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if (memcmp(write_buf[count], read_buf, K1) != 0) {
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tst_resm(TFAIL, "read/write buffer data mismatch");
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err_flg++;
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}
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}
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/* If no erros, Test successful */
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if (!err_flg) {
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tst_resm(TPASS, "Functionality of pwrite() successful");
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}
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/* Release the memory allocated before return */
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free(read_buf);
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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 write buffer.
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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 write buffer */
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for (count = 0; count < NBUFS; count++) {
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free(write_buf[count]);
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}
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/* Close the temporary file */
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SAFE_CLOSE(NULL, fildes);
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tst_rmdir();
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}
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