175 lines
4.2 KiB
C
175 lines
4.2 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* NAME
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* read01.c
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*
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* DESCRIPTION
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* Testcase to check if read returns the number of bytes read correctly.
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*
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* ALGORITHM
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* Create a file and write some bytes out to it.
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* Attempt to read more than written.
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* Check the return count, and the read buffer. The read buffer should be
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* same as the write buffer.
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*
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* USAGE: <for command-line>
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* read01 [-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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#include <fcntl.h>
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#include <errno.h>
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#include "test.h"
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#include "usctest.h"
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void cleanup(void) __attribute__((noreturn));
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void setup(void);
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const char *TCID = "read01";
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int TST_TOTAL = 1;
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extern int Tst_count;
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#define TST_SIZE 26 /* could also do strlen(palfa) */
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char fname[255];
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char palfa[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ;
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int fild;
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int
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main(int ac, char **av)
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{
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int lc; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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int rfild;
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char prbuf[BUFSIZ];
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/*
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* parse standard options
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*/
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if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
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tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
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/*NOTREACHED*/
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}
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setup(); /* global setup for test */
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/* check looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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Tst_count = 0; /* reset Tst_count while looping */
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if ((rfild = open(fname, O_RDONLY)) == -1) {
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tst_brkm(TBROK, cleanup, "can't open for reading");
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/*NOTREACHED*/
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}
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TEST(read(rfild, prbuf, BUFSIZ));
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if (TEST_RETURN == -1) {
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tst_resm(TFAIL, "call failed unexpectedly");
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continue;
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}
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if (STD_FUNCTIONAL_TEST) {
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if (TEST_RETURN != TST_SIZE) {
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tst_resm(TFAIL, "Bad read count - got %d - "
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"expected %d", TEST_RETURN, TST_SIZE);
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continue;
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}
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if (memcmp(palfa, prbuf, TST_SIZE) != 0) {
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tst_resm(TFAIL, "read buffer not equal "
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"to write buffer");
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continue;
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}
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tst_resm(TPASS, "functionality of read() is correct");
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} else {
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tst_resm(TPASS, "call succeeded");
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}
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if (close(rfild) == -1) {
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tst_brkm(TBROK, cleanup, "close() failed");
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/*NOTREACHED*/
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}
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}
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cleanup();
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/*NOTREACHED*/
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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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void
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setup(void)
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{
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/* capture signals */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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umask(0);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/* make a temp directory and cd to it */
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tst_tmpdir();
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sprintf(fname,"tfile_%d",getpid());
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if ((fild = creat(fname, 0777)) == -1) {
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tst_brkm(TBROK, cleanup, "creat(%s, 0777) Failed, errno = %d"
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" : %s", fname, errno, strerror(errno));
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/*NOTREACHED*/
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}
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if (write(fild, palfa, TST_SIZE) != TST_SIZE) {
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tst_brkm(TBROK, cleanup, "can't write to Xread");
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/*NOTREACHED*/
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}
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close (fild);
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}
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/*
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* cleanup() - performs all ONE TIME cleanup for this test at completion or
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* premature exit.
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*/
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void
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cleanup(void)
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{
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* Remove tmp dir and all files in it */
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unlink(fname);
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tst_rmdir();
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/* exit with return code appropriate for results */
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tst_exit();
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}
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