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/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* NAME
* read01.c
*
* DESCRIPTION
* Testcase to check if read returns the number of bytes read correctly.
*
* ALGORITHM
* Create a file and write some bytes out to it.
* Attempt to read more than written.
* Check the return count, and the read buffer. The read buffer should be
* same as the write buffer.
*
* USAGE: <for command-line>
* read01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -f : Turn off functionality Testing.
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* HISTORY
* 07/2001 Ported by Wayne Boyer
*
* RESTRICTIONS
* None
*/
#include <fcntl.h>
#include <errno.h>
#include "test.h"
#include "usctest.h"
void cleanup(void) __attribute__((noreturn));
void setup(void);
const char *TCID = "read01";
int TST_TOTAL = 1;
extern int Tst_count;
#define TST_SIZE 26 /* could also do strlen(palfa) */
char fname[255];
char palfa[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ;
int fild;
int
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
int rfild;
char prbuf[BUFSIZ];
/*
* parse standard options
*/
if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
/*NOTREACHED*/
}
setup(); /* global setup for test */
/* check looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
Tst_count = 0; /* reset Tst_count while looping */
if ((rfild = open(fname, O_RDONLY)) == -1) {
tst_brkm(TBROK, cleanup, "can't open for reading");
/*NOTREACHED*/
}
TEST(read(rfild, prbuf, BUFSIZ));
if (TEST_RETURN == -1) {
tst_resm(TFAIL, "call failed unexpectedly");
continue;
}
if (STD_FUNCTIONAL_TEST) {
if (TEST_RETURN != TST_SIZE) {
tst_resm(TFAIL, "Bad read count - got %d - "
"expected %d", TEST_RETURN, TST_SIZE);
continue;
}
if (memcmp(palfa, prbuf, TST_SIZE) != 0) {
tst_resm(TFAIL, "read buffer not equal "
"to write buffer");
continue;
}
tst_resm(TPASS, "functionality of read() is correct");
} else {
tst_resm(TPASS, "call succeeded");
}
if (close(rfild) == -1) {
tst_brkm(TBROK, cleanup, "close() failed");
/*NOTREACHED*/
}
}
cleanup();
/*NOTREACHED*/
}
/*
* setup() - performs all ONE TIME setup for this test
*/
void
setup(void)
{
/* capture signals */
tst_sig(NOFORK, DEF_HANDLER, cleanup);
umask(0);
/* Pause if that option was specified */
TEST_PAUSE;
/* make a temp directory and cd to it */
tst_tmpdir();
sprintf(fname,"tfile_%d",getpid());
if ((fild = creat(fname, 0777)) == -1) {
tst_brkm(TBROK, cleanup, "creat(%s, 0777) Failed, errno = %d"
" : %s", fname, errno, strerror(errno));
/*NOTREACHED*/
}
if (write(fild, palfa, TST_SIZE) != TST_SIZE) {
tst_brkm(TBROK, cleanup, "can't write to Xread");
/*NOTREACHED*/
}
close (fild);
}
/*
* cleanup() - performs all ONE TIME cleanup for this test at completion or
* premature exit.
*/
void
cleanup(void)
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* Remove tmp dir and all files in it */
unlink(fname);
tst_rmdir();
/* exit with return code appropriate for results */
tst_exit();
}
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