/*
* Copyright (c) 2004 Daniel McNeil <daniel@osdl.org>
* 2004 Open Source Development Lab
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Module: .c
*/
/*
* Change History:
*
* 2/2004 Marty Ridgeway (mridge@us.ibm.com) Changes to adapt to LTP
*
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "common_checkzero.h"
int read_eof(char *filename)
{
int fd;
int i;
int r;
char buf[4096];
if ((fd = open(filename, O_RDWR)) < 0) {
fprintf(stderr, "can't open file %s \n", filename);
exit(1);
}
for (i = 0; i < 100000; i++) {
off_t offset;
char *bufoff;
offset = lseek(fd, 4096, SEEK_END);
r = write(fd, "A", 1);
offset = lseek(fd, offset - 4096, SEEK_SET);
r = read(fd, buf, 4096);
if (r > 0) {
if ((bufoff = check_zero(buf, r))) {
fprintf(stderr, "non-zero read at offset %p\n",
offset + bufoff);
exit(1);
}
}
}
fprintf(stderr, "read_checkzero done\n");
return 0;
}
int main(int argc, char **argv)
{
if (argc < 2) {
printf("You must pass a filename to the test \n");
exit(1);
}
char *filename = argv[1];
read_eof(filename);
return 0;
}