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/*
* Copyright (C) 2007 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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 St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Author: Adrian Hunter
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include "tests.h"
#define WRITE_BUFFER_SIZE 32768
void adjust_size(void)
{
char dummy[1024];
unsigned long total_memory;
FILE *f;
total_memory = 0;
f = fopen("/proc/meminfo", "r");
fscanf(f, "%s %lu", dummy, &total_memory);
fclose(f);
if (total_memory > 0 && tests_size_parameter > total_memory / 2)
tests_size_parameter = total_memory / 2;
}
void run_pdf(void)
{
int fd, i;
pid_t pid;
int64_t repeat;
ssize_t written;
int64_t remains;
size_t block;
char file_name[256];
char buf[WRITE_BUFFER_SIZE];
if (tests_fs_is_currfs())
return;
adjust_size();
pid = getpid();
tests_cat_pid(file_name, "run_pdf_test_file_", pid);
fd = open(file_name, O_CREAT | O_WRONLY,
S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
CHECK(fd != -1);
pid = getpid();
srand(pid);
repeat = tests_repeat_parameter;
for (;;) {
for (i = 0; i < WRITE_BUFFER_SIZE;++i)
buf[i] = rand();
remains = tests_size_parameter;
while (remains > 0) {
if (remains > WRITE_BUFFER_SIZE)
block = WRITE_BUFFER_SIZE;
else
block = remains;
written = write(fd, buf, block);
if (written <= 0) {
CHECK(errno == ENOSPC); /* File system full */
errno = 0;
break;
}
remains -= written;
}
/* Break if repeat count exceeded */
if (tests_repeat_parameter > 0 && --repeat <= 0)
break;
CHECK(lseek(fd, 0, SEEK_SET) == 0);
}
CHECK(close(fd) != -1);
CHECK(unlink(file_name) != -1);
}
/* Title of this test */
const char *run_pdf_get_title(void)
{
return "Create / overwrite a large file in the current directory";
}
/* Description of this test */
const char *run_pdf_get_description(void)
{
return
"Create a file named run_pdf_test_file_pid, " \
"where pid is the process id. The file is created " \
"in the current directory, " \
"if the current directory is NOT on the test " \
"file system, otherwise no action is taken. " \
"If a repeat count is specified, then the task repeats " \
"that number of times. " \
"The repeat count is given by the -n or --repeat option, " \
"otherwise it defaults to 1. " \
"A repeat count of zero repeats forever. " \
"The size is given by the -z or --size option, " \
"otherwise it defaults to 1000000. " \
"The size is adjusted so that it is not more than " \
"half the size of total memory.";
}
int main(int argc, char *argv[])
{
int run_test;
/* Set default test file size */
tests_size_parameter = 1000000;
/* Set default test repetition */
tests_repeat_parameter = 1;
/* Handle common arguments */
run_test = tests_get_args(argc, argv, run_pdf_get_title(),
run_pdf_get_description(), "zn");
if (!run_test)
return 1;
/* Do the actual test */
run_pdf();
return 0;
}
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