158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
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/*
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* Copyright (C) 2007 Nokia Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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* Author: Adrian Hunter
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include "tests.h"
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void rndrm00(void)
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{
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int64_t repeat;
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int64_t size, this_size;
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pid_t pid;
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char dir_name[256];
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/* Create a directory to test in */
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pid = getpid();
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tests_cat_pid(dir_name, "rndrm00_test_dir_", pid);
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if (chdir(dir_name) == -1)
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CHECK(mkdir(dir_name, 0777) != -1);
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CHECK(chdir(dir_name) != -1);
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/* Repeat loop */
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repeat = tests_repeat_parameter;
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size = 0;
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for (;;) {
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/* Create and remove sub-dirs and small files, */
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/* but tending to grow */
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do {
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if (tests_random_no(3)) {
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this_size = tests_create_entry(NULL);
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if (!this_size)
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break;
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size += this_size;
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} else {
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this_size = tests_remove_entry();
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size -= this_size;
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if (size < 0)
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size = 0;
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if (!this_size)
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this_size = 1;
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}
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} while (this_size &&
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(tests_size_parameter == 0 ||
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size < tests_size_parameter));
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/* Create and remove sub-dirs and small files, but */
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/* but tending to shrink */
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do {
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if (!tests_random_no(3)) {
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this_size = tests_create_entry(NULL);
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size += this_size;
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} else {
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this_size = tests_remove_entry();
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size -= this_size;
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if (size < 0)
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size = 0;
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}
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} while ((tests_size_parameter != 0 &&
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size > tests_size_parameter / 10) ||
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(tests_size_parameter == 0 && size > 100000));
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/* Break if repeat count exceeded */
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if (tests_repeat_parameter > 0 && --repeat <= 0)
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break;
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/* Sleep */
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if (tests_sleep_parameter > 0) {
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unsigned us = tests_sleep_parameter * 1000;
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unsigned rand_divisor = RAND_MAX / us;
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unsigned s = (us / 2) + (rand() / rand_divisor);
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usleep(s);
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}
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}
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/* Tidy up by removing everything */
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tests_clear_dir(".");
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CHECK(chdir("..") != -1);
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CHECK(rmdir(dir_name) != -1);
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}
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/* Title of this test */
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const char *rndrm00_get_title(void)
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{
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return "Randomly create and remove directories and files";
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}
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/* Description of this test */
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const char *rndrm00_get_description(void)
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{
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return
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"Create a directory named rndrm00_test_dir_pid, where " \
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"pid is the process id. Within that directory, " \
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"randomly create and remove " \
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"a number of sub-directories and small files, " \
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"but do more creates than removes. " \
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"When the total size of all sub-directories and files " \
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"is greater than the size specified by the size parameter, " \
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"start to do more removes than creates. " \
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"The size parameter is given by the -z or --size option, " \
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"otherwise it defaults to 1000000. " \
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"A size of zero fills the file system until there is no "
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"space left. " \
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"The task repeats, sleeping in between each iteration. " \
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"The repeat count is set by the -n or --repeat option, " \
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"otherwise it defaults to 1. " \
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"A repeat count of zero repeats forever. " \
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"The sleep value is given by the -p or --sleep option, " \
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"otherwise it defaults to 0. "
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"Sleep is specified in milliseconds.";
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}
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int main(int argc, char *argv[])
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{
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int run_test;
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/* Set default test size */
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tests_size_parameter = 1000000;
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/* Set default test repetition */
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tests_repeat_parameter = 1;
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/* Set default test sleep */
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tests_sleep_parameter = 0;
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/* Handle common arguments */
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run_test = tests_get_args(argc, argv, rndrm00_get_title(),
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rndrm00_get_description(), "znp");
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if (!run_test)
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return 1;
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/* Change directory to the file system and check it is ok for testing */
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tests_check_test_file_system();
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/* Do the actual test */
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rndrm00();
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return 0;
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}
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