/* * 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" static void rndrm00(void) { int64_t repeat; int64_t size, this_size; pid_t pid; char dir_name[256]; /* Create a directory to test in */ pid = getpid(); tests_cat_pid(dir_name, "rndrm00_test_dir_", pid); if (chdir(dir_name) == -1) CHECK(mkdir(dir_name, 0777) != -1); CHECK(chdir(dir_name) != -1); /* Repeat loop */ repeat = tests_repeat_parameter; size = 0; for (;;) { /* Create and remove sub-dirs and small files, */ /* but tending to grow */ do { if (tests_random_no(3)) { this_size = tests_create_entry(NULL); if (!this_size) break; size += this_size; } else { this_size = tests_remove_entry(); size -= this_size; if (size < 0) size = 0; if (!this_size) this_size = 1; } } while (this_size && (tests_size_parameter == 0 || size < tests_size_parameter)); /* Create and remove sub-dirs and small files, but */ /* but tending to shrink */ do { if (!tests_random_no(3)) { this_size = tests_create_entry(NULL); size += this_size; } else { this_size = tests_remove_entry(); size -= this_size; if (size < 0) size = 0; } } while ((tests_size_parameter != 0 && size > tests_size_parameter / 10) || (tests_size_parameter == 0 && size > 100000)); /* Break if repeat count exceeded */ if (tests_repeat_parameter > 0 && --repeat <= 0) break; /* Sleep */ if (tests_sleep_parameter > 0) { unsigned us = tests_sleep_parameter * 1000; unsigned rand_divisor = RAND_MAX / us; unsigned s = (us / 2) + (rand() / rand_divisor); usleep(s); } } /* Tidy up by removing everything */ tests_clear_dir("."); CHECK(chdir("..") != -1); CHECK(rmdir(dir_name) != -1); } /* Title of this test */ static const char *rndrm00_get_title(void) { return "Randomly create and remove directories and files"; } /* Description of this test */ static const char *rndrm00_get_description(void) { return "Create a directory named rndrm00_test_dir_pid, where " \ "pid is the process id. Within that directory, " \ "randomly create and remove " \ "a number of sub-directories and small files, " \ "but do more creates than removes. " \ "When the total size of all sub-directories and files " \ "is greater than the size specified by the size parameter, " \ "start to do more removes than creates. " \ "The size parameter is given by the -z or --size option, " \ "otherwise it defaults to 1000000. " \ "A size of zero fills the file system until there is no " "space left. " \ "The task repeats, sleeping in between each iteration. " \ "The repeat count is set by the -n or --repeat option, " \ "otherwise it defaults to 1. " \ "A repeat count of zero repeats forever. " \ "The sleep value is given by the -p or --sleep option, " \ "otherwise it defaults to 0. " "Sleep is specified in milliseconds."; } int main(int argc, char *argv[]) { int run_test; /* Set default test size */ tests_size_parameter = 1000000; /* Set default test repetition */ tests_repeat_parameter = 1; /* Set default test sleep */ tests_sleep_parameter = 0; /* Handle common arguments */ run_test = tests_get_args(argc, argv, rndrm00_get_title(), rndrm00_get_description(), "znp"); if (!run_test) return 1; /* Change directory to the file system and check it is ok for testing */ tests_check_test_file_system(); /* Do the actual test */ rndrm00(); return 0; }