112 lines
2.6 KiB
C
112 lines
2.6 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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#define WRITE_BUFFER_SIZE 32768
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void ftrunc(void)
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{
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int fd, i;
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pid_t pid;
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ssize_t written;
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int64_t remains;
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size_t block;
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char *file_name;
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off_t actual;
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char buf[WRITE_BUFFER_SIZE];
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file_name = "ftrunc_test_file";
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fd = open(file_name, O_CREAT | O_WRONLY,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
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CHECK(fd != -1);
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pid = getpid();
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srand(pid);
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for (i = 0; i < WRITE_BUFFER_SIZE;++i)
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buf[i] = rand();
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remains = tests_size_parameter;
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actual = 0;
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while (remains > 0) {
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if (remains > WRITE_BUFFER_SIZE)
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block = WRITE_BUFFER_SIZE;
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else
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block = remains;
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written = write(fd, buf, block);
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if (written <= 0) {
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CHECK(errno == ENOSPC); /* File system full */
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errno = 0;
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break;
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}
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remains -= written;
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actual += written;
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}
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CHECK(ftruncate(fd, (actual ? actual - 1 : actual)) != -1);
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CHECK(close(fd) != -1);
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CHECK(unlink(file_name) != -1);
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}
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/* Title of this test */
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const char *ftrunc_get_title(void)
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{
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return "Truncate a large test file";
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}
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/* Description of this test */
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const char *ftrunc_get_description(void)
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{
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return
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"Create a file named ftrunc_test_file. " \
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"Truncate the file to reduce its length by 1. " \
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"Then remove the truncated file. "
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"The size is given by the -z or --size option, " \
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"otherwise it defaults to 1000000.";
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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 file size */
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tests_size_parameter = 1000000;
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/* Handle common arguments */
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run_test = tests_get_args(argc, argv, ftrunc_get_title(),
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ftrunc_get_description(), "z");
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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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ftrunc();
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return 0;
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}
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