/****************************************************************************** * * Module Name: cfsize - Common get file size function * *****************************************************************************/ /* * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include "accommon.h" #include "acapps.h" #include <stdio.h> #define _COMPONENT ACPI_TOOLS ACPI_MODULE_NAME("cmfsize") /******************************************************************************* * * FUNCTION: cm_get_file_size * * PARAMETERS: file - Open file descriptor * * RETURN: File Size. On error, -1 (ACPI_UINT32_MAX) * * DESCRIPTION: Get the size of a file. Uses seek-to-EOF. File must be open. * Does not disturb the current file pointer. * ******************************************************************************/ u32 cm_get_file_size(ACPI_FILE file) { long file_size; long current_offset; acpi_status status; /* Save the current file pointer, seek to EOF to obtain file size */ current_offset = acpi_os_get_file_offset(file); if (current_offset < 0) { goto offset_error; } status = acpi_os_set_file_offset(file, 0, ACPI_FILE_END); if (ACPI_FAILURE(status)) { goto seek_error; } file_size = acpi_os_get_file_offset(file); if (file_size < 0) { goto offset_error; } /* Restore original file pointer */ status = acpi_os_set_file_offset(file, current_offset, ACPI_FILE_BEGIN); if (ACPI_FAILURE(status)) { goto seek_error; } return ((u32)file_size); offset_error: acpi_log_error("Could not get file offset"); return (ACPI_UINT32_MAX); seek_error: acpi_log_error("Could not set file offset"); return (ACPI_UINT32_MAX); }