// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: cmfsize - Common get file size function * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acapps.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 = ftell(file); if (current_offset < 0) { goto offset_error; } status = fseek(file, 0, SEEK_END); if (ACPI_FAILURE(status)) { goto seek_error; } file_size = ftell(file); if (file_size < 0) { goto offset_error; } /* Restore original file pointer */ status = fseek(file, current_offset, SEEK_SET); if (ACPI_FAILURE(status)) { goto seek_error; } return ((u32)file_size); offset_error: fprintf(stderr, "Could not get file offset\n"); return (ACPI_UINT32_MAX); seek_error: fprintf(stderr, "Could not set file offset\n"); return (ACPI_UINT32_MAX); }