blob: 8f2fe168228eb12d9e97efa085d9d5d5d41d94f3 [file] [log] [blame]
/******************************************************************************
*
* Module Name: apfiles - File-related functions for acpidump utility
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2015, 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 "acpidump.h"
#include "acapps.h"
/* Local prototypes */
static int ap_is_existing_file(char *pathname);
static int ap_is_existing_file(char *pathname)
{
#ifndef _GNU_EFI
struct stat stat_info;
if (!stat(pathname, &stat_info)) {
acpi_log_error("Target path already exists, overwrite? [y|n] ");
if (getchar() != 'y') {
return (-1);
}
}
#endif
return 0;
}
/******************************************************************************
*
* FUNCTION: ap_open_output_file
*
* PARAMETERS: pathname - Output filename
*
* RETURN: Open file handle
*
* DESCRIPTION: Open a text output file for acpidump. Checks if file already
* exists.
*
******************************************************************************/
int ap_open_output_file(char *pathname)
{
ACPI_FILE file;
/* If file exists, prompt for overwrite */
if (ap_is_existing_file(pathname) != 0) {
return (-1);
}
/* Point stdout to the file */
file = acpi_os_open_file(pathname, ACPI_FILE_WRITING);
if (!file) {
acpi_log_error("Could not open output file: %s\n", pathname);
return (-1);
}
/* Save the file and path */
gbl_output_file = file;
gbl_output_filename = pathname;
return (0);
}
/******************************************************************************
*
* FUNCTION: ap_write_to_binary_file
*
* PARAMETERS: table - ACPI table to be written
* instance - ACPI table instance no. to be written
*
* RETURN: Status
*
* DESCRIPTION: Write an ACPI table to a binary file. Builds the output
* filename from the table signature.
*
******************************************************************************/
int ap_write_to_binary_file(struct acpi_table_header *table, u32 instance)
{
char filename[ACPI_NAME_SIZE + 16];
char instance_str[16];
ACPI_FILE file;
size_t actual;
u32 table_length;
/* Obtain table length */
table_length = ap_get_table_length(table);
/* Construct lower-case filename from the table local signature */
if (ACPI_VALIDATE_RSDP_SIG(table->signature)) {
ACPI_MOVE_NAME(filename, ACPI_RSDP_NAME);
} else {
ACPI_MOVE_NAME(filename, table->signature);
}
filename[0] = (char)ACPI_TOLOWER(filename[0]);
filename[1] = (char)ACPI_TOLOWER(filename[1]);
filename[2] = (char)ACPI_TOLOWER(filename[2]);
filename[3] = (char)ACPI_TOLOWER(filename[3]);
filename[ACPI_NAME_SIZE] = 0;
/* Handle multiple SSDts - create different filenames for each */
if (instance > 0) {
acpi_ut_snprintf(instance_str, sizeof(instance_str), "%u",
instance);
ACPI_STRCAT(filename, instance_str);
}
ACPI_STRCAT(filename, ACPI_TABLE_FILE_SUFFIX);
if (gbl_verbose_mode) {
acpi_log_error
("Writing [%4.4s] to binary file: %s 0x%X (%u) bytes\n",
table->signature, filename, table->length, table->length);
}
/* Open the file and dump the entire table in binary mode */
file = acpi_os_open_file(filename,
ACPI_FILE_WRITING | ACPI_FILE_BINARY);
if (!file) {
acpi_log_error("Could not open output file: %s\n", filename);
return (-1);
}
actual = acpi_os_write_file(file, table, 1, table_length);
if (actual != table_length) {
acpi_log_error("Error writing binary output file: %s\n",
filename);
acpi_os_close_file(file);
return (-1);
}
acpi_os_close_file(file);
return (0);
}
/******************************************************************************
*
* FUNCTION: ap_get_table_from_file
*
* PARAMETERS: pathname - File containing the binary ACPI table
* out_file_size - Where the file size is returned
*
* RETURN: Buffer containing the ACPI table. NULL on error.
*
* DESCRIPTION: Open a file and read it entirely into a new buffer
*
******************************************************************************/
struct acpi_table_header *ap_get_table_from_file(char *pathname,
u32 *out_file_size)
{
struct acpi_table_header *buffer = NULL;
ACPI_FILE file;
u32 file_size;
size_t actual;
/* Must use binary mode */
file =
acpi_os_open_file(pathname, ACPI_FILE_READING | ACPI_FILE_BINARY);
if (!file) {
acpi_log_error("Could not open input file: %s\n", pathname);
return (NULL);
}
/* Need file size to allocate a buffer */
file_size = cm_get_file_size(file);
if (file_size == ACPI_UINT32_MAX) {
acpi_log_error("Could not get input file size: %s\n", pathname);
goto cleanup;
}
/* Allocate a buffer for the entire file */
buffer = ACPI_ALLOCATE_ZEROED(file_size);
if (!buffer) {
acpi_log_error("Could not allocate file buffer of size: %u\n",
file_size);
goto cleanup;
}
/* Read the entire file */
actual = acpi_os_read_file(file, buffer, 1, file_size);
if (actual != file_size) {
acpi_log_error("Could not read input file: %s\n", pathname);
ACPI_FREE(buffer);
buffer = NULL;
goto cleanup;
}
*out_file_size = file_size;
cleanup:
acpi_os_close_file(file);
return (buffer);
}