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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: apfiles - File-related functions for acpidump utility
*
* Copyright (C) 2000 - 2022, Intel Corp.
*
*****************************************************************************/
#include "acpidump.h"
/* Local prototypes */
static int ap_is_existing_file(char *pathname);
/******************************************************************************
*
* FUNCTION: ap_is_existing_file
*
* PARAMETERS: pathname - Output filename
*
* RETURN: 0 on success
*
* DESCRIPTION: Query for file overwrite if it already exists.
*
******************************************************************************/
static int ap_is_existing_file(char *pathname)
{
#if !defined(_GNU_EFI) && !defined(_EDK2_EFI)
struct stat stat_info;
int in_char;
if (!stat(pathname, &stat_info)) {
fprintf(stderr,
"Target path already exists, overwrite? [y|n] ");
in_char = fgetc(stdin);
if (in_char == '\n') {
in_char = fgetc(stdin);
}
if (in_char != 'y' && in_char != '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 = fopen(pathname, "w");
if (!file) {
fprintf(stderr, "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_NAMESEG_SIZE + 16];
char instance_str[16];
ACPI_FILE file;
acpi_size 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_COPY_NAMESEG(filename, ACPI_RSDP_NAME);
} else {
ACPI_COPY_NAMESEG(filename, table->signature);
}
filename[0] = (char)tolower((int)filename[0]);
filename[1] = (char)tolower((int)filename[1]);
filename[2] = (char)tolower((int)filename[2]);
filename[3] = (char)tolower((int)filename[3]);
filename[ACPI_NAMESEG_SIZE] = 0;
/* Handle multiple SSDts - create different filenames for each */
if (instance > 0) {
snprintf(instance_str, sizeof(instance_str), "%u", instance);
strcat(filename, instance_str);
}
strcat(filename, FILE_SUFFIX_BINARY_TABLE);
if (gbl_verbose_mode) {
fprintf(stderr,
"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 = fopen(filename, "wb");
if (!file) {
fprintf(stderr, "Could not open output file: %s\n", filename);
return (-1);
}
actual = fwrite(table, 1, table_length, file);
if (actual != table_length) {
fprintf(stderr, "Error writing binary output file: %s\n",
filename);
fclose(file);
return (-1);
}
fclose(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;
acpi_size actual;
/* Must use binary mode */
file = fopen(pathname, "rb");
if (!file) {
fprintf(stderr, "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) {
fprintf(stderr,
"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) {
fprintf(stderr,
"Could not allocate file buffer of size: %u\n",
file_size);
goto cleanup;
}
/* Read the entire file */
actual = fread(buffer, 1, file_size, file);
if (actual != file_size) {
fprintf(stderr, "Could not read input file: %s\n", pathname);
ACPI_FREE(buffer);
buffer = NULL;
goto cleanup;
}
*out_file_size = file_size;
cleanup:
fclose(file);
return (buffer);
}
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