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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2009-2010 Carl-Daniel Hailfinger
* Copyright (C) 2013 Stefan Tauner
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifndef __LIBPAYLOAD__
#include <fcntl.h>
#include <sys/stat.h>
#endif
#include "flash.h"
int read_buf_from_file(unsigned char *buf, unsigned long size,
const char *filename)
{
#ifdef __LIBPAYLOAD__
msg_gerr("Error: No file I/O support in libpayload\n");
return 1;
#else
int ret = 0;
FILE *image;
if (!strcmp(filename, "-"))
image = fdopen(fileno(stdin), "rb");
else
image = fopen(filename, "rb");
if (image == NULL) {
msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
return 1;
}
struct stat image_stat;
if (fstat(fileno(image), &image_stat) != 0) {
msg_gerr("Error: getting metadata of file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
goto out;
}
if ((image_stat.st_size != (intmax_t)size) && strcmp(filename, "-")) {
msg_gerr("Error: Image size (%jd B) doesn't match the expected size (%lu B)!\n",
(intmax_t)image_stat.st_size, size);
ret = 1;
goto out;
}
unsigned long numbytes = fread(buf, 1, size, image);
if (numbytes != size) {
msg_gerr("Error: Failed to read complete file. Got %ld bytes, "
"wanted %ld!\n", numbytes, size);
ret = 1;
}
out:
(void)fclose(image);
return ret;
#endif
}
/**
* @brief Writes passed data buffer into a file
*
* @param buf Buffer with data to write
* @param size Size of buffer
* @param filename File path to write to
* @return 0 on success
*/
int write_buf_to_file(const unsigned char *buf, unsigned long size, const char *filename)
{
#ifdef __LIBPAYLOAD__
msg_gerr("Error: No file I/O support in libpayload\n");
return 1;
#else
FILE *image;
int ret = 0;
if (!filename) {
msg_gerr("No filename specified.\n");
return 1;
}
if ((image = fopen(filename, "wb")) == NULL) {
msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
return 1;
}
unsigned long numbytes = fwrite(buf, 1, size, image);
if (numbytes != size) {
msg_gerr("Error: file %s could not be written completely.\n", filename);
ret = 1;
goto out;
}
if (fflush(image)) {
msg_gerr("Error: flushing file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
}
// Try to fsync() only regular files and if that function is available at all (e.g. not on MinGW).
#if defined(_POSIX_FSYNC) && (_POSIX_FSYNC != -1)
struct stat image_stat;
if (fstat(fileno(image), &image_stat) != 0) {
msg_gerr("Error: getting metadata of file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
goto out;
}
if (S_ISREG(image_stat.st_mode)) {
if (fsync(fileno(image))) {
msg_gerr("Error: fsyncing file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
}
}
#endif
out:
if (fclose(image)) {
msg_gerr("Error: closing file \"%s\" failed: %s\n", filename, strerror(errno));
ret = 1;
}
return ret;
#endif
}
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