mirror of
https://review.coreboot.org/flashrom.git
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c9ebfad95f
Constructing a written file from a buffer is auxiliary functionality to the core flashrom algorithms. Move aside to decrease the overall complexity of flashrom.c BUG=b:242246291 TEST=builds Change-Id: Ib613e74597d4bdd689043ba93aeb6a87ec80cc14 Signed-off-by: Edward O'Callaghan <quasisec@google.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/66646 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Evan Benn <evanbenn@google.com> Reviewed-by: Sam McNally <sammc@google.com> Reviewed-by: Thomas Heijligen <src@posteo.de>
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2009-2010 Carl-Daniel Hailfinger
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* Copyright (C) 2013 Stefan Tauner
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#ifndef __LIBPAYLOAD__
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#include <fcntl.h>
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#include <sys/stat.h>
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#endif
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#include "flash.h"
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int read_buf_from_file(unsigned char *buf, unsigned long size,
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const char *filename)
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{
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#ifdef __LIBPAYLOAD__
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msg_gerr("Error: No file I/O support in libpayload\n");
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return 1;
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#else
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int ret = 0;
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FILE *image;
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if (!strcmp(filename, "-"))
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image = fdopen(fileno(stdin), "rb");
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else
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image = fopen(filename, "rb");
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if (image == NULL) {
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msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
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return 1;
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}
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struct stat image_stat;
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if (fstat(fileno(image), &image_stat) != 0) {
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msg_gerr("Error: getting metadata of file \"%s\" failed: %s\n", filename, strerror(errno));
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ret = 1;
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goto out;
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}
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if ((image_stat.st_size != (intmax_t)size) && strcmp(filename, "-")) {
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msg_gerr("Error: Image size (%jd B) doesn't match the expected size (%lu B)!\n",
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(intmax_t)image_stat.st_size, size);
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ret = 1;
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goto out;
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}
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unsigned long numbytes = fread(buf, 1, size, image);
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if (numbytes != size) {
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msg_gerr("Error: Failed to read complete file. Got %ld bytes, "
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"wanted %ld!\n", numbytes, size);
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ret = 1;
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}
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out:
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(void)fclose(image);
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return ret;
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#endif
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}
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/**
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* @brief Writes passed data buffer into a file
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*
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* @param buf Buffer with data to write
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* @param size Size of buffer
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* @param filename File path to write to
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* @return 0 on success
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*/
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int write_buf_to_file(const unsigned char *buf, unsigned long size, const char *filename)
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{
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#ifdef __LIBPAYLOAD__
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msg_gerr("Error: No file I/O support in libpayload\n");
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return 1;
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#else
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FILE *image;
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int ret = 0;
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if (!filename) {
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msg_gerr("No filename specified.\n");
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return 1;
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}
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if ((image = fopen(filename, "wb")) == NULL) {
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msg_gerr("Error: opening file \"%s\" failed: %s\n", filename, strerror(errno));
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return 1;
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}
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unsigned long numbytes = fwrite(buf, 1, size, image);
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if (numbytes != size) {
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msg_gerr("Error: file %s could not be written completely.\n", filename);
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ret = 1;
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goto out;
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}
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if (fflush(image)) {
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msg_gerr("Error: flushing file \"%s\" failed: %s\n", filename, strerror(errno));
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ret = 1;
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}
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// Try to fsync() only regular files and if that function is available at all (e.g. not on MinGW).
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#if defined(_POSIX_FSYNC) && (_POSIX_FSYNC != -1)
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struct stat image_stat;
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if (fstat(fileno(image), &image_stat) != 0) {
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msg_gerr("Error: getting metadata of file \"%s\" failed: %s\n", filename, strerror(errno));
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ret = 1;
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goto out;
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}
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if (S_ISREG(image_stat.st_mode)) {
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if (fsync(fileno(image))) {
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msg_gerr("Error: fsyncing file \"%s\" failed: %s\n", filename, strerror(errno));
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ret = 1;
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}
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}
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#endif
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out:
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if (fclose(image)) {
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msg_gerr("Error: closing file \"%s\" failed: %s\n", filename, strerror(errno));
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ret = 1;
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}
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return ret;
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#endif
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}
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