diff options
Diffstat (limited to 'helpers_fileio.c')
-rw-r--r-- | helpers_fileio.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/helpers_fileio.c b/helpers_fileio.c new file mode 100644 index 000000000..cb7675db2 --- /dev/null +++ b/helpers_fileio.c @@ -0,0 +1,132 @@ +/* + * 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 +} |