0b3efa90c9
This patch makes various utilities that were originally developed for the backdrop application publicly available.
56 lines
995 B
C++
56 lines
995 B
C++
/*
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* \brief Utility for loading a file
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* \author Norman Feske
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* \date 2014-08-14
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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/* gems includes */
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#include <gems/file.h>
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/* libc includes */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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static Genode::size_t file_size(char const *name)
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{
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struct stat s;
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s.st_size = 0;
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stat(name, &s);
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return s.st_size;
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}
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File::File(char const *name, Genode::Allocator &alloc)
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:
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_alloc(alloc),
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_file_size(file_size(name)),
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_data(alloc.alloc(_file_size))
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{
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int const fd = open(name, O_RDONLY);
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if (read(fd, _data, _file_size) < 0) {
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PERR("reading from file \"%s\" failed (error %d)", name, errno);
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throw Reading_failed();
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}
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close(fd);
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}
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File::~File()
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{
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_alloc.free(_data, _file_size);
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}
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