73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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stdio/fdio.cpp
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Handles the file descriptor backend for the FILE* API.
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*******************************************************************************/
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#include <errno.h>
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#include <unistd.h>
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#include "fdio.h"
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int fdio_reopen(void* user, const char* mode)
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{
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(void) user;
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(void) mode;
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// TODO: Unfortunately, we don't support this yet. Note that we don't really
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// have to support this according to POSIX - but it'd be nicer to push this
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// restriction into the kernel and argue it's a security problem "What? No
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// you can't make this read-only descriptor writable!".
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return errno = ENOTSUP, -1;
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}
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ssize_t fdio_read(void* user, void* ptr, size_t size)
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{
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struct fdio_state* fdio = (struct fdio_state*) user;
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return read(fdio->fd, ptr, size);
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}
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ssize_t fdio_write(void* user, const void* ptr, size_t size)
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{
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struct fdio_state* fdio = (struct fdio_state*) user;
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return write(fdio->fd, ptr, size);
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}
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off_t fdio_seek(void* user, off_t offset, int whence)
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{
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struct fdio_state* fdio = (struct fdio_state*) user;
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return lseek(fdio->fd, offset, whence);
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}
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int fdio_fileno(void* user)
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{
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struct fdio_state* fdio = (struct fdio_state*) user;
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return fdio->fd;
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}
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int fdio_close(void* user)
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{
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struct fdio_state* fdio = (struct fdio_state*) user;
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int result = close(fdio->fd);
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if ( fdio->free_indirect )
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fdio->free_indirect(fdio);
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return result;
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}
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