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sortix--sortix/libc/fcntl/fcntl.cpp
Jonas 'Sortie' Termansen 8c0e0235d6 Refactor fcntl(2) ABI.
This is an incompatible ABI change.
2013-12-17 14:30:43 +01:00

49 lines
1.6 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
fcntl/fcntl.cpp
Manipulates a file descriptor.
*******************************************************************************/
#include <sys/syscall.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdint.h>
DEFN_SYSCALL3(int, sys_fcntl, SYSCALL_FCNTL, int, int, uintptr_t);
extern "C" int fcntl(int fd, int cmd, ...)
{
uintptr_t arg;
va_list ap;
va_start(ap, cmd);
switch ( F_DECODE_CMD_TYPE(cmd) )
{
case F_TYPE_VOID: arg = 0; break;
case F_TYPE_INT: arg = (uintptr_t) va_arg(ap, int); break;
case F_TYPE_LONG: arg = (uintptr_t) va_arg(ap, long); break;
case F_TYPE_PTR: arg = (uintptr_t) va_arg(ap, void*); break;
default: return errno = EINVAL, -1;
}
va_end(ap);
return sys_fcntl(fd, cmd, arg);
}