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49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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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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fcntl/fcntl.cpp
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Manipulates a file descriptor.
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*******************************************************************************/
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#include <sys/syscall.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdint.h>
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DEFN_SYSCALL3(int, sys_fcntl, SYSCALL_FCNTL, int, int, uintptr_t);
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extern "C" int fcntl(int fd, int cmd, ...)
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{
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uintptr_t arg;
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va_list ap;
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va_start(ap, cmd);
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switch ( F_DECODE_CMD_TYPE(cmd) )
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{
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case F_TYPE_VOID: arg = 0; break;
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case F_TYPE_INT: arg = (uintptr_t) va_arg(ap, int); break;
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case F_TYPE_LONG: arg = (uintptr_t) va_arg(ap, long); break;
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case F_TYPE_PTR: arg = (uintptr_t) va_arg(ap, void*); break;
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default: return errno = EINVAL, -1;
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}
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va_end(ap);
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return sys_fcntl(fd, cmd, arg);
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}
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