45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/*
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* Copyright (c) 2011, 2012 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* fcntl/fcntl.c
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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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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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