1 /* $OpenBSD: w_fcntl.c,v 1.1 2016/05/07 19:05:22 guenther Exp $ */ 2 /* 3 * Copyright (c) 2015 Philip Guenther <guenther@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <fcntl.h> 19 #include <stdarg.h> 20 #include "cancel.h" 21 22 int 23 fcntl(int fd, int cmd, ...) 24 { 25 va_list ap; 26 int ret; 27 28 va_start(ap, cmd); 29 switch (cmd) { 30 case F_DUPFD: 31 case F_DUPFD_CLOEXEC: 32 case F_SETFD: 33 case F_SETFL: 34 case F_SETOWN: 35 ret = HIDDEN(fcntl)(fd, cmd, va_arg(ap, int)); 36 break; 37 case F_GETFD: 38 case F_GETFL: 39 case F_GETOWN: 40 case F_ISATTY: 41 ret = HIDDEN(fcntl)(fd, cmd); 42 break; 43 case F_GETLK: 44 case F_SETLK: 45 ret = HIDDEN(fcntl)(fd, cmd, va_arg(ap, struct flock *)); 46 break; 47 case F_SETLKW: 48 ENTER_CANCEL_POINT(1); 49 ret = HIDDEN(fcntl)(fd, cmd, va_arg(ap, struct flock *)); 50 LEAVE_CANCEL_POINT(ret == -1); 51 break; 52 default: /* should never happen? */ 53 ret = HIDDEN(fcntl)(fd, cmd, va_arg(ap, void *)); 54 break; 55 } 56 va_end(ap); 57 return (ret); 58 } 59 DEF_CANCEL(fcntl); 60