1 /*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <fcntl.h> 32 #include <stdarg.h> 33 #include <sys/types.h> 34 #include <sys/syscall.h> 35 #include "libc_private.h" 36 37 #pragma weak fcntl 38 int 39 fcntl(int fd, int cmd, ...) 40 { 41 va_list args; 42 long arg; 43 44 va_start(args, cmd); 45 arg = va_arg(args, long); 46 va_end(args); 47 48 return (((int (*)(int, int, ...)) 49 __libc_interposing[INTERPOS_fcntl])(fd, cmd, arg)); 50 } 51 52 #ifdef SYSCALL_COMPAT 53 __weak_reference(__fcntl_compat, __fcntl); 54 55 int 56 __fcntl_compat(int fd, int cmd, ...) 57 { 58 va_list args; 59 long arg; 60 struct __oflock ofl; 61 struct flock *flp; 62 int res; 63 64 va_start(args, cmd); 65 arg = va_arg(args, long); 66 va_end(args); 67 68 if (__getosreldate() >= 800028) { 69 return (__sys_fcntl(fd, cmd, arg)); 70 } else { 71 if (cmd == F_GETLK || cmd == F_SETLK || cmd == F_SETLKW) { 72 /* 73 * Convert new-style struct flock (which 74 * includes l_sysid) to old-style. 75 */ 76 flp = (struct flock *) (uintptr_t) arg; 77 ofl.l_start = flp->l_start; 78 ofl.l_len = flp->l_len; 79 ofl.l_pid = flp->l_pid; 80 ofl.l_type = flp->l_type; 81 ofl.l_whence = flp->l_whence; 82 83 switch (cmd) { 84 case F_GETLK: 85 res = __sys_fcntl(fd, F_OGETLK, &ofl); 86 if (res >= 0) { 87 flp->l_start = ofl.l_start; 88 flp->l_len = ofl.l_len; 89 flp->l_pid = ofl.l_pid; 90 flp->l_type = ofl.l_type; 91 flp->l_whence = ofl.l_whence; 92 flp->l_sysid = 0; 93 } 94 return (res); 95 96 case F_SETLK: 97 return (__sys_fcntl(fd, F_OSETLK, &ofl)); 98 99 case F_SETLKW: 100 return (__sys_fcntl(fd, F_OSETLKW, &ofl)); 101 } 102 } 103 return (__sys_fcntl(fd, cmd, arg)); 104 } 105 } 106 #else 107 __weak_reference(__sys_fcntl, __fcntl_compat); 108 __weak_reference(__sys_fcntl, __fcntl); 109 #endif 110