1 /* 2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk (at) cs.few.eur.nl> 3 * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl> 4 * Copyright (c) 1993-1996 Rick Sladkey <jrs (at) world.std.com> 5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert (at) cistron.nl> 6 * Copyright (c) 2005 Roland McGrath <roland (at) redhat.com> 7 * Copyright (c) 2007-2015 Dmitry V. Levin <ldv (at) altlinux.org> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include "defs.h" 34 35 #define MS_MGC_VAL 0xc0ed0000 /* old magic mount flag number */ 36 #define MS_MGC_MSK 0xffff0000 /* old magic mount flag mask */ 37 38 #include "xlat/mount_flags.h" 39 40 SYS_FUNC(mount) 41 { 42 bool ignore_type = false; 43 bool ignore_data = false; 44 bool old_magic = false; 45 unsigned long flags = tcp->u_arg[3]; 46 47 /* Discard magic */ 48 if ((flags & MS_MGC_MSK) == MS_MGC_VAL) { 49 flags &= ~MS_MGC_MSK; 50 old_magic = true; 51 } 52 53 if (flags & MS_REMOUNT) 54 ignore_type = true; 55 else if (flags & (MS_BIND | MS_MOVE | MS_SHARED 56 | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE)) 57 ignore_type = ignore_data = true; 58 59 printpath(tcp, tcp->u_arg[0]); 60 tprints(", "); 61 62 printpath(tcp, tcp->u_arg[1]); 63 tprints(", "); 64 65 if (ignore_type) 66 printaddr(tcp->u_arg[2]); 67 else 68 printstr(tcp, tcp->u_arg[2], -1); 69 tprints(", "); 70 71 if (old_magic) { 72 tprints("MS_MGC_VAL"); 73 if (flags) 74 tprints("|"); 75 } 76 if (flags || !old_magic) 77 printflags(mount_flags, flags, "MS_???"); 78 tprints(", "); 79 80 if (ignore_data) 81 printaddr(tcp->u_arg[4]); 82 else 83 printstr(tcp, tcp->u_arg[4], -1); 84 85 return RVAL_DECODED; 86 } 87
