2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
7 * Copyright (c) 2006-2007 Ulrich Drepper <drepper@redhat.com>
8 * Copyright (c) 2009-2013 Denys Vlasenko <dvlasenk@redhat.com>
9 * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
10 * Copyright (c) 2014-2017 The strace developers.
11 * All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 /* some libcs are guilty of messing up with O_ACCMODE */
46 # if O_LARGEFILE == 0 /* biarch platforms in 64-bit mode */
49 # define O_LARGEFILE 0x40000
50 # elif defined X86_64 || defined S390X
51 # define O_LARGEFILE 0100000
56 #include "xlat/open_access_modes.h"
57 #include "xlat/open_mode_flags.h"
60 # define AT_FDCWD -100
63 /* The fd is an "int", so when decoding x86 on x86_64, we need to force sign
64 * extension to get the right value. We do this by declaring fd as int here.
67 print_dirfd(struct tcb *tcp, int fd)
70 tprints("AT_FDCWD, ");
78 * low bits of the open(2) flags define access mode,
79 * other bits are real flags.
82 sprint_open_modes(unsigned int flags)
84 static char outstr[(1 + ARRAY_SIZE(open_mode_flags)) * sizeof("O_LARGEFILE")];
91 p = stpcpy(outstr, "flags");
92 str = xlookup(open_access_modes, flags & 3);
102 for (x = open_mode_flags; x->str; x++) {
103 if ((flags & x->val) == x->val) {
105 p = stpcpy(p, x->str);
112 /* flags is still nonzero */
114 p = xappendstr(outstr, p, "%#x", flags);
119 tprint_open_modes(unsigned int flags)
121 tprints(sprint_open_modes(flags) + sizeof("flags"));
125 /* The kernel & C libraries often inline O_DIRECTORY. */
126 # define STRACE_O_TMPFILE (O_TMPFILE & ~O_DIRECTORY)
127 #else /* !O_TMPFILE */
128 # define STRACE_O_TMPFILE 0
132 decode_open(struct tcb *tcp, int offset)
134 printpath(tcp, tcp->u_arg[offset]);
137 tprint_open_modes(tcp->u_arg[offset + 1]);
138 if (tcp->u_arg[offset + 1] & (O_CREAT | STRACE_O_TMPFILE)) {
141 print_numeric_umode_t(tcp->u_arg[offset + 2]);
144 return RVAL_DECODED | RVAL_FD;
149 return decode_open(tcp, 0);
154 print_dirfd(tcp, tcp->u_arg[0]);
155 return decode_open(tcp, 1);
160 printpath(tcp, tcp->u_arg[0]);
162 print_numeric_umode_t(tcp->u_arg[1]);
164 return RVAL_DECODED | RVAL_FD;