1 /*
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 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include "defs.h"
36
37 #include <fcntl.h>
38
39 #ifdef O_LARGEFILE
40 # if O_LARGEFILE == 0 /* biarch platforms in 64-bit mode */
41 # undef O_LARGEFILE
42 # ifdef SPARC64
43 # define O_LARGEFILE 0x40000
44 # elif defined X86_64 || defined S390X
45 # define O_LARGEFILE 0100000
46 # endif
47 # endif
48 #endif
49
50 #include "xlat/open_access_modes.h"
51 #include "xlat/open_mode_flags.h"
52
53 #ifndef AT_FDCWD
54 # define AT_FDCWD -100
55 #endif
56
57 /* The fd is an "int", so when decoding x86 on x86_64, we need to force sign
58 * extension to get the right value. We do this by declaring fd as int here.
59 */
60 void
print_dirfd(struct tcb * tcp,int fd)61 print_dirfd(struct tcb *tcp, int fd)
62 {
63 if (fd == AT_FDCWD)
64 tprints("AT_FDCWD, ");
65 else {
66 printfd(tcp, fd);
67 tprints(", ");
68 }
69 }
70
71 /*
72 * low bits of the open(2) flags define access mode,
73 * other bits are real flags.
74 */
75 const char *
sprint_open_modes(int flags)76 sprint_open_modes(int flags)
77 {
78 static char outstr[(1 + ARRAY_SIZE(open_mode_flags)) * sizeof("O_LARGEFILE")];
79 char *p;
80 char sep;
81 const char *str;
82 const struct xlat *x;
83
84 sep = ' ';
85 p = stpcpy(outstr, "flags");
86 str = xlookup(open_access_modes, flags & 3);
87 if (str) {
88 *p++ = sep;
89 p = stpcpy(p, str);
90 flags &= ~3;
91 if (!flags)
92 return outstr;
93 sep = '|';
94 }
95
96 for (x = open_mode_flags; x->str; x++) {
97 if ((flags & x->val) == x->val) {
98 *p++ = sep;
99 p = stpcpy(p, x->str);
100 flags &= ~x->val;
101 if (!flags)
102 return outstr;
103 sep = '|';
104 }
105 }
106 /* flags is still nonzero */
107 *p++ = sep;
108 sprintf(p, "%#x", flags);
109 return outstr;
110 }
111
112 void
tprint_open_modes(int flags)113 tprint_open_modes(int flags)
114 {
115 tprints(sprint_open_modes(flags) + sizeof("flags"));
116 }
117
118 static int
decode_open(struct tcb * tcp,int offset)119 decode_open(struct tcb *tcp, int offset)
120 {
121 printpath(tcp, tcp->u_arg[offset]);
122 tprints(", ");
123 /* flags */
124 tprint_open_modes(tcp->u_arg[offset + 1]);
125 if (tcp->u_arg[offset + 1] & O_CREAT) {
126 /* mode */
127 tprintf(", %#lo", tcp->u_arg[offset + 2]);
128 }
129
130 return RVAL_DECODED | RVAL_FD;
131 }
132
SYS_FUNC(open)133 SYS_FUNC(open)
134 {
135 return decode_open(tcp, 0);
136 }
137
SYS_FUNC(openat)138 SYS_FUNC(openat)
139 {
140 print_dirfd(tcp, tcp->u_arg[0]);
141 return decode_open(tcp, 1);
142 }
143
SYS_FUNC(creat)144 SYS_FUNC(creat)
145 {
146 printpath(tcp, tcp->u_arg[0]);
147 tprintf(", %#lo", tcp->u_arg[1]);
148
149 return RVAL_DECODED | RVAL_FD;
150 }
151