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 */
60void
61print_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 */
75const char *
76sprint_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
112void
113tprint_open_modes(int flags)
114{
115	tprints(sprint_open_modes(flags) + sizeof("flags"));
116}
117
118static int
119decode_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
133SYS_FUNC(open)
134{
135	return decode_open(tcp, 0);
136}
137
138SYS_FUNC(openat)
139{
140	print_dirfd(tcp, tcp->u_arg[0]);
141	return decode_open(tcp, 1);
142}
143
144SYS_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