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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
* Copyright (c) 2006-2007 Ulrich Drepper <drepper@redhat.com>
* Copyright (c) 2009-2013 Denys Vlasenko <dvlasenk@redhat.com>
* Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2014-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "defs.h"
#include <fcntl.h>
/* some libcs are guilty of messing up with O_ACCMODE */
#undef O_ACCMODE
#define O_ACCMODE 03
#ifdef O_LARGEFILE
# if O_LARGEFILE == 0 /* biarch platforms in 64-bit mode */
# undef O_LARGEFILE
# ifdef SPARC64
# define O_LARGEFILE 0x40000
# elif defined X86_64 || defined S390X
# define O_LARGEFILE 0100000
# endif
# endif
#endif
#include "xlat/open_access_modes.h"
#include "xlat/open_mode_flags.h"
#ifndef AT_FDCWD
# define AT_FDCWD -100
#endif
/* The fd is an "int", so when decoding x86 on x86_64, we need to force sign
* extension to get the right value. We do this by declaring fd as int here.
*/
void
print_dirfd(struct tcb *tcp, int fd)
{
if (fd == AT_FDCWD)
tprints("AT_FDCWD, ");
else {
printfd(tcp, fd);
tprints(", ");
}
}
/*
* low bits of the open(2) flags define access mode,
* other bits are real flags.
*/
const char *
sprint_open_modes(unsigned int flags)
{
static char outstr[(1 + ARRAY_SIZE(open_mode_flags)) * sizeof("O_LARGEFILE")];
char *p;
char sep;
const char *str;
const struct xlat *x;
sep = ' ';
p = stpcpy(outstr, "flags");
str = xlookup(open_access_modes, flags & 3);
if (str) {
*p++ = sep;
p = stpcpy(p, str);
flags &= ~3;
if (!flags)
return outstr;
sep = '|';
}
for (x = open_mode_flags; x->str; x++) {
if ((flags & x->val) == x->val) {
*p++ = sep;
p = stpcpy(p, x->str);
flags &= ~x->val;
if (!flags)
return outstr;
sep = '|';
}
}
/* flags is still nonzero */
*p++ = sep;
sprintf(p, "%#x", flags);
return outstr;
}
void
tprint_open_modes(unsigned int flags)
{
tprints(sprint_open_modes(flags) + sizeof("flags"));
}
#ifdef O_TMPFILE
/* The kernel & C libraries often inline O_DIRECTORY. */
# define STRACE_O_TMPFILE (O_TMPFILE & ~O_DIRECTORY)
#else /* !O_TMPFILE */
# define STRACE_O_TMPFILE 0
#endif
static int
decode_open(struct tcb *tcp, int offset)
{
printpath(tcp, tcp->u_arg[offset]);
tprints(", ");
/* flags */
tprint_open_modes(tcp->u_arg[offset + 1]);
if (tcp->u_arg[offset + 1] & (O_CREAT | STRACE_O_TMPFILE)) {
/* mode */
tprints(", ");
print_numeric_umode_t(tcp->u_arg[offset + 2]);
}
return RVAL_DECODED | RVAL_FD;
}
SYS_FUNC(open)
{
return decode_open(tcp, 0);
}
SYS_FUNC(openat)
{
print_dirfd(tcp, tcp->u_arg[0]);
return decode_open(tcp, 1);
}
SYS_FUNC(creat)
{
printpath(tcp, tcp->u_arg[0]);
tprints(", ");
print_numeric_umode_t(tcp->u_arg[1]);
return RVAL_DECODED | RVAL_FD;
}
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