You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
164 lines
4.4 KiB
164 lines
4.4 KiB
/* |
|
* 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; |
|
}
|
|
|