Dmitry V. Levin
b172a94d02
* defs.h (umove_ulong_array_or_printaddr): New prototype. * util.c (umove_ulong_array_or_printaddr): New function. * desc.c (sys_pselect6): Use it instead of open-coding a proxy struct parser for different personalities. * io.c (tprint_iov_upto): Use it instead of open-coding a struct iovec parser for different personalities. * kexec.c (print_kexec_segments): Use it instead of open-coding a struct kexec_segment parser for different personalities. (print_seg): Pass arguments using an array.
457 lines
10 KiB
C
457 lines
10 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include <fcntl.h>
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#include <sys/file.h>
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#include "xlat/fcntlcmds.h"
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#include "xlat/fdflags.h"
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#include "xlat/flockcmds.h"
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#include "xlat/lockfcmds.h"
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#include "xlat/notifyflags.h"
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/*
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* Assume that F_SETLK64, F_SETLKW64, and F_GETLK64 are either defined
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* or not defined altogether.
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*/
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#if defined(F_SETLK64) && F_SETLK64 + 0 != F_SETLK
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# define USE_PRINTFLOCK64 1
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#else
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# define USE_PRINTFLOCK64 0
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#endif
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#if USE_PRINTFLOCK64
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# ifndef HAVE_STRUCT_FLOCK64
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struct flock64 {
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short int l_type, l_whence;
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int64_t l_start, l_len;
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int l_pid;
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};
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# endif
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static void
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printflock64(struct tcb *tcp, long addr, int getlk)
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{
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struct flock64 fl;
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if (umove_or_printaddr(tcp, addr, &fl))
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return;
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tprints("{type=");
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printxval(lockfcmds, fl.l_type, "F_???");
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tprints(", whence=");
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printxval(whence_codes, fl.l_whence, "SEEK_???");
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tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
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if (getlk)
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tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
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else
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tprints("}");
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}
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#endif /* USE_PRINTFLOCK64 */
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static void
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printflock(struct tcb *tcp, long addr, int getlk)
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{
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struct flock fl;
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#if SUPPORTED_PERSONALITIES > 1
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if (
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# if SIZEOF_OFF_T > SIZEOF_LONG
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current_personality != DEFAULT_PERSONALITY &&
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# endif
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current_wordsize != sizeof(fl.l_start)) {
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if (current_wordsize == 4) {
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/* 32-bit x86 app on x86_64 and similar cases */
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struct {
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short int l_type;
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short int l_whence;
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int32_t l_start; /* off_t */
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int32_t l_len; /* off_t */
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int32_t l_pid; /* pid_t */
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} fl32;
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if (umove_or_printaddr(tcp, addr, &fl32))
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return;
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fl.l_type = fl32.l_type;
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fl.l_whence = fl32.l_whence;
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fl.l_start = fl32.l_start;
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fl.l_len = fl32.l_len;
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fl.l_pid = fl32.l_pid;
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} else {
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/* let people know we have a problem here */
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tprintf("<decode error: unsupported wordsize %d>",
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current_wordsize);
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return;
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}
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} else
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#endif
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if (umove_or_printaddr(tcp, addr, &fl))
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return;
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tprints("{type=");
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printxval(lockfcmds, fl.l_type, "F_???");
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tprints(", whence=");
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printxval(whence_codes, fl.l_whence, "SEEK_???");
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#if SIZEOF_OFF_T > SIZEOF_LONG
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tprintf(", start=%lld, len=%lld", fl.l_start, fl.l_len);
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#else
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tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
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#endif
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if (getlk)
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tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
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else
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tprints("}");
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}
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SYS_FUNC(fcntl)
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{
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if (entering(tcp)) {
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printxval(fcntlcmds, tcp->u_arg[1], "F_???");
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switch (tcp->u_arg[1]) {
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case F_SETFD:
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tprints(", ");
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printflags(fdflags, tcp->u_arg[2], "FD_???");
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break;
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case F_SETOWN: case F_DUPFD:
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#ifdef F_DUPFD_CLOEXEC
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case F_DUPFD_CLOEXEC:
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#endif
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tprintf(", %ld", tcp->u_arg[2]);
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break;
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case F_SETFL:
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tprints(", ");
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tprint_open_modes(tcp->u_arg[2]);
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break;
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case F_SETLK: case F_SETLKW:
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tprints(", ");
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printflock(tcp, tcp->u_arg[2], 0);
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break;
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#if USE_PRINTFLOCK64
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case F_SETLK64: case F_SETLKW64:
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tprints(", ");
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printflock64(tcp, tcp->u_arg[2], 0);
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break;
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#endif /* USE_PRINTFLOCK64 */
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#ifdef F_NOTIFY
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case F_NOTIFY:
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tprints(", ");
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printflags(notifyflags, tcp->u_arg[2], "DN_???");
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break;
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#endif
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#ifdef F_SETLEASE
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case F_SETLEASE:
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tprints(", ");
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printxval(lockfcmds, tcp->u_arg[2], "F_???");
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break;
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#endif
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}
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} else {
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switch (tcp->u_arg[1]) {
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case F_DUPFD:
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#ifdef F_DUPFD_CLOEXEC
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case F_DUPFD_CLOEXEC:
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#endif
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case F_SETFD: case F_SETFL:
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case F_SETLK: case F_SETLKW:
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case F_SETOWN: case F_GETOWN:
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#ifdef F_NOTIFY
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case F_NOTIFY:
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#endif
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#ifdef F_SETLEASE
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case F_SETLEASE:
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#endif
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break;
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case F_GETFD:
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if (syserror(tcp) || tcp->u_rval == 0)
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return 0;
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tcp->auxstr = sprintflags("flags ", fdflags, tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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case F_GETFL:
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if (syserror(tcp))
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return 0;
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tcp->auxstr = sprint_open_modes(tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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case F_GETLK:
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tprints(", ");
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printflock(tcp, tcp->u_arg[2], 1);
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break;
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#if USE_PRINTFLOCK64
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case F_GETLK64:
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tprints(", ");
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printflock64(tcp, tcp->u_arg[2], 1);
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break;
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#endif
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#ifdef F_GETLEASE
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case F_GETLEASE:
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if (syserror(tcp))
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return 0;
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tcp->auxstr = xlookup(lockfcmds, tcp->u_rval);
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return RVAL_HEX|RVAL_STR;
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#endif
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default:
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tprintf(", %#lx", tcp->u_arg[2]);
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break;
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}
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}
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return 0;
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}
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#ifdef LOCK_SH
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SYS_FUNC(flock)
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{
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
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return RVAL_DECODED;
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}
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#endif /* LOCK_SH */
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SYS_FUNC(close)
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{
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printfd(tcp, tcp->u_arg[0]);
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return RVAL_DECODED;
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}
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SYS_FUNC(dup)
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{
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printfd(tcp, tcp->u_arg[0]);
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return RVAL_DECODED | RVAL_FD;
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}
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static int
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do_dup2(struct tcb *tcp, int flags_arg)
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{
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printfd(tcp, tcp->u_arg[1]);
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if (flags_arg >= 0) {
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tprints(", ");
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printflags(open_mode_flags, tcp->u_arg[flags_arg], "O_???");
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}
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return RVAL_DECODED | RVAL_FD;
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}
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SYS_FUNC(dup2)
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{
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return do_dup2(tcp, -1);
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}
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SYS_FUNC(dup3)
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{
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return do_dup2(tcp, 2);
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}
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#if defined(ALPHA)
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SYS_FUNC(getdtablesize)
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{
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return 0;
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}
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#endif
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static int
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decode_select(struct tcb *tcp, long *args, enum bitness_t bitness)
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{
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int i, j;
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int nfds, fdsize;
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fd_set *fds = NULL;
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const char *sep;
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long arg;
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/* Kernel truncates arg[0] to int, we do the same. */
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nfds = (int) args[0];
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/* Kernel rejects negative nfds, so we don't parse it either. */
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if (nfds < 0)
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nfds = 0;
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/* Beware of select(2^31-1, NULL, NULL, NULL) and similar... */
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if (nfds > 1024*1024)
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nfds = 1024*1024;
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/*
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* We had bugs a-la "while (j < args[0])" and "umoven(args[0])" below.
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* Instead of args[0], use nfds for fd count, fdsize for array lengths.
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*/
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fdsize = (((nfds + 7) / 8) + current_wordsize-1) & -current_wordsize;
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if (entering(tcp)) {
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tprintf("%d", (int) args[0]);
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if (verbose(tcp) && fdsize > 0)
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fds = malloc(fdsize);
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for (i = 0; i < 3; i++) {
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arg = args[i+1];
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tprints(", ");
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if (!fds) {
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printaddr(arg);
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continue;
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}
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if (umoven_or_printaddr(tcp, arg, fdsize, fds))
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continue;
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tprints("[");
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for (j = 0, sep = "";; j++) {
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j = next_set_bit(fds, j, nfds);
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if (j < 0)
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break;
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tprints(sep);
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printfd(tcp, j);
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sep = " ";
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}
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tprints("]");
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}
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free(fds);
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tprints(", ");
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printtv_bitness(tcp, args[4], bitness, 0);
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} else {
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static char outstr[1024];
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char *outptr;
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#define end_outstr (outstr + sizeof(outstr))
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int ready_fds;
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if (syserror(tcp))
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return 0;
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ready_fds = tcp->u_rval;
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if (ready_fds == 0) {
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tcp->auxstr = "Timeout";
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return RVAL_STR;
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}
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fds = malloc(fdsize);
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outptr = outstr;
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sep = "";
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for (i = 0; i < 3 && ready_fds > 0; i++) {
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int first = 1;
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arg = args[i+1];
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if (!arg || !fds || umoven(tcp, arg, fdsize, fds) < 0)
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continue;
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for (j = 0;; j++) {
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j = next_set_bit(fds, j, nfds);
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if (j < 0)
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break;
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/* +2 chars needed at the end: ']',NUL */
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if (outptr < end_outstr - (sizeof(", except [") + sizeof(int)*3 + 2)) {
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if (first) {
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outptr += sprintf(outptr, "%s%s [%u",
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sep,
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i == 0 ? "in" : i == 1 ? "out" : "except",
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j
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);
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first = 0;
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sep = ", ";
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}
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else {
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outptr += sprintf(outptr, " %u", j);
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}
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}
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if (--ready_fds == 0)
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break;
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}
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if (outptr != outstr)
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*outptr++ = ']';
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}
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free(fds);
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/* This contains no useful information on SunOS. */
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if (args[4]) {
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if (outptr < end_outstr - (10 + TIMEVAL_TEXT_BUFSIZE)) {
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outptr += sprintf(outptr, "%sleft ", sep);
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outptr = sprinttv(outptr, tcp, args[4], bitness, /*special:*/ 0);
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}
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}
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*outptr = '\0';
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tcp->auxstr = outstr;
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return RVAL_STR;
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#undef end_outstr
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}
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return 0;
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}
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SYS_FUNC(oldselect)
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{
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long long_args[5];
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#undef oldselect_args
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#if SIZEOF_LONG == 4
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# define oldselect_args long_args
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#else
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unsigned int oldselect_args[5];
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unsigned int i;
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#endif
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if (umove(tcp, tcp->u_arg[0], &oldselect_args) < 0) {
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printaddr(tcp->u_arg[0]);
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return 0;
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}
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#ifndef oldselect_args
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for (i = 0; i < 5; i++) {
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long_args[i] = oldselect_args[i];
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}
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#endif
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return decode_select(tcp, long_args, BITNESS_CURRENT);
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#undef oldselect_args
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}
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#ifdef ALPHA
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SYS_FUNC(osf_select)
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{
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return decode_select(tcp, tcp->u_arg, BITNESS_32);
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}
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#endif
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SYS_FUNC(select)
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{
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return decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
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}
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SYS_FUNC(pselect6)
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{
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int rc = decode_select(tcp, tcp->u_arg, BITNESS_CURRENT);
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if (entering(tcp)) {
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unsigned long data[2];
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tprints(", ");
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if (!umove_ulong_array_or_printaddr(tcp, tcp->u_arg[5], data,
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ARRAY_SIZE(data))) {
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tprints("{");
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/* NB: kernel requires data[1] == NSIG / 8 */
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print_sigset_addr_len(tcp, data[0], data[1]);
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tprintf(", %lu}", data[1]);
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}
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}
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return rc;
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}
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