/
term.c
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/
term.c
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/*
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-2017 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"
/*
* The C library's definition of struct termios might differ from
* the kernel one, and we need to use the kernel layout.
*/
#include <linux/termios.h>
#include "xlat/tcxonc_options.h"
#include "xlat/tcflsh_options.h"
#include "xlat/baud_options.h"
#include "xlat/modem_flags.h"
static void
decode_termios(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct termios tios;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &tios))
return;
if (abbrev(tcp)) {
tprints("{");
printxval(baud_options, tios.c_cflag & CBAUD, "B???");
tprintf(" %sopost %sisig %sicanon %secho ...}",
(tios.c_oflag & OPOST) ? "" : "-",
(tios.c_lflag & ISIG) ? "" : "-",
(tios.c_lflag & ICANON) ? "" : "-",
(tios.c_lflag & ECHO) ? "" : "-");
return;
}
tprintf("{c_iflags=%#lx, c_oflags=%#lx, ",
(long) tios.c_iflag, (long) tios.c_oflag);
tprintf("c_cflags=%#lx, c_lflags=%#lx, ",
(long) tios.c_cflag, (long) tios.c_lflag);
tprintf("c_line=%u, ", tios.c_line);
if (!(tios.c_lflag & ICANON))
tprintf("c_cc[VMIN]=%d, c_cc[VTIME]=%d, ",
tios.c_cc[VMIN], tios.c_cc[VTIME]);
tprints("c_cc=");
print_quoted_string((char *) tios.c_cc, NCCS, QUOTE_FORCE_HEX);
tprints("}");
}
static void
decode_termio(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct termio tio;
int i;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &tio))
return;
if (abbrev(tcp)) {
tprints("{");
printxval(baud_options, tio.c_cflag & CBAUD, "B???");
tprintf(" %sopost %sisig %sicanon %secho ...}",
(tio.c_oflag & OPOST) ? "" : "-",
(tio.c_lflag & ISIG) ? "" : "-",
(tio.c_lflag & ICANON) ? "" : "-",
(tio.c_lflag & ECHO) ? "" : "-");
return;
}
tprintf("{c_iflags=%#lx, c_oflags=%#lx, ",
(long) tio.c_iflag, (long) tio.c_oflag);
tprintf("c_cflags=%#lx, c_lflags=%#lx, ",
(long) tio.c_cflag, (long) tio.c_lflag);
tprintf("c_line=%u, ", tio.c_line);
#ifdef _VMIN
if (!(tio.c_lflag & ICANON))
tprintf("c_cc[_VMIN]=%d, c_cc[_VTIME]=%d, ",
tio.c_cc[_VMIN], tio.c_cc[_VTIME]);
#else /* !_VMIN */
if (!(tio.c_lflag & ICANON))
tprintf("c_cc[VMIN]=%d, c_cc[VTIME]=%d, ",
tio.c_cc[VMIN], tio.c_cc[VTIME]);
#endif /* !_VMIN */
tprints("c_cc=\"");
for (i = 0; i < NCC; i++)
tprintf("\\x%02x", tio.c_cc[i]);
tprints("\"}");
}
static void
decode_winsize(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct winsize ws;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &ws))
return;
tprintf("{ws_row=%d, ws_col=%d, ws_xpixel=%d, ws_ypixel=%d}",
ws.ws_row, ws.ws_col, ws.ws_xpixel, ws.ws_ypixel);
}
#ifdef TIOCGSIZE
static void
decode_ttysize(struct tcb *const tcp, const kernel_ulong_t addr)
{
struct ttysize ts;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &ts))
return;
tprintf("{ts_lines=%d, ts_cols=%d}",
ts.ts_lines, ts.ts_cols);
}
#endif
static void
decode_modem_flags(struct tcb *const tcp, const kernel_ulong_t addr)
{
int i;
tprints(", ");
if (umove_or_printaddr(tcp, addr, &i))
return;
tprints("[");
printflags(modem_flags, i, "TIOCM_???");
tprints("]");
}
int
term_ioctl(struct tcb *const tcp, const unsigned int code,
const kernel_ulong_t arg)
{
switch (code) {
/* struct termios */
case TCGETS:
#ifdef TCGETS2
case TCGETS2:
#endif
case TIOCGLCKTRMIOS:
if (entering(tcp))
return 0;
case TCSETS:
#ifdef TCSETS2
case TCSETS2:
#endif
case TCSETSW:
#ifdef TCSETSW2
case TCSETSW2:
#endif
case TCSETSF:
#ifdef TCSETSF2
case TCSETSF2:
#endif
case TIOCSLCKTRMIOS:
decode_termios(tcp, arg);
break;
/* struct termio */
case TCGETA:
if (entering(tcp))
return 0;
case TCSETA:
case TCSETAW:
case TCSETAF:
decode_termio(tcp, arg);
break;
/* struct winsize */
case TIOCGWINSZ:
if (entering(tcp))
return 0;
case TIOCSWINSZ:
decode_winsize(tcp, arg);
break;
/* struct ttysize */
#ifdef TIOCGSIZE
case TIOCGSIZE:
if (entering(tcp))
return 0;
case TIOCSSIZE:
decode_ttysize(tcp, arg);
break;
#endif
/* ioctls with a direct decodable arg */
case TCXONC:
tprints(", ");
printxval64(tcxonc_options, arg, "TC???");
break;
case TCFLSH:
tprints(", ");
printxval64(tcflsh_options, arg, "TC???");
break;
case TCSBRK:
case TCSBRKP:
case TIOCSCTTY:
tprintf(", %d", (int) arg);
break;
/* ioctls with an indirect parameter displayed as modem flags */
case TIOCMGET:
if (entering(tcp))
return 0;
case TIOCMBIS:
case TIOCMBIC:
case TIOCMSET:
decode_modem_flags(tcp, arg);
break;
/* ioctls with an indirect parameter displayed in decimal */
case TIOCGPGRP:
case TIOCGSID:
case TIOCGETD:
case TIOCGSOFTCAR:
case TIOCGPTN:
case FIONREAD:
case TIOCOUTQ:
#ifdef TIOCGEXCL
case TIOCGEXCL:
#endif
#ifdef TIOCGDEV
case TIOCGDEV:
#endif
if (entering(tcp))
return 0;
case TIOCSPGRP:
case TIOCSETD:
case FIONBIO:
case FIOASYNC:
case TIOCPKT:
case TIOCSSOFTCAR:
case TIOCSPTLCK:
tprints(", ");
printnum_int(tcp, arg, "%d");
break;
/* ioctls with an indirect parameter displayed as a char */
case TIOCSTI:
tprints(", ");
printstrn(tcp, arg, 1);
break;
/* ioctls with no parameters */
case TIOCSBRK:
case TIOCCBRK:
case TIOCCONS:
case TIOCNOTTY:
case TIOCEXCL:
case TIOCNXCL:
case FIOCLEX:
case FIONCLEX:
#ifdef TIOCVHANGUP
case TIOCVHANGUP:
#endif
#ifdef TIOCSSERIAL
case TIOCSSERIAL:
#endif
break;
/* ioctls which are unknown */
default:
return RVAL_DECODED;
}
return RVAL_IOCTL_DECODED;
}