1 /*
2 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
3 * Copyright (c) 1996-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "defs.h"
30 /*
31 * The C library's definition of struct termios might differ from
32 * the kernel one, and we need to use the kernel layout.
33 */
34 #include <linux/termios.h>
35
36 #include "xlat/tcxonc_options.h"
37 #include "xlat/tcflsh_options.h"
38 #include "xlat/baud_options.h"
39 #include "xlat/modem_flags.h"
40
41 static void
decode_termios(struct tcb * const tcp,const kernel_ulong_t addr)42 decode_termios(struct tcb *const tcp, const kernel_ulong_t addr)
43 {
44 struct termios tios;
45 int i;
46
47 tprints(", ");
48 if (umove_or_printaddr(tcp, addr, &tios))
49 return;
50 if (abbrev(tcp)) {
51 tprints("{");
52 printxval(baud_options, tios.c_cflag & CBAUD, "B???");
53 tprintf(" %sopost %sisig %sicanon %secho ...}",
54 (tios.c_oflag & OPOST) ? "" : "-",
55 (tios.c_lflag & ISIG) ? "" : "-",
56 (tios.c_lflag & ICANON) ? "" : "-",
57 (tios.c_lflag & ECHO) ? "" : "-");
58 return;
59 }
60 tprintf("{c_iflags=%#lx, c_oflags=%#lx, ",
61 (long) tios.c_iflag, (long) tios.c_oflag);
62 tprintf("c_cflags=%#lx, c_lflags=%#lx, ",
63 (long) tios.c_cflag, (long) tios.c_lflag);
64 tprintf("c_line=%u, ", tios.c_line);
65 if (!(tios.c_lflag & ICANON))
66 tprintf("c_cc[VMIN]=%d, c_cc[VTIME]=%d, ",
67 tios.c_cc[VMIN], tios.c_cc[VTIME]);
68 tprints("c_cc=\"");
69 for (i = 0; i < NCCS; i++)
70 tprintf("\\x%02x", tios.c_cc[i]);
71 tprints("\"}");
72 }
73
74 static void
decode_termio(struct tcb * const tcp,const kernel_ulong_t addr)75 decode_termio(struct tcb *const tcp, const kernel_ulong_t addr)
76 {
77 struct termio tio;
78 int i;
79
80 tprints(", ");
81 if (umove_or_printaddr(tcp, addr, &tio))
82 return;
83 if (abbrev(tcp)) {
84 tprints("{");
85 printxval(baud_options, tio.c_cflag & CBAUD, "B???");
86 tprintf(" %sopost %sisig %sicanon %secho ...}",
87 (tio.c_oflag & OPOST) ? "" : "-",
88 (tio.c_lflag & ISIG) ? "" : "-",
89 (tio.c_lflag & ICANON) ? "" : "-",
90 (tio.c_lflag & ECHO) ? "" : "-");
91 return;
92 }
93 tprintf("{c_iflags=%#lx, c_oflags=%#lx, ",
94 (long) tio.c_iflag, (long) tio.c_oflag);
95 tprintf("c_cflags=%#lx, c_lflags=%#lx, ",
96 (long) tio.c_cflag, (long) tio.c_lflag);
97 tprintf("c_line=%u, ", tio.c_line);
98 #ifdef _VMIN
99 if (!(tio.c_lflag & ICANON))
100 tprintf("c_cc[_VMIN]=%d, c_cc[_VTIME]=%d, ",
101 tio.c_cc[_VMIN], tio.c_cc[_VTIME]);
102 #else /* !_VMIN */
103 if (!(tio.c_lflag & ICANON))
104 tprintf("c_cc[VMIN]=%d, c_cc[VTIME]=%d, ",
105 tio.c_cc[VMIN], tio.c_cc[VTIME]);
106 #endif /* !_VMIN */
107 tprints("c_cc=\"");
108 for (i = 0; i < NCC; i++)
109 tprintf("\\x%02x", tio.c_cc[i]);
110 tprints("\"}");
111 }
112
113 static void
decode_winsize(struct tcb * const tcp,const kernel_ulong_t addr)114 decode_winsize(struct tcb *const tcp, const kernel_ulong_t addr)
115 {
116 struct winsize ws;
117
118 tprints(", ");
119 if (umove_or_printaddr(tcp, addr, &ws))
120 return;
121 tprintf("{ws_row=%d, ws_col=%d, ws_xpixel=%d, ws_ypixel=%d}",
122 ws.ws_row, ws.ws_col, ws.ws_xpixel, ws.ws_ypixel);
123 }
124
125 #ifdef TIOCGSIZE
126 static void
decode_ttysize(struct tcb * const tcp,const kernel_ulong_t addr)127 decode_ttysize(struct tcb *const tcp, const kernel_ulong_t addr)
128 {
129 struct ttysize ts;
130
131 tprints(", ");
132 if (umove_or_printaddr(tcp, addr, &ts))
133 return;
134 tprintf("{ts_lines=%d, ts_cols=%d}",
135 ts.ts_lines, ts.ts_cols);
136 }
137 #endif
138
139 static void
decode_modem_flags(struct tcb * const tcp,const kernel_ulong_t addr)140 decode_modem_flags(struct tcb *const tcp, const kernel_ulong_t addr)
141 {
142 int i;
143
144 tprints(", ");
145 if (umove_or_printaddr(tcp, addr, &i))
146 return;
147 tprints("[");
148 printflags(modem_flags, i, "TIOCM_???");
149 tprints("]");
150 }
151
152 int
term_ioctl(struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg)153 term_ioctl(struct tcb *const tcp, const unsigned int code,
154 const kernel_ulong_t arg)
155 {
156 switch (code) {
157 /* struct termios */
158 case TCGETS:
159 #ifdef TCGETS2
160 case TCGETS2:
161 #endif
162 case TIOCGLCKTRMIOS:
163 if (entering(tcp))
164 return 0;
165 case TCSETS:
166 #ifdef TCSETS2
167 case TCSETS2:
168 #endif
169 case TCSETSW:
170 #ifdef TCSETSW2
171 case TCSETSW2:
172 #endif
173 case TCSETSF:
174 #ifdef TCSETSF2
175 case TCSETSF2:
176 #endif
177 case TIOCSLCKTRMIOS:
178 decode_termios(tcp, arg);
179 break;
180
181 /* struct termio */
182 case TCGETA:
183 if (entering(tcp))
184 return 0;
185 case TCSETA:
186 case TCSETAW:
187 case TCSETAF:
188 decode_termio(tcp, arg);
189 break;
190
191 /* struct winsize */
192 case TIOCGWINSZ:
193 if (entering(tcp))
194 return 0;
195 case TIOCSWINSZ:
196 decode_winsize(tcp, arg);
197 break;
198
199 /* struct ttysize */
200 #ifdef TIOCGSIZE
201 case TIOCGSIZE:
202 if (entering(tcp))
203 return 0;
204 case TIOCSSIZE:
205 decode_ttysize(tcp, arg);
206 break;
207 #endif
208
209 /* ioctls with a direct decodable arg */
210 case TCXONC:
211 tprints(", ");
212 printxval64(tcxonc_options, arg, "TC???");
213 break;
214 case TCFLSH:
215 tprints(", ");
216 printxval64(tcflsh_options, arg, "TC???");
217 break;
218 case TCSBRK:
219 case TCSBRKP:
220 case TIOCSCTTY:
221 tprintf(", %d", (int) arg);
222 break;
223
224 /* ioctls with an indirect parameter displayed as modem flags */
225 case TIOCMGET:
226 if (entering(tcp))
227 return 0;
228 case TIOCMBIS:
229 case TIOCMBIC:
230 case TIOCMSET:
231 decode_modem_flags(tcp, arg);
232 break;
233
234 /* ioctls with an indirect parameter displayed in decimal */
235 case TIOCGPGRP:
236 case TIOCGSID:
237 case TIOCGETD:
238 case TIOCGSOFTCAR:
239 case TIOCGPTN:
240 case FIONREAD:
241 case TIOCOUTQ:
242 #ifdef TIOCGEXCL
243 case TIOCGEXCL:
244 #endif
245 #ifdef TIOCGDEV
246 case TIOCGDEV:
247 #endif
248 if (entering(tcp))
249 return 0;
250 case TIOCSPGRP:
251 case TIOCSETD:
252 case FIONBIO:
253 case FIOASYNC:
254 case TIOCPKT:
255 case TIOCSSOFTCAR:
256 case TIOCSPTLCK:
257 tprints(", ");
258 printnum_int(tcp, arg, "%d");
259 break;
260
261 /* ioctls with an indirect parameter displayed as a char */
262 case TIOCSTI:
263 tprints(", ");
264 printstrn(tcp, arg, 1);
265 break;
266
267 /* ioctls with no parameters */
268
269 case TIOCSBRK:
270 case TIOCCBRK:
271 case TIOCCONS:
272 case TIOCNOTTY:
273 case TIOCEXCL:
274 case TIOCNXCL:
275 case FIOCLEX:
276 case FIONCLEX:
277 #ifdef TIOCVHANGUP
278 case TIOCVHANGUP:
279 #endif
280 #ifdef TIOCSSERIAL
281 case TIOCSSERIAL:
282 #endif
283 break;
284
285 /* ioctls which are unknown */
286
287 default:
288 return RVAL_DECODED;
289 }
290
291 return RVAL_DECODED | 1;
292 }
293