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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 UTC vs.
Revision 1.63 by root, Tue Oct 3 11:21:33 2006 UTC

1// This file is part of libptytty. Do not make local modifications.
2// http://software.schmorp.de/pkg/libptytty
3
1/*--------------------------------*-C-*---------------------------------* 4/*----------------------------------------------------------------------*
2 * File: ptytty.C 5 * File: ptytty.C
3 *----------------------------------------------------------------------* 6 *----------------------------------------------------------------------*
4 * 7 *
5 * All portions of code are copyright by their respective author/s. 8 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
8 * 12 *
9 * This program is free software; you can redistribute it and/or modify 13 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by 14 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 16 * (at your option) any later version.
… …
19 * You should have received a copy of the GNU General Public License 23 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 26 *---------------------------------------------------------------------*/
23 27
24#include "../config.h" /* NECESSARY */ 28#include "../config.h"
29
25#include "rxvt.h" 30#include "ptytty.h"
26 31
27# include <cstdlib> 32#include <cstdlib>
28# include <cstring> 33#include <cstring>
34#include <csignal>
29 35
30#ifdef HAVE_SYS_TYPES_H
31# include <sys/types.h> 36#include <sys/types.h>
32#endif
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 37#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 38#include <fcntl.h>
38#endif 39
39#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 41# include <sys/ioctl.h>
41#endif 42#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
44#endif 45#endif
45#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
46# include <stropts.h> 47# include <stropts.h>
47#endif 48#endif
… …
50#elif defined(HAVE_LIBUTIL_H) 51#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 52# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 53#elif defined(HAVE_UTIL_H)
53# include <util.h> 54# include <util.h>
54#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
55 59
56#include <cstdio> 60#include <cstdio>
57#include <grp.h>
58
59#include "ptytty.h"
60 61
61///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
62 63
63/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
64 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
66/* 67/*
67 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
68 * If successful, ttydev is set to the name of the slave device. 69 * If successful, ttydev is set to the name of the slave device.
69 * fd_tty _may_ also be set to an open fd to the slave device 70 * fd_tty _may_ also be set to an open fd to the slave device
70 */ 71 */
72#if defined(UNIX98_PTY)
73
71static int 74 static int
72get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
73{ 76 {
74 int pfd; 77 int pfd;
75 78
76#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
77 char tty_name[sizeof "/dev/pts/????\0"];
78
79 rxvt_privileges(RESTORE);
80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1)
84 {
85 *ttydev = strdup (tty_name);
86 return pfd;
87 }
88#endif
89
90#ifdef PTYS_ARE__GETPTY
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL)
93 return pfd;
94#endif
95
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
98
99 {
100# ifdef PTYS_ARE_GETPT
101 pfd = getpt(); 80 pfd = getpt();
102# else 81# elif defined(HAVE_POSIX_OPENPT)
103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
105# else 83# else
106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
107# endif 85# endif
108# endif
109 86
110 if (pfd >= 0) 87 if (pfd >= 0)
111 { 88 {
112 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
113 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
114 { /* slave now unlocked */ 91 { /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd; 93 return pfd;
117 } 94 }
95
118 close (pfd); 96 close (pfd);
119 } 97 }
120 }
121# endif
122#endif
123 98
124#ifdef PTYS_ARE_PTC 99 return -1;
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 100 }
101
102#elif defined(HAVE_OPENPTY)
103
104 static int
105 get_pty (int *fd_tty, char **ttydev)
106 {
107 int pfd;
108 int res;
109 char tty_name[32];
126 { 110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
114 {
127 *ttydev = strdup (ttyname (pfd)); 115 *ttydev = strdup (tty_name);
116 return pfd;
117 }
118
119 return -1;
120 }
121
122#elif defined(HAVE__GETPTY)
123
124 static int
125 get_pty (int *fd_tty, char **ttydev)
126 {
127 int pfd;
128
129 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (*ttydev != NULL)
128 return pfd; 132 return pfd;
133
134 return -1;
135 }
136
137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
146 *ttydev = strdup (ttyname (pfd));
147 return pfd;
129 } 148 }
130#endif
131 149
132#ifdef PTYS_ARE_CLONE 150 return -1;
151 }
152
153#elif defined(HAVE_DEV_CLONE)
154
155 static int
156 get_pty (int *fd_tty, char **ttydev)
157 {
158 int pfd;
159
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 161 {
135 *ttydev = strdup (ptsname (pfd)); 162 *ttydev = strdup (ptsname (pfd));
136 return pfd; 163 return pfd;
137 } 164 }
138#endif
139 165
140#ifdef PTYS_ARE_NUMERIC 166 return -1;
167 }
168
169#else
170
171 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
172 static int
173 get_pty (int *fd_tty, char **ttydev)
141 { 174 {
175 int pfd;
142 int idx; 176 int i;
143 char *c1, *c2; 177 char pty_name[32];
144 char pty_name[] = "/dev/ptyp???"; 178 char tty_name[32];
145 char tty_name[] = "/dev/ttyp???"; 179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
146 181
147 c1 = &(pty_name[sizeof (pty_name) - 4]);
148 c2 = &(tty_name[sizeof (tty_name) - 4]);
149 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
150 { 183 {
151 sprintf (c1, "%d", idx); 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
152 sprintf (c2, "%d", idx); 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
153 if (access (tty_name, F_OK) < 0) 186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
154 { 188 {
155 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
156 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
157 } 193 }
158 194
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
160 { 196 {
161 if (access (tty_name, R_OK | W_OK) == 0)
162 {
163 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
164 return pfd; 198 return pfd;
165 }
166
167 close (pfd);
168 } 199 }
169 }
170 }
171#endif
172 200
173#ifdef PTYS_ARE_SEARCHED 201 close (pfd);
174 {
175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??";
178
179# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz"
181# endif
182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef"
184# endif
185
186 for (c1 = PTYCHAR1; *c1; c1++)
187 { 202 }
188 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++)
191 {
192 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 {
196 if (access (tty_name, R_OK | W_OK) == 0)
197 {
198 *ttydev = strdup (tty_name);
199 return pfd;
200 }
201 203
202 close (pfd);
203 }
204 }
205 }
206 }
207#endif
208
209 return -1; 204 return -1;
210} 205 }
206
207#endif
211 208
212/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
213/* 210/*
214 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
215 */ 212 */
… …
224 * Make our tty a controlling tty so that /dev/tty points to us 221 * Make our tty a controlling tty so that /dev/tty points to us
225 */ 222 */
226static int 223static int
227control_tty (int fd_tty) 224control_tty (int fd_tty)
228{ 225{
229 int fd;
230
231 /* ---------------------------------------- */
232 setsid (); 226 setsid ();
233 227
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 229 /*
237 * Push STREAMS modules: 230 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 241 * documentation is really unclear about whether it is any close () on
249 * the master side or the last close () - i.e. a proper STREAMS dismantling 242 * the master side or the last close () - i.e. a proper STREAMS dismantling
250 * close () - on the master side which causes a hang up to be sent 243 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 244 * through - Geoff Wing
252 */ 245 */
253# ifdef HAVE_ISASTREAM 246# ifdef HAVE_ISASTREAM
254 if (isastream (fd_tty) == 1) 247 if (isastream (fd_tty) == 1)
255# endif 248# endif
256 { 249 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 253 }
261# endif 254#endif
262 /* ---------------------------------------- */ 255
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 257
265 fd = open ("/dev/tty", O_WRONLY); 258 int fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 259 if (fd < 0)
267 return -1; /* fatal */ 260 return -1; /* fatal */
261
268 close (fd); 262 close (fd);
269 /* ---------------------------------------- */
270 263
271 return 0; 264 return 0;
272} 265}
273 266
274void 267void
275rxvt_ptytty::close_tty () 268ptytty::close_tty ()
276{ 269{
277 if (tty < 0) 270 if (tty < 0)
278 return; 271 return;
279 272
280 close (tty); 273 close (tty);
281 tty = -1; 274 tty = -1;
282} 275}
283 276
284bool 277bool
285rxvt_ptytty::make_controlling_tty () 278ptytty::make_controlling_tty ()
286{ 279{
287 return control_tty (tty) >= 0; 280 return control_tty (tty) >= 0;
288} 281}
289 282
290void 283void
291rxvt_ptytty::set_utf8_mode (bool on) 284ptytty::set_utf8_mode (bool on)
292{ 285{
293#ifdef IUTF8 286#ifdef IUTF8
294 if (pty < 0) 287 if (pty < 0)
295 return; 288 return;
296 289
… …
312 } 305 }
313 } 306 }
314#endif 307#endif
315} 308}
316 309
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 310static struct ttyconf {
321 gid_t gid; 311 gid_t gid;
322 mode_t mode; 312 mode_t mode;
323 313
324 ttyconf () 314 ttyconf ()
… …
333 } 323 }
334 else 324 else
335#endif /* TTY_GID_SUPPORT */ 325#endif /* TTY_GID_SUPPORT */
336 { 326 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 328 gid = 0;
339 } 329 }
340 } 330 }
341} ttyconf; 331} ttyconf;
342 332
343///////////////////////////////////////////////////////////////////////////// 333ptytty_unix::ptytty_unix ()
334{
335 name = 0;
336#if UTMP_SUPPORT
337 cmd_pid = 0;
338#endif
339}
340
341ptytty_unix::~ptytty_unix ()
342{
343#if UTMP_SUPPORT
344 logout ();
345#endif
346 put ();
347}
344 348
345void 349void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 350ptytty_unix::put ()
347{ 351{
348 if (!name || !*name) 352 if (name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357 if (lstat (name, &savestat) < 0) /* you lose out */
358 ;
359 else
360# endif
361 {
362 saved = true;
363 chown (name, getuid (), ttyconf.gid); /* fail silently */
364 chmod (name, ttyconf.mode);
365# ifdef HAVE_REVOKE
366 revoke (name);
367# endif
368 }
369 } 353 {
370 else 354 chmod (name, RESTORE_TTY_MODE);
371 { /* action == RESTORE */
372# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373 if (saved)
374 {
375 chmod (name, savestat.st_mode);
376 chown (name, savestat.st_uid, savestat.st_gid);
377 }
378# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0); 355 chown (name, 0, ttyconf.gid);
381# endif
382
383 } 356 }
384 357
385 rxvt_privileges (IGNORE); 358 close_tty ();
386}
387#endif
388 359
389rxvt_ptytty_unix::rxvt_ptytty_unix () 360 if (pty >= 0)
390{ 361 close (pty);
362
363 free (name);
364
391 pty = tty = -1; 365 pty = tty = -1;
392 name = 0; 366 name = 0;
393#ifndef NO_SETOWNER_TTYDEV
394 saved = false;
395#endif
396#if UTMP_SUPPORT
397 cmd_pid = 0;
398#endif
399}
400
401rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{
403 logout ();
404 put ();
405}
406
407void
408rxvt_ptytty_unix::put ()
409{
410#ifndef NO_SETOWNER_TTYDEV
411 privileges (RESTORE);
412#endif
413
414 if (pty >= 0) close (pty);
415 close_tty ();
416 free (name);
417
418 pty = tty = -1;
419 name = 0;
420} 367}
421 368
422bool 369bool
423rxvt_ptytty_unix::get () 370ptytty_unix::get ()
424{ 371{
425 /* get master (pty) */ 372 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 373 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 374 return false;
428 375
… …
430 377
431 /* get slave (tty) */ 378 /* get slave (tty) */
432 if (tty < 0) 379 if (tty < 0)
433 { 380 {
434#ifndef NO_SETOWNER_TTYDEV 381#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 382 chown (name, getuid (), ttyconf.gid); /* fail silently */
383 chmod (name, ttyconf.mode);
384# ifdef HAVE_REVOKE
385 revoke (name);
386# endif
436#endif 387#endif
437 388
438 if ((tty = get_tty (name)) < 0) 389 if ((tty = get_tty (name)) < 0)
439 { 390 {
440 put (); 391 put ();
… …
443 } 394 }
444 395
445 return true; 396 return true;
446} 397}
447 398
448// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty ()
450{
451 return new rxvt_ptytty_unix;
452}
453
454/*----------------------- end-of-file (C source) -----------------------*/
455

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