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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 1.62 by ayin, Mon Sep 11 08:48:37 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)
71static int 73static int
72get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
73{ 75{
74 int pfd; 76 int pfd;
75 77
76#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
77 char tty_name[sizeof "/dev/pts/????\0"]; 79 pfd = getpt();
80# elif defined(HAVE_POSIX_OPENPT)
81 pfd = posix_openpt (O_RDWR);
82# else
83 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
84# endif
85 if (pfd >= 0)
86 {
87 if (grantpt (pfd) == 0 /* change slave permissions */
88 && unlockpt (pfd) == 0)
89 { /* slave now unlocked */
90 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
91 return pfd;
92 }
78 93
79 rxvt_privileges(RESTORE); 94 close (pfd);
95 }
96
97 return -1;
98}
99#elif defined(HAVE_OPENPTY)
100static int
101get_pty (int *fd_tty, char **ttydev)
102{
103 int pfd;
104 int res;
105 char tty_name[32];
106
80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1) 108 if (res != -1)
84 { 109 {
85 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
86 return pfd; 111 return pfd;
87 } 112 }
88#endif
89 113
90#ifdef PTYS_ARE__GETPTY 114 return -1;
115}
116#elif defined(HAVE__GETPTY)
117static int
118get_pty (int *fd_tty, char **ttydev)
119{
120 int pfd;
121
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL) 123 if (*ttydev != NULL)
93 return pfd; 124 return pfd;
94#endif
95 125
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 126 return -1;
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
98 133
99 {
100# ifdef PTYS_ARE_GETPT
101 pfd = getpt();
102# else
103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR);
105# else
106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
107# endif
108# endif
109
110 if (pfd >= 0)
111 {
112 if (grantpt (pfd) == 0 /* change slave permissions */
113 && unlockpt (pfd) == 0)
114 { /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd;
117 }
118 close (pfd);
119 }
120 }
121# endif
122#endif
123
124#ifdef PTYS_ARE_PTC
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
126 { 135 {
127 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
128 return pfd; 137 return pfd;
129 } 138 }
130#endif
131 139
132#ifdef PTYS_ARE_CLONE 140 return -1;
141}
142#elif defined(HAVE_DEV_CLONE)
143static int
144get_pty (int *fd_tty, char **ttydev)
145{
146 int pfd;
147
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 148 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 149 {
135 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
136 return pfd; 151 return pfd;
137 } 152 }
138#endif
139 153
140#ifdef PTYS_ARE_NUMERIC 154 return -1;
141 { 155}
156#else
157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
158static int
159get_pty (int *fd_tty, char **ttydev)
160{
161 int pfd;
142 int idx; 162 int i;
143 char *c1, *c2; 163 char pty_name[32];
144 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
145 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
146 166 const char *minors = "0123456789abcdef";
147 c1 = &(pty_name[sizeof (pty_name) - 4]);
148 c2 = &(tty_name[sizeof (tty_name) - 4]);
149 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
150 { 168 {
151 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
152 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
153 if (access (tty_name, F_OK) < 0)
154 {
155 idx = 256;
156 break;
157 }
158
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
160 { 172 {
173 snprintf(pty_name, 32, "/dev/ptyp%d", i);
174 snprintf(tty_name, 32, "/dev/ttyp%d", i);
175 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
176 continue;
177 }
161 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
162 { 179 {
163 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
164 return pfd; 181 return pfd;
165 }
166
167 close (pfd);
168 } 182 }
183
184 close (pfd);
169 } 185 }
170 }
171#endif
172 186
173#ifdef PTYS_ARE_SEARCHED 187 return -1;
174 { 188}
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 189#endif
182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef"
184# endif
185
186 for (c1 = PTYCHAR1; *c1; c1++)
187 {
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
202 close (pfd);
203 }
204 }
205 }
206 }
207#endif
208
209 return -1;
210}
211 190
212/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
213/* 192/*
214 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
215 */ 194 */
… …
224 * Make our tty a controlling tty so that /dev/tty points to us 203 * Make our tty a controlling tty so that /dev/tty points to us
225 */ 204 */
226static int 205static int
227control_tty (int fd_tty) 206control_tty (int fd_tty)
228{ 207{
229 int fd;
230
231 /* ---------------------------------------- */
232 setsid (); 208 setsid ();
233 209
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 211 /*
237 * Push STREAMS modules: 212 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 223 * 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 224 * 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 225 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 226 * through - Geoff Wing
252 */ 227 */
253# ifdef HAVE_ISASTREAM 228# ifdef HAVE_ISASTREAM
254 if (isastream (fd_tty) == 1) 229 if (isastream (fd_tty) == 1)
255# endif 230# endif
256 { 231 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 235 }
261# endif 236#endif
262 /* ---------------------------------------- */ 237
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 239
265 fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 241 if (fd < 0)
267 return -1; /* fatal */ 242 return -1; /* fatal */
243
268 close (fd); 244 close (fd);
269 /* ---------------------------------------- */
270 245
271 return 0; 246 return 0;
272} 247}
273 248
274void 249void
275rxvt_ptytty::close_tty () 250ptytty::close_tty ()
276{ 251{
277 if (tty < 0) 252 if (tty < 0)
278 return; 253 return;
279 254
280 close (tty); 255 close (tty);
281 tty = -1; 256 tty = -1;
282} 257}
283 258
284bool 259bool
285rxvt_ptytty::make_controlling_tty () 260ptytty::make_controlling_tty ()
286{ 261{
287 return control_tty (tty) >= 0; 262 return control_tty (tty) >= 0;
288} 263}
289 264
290void 265void
291rxvt_ptytty::set_utf8_mode (bool on) 266ptytty::set_utf8_mode (bool on)
292{ 267{
293#ifdef IUTF8 268#ifdef IUTF8
294 if (pty < 0) 269 if (pty < 0)
295 return; 270 return;
296 271
… …
312 } 287 }
313 } 288 }
314#endif 289#endif
315} 290}
316 291
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 292static struct ttyconf {
321 gid_t gid; 293 gid_t gid;
322 mode_t mode; 294 mode_t mode;
323 295
324 ttyconf () 296 ttyconf ()
… …
333 } 305 }
334 else 306 else
335#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
336 { 308 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 310 gid = 0;
339 } 311 }
340 } 312 }
341} ttyconf; 313} ttyconf;
342 314
343///////////////////////////////////////////////////////////////////////////// 315ptytty_unix::ptytty_unix ()
316{
317 name = 0;
318#if UTMP_SUPPORT
319 cmd_pid = 0;
320#endif
321}
322
323ptytty_unix::~ptytty_unix ()
324{
325#if UTMP_SUPPORT
326 logout ();
327#endif
328 put ();
329}
344 330
345void 331void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 332ptytty_unix::put ()
347{ 333{
348 if (!name || !*name) 334 chmod (name, RESTORE_TTY_MODE);
349 return; 335 chown (name, 0, ttyconf.gid);
350 336
351 rxvt_privileges (RESTORE); 337 close_tty ();
352 338
353 if (action == SAVE) 339 if (pty >= 0)
354 { 340 close (pty);
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 }
370 else
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);
381# endif
382 341
383 } 342 free (name);
384 343
385 rxvt_privileges (IGNORE);
386}
387#endif
388
389rxvt_ptytty_unix::rxvt_ptytty_unix ()
390{
391 pty = tty = -1; 344 pty = tty = -1;
392 name = 0; 345 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} 346}
421 347
422bool 348bool
423rxvt_ptytty_unix::get () 349ptytty_unix::get ()
424{ 350{
425 /* get master (pty) */ 351 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
427 return false; 353 return false;
428 354
… …
430 356
431 /* get slave (tty) */ 357 /* get slave (tty) */
432 if (tty < 0) 358 if (tty < 0)
433 { 359 {
434#ifndef NO_SETOWNER_TTYDEV 360#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
436#endif 366#endif
437 367
438 if ((tty = get_tty (name)) < 0) 368 if ((tty = get_tty (name)) < 0)
439 { 369 {
440 put (); 370 put ();
… …
443 } 373 }
444 374
445 return true; 375 return true;
446} 376}
447 377
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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