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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.38 by root, Tue Jan 17 11:53:07 2006 UTC vs.
Revision 1.64 by ayin, Tue Jun 26 00:40:28 2007 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 61
59///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
60 63
61/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
63 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
64/* 67/*
65 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 71 */
72#if defined(UNIX98_PTY)
73
69static int 74 static int
70get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
71{ 76 {
72 int pfd; 77 int pfd;
73 78
74#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
75 char tty_name[sizeof "/dev/pts/????\0"];
76
77 rxvt_privileges(RESTORE);
78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1)
82 {
83 *ttydev = strdup (tty_name);
84 return pfd;
85 }
86#endif
87
88#ifdef PTYS_ARE__GETPTY
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL)
91 return pfd;
92#endif
93
94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
96
97 {
98# ifdef PTYS_ARE_GETPT
99 pfd = getpt(); 80 pfd = getpt();
100# else 81# elif defined(HAVE_POSIX_OPENPT)
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR);
103# else 83# else
104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
105# endif 85# endif
106# endif
107 86
108 if (pfd >= 0) 87 if (pfd >= 0)
109 { 88 {
110 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
111 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
112 { /* slave now unlocked */ 91 { /* slave now unlocked */
113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
114 return pfd; 93 return pfd;
115 } 94 }
95
116 close (pfd); 96 close (pfd);
117 } 97 }
118 }
119# endif
120#endif
121 98
122#ifdef PTYS_ARE_PTC 99 return -1;
123 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];
110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
124 { 114 {
125 *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)
126 return pfd; 132 return pfd;
133
134 return -1;
127 } 135 }
128#endif
129 136
130#ifdef PTYS_ARE_CLONE 137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
132 {
133 *ttydev = strdup (ptsname (pfd));
134 return pfd;
135 }
136#endif
137
138#ifdef PTYS_ARE_NUMERIC
139 {
140 int idx;
141 char *c1, *c2;
142 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???";
144
145 c1 = &(pty_name[sizeof (pty_name) - 4]);
146 c2 = &(tty_name[sizeof (tty_name) - 4]);
147 for (idx = 0; idx < 256; idx++)
148 { 145 {
149 sprintf (c1, "%d", idx); 146 *ttydev = strdup (ttyname (pfd));
150 sprintf (c2, "%d", idx); 147 return pfd;
151 if (access (tty_name, F_OK) < 0) 148 }
149
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
160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
162 *ttydev = strdup (ptsname (pfd));
163 return pfd;
164 }
165
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)
174 {
175 int pfd;
176 int i;
177 char pty_name[32];
178 char tty_name[32];
179 const char *majors = "pqrstuvwxyzabcde";
180 const char *minors = "0123456789abcdef";
181
182 for (i = 0; i < 256; i++)
183 {
184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
152 { 188 {
153 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
154 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
155 } 193 }
156 194
157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if (access (tty_name, R_OK | W_OK) == 0)
158 { 196 {
159 if (access (tty_name, R_OK | W_OK) == 0)
160 {
161 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
162 return pfd; 198 return pfd;
163 }
164
165 close (pfd);
166 } 199 }
200
201 close (pfd);
167 } 202 }
168 }
169#endif
170 203
171#ifdef PTYS_ARE_SEARCHED
172 {
173 const char *c1, *c2;
174 char pty_name[] = "/dev/pty??";
175 char tty_name[] = "/dev/tty??";
176
177# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz"
179# endif
180# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef"
182# endif
183
184 for (c1 = PTYCHAR1; *c1; c1++)
185 {
186 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
188 for (c2 = PTYCHAR2; *c2; c2++)
189 {
190 pty_name[ (sizeof (pty_name) - 2)] =
191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 {
194 if (access (tty_name, R_OK | W_OK) == 0)
195 {
196 *ttydev = strdup (tty_name);
197 return pfd;
198 }
199
200 close (pfd);
201 }
202 }
203 }
204 }
205#endif
206
207 return -1; 204 return -1;
208} 205 }
206
207#endif
209 208
210/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
211/* 210/*
212 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
213 */ 212 */
214static int 213static int
215get_tty (char *ttydev) 214get_tty (char *ttydev)
216{ 215{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 216 return open (ttydev, O_RDWR | O_NOCTTY, 0);
… …
222 * 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
223 */ 222 */
224static int 223static int
225control_tty (int fd_tty) 224control_tty (int fd_tty)
226{ 225{
227 int fd;
228
229 /* ---------------------------------------- */
230 setsid (); 226 setsid ();
231 227
232 /* ---------------------------------------- */
233# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
234 /* 229 /*
235 * Push STREAMS modules: 230 * Push STREAMS modules:
236 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
237 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
246 * documentation is really unclear about whether it is any close () on 241 * documentation is really unclear about whether it is any close () on
247 * 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
248 * 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
249 * through - Geoff Wing 244 * through - Geoff Wing
250 */ 245 */
251# ifdef HAVE_ISASTREAM 246# ifdef HAVE_ISASTREAM
252 if (isastream (fd_tty) == 1) 247 if (isastream (fd_tty) == 1)
253# endif 248# endif
254 { 249 {
255 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
256 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
257 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
258 } 253 }
259# endif 254#endif
260 /* ---------------------------------------- */ 255
256#ifdef TIOCSCTTY
261 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 257 ioctl (fd_tty, TIOCSCTTY, NULL);
262 /* ---------------------------------------- */ 258#else
259 fd = open (name, O_RDWR);
260 if (fd >= 0)
261 close (fd);
262#endif
263
263 fd = open ("/dev/tty", O_WRONLY); 264 int fd = open ("/dev/tty", O_WRONLY);
264 if (fd < 0) 265 if (fd < 0)
265 return -1; /* fatal */ 266 return -1; /* fatal */
267
266 close (fd); 268 close (fd);
267 /* ---------------------------------------- */
268 269
269 return 0; 270 return 0;
270} 271}
271 272
272void 273void
273rxvt_ptytty::close_tty () 274ptytty::close_tty ()
274{ 275{
275 if (tty < 0) 276 if (tty < 0)
276 return; 277 return;
277 278
278 close (tty); 279 close (tty);
279 tty = -1; 280 tty = -1;
280} 281}
281 282
282bool 283bool
283rxvt_ptytty::make_controlling_tty () 284ptytty::make_controlling_tty ()
284{ 285{
285 return control_tty (tty) >= 0; 286 return control_tty (tty) >= 0;
286} 287}
287 288
288void 289void
289rxvt_ptytty::set_utf8_mode (bool on) 290ptytty::set_utf8_mode (bool on)
290{ 291{
291#ifdef IUTF8 292#ifdef IUTF8
292 if (pty < 0) 293 if (pty < 0)
293 return; 294 return;
294 295
… …
310 } 311 }
311 } 312 }
312#endif 313#endif
313} 314}
314 315
315/////////////////////////////////////////////////////////////////////////////
316
317#ifndef NO_SETOWNER_TTYDEV
318static struct ttyconf { 316static struct ttyconf {
319 gid_t gid; 317 gid_t gid;
320 mode_t mode; 318 mode_t mode;
321 319
322 ttyconf () 320 ttyconf ()
… …
331 } 329 }
332 else 330 else
333#endif /* TTY_GID_SUPPORT */ 331#endif /* TTY_GID_SUPPORT */
334 { 332 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = getgid (); 334 gid = 0;
337 } 335 }
338 } 336 }
339} ttyconf; 337} ttyconf;
340 338
341///////////////////////////////////////////////////////////////////////////// 339ptytty_unix::ptytty_unix ()
340{
341 name = 0;
342#if UTMP_SUPPORT
343 cmd_pid = 0;
344#endif
345}
346
347ptytty_unix::~ptytty_unix ()
348{
349#if UTMP_SUPPORT
350 logout ();
351#endif
352 put ();
353}
342 354
343void 355void
344rxvt_ptytty_unix::privileges (rxvt_privaction action) 356ptytty_unix::put ()
345{ 357{
346 if (!name || !*name) 358 if (name)
347 return;
348
349 rxvt_privileges (RESTORE);
350
351 if (action == SAVE)
352 { 359 {
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS 360 chmod (name, RESTORE_TTY_MODE);
354 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
355 if (lstat (name, &savestat) < 0) /* you lose out */
356 ;
357 else
358# endif
359 {
360 saved = true;
361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode); 361 chown (name, 0, ttyconf.gid);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
366 }
367 } 362 }
368 else
369 { /* action == RESTORE */
370# ifndef RESET_TTY_TO_COMMON_DEFAULTS
371 if (saved)
372 {
373 chmod (name, savestat.st_mode);
374 chown (name, savestat.st_uid, savestat.st_gid);
375 }
376# else
377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
378 chown (name, 0, 0);
379# endif
380 363
381 } 364 close_tty ();
382 365
383 rxvt_privileges (IGNORE); 366 if (pty >= 0)
384} 367 close (pty);
385#endif
386 368
387rxvt_ptytty_unix::rxvt_ptytty_unix () 369 free (name);
388{ 370
389 pty = tty = -1; 371 pty = tty = -1;
390 name = 0; 372 name = 0;
391#ifndef NO_SETOWNER_TTYDEV
392 saved = false;
393#endif
394#if UTMP_SUPPORT
395 cmd_pid = 0;
396#endif
397}
398
399rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{
401 logout ();
402 put ();
403}
404
405void
406rxvt_ptytty_unix::put ()
407{
408#ifndef NO_SETOWNER_TTYDEV
409 privileges (RESTORE);
410#endif
411
412 if (pty >= 0) close (pty);
413 close_tty ();
414 free (name);
415
416 pty = tty = -1;
417 name = 0;
418} 373}
419 374
420bool 375bool
421rxvt_ptytty_unix::get () 376ptytty_unix::get ()
422{ 377{
423 /* get master (pty) */ 378 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0) 379 if ((pty = get_pty (&tty, &name)) < 0)
425 return false; 380 return false;
426 381
… …
428 383
429 /* get slave (tty) */ 384 /* get slave (tty) */
430 if (tty < 0) 385 if (tty < 0)
431 { 386 {
432#ifndef NO_SETOWNER_TTYDEV 387#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE); 388 chown (name, getuid (), ttyconf.gid); /* fail silently */
389 chmod (name, ttyconf.mode);
390# ifdef HAVE_REVOKE
391 revoke (name);
392# endif
434#endif 393#endif
435 394
436 if ((tty = get_tty (name)) < 0) 395 if ((tty = get_tty (name)) < 0)
437 { 396 {
438 put (); 397 put ();
… …
441 } 400 }
442 401
443 return true; 402 return true;
444} 403}
445 404
446/*----------------------- end-of-file (C source) -----------------------*/
447

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