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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.16 by root, Sun Aug 15 03:30:04 2004 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 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#ifdef HAVE_STDLIB_H
28# include <cstdlib> 32#include <cstdlib>
29#endif 33#include <cstring>
30#ifdef HAVE_SYS_TYPES_H 34#include <csignal>
35
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#if defined(HAVE_STRING_H)
37# include <cstring>
38#endif
39#ifdef HAVE_FCNTL_H
40# include <fcntl.h> 38#include <fcntl.h>
41#endif 39
42#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
43# include <sys/ioctl.h> 41# include <sys/ioctl.h>
44#endif 42#endif
45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
46# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
47#endif 45#endif
48#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
49# include <stropts.h> 47# include <stropts.h>
50#endif 48#endif
51 49#if defined(HAVE_PTY_H)
52#if defined( __FreeBSD__) 50# include <pty.h>
53// better do this via configure, but.... 51#elif defined(HAVE_LIBUTIL_H)
54# include <libutil.h> 52# include <libutil.h>
53#elif defined(HAVE_UTIL_H)
54# include <util.h>
55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
55#endif 58#endif
56 59
57#include <cstdio> 60#include <cstdio>
58#include <grp.h> 61
62/////////////////////////////////////////////////////////////////////////////
59 63
60/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
63/* 67/*
64 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
65 * 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.
66 * 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
67 */ 71 */
72#if defined(UNIX98_PTY)
68static int 73static int
69get_pty (int *fd_tty, char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
70{ 75{
71 int pfd; 76 int pfd;
72 77
73#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
74 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 }
75 93
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
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
108 if (res != -1)
77 { 109 {
78 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
79 return pfd; 111 return pfd;
80 } 112 }
81#endif
82 113
83#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
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 123 if (*ttydev != NULL)
86 return pfd; 124 return pfd;
87#endif
88 125
89#ifdef PTYS_ARE_GETPTY 126 return -1;
127}
128#elif defined(HAVE_DEV_PTC)
129static int
130get_pty (int *fd_tty, char **ttydev)
131{
132 int pfd;
90 133
91 char *ptydev;
92
93 while ((ptydev = getpty ()) != NULL)
94 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
96 *ttydev = ptydev;
97 return pfd;
98 }
99#endif
100
101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
103
104 {
105# ifdef PTYS_ARE_GETPT
106 pfd = getpt ();
107# else
108 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
109# endif
110
111 if (pfd >= 0)
112 {
113 if (grantpt (pfd) == 0 /* change slave permissions */
114 && unlockpt (pfd) == 0)
115 { /* slave now unlocked */
116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
117 return pfd;
118 }
119 close (pfd);
120 }
121 }
122# endif
123#endif
124
125#ifdef PTYS_ARE_PTC
126 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
127 { 135 {
128 *ttydev = strdup (ttyname (pfd)); 136 *ttydev = strdup (ttyname (pfd));
129 return pfd; 137 return pfd;
130 } 138 }
131#endif
132 139
133#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
134 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)
135 { 149 {
136 *ttydev = strdup (ptsname (pfd)); 150 *ttydev = strdup (ptsname (pfd));
137 return pfd; 151 return pfd;
138 } 152 }
139#endif
140 153
141#ifdef PTYS_ARE_NUMERIC 154 return -1;
142 { 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;
143 int idx; 162 int i;
144 char *c1, *c2; 163 char pty_name[32];
145 char pty_name[] = "/dev/ptyp???"; 164 char tty_name[32];
146 char tty_name[] = "/dev/ttyp???"; 165 const char *majors = "pqrstuvwxyzabcde";
147 166 const char *minors = "0123456789abcdef";
148 c1 = &(pty_name[sizeof (pty_name) - 4]);
149 c2 = &(tty_name[sizeof (tty_name) - 4]);
150 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
151 { 168 {
152 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
153 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
154 if (access (tty_name, F_OK) < 0)
155 {
156 idx = 256;
157 break;
158 }
159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
161 { 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 }
162 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
163 { 179 {
164 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
165 return pfd; 181 return pfd;
166 }
167
168 close (pfd);
169 } 182 }
183
184 close (pfd);
170 } 185 }
171 }
172#endif
173 186
174#ifdef PTYS_ARE_SEARCHED 187 return -1;
175 { 188}
176 const char *c1, *c2;
177 char pty_name[] = "/dev/pty??";
178 char tty_name[] = "/dev/tty??";
179
180# ifndef PTYCHAR1
181# define PTYCHAR1 "pqrstuvwxyz"
182# endif 189#endif
183# ifndef PTYCHAR2
184# define PTYCHAR2 "0123456789abcdef"
185# endif
186
187 for (c1 = PTYCHAR1; *c1; c1++)
188 {
189 pty_name[ (sizeof (pty_name) - 3)] =
190 tty_name[ (sizeof (pty_name) - 3)] = *c1;
191 for (c2 = PTYCHAR2; *c2; c2++)
192 {
193 pty_name[ (sizeof (pty_name) - 2)] =
194 tty_name[ (sizeof (pty_name) - 2)] = *c2;
195 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
196 {
197 if (access (tty_name, R_OK | W_OK) == 0)
198 {
199 *ttydev = strdup (tty_name);
200 return pfd;
201 }
202
203 close (pfd);
204 }
205 }
206 }
207 }
208#endif
209
210 return -1;
211}
212 190
213/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
214/* 192/*
215 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
216 */ 194 */
… …
223/*----------------------------------------------------------------------*/ 201/*----------------------------------------------------------------------*/
224/* 202/*
225 * 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
226 */ 204 */
227static int 205static int
228control_tty (int fd_tty, const char *ttydev) 206control_tty (int fd_tty)
229{ 207{
230#ifndef __QNX__
231 int fd;
232
233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 208 setsid ();
236# endif
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 209
243 /* ---------------------------------------- */
244# ifdef TIOCNOTTY
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 if (fd >= 0)
247 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd);
250 }
251# endif
252
253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */
257
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
260 /* 211 /*
261 * Push STREAMS modules: 212 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
281 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 235 }
285#endif 236#endif
286 /* ---------------------------------------- */ 237
287# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
289# elif defined(TIOCSETCTTY) 239
290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
291# else
292 fd = open (ttydev, O_RDWR);
293 if (fd >= 0)
294 close (fd);
295# endif
296 /* ---------------------------------------- */
297 fd = open ("/dev/tty", O_WRONLY); 240 int fd = open ("/dev/tty", O_WRONLY);
298 if (fd < 0) 241 if (fd < 0)
299 return -1; /* fatal */ 242 return -1; /* fatal */
243
300 close (fd); 244 close (fd);
301 /* ---------------------------------------- */
302#endif /* ! __QNX__ */
303 245
304 return 0; 246 return 0;
305} 247}
306 248
307#ifndef NO_SETOWNER_TTYDEV 249void
250ptytty::close_tty ()
251{
252 if (tty < 0)
253 return;
254
255 close (tty);
256 tty = -1;
257}
258
259bool
260ptytty::make_controlling_tty ()
261{
262 return control_tty (tty) >= 0;
263}
264
265void
266ptytty::set_utf8_mode (bool on)
267{
268#ifdef IUTF8
269 if (pty < 0)
270 return;
271
272 struct termios tio;
273
274 if (tcgetattr (pty, &tio) != -1)
275 {
276 tcflag_t new_cflag = tio.c_iflag;
277
278 if (on)
279 new_cflag |= IUTF8;
280 else
281 new_cflag &= ~IUTF8;
282
283 if (new_cflag != tio.c_iflag)
284 {
285 tio.c_iflag = new_cflag;
286 tcsetattr (pty, TCSANOW, &tio);
287 }
288 }
289#endif
290}
291
308static struct ttyconf { 292static struct ttyconf {
309 gid_t gid; 293 gid_t gid;
310 mode_t mode; 294 mode_t mode;
311 295
312 ttyconf () 296 ttyconf ()
… …
321 } 305 }
322 else 306 else
323#endif /* TTY_GID_SUPPORT */ 307#endif /* TTY_GID_SUPPORT */
324 { 308 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid (); 310 gid = 0;
327 } 311 }
328 } 312 }
329} ttyconf; 313} ttyconf;
330 314
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}
330
331void 331void
332rxvt_ptytty::privileges (rxvt_privaction action) 332ptytty_unix::put ()
333{ 333{
334 rxvt_privileges (RESTORE); 334 chmod (name, RESTORE_TTY_MODE);
335 chown (name, 0, ttyconf.gid);
335 336
336 if (action == SAVE) 337 close_tty ();
337 {
338 //next_tty_action = RESTORE;
339# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341 if (lstat (name, &savestat) < 0) /* you lose out */
342 ;//next_tty_action = IGNORE;
343 else
344# endif
345 338
346 { 339 if (pty >= 0)
347 chown (name, getuid (), ttyconf.gid); /* fail silently */ 340 close (pty);
348 chmod (name, ttyconf.mode);
349# ifdef HAVE_REVOKE
350 revoke (name);
351# endif
352 341
353 } 342 free (name);
354 }
355 else
356 { /* action == RESTORE */
357 //next_tty_action = IGNORE;
358# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359 chmod (name, savestat.st_mode);
360 chown (name, savestat.st_uid, savestat.st_gid);
361# else
362 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
363 chown (name, 0, 0);
364# endif
365 343
366 }
367
368 rxvt_privileges (IGNORE);
369}
370#endif
371
372rxvt_ptytty::rxvt_ptytty ()
373{
374 pty = tty = -1; 344 pty = tty = -1;
375 name = 0; 345 name = 0;
376} 346}
377 347
378rxvt_ptytty::~rxvt_ptytty ()
379{
380 put ();
381}
382
383void
384
385rxvt_ptytty::close_tty ()
386{
387 if (tty >= 0) close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 if (tty >= 0)
396 privileges (RESTORE);
397#endif
398
399 if (pty >= 0) close (pty);
400 close_tty ();
401 free (name);
402
403 pty = tty = -1;
404 name = 0;
405}
406
407bool 348bool
408rxvt_ptytty::make_controlling_tty () 349ptytty_unix::get ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{ 350{
416 /* get master (pty) */ 351 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0) 352 if ((pty = get_pty (&tty, &name)) < 0)
418 return false; 353 return false;
419 354
… …
421 356
422 /* get slave (tty) */ 357 /* get slave (tty) */
423 if (tty < 0) 358 if (tty < 0)
424 { 359 {
425#ifndef NO_SETOWNER_TTYDEV 360#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE); 361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
427#endif 366#endif
428 367
429 if ((tty = get_tty (name)) < 0) 368 if ((tty = get_tty (name)) < 0)
430 { 369 {
431 put (); 370 put ();
… …
434 } 373 }
435 374
436 return true; 375 return true;
437} 376}
438 377
439/*----------------------- end-of-file (C source) -----------------------*/
440

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