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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.11 by pcg, Thu Apr 8 20:31:45 2004 UTC vs.
Revision 1.66 by ayin, Thu Jun 28 17:47:14 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 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"
25 29
26/* 30#include "ptytty.h"
27 * Try to be self-contained except for the above autoconfig'd defines
28 */
29 31
30#if 0
31#ifdef HAVE_GETPT
32# define _GNU_SOURCE
33#endif
34#endif
35
36#include <cstdio>
37#ifdef HAVE_STDLIB_H
38# include <cstdlib> 32#include <cstdlib>
39#endif 33#include <cstring>
40#ifdef HAVE_SYS_TYPES_H 34#include <csignal>
35
41# include <sys/types.h> 36#include <sys/types.h>
42#endif
43#ifdef HAVE_UNISTD_H
44# include <unistd.h> 37#include <unistd.h>
45#endif
46#if defined(HAVE_STRING_H)
47# include <cstring>
48#endif
49#ifdef HAVE_FCNTL_H
50# include <fcntl.h> 38#include <fcntl.h>
51#endif 39
52#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
53# include <sys/ioctl.h> 41# include <sys/ioctl.h>
54#endif 42#endif
55#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
56# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
57#endif 45#endif
58#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
59# include <stropts.h> 47# include <stropts.h>
60#endif 48#endif
61 49#if defined(HAVE_PTY_H)
62#ifdef DEBUG_TTY 50# include <pty.h>
63# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 51#elif defined(HAVE_LIBUTIL_H)
64#else 52# include <libutil.h>
65# define D_TTY(x) 53#elif defined(HAVE_UTIL_H)
54# include <util.h>
66#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
59
60#include <cstdio>
61
62/////////////////////////////////////////////////////////////////////////////
67 63
68/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
69 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
70 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
71/* 67/*
72 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
73 * 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.
74 * 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
75 */ 71 */
76/* EXTPROTO */ 72#if defined(UNIX98_PTY)
77int 73
74 static int
78rxvt_get_pty (int *fd_tty, const char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
79{ 76 {
80 int pfd; 77 int pfd;
81 78
82#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
83
84 char tty_name[sizeof "/dev/pts/????\0"];
85
86 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
87 {
88 *ttydev = strdup (tty_name);
89 return pfd;
90 }
91#endif
92
93#ifdef PTYS_ARE__GETPTY
94 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
95 if (*ttydev != NULL)
96 return pfd;
97#endif
98
99#ifdef PTYS_ARE_GETPTY
100
101 char *ptydev;
102
103 while ((ptydev = getpty ()) != NULL)
104 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
105 {
106 *ttydev = ptydev;
107 return pfd;
108 }
109#endif
110
111#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
112# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
113
114 {
115# ifdef PTYS_ARE_GETPT
116 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
117# else 83# else
118
119 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
120# endif 85# endif
121 86
122 if (pfd >= 0) 87 if (pfd >= 0)
123 { 88 {
124 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
125 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
126 { /* slave now unlocked */ 91 { /* slave now unlocked */
127 *ttydev = ptsname (pfd); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
128 return pfd; 93 return pfd;
129 } 94 }
95
130 close (pfd); 96 close (pfd);
131 } 97 }
132 }
133# endif
134#endif
135 98
136#ifdef PTYS_ARE_PTC 99 return -1;
137 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
110 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
111
112 if (res != -1)
138 { 113 {
139 *ttydev = ttyname (pfd); 114 *ttydev = strdup (ttyname (*fd_tty));
115 return pfd;
116 }
117
118 return -1;
119 }
120
121#elif defined(HAVE__GETPTY)
122
123 static int
124 get_pty (int *fd_tty, char **ttydev)
125 {
126 int pfd;
127 char *slave;
128
129 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
130
131 if (slave != NULL) {
132 *ttydev = strdup (slave);
140 return pfd; 133 return pfd;
141 } 134 }
142#endif
143 135
144#ifdef PTYS_ARE_CLONE 136 return -1;
137 }
138
139#elif defined(HAVE_DEV_PTC)
140
141 static int
142 get_pty (int *fd_tty, char **ttydev)
143 {
144 int pfd;
145
145 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 146 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
146 {
147 *ttydev = ptsname (pfd);
148 return pfd;
149 }
150#endif
151
152#ifdef PTYS_ARE_NUMERIC
153 {
154 int idx;
155 char *c1, *c2;
156 char pty_name[] = "/dev/ptyp???";
157 char tty_name[] = "/dev/ttyp???";
158
159 c1 = & (pty_name[sizeof (pty_name) - 4]);
160 c2 = & (tty_name[sizeof (tty_name) - 4]);
161 for (idx = 0; idx < 256; idx++)
162 { 147 {
163 sprintf (c1, "%d", idx); 148 *ttydev = strdup (ttyname (pfd));
164 sprintf (c2, "%d", idx); 149 return pfd;
165 if (access (tty_name, F_OK) < 0) 150 }
151
152 return -1;
153 }
154
155#elif defined(HAVE_DEV_CLONE)
156
157 static int
158 get_pty (int *fd_tty, char **ttydev)
159 {
160 int pfd;
161
162 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
163 {
164 *ttydev = strdup (ptsname (pfd));
165 return pfd;
166 }
167
168 return -1;
169 }
170
171#else
172
173 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
174 static int
175 get_pty (int *fd_tty, char **ttydev)
176 {
177 int pfd;
178 int i;
179 char pty_name[32];
180 char tty_name[32];
181 const char *majors = "pqrstuvwxyzabcde";
182 const char *minors = "0123456789abcdef";
183
184 for (i = 0; i < 256; i++)
185 {
186 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
187 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
188
189 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
166 { 190 {
167 idx = 256; 191 snprintf(pty_name, 32, "/dev/ptyp%d", i);
168 break; 192 snprintf(tty_name, 32, "/dev/ttyp%d", i);
193 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
194 continue;
169 } 195 }
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 196
197 if (access (tty_name, R_OK | W_OK) == 0)
171 { 198 {
172 if (access (tty_name, R_OK | W_OK) == 0)
173 {
174 *ttydev = strdup (tty_name); 199 *ttydev = strdup (tty_name);
175 return pfd; 200 return pfd;
176 }
177 close (pfd);
178 } 201 }
202
203 close (pfd);
179 } 204 }
180 }
181#endif
182#ifdef PTYS_ARE_SEARCHED
183 {
184 const char *c1, *c2;
185 char pty_name[] = "/dev/pty??";
186 char tty_name[] = "/dev/tty??";
187 205
188# ifndef PTYCHAR1
189# define PTYCHAR1 "pqrstuvwxyz"
190# endif
191# ifndef PTYCHAR2
192# define PTYCHAR2 "0123456789abcdef"
193# endif
194
195 for (c1 = PTYCHAR1; *c1; c1++)
196 {
197 pty_name[ (sizeof (pty_name) - 3)] =
198 tty_name[ (sizeof (pty_name) - 3)] = *c1;
199 for (c2 = PTYCHAR2; *c2; c2++)
200 {
201 pty_name[ (sizeof (pty_name) - 2)] =
202 tty_name[ (sizeof (pty_name) - 2)] = *c2;
203 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
204 {
205 if (access (tty_name, R_OK | W_OK) == 0)
206 {
207 *ttydev = strdup (tty_name);
208 return pfd;
209 }
210 close (pfd);
211 }
212 }
213 }
214 }
215#endif
216 return -1; 206 return -1;
217} 207 }
208
209#endif
218 210
219/*----------------------------------------------------------------------*/ 211/*----------------------------------------------------------------------*/
220/* 212/*
221 * Returns tty file descriptor, or -1 on failure 213 * Returns tty file descriptor, or -1 on failure
222 */ 214 */
223/* EXTPROTO */ 215static int
224int
225rxvt_get_tty (const char *ttydev) 216get_tty (char *ttydev)
226{ 217{
227 return open (ttydev, O_RDWR | O_NOCTTY, 0); 218 return open (ttydev, O_RDWR | O_NOCTTY, 0);
228} 219}
229 220
230/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
231/* 222/*
232 * Make our tty a controlling tty so that /dev/tty points to us 223 * Make our tty a controlling tty so that /dev/tty points to us
233 */ 224 */
234/* EXTPROTO */ 225static int
235int 226control_tty (int fd_tty)
236rxvt_control_tty (int fd_tty, const char *ttydev)
237{ 227{
238#ifndef __QNX__
239 int fd; 228 int fd;
240 229
241 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
242 /* ---------------------------------------- */
243# ifdef HAVE_SETSID
244 setsid (); 230 setsid ();
245# endif
246# if defined(HAVE_SETPGID)
247 setpgid (0, 0);
248# elif defined(HAVE_SETPGRP)
249 setpgrp (0, 0);
250# endif
251 /* ---------------------------------------- */
252# ifdef TIOCNOTTY
253 231
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
256 if (fd >= 0)
257 {
258 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
259 close (fd);
260 }
261# endif
262 /* ---------------------------------------- */
263 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
264 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
265 if (fd >= 0)
266 close (fd); /* ouch: still have controlling tty */
267 /* ---------------------------------------- */
268#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 232#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
269 /* 233 /*
270 * Push STREAMS modules: 234 * Push STREAMS modules:
271 * ptem: pseudo-terminal hardware emulation module. 235 * ptem: pseudo-terminal hardware emulation module.
272 * ldterm: standard terminal line discipline. 236 * ldterm: standard terminal line discipline.
273 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 237 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
285 */ 249 */
286# ifdef HAVE_ISASTREAM 250# ifdef HAVE_ISASTREAM
287 if (isastream (fd_tty) == 1) 251 if (isastream (fd_tty) == 1)
288# endif 252# endif
289 { 253 {
290 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
291 ioctl (fd_tty, I_PUSH, "ptem"); 254 ioctl (fd_tty, I_PUSH, "ptem");
292 ioctl (fd_tty, I_PUSH, "ldterm"); 255 ioctl (fd_tty, I_PUSH, "ldterm");
293 ioctl (fd_tty, I_PUSH, "ttcompat"); 256 ioctl (fd_tty, I_PUSH, "ttcompat");
294 } 257 }
295#endif 258#endif
296 /* ---------------------------------------- */ 259
297# if defined(TIOCSCTTY) 260#ifdef TIOCSCTTY
298 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 261 ioctl (fd_tty, TIOCSCTTY, NULL);
299 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
300# elif defined(TIOCSETCTTY)
301 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
302 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
303# else 262#else
304 fd = open (ttydev, O_RDWR); 263 fd = open (ttyname (fd_tty), O_RDWR);
305 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
306 if (fd >= 0) 264 if (fd >= 0)
307 close (fd); 265 close (fd);
266#endif
267
268 fd = open ("/dev/tty", O_WRONLY);
269 if (fd < 0)
270 return -1; /* fatal */
271
272 close (fd);
273
274 return 0;
275}
276
277void
278ptytty::close_tty ()
279{
280 if (tty < 0)
281 return;
282
283 close (tty);
284 tty = -1;
285}
286
287bool
288ptytty::make_controlling_tty ()
289{
290 return control_tty (tty) >= 0;
291}
292
293void
294ptytty::set_utf8_mode (bool on)
295{
296#ifdef IUTF8
297 if (pty < 0)
298 return;
299
300 struct termios tio;
301
302 if (tcgetattr (pty, &tio) != -1)
303 {
304 tcflag_t new_cflag = tio.c_iflag;
305
306 if (on)
307 new_cflag |= IUTF8;
308 else
309 new_cflag &= ~IUTF8;
310
311 if (new_cflag != tio.c_iflag)
312 {
313 tio.c_iflag = new_cflag;
314 tcsetattr (pty, TCSANOW, &tio);
315 }
316 }
317#endif
318}
319
320static struct ttyconf {
321 gid_t gid;
322 mode_t mode;
323
324 ttyconf ()
325 {
326#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty");
328
329 if (gr)
330 { /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid;
333 }
334 else
335#endif /* TTY_GID_SUPPORT */
336 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = 0;
339 }
340 }
341} ttyconf;
342
343ptytty_unix::ptytty_unix ()
344{
345 name = 0;
346#if UTMP_SUPPORT
347 cmd_pid = 0;
348#endif
349}
350
351ptytty_unix::~ptytty_unix ()
352{
353#if UTMP_SUPPORT
354 logout ();
355#endif
356 put ();
357}
358
359void
360ptytty_unix::put ()
361{
362 if (name)
363 {
364 chmod (name, RESTORE_TTY_MODE);
365 chown (name, 0, ttyconf.gid);
366 }
367
368 close_tty ();
369
370 if (pty >= 0)
371 close (pty);
372
373 free (name);
374
375 pty = tty = -1;
376 name = 0;
377}
378
379bool
380ptytty_unix::get ()
381{
382 /* get master (pty) */
383 if ((pty = get_pty (&tty, &name)) < 0)
384 return false;
385
386 fcntl (pty, F_SETFL, O_NONBLOCK);
387
388 /* get slave (tty) */
389 if (tty < 0)
390 {
391#ifndef NO_SETOWNER_TTYDEV
392 chown (name, getuid (), ttyconf.gid); /* fail silently */
393 chmod (name, ttyconf.mode);
394# ifdef HAVE_REVOKE
395 revoke (name);
308# endif 396# endif
309 /* ---------------------------------------- */ 397#endif
310 fd = open ("/dev/tty", O_WRONLY);
311 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
312 if (fd < 0)
313 return -1; /* fatal */
314 close (fd);
315 /* ---------------------------------------- */
316 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
317 /* ---------------------------------------- */
318#endif /* ! __QNX__ */
319 398
399 if ((tty = get_tty (name)) < 0)
400 {
401 put ();
402 return false;
403 }
404 }
405
320 return 0; 406 return true;
321} 407}
322/*----------------------- end-of-file (C source) -----------------------*/ 408

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