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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC vs.
Revision 1.68 by ayin, Tue Dec 11 21:49:12 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>
10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
7 * 12 *
8 * 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
9 * 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
10 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 16 * (at your option) any later version.
… …
18 * 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
19 * along with this program; if not, write to the Free Software 24 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 26 *---------------------------------------------------------------------*/
22 27
23#include "../config.h" /* NECESSARY */ 28#include "../config.h"
24 29
25/* 30#include "ptytty.h"
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28 31
29#if 0
30#ifdef HAVE_GETPT
31# define _GNU_SOURCE
32#endif
33#endif
34
35#include <cstdio>
36#ifdef HAVE_STDLIB_H
37# include <cstdlib> 32#include <cstdlib>
38#endif 33#include <cstring>
39#ifdef HAVE_SYS_TYPES_H 34#include <csignal>
35
40# include <sys/types.h> 36#include <sys/types.h>
41#endif
42#ifdef HAVE_UNISTD_H
43# include <unistd.h> 37#include <unistd.h>
44#endif
45#if defined(HAVE_STRING_H)
46# include <cstring>
47#endif
48#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 38#include <fcntl.h>
50#endif 39
51#ifdef HAVE_SYS_IOCTL_H 40#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 41# include <sys/ioctl.h>
53#endif 42#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 43#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 44# include <sys/stropts.h> /* for I_PUSH */
56#endif 45#endif
57#ifdef HAVE_ISASTREAM 46#ifdef HAVE_ISASTREAM
58# include <stropts.h> 47# include <stropts.h>
59#endif 48#endif
60 49#if defined(HAVE_PTY_H)
61#ifdef DEBUG_TTY 50# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 51#elif defined(HAVE_LIBUTIL_H)
63#else 52# include <libutil.h>
64# define D_TTY(x) 53#elif defined(HAVE_UTIL_H)
54# include <util.h>
65#endif 55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
59
60#include <cstdio>
61
62/////////////////////////////////////////////////////////////////////////////
66 63
67/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
70/* 67/*
71 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
72 * 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.
73 * 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
74 */ 71 */
75/* EXTPROTO */ 72#if defined(UNIX98_PTY)
76int 73
74 static int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
78{ 76 {
79 int pfd; 77 int pfd;
80 78
81#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
82
83 char tty_name[sizeof "/dev/pts/????\0"];
84
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
86 {
87 *ttydev = strdup (tty_name);
88 return pfd;
89 }
90#endif
91
92#ifdef PTYS_ARE__GETPTY
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL)
95 return pfd;
96#endif
97
98#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev;
101
102 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
105 *ttydev = ptydev;
106 return pfd;
107 }
108#endif
109
110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
112
113 {
114# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
116# else 83# else
117
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
119# endif 85# endif
120 86
121 if (pfd >= 0) 87 if (pfd >= 0)
122 { 88 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
91 {
125 { /* slave now unlocked */ 92 /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 93 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 94 return pfd;
128 } 95 }
96
129 close (pfd); 97 close (pfd);
130 } 98 }
131 }
132# endif
133#endif
134 99
135#ifdef PTYS_ARE_PTC 100 return -1;
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 101 }
102
103#elif defined(HAVE_OPENPTY)
104
105 static int
106 get_pty (int *fd_tty, char **ttydev)
107 {
108 int pfd;
109 int res;
110
111 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
112
113 if (res != -1)
137 { 114 {
138 *ttydev = ttyname (pfd); 115 *ttydev = strdup (ttyname (*fd_tty));
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 char *slave;
129
130 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
131
132 if (slave != NULL) {
133 *ttydev = strdup (slave);
139 return pfd; 134 return pfd;
140 } 135 }
141#endif
142 136
143#ifdef PTYS_ARE_CLONE 137 return -1;
138 }
139
140#elif defined(HAVE_DEV_PTC)
141
142 static int
143 get_pty (int *fd_tty, char **ttydev)
144 {
145 int pfd;
146
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
146 *ttydev = ptsname (pfd);
147 return pfd;
148 }
149#endif
150
151#ifdef PTYS_ARE_NUMERIC
152 {
153 int idx;
154 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???";
157
158 c1 = & (pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++)
161 { 148 {
162 sprintf (c1, "%d", idx); 149 *ttydev = strdup (ttyname (pfd));
163 sprintf (c2, "%d", idx); 150 return pfd;
164 if (access (tty_name, F_OK) < 0) 151 }
152
153 return -1;
154 }
155
156#elif defined(HAVE_DEV_CLONE)
157
158 static int
159 get_pty (int *fd_tty, char **ttydev)
160 {
161 int pfd;
162
163 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
164 {
165 *ttydev = strdup (ptsname (pfd));
166 return pfd;
167 }
168
169 return -1;
170 }
171
172#else
173
174 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
175 static int
176 get_pty (int *fd_tty, char **ttydev)
177 {
178 int pfd;
179 int i;
180 char pty_name[32];
181 char tty_name[32];
182 const char *majors = "pqrstuvwxyzabcde";
183 const char *minors = "0123456789abcdef";
184
185 for (i = 0; i < 256; i++)
186 {
187 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
188 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
189
190 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 { 191 {
166 idx = 256; 192 snprintf(pty_name, 32, "/dev/ptyp%d", i);
167 break; 193 snprintf(tty_name, 32, "/dev/ttyp%d", i);
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
195 continue;
168 } 196 }
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 197
198 if (access (tty_name, R_OK | W_OK) == 0)
170 { 199 {
171 if (access (tty_name, R_OK | W_OK) == 0)
172 {
173 *ttydev = strdup (tty_name); 200 *ttydev = strdup (tty_name);
174 return pfd; 201 return pfd;
175 }
176 close (pfd);
177 } 202 }
203
204 close (pfd);
178 } 205 }
179 }
180#endif
181#ifdef PTYS_ARE_SEARCHED
182 {
183 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??";
186 206
187# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz"
189# endif
190# ifndef PTYCHAR2
191# define PTYCHAR2 "0123456789abcdef"
192# endif
193
194 for (c1 = PTYCHAR1; *c1; c1++)
195 {
196 pty_name[ (sizeof (pty_name) - 3)] =
197 tty_name[ (sizeof (pty_name) - 3)] = *c1;
198 for (c2 = PTYCHAR2; *c2; c2++)
199 {
200 pty_name[ (sizeof (pty_name) - 2)] =
201 tty_name[ (sizeof (pty_name) - 2)] = *c2;
202 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
203 {
204 if (access (tty_name, R_OK | W_OK) == 0)
205 {
206 *ttydev = strdup (tty_name);
207 return pfd;
208 }
209 close (pfd);
210 }
211 }
212 }
213 }
214#endif
215 return -1; 207 return -1;
216} 208 }
209
210#endif
217 211
218/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
219/* 213/*
220 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
221 */ 215 */
222/* EXTPROTO */ 216static int
223int
224rxvt_get_tty (const char *ttydev) 217get_tty (char *ttydev)
225{ 218{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 220}
228 221
229/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
230/* 223/*
231 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 225 */
233/* EXTPROTO */ 226static int
234int 227control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 228{
237#ifndef __QNX__
238 int fd; 229 int fd;
239 230
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */
242# ifdef HAVE_SETSID
243 setsid (); 231 setsid ();
244# endif
245# if defined(HAVE_SETPGID)
246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0);
249# endif
250 /* ---------------------------------------- */
251# ifdef TIOCNOTTY
252 232
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
255 if (fd >= 0)
256 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd);
259 }
260# endif
261 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
264 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */
266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
268 /* 234 /*
269 * Push STREAMS modules: 235 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
284 */ 250 */
285# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
287# endif 253# endif
288 { 254 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 258 }
294#endif 259#endif
295 /* ---------------------------------------- */ 260
296# if defined(TIOCSCTTY) 261#ifdef TIOCSCTTY
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 262 ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else 263#else
303 fd = open (ttydev, O_RDWR); 264 fd = open (ttyname (fd_tty), O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 265 if (fd >= 0)
306 close (fd); 266 close (fd);
267#endif
268
269 fd = open ("/dev/tty", O_WRONLY);
270 if (fd < 0)
271 return -1; /* fatal */
272
273 close (fd);
274
275 return 0;
276}
277
278void
279ptytty::close_tty ()
280{
281 if (tty < 0)
282 return;
283
284 close (tty);
285 tty = -1;
286}
287
288bool
289ptytty::make_controlling_tty ()
290{
291 return control_tty (tty) >= 0;
292}
293
294void
295ptytty::set_utf8_mode (bool on)
296{
297#ifdef IUTF8
298 if (pty < 0)
299 return;
300
301 struct termios tio;
302
303 if (tcgetattr (pty, &tio) != -1)
304 {
305 tcflag_t new_cflag = tio.c_iflag;
306
307 if (on)
308 new_cflag |= IUTF8;
309 else
310 new_cflag &= ~IUTF8;
311
312 if (new_cflag != tio.c_iflag)
313 {
314 tio.c_iflag = new_cflag;
315 tcsetattr (pty, TCSANOW, &tio);
316 }
317 }
318#endif
319}
320
321static struct ttyconf {
322 gid_t gid;
323 mode_t mode;
324
325 ttyconf ()
326 {
327#ifdef TTY_GID_SUPPORT
328 struct group *gr = getgrnam ("tty");
329
330 if (gr)
331 {
332 /* change group ownership of tty to "tty" */
333 mode = S_IRUSR | S_IWUSR | S_IWGRP;
334 gid = gr->gr_gid;
335 }
336 else
337#endif /* TTY_GID_SUPPORT */
338 {
339 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
340 gid = 0;
341 }
342 }
343} ttyconf;
344
345ptytty_unix::ptytty_unix ()
346{
347 name = 0;
348#if UTMP_SUPPORT
349 cmd_pid = 0;
350#endif
351}
352
353ptytty_unix::~ptytty_unix ()
354{
355#if UTMP_SUPPORT
356 logout ();
357#endif
358 put ();
359}
360
361void
362ptytty_unix::put ()
363{
364 if (name)
365 {
366 chmod (name, RESTORE_TTY_MODE);
367 chown (name, 0, ttyconf.gid);
368 }
369
370 close_tty ();
371
372 if (pty >= 0)
373 close (pty);
374
375 free (name);
376
377 pty = tty = -1;
378 name = 0;
379}
380
381bool
382ptytty_unix::get ()
383{
384 /* get master (pty) */
385 if ((pty = get_pty (&tty, &name)) < 0)
386 return false;
387
388 fcntl (pty, F_SETFL, O_NONBLOCK);
389
390 /* get slave (tty) */
391 if (tty < 0)
392 {
393#ifndef NO_SETOWNER_TTYDEV
394 chown (name, getuid (), ttyconf.gid); /* fail silently */
395 chmod (name, ttyconf.mode);
396# ifdef HAVE_REVOKE
397 revoke (name);
307# endif 398# endif
308 /* ---------------------------------------- */ 399#endif
309 fd = open ("/dev/tty", O_WRONLY);
310 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
311 if (fd < 0)
312 return -1; /* fatal */
313 close (fd);
314 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */
318 400
401 if ((tty = get_tty (name)) < 0)
402 {
403 put ();
404 return false;
405 }
406 }
407
319 return 0; 408 return true;
320} 409}
321/*----------------------- end-of-file (C source) -----------------------*/ 410

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