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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 1.63 by root, Tue Oct 3 11:21:33 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>
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)
125 { /* slave now unlocked */ 91 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 93 return pfd;
128 } 94 }
95
129 close (pfd); 96 close (pfd);
130 } 97 }
131 }
132# endif
133#endif
134 98
135#ifdef PTYS_ARE_PTC 99 return -1;
136 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];
137 { 110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
114 {
138 *ttydev = 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)
139 return pfd; 132 return pfd;
133
134 return -1;
135 }
136
137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
146 *ttydev = strdup (ttyname (pfd));
147 return pfd;
140 } 148 }
141#endif
142 149
143#ifdef PTYS_ARE_CLONE 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
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 161 {
146 *ttydev = ptsname (pfd); 162 *ttydev = strdup (ptsname (pfd));
147 return pfd; 163 return pfd;
148 } 164 }
149#endif
150 165
151#ifdef PTYS_ARE_NUMERIC 166 return -1;
152 { 167 }
153 int idx;
154 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???";
157 168
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 169#else
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 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
160 for (idx = 0; idx < 256; idx++) 182 for (i = 0; i < 256; i++)
161 { 183 {
162 sprintf (c1, "%d", idx); 184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
163 sprintf (c2, "%d", idx); 185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
164 if (access (tty_name, F_OK) < 0) 186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 { 188 {
166 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
167 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
168 } 193 }
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 194
195 if (access (tty_name, R_OK | W_OK) == 0)
170 { 196 {
171 if (access (tty_name, R_OK | W_OK) == 0)
172 {
173 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
174 return pfd; 198 return pfd;
175 }
176 close (pfd);
177 } 199 }
178 }
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??";
186 200
187# ifndef PTYCHAR1 201 close (pfd);
188# define PTYCHAR1 "pqrstuvwxyz"
189# endif
190# ifndef PTYCHAR2
191# define PTYCHAR2 "0123456789abcdef"
192# endif
193
194 for (c1 = PTYCHAR1; *c1; c1++)
195 { 202 }
196 pty_name[ (sizeof (pty_name) - 3)] = 203
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; 204 return -1;
216} 205 }
206
207#endif
217 208
218/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
219/* 210/*
220 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
221 */ 212 */
222/* EXTPROTO */ 213static int
223int
224rxvt_get_tty (const char *ttydev) 214get_tty (char *ttydev)
225{ 215{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 216 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 217}
228 218
229/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
230/* 220/*
231 * 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
232 */ 222 */
233/* EXTPROTO */ 223static int
234int 224control_tty (int fd_tty)
235rxvt_control_tty (int fd_tty, const char *ttydev)
236{ 225{
237#ifndef __QNX__
238 int fd;
239
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 (); 226 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
252 227
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) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
268 /* 229 /*
269 * Push STREAMS modules: 230 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
271 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
284 */ 245 */
285# ifdef HAVE_ISASTREAM 246# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 247 if (isastream (fd_tty) == 1)
287# endif 248# endif
288 { 249 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 253 }
294#endif 254#endif
295 /* ---------------------------------------- */ 255
296# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 256 ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 257
299# elif defined(TIOCSETCTTY) 258 int fd = open ("/dev/tty", O_WRONLY);
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else
303 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 259 if (fd < 0)
260 return -1; /* fatal */
261
306 close (fd); 262 close (fd);
263
264 return 0;
265}
266
267void
268ptytty::close_tty ()
269{
270 if (tty < 0)
271 return;
272
273 close (tty);
274 tty = -1;
275}
276
277bool
278ptytty::make_controlling_tty ()
279{
280 return control_tty (tty) >= 0;
281}
282
283void
284ptytty::set_utf8_mode (bool on)
285{
286#ifdef IUTF8
287 if (pty < 0)
288 return;
289
290 struct termios tio;
291
292 if (tcgetattr (pty, &tio) != -1)
293 {
294 tcflag_t new_cflag = tio.c_iflag;
295
296 if (on)
297 new_cflag |= IUTF8;
298 else
299 new_cflag &= ~IUTF8;
300
301 if (new_cflag != tio.c_iflag)
302 {
303 tio.c_iflag = new_cflag;
304 tcsetattr (pty, TCSANOW, &tio);
305 }
306 }
307#endif
308}
309
310static struct ttyconf {
311 gid_t gid;
312 mode_t mode;
313
314 ttyconf ()
315 {
316#ifdef TTY_GID_SUPPORT
317 struct group *gr = getgrnam ("tty");
318
319 if (gr)
320 { /* change group ownership of tty to "tty" */
321 mode = S_IRUSR | S_IWUSR | S_IWGRP;
322 gid = gr->gr_gid;
323 }
324 else
325#endif /* TTY_GID_SUPPORT */
326 {
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
328 gid = 0;
329 }
330 }
331} ttyconf;
332
333ptytty_unix::ptytty_unix ()
334{
335 name = 0;
336#if UTMP_SUPPORT
337 cmd_pid = 0;
338#endif
339}
340
341ptytty_unix::~ptytty_unix ()
342{
343#if UTMP_SUPPORT
344 logout ();
345#endif
346 put ();
347}
348
349void
350ptytty_unix::put ()
351{
352 if (name)
353 {
354 chmod (name, RESTORE_TTY_MODE);
355 chown (name, 0, ttyconf.gid);
356 }
357
358 close_tty ();
359
360 if (pty >= 0)
361 close (pty);
362
363 free (name);
364
365 pty = tty = -1;
366 name = 0;
367}
368
369bool
370ptytty_unix::get ()
371{
372 /* get master (pty) */
373 if ((pty = get_pty (&tty, &name)) < 0)
374 return false;
375
376 fcntl (pty, F_SETFL, O_NONBLOCK);
377
378 /* get slave (tty) */
379 if (tty < 0)
380 {
381#ifndef NO_SETOWNER_TTYDEV
382 chown (name, getuid (), ttyconf.gid); /* fail silently */
383 chmod (name, ttyconf.mode);
384# ifdef HAVE_REVOKE
385 revoke (name);
307# endif 386# endif
308 /* ---------------------------------------- */ 387#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__ */
318 388
389 if ((tty = get_tty (name)) < 0)
390 {
391 put ();
392 return false;
393 }
394 }
395
319 return 0; 396 return true;
320} 397}
321/*----------------------- end-of-file (C source) -----------------------*/ 398

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