ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.12 by root, Fri Aug 13 03:36:57 2004 UTC vs.
Revision 1.69 by root, Mon May 5 16:51:52 2008 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 37#include <sys/stat.h>
43#ifdef HAVE_UNISTD_H
44# include <unistd.h> 38#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> 39#include <fcntl.h>
51#endif 40
52#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
53# include <sys/ioctl.h> 42# include <sys/ioctl.h>
54#endif 43#endif
55#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
56# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
57#endif 46#endif
58#ifdef HAVE_ISASTREAM 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
59# include <stropts.h> 48# include <stropts.h>
60#endif 49#endif
61 50#if defined(HAVE_PTY_H)
62#ifdef DEBUG_TTY 51# include <pty.h>
63# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 52#elif defined(HAVE_LIBUTIL_H)
64#else 53# include <libutil.h>
65# define D_TTY(x) 54#elif defined(HAVE_UTIL_H)
55# include <util.h>
66#endif 56#endif
57#ifdef TTY_GID_SUPPORT
58#include <grp.h>
59#endif
60
61#include <cstdio>
62
63/////////////////////////////////////////////////////////////////////////////
67 64
68/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
69 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
70 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
71/* 68/*
72 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
73 * If successful, ttydev is set to the name of the slave device. 70 * 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 71 * fd_tty _may_ also be set to an open fd to the slave device
75 */ 72 */
76/* EXTPROTO */ 73#if defined(UNIX98_PTY)
77int 74
75 static int
78rxvt_get_pty (int *fd_tty, const char **ttydev) 76 get_pty (int *fd_tty, char **ttydev)
79{ 77 {
80 int pfd; 78 int pfd;
81 79
82#ifdef PTYS_ARE_OPENPTY 80# 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 (); 81 pfd = getpt();
82# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR);
117# else 84# else
118
119 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
120# endif 86# endif
121 87
122 if (pfd >= 0) 88 if (pfd >= 0)
123 { 89 {
124 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
125 && unlockpt (pfd) == 0) 91 && unlockpt (pfd) == 0)
92 {
126 { /* slave now unlocked */ 93 /* slave now unlocked */
127 *ttydev = ptsname (pfd); /* get slave's name */ 94 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
128 return pfd; 95 return pfd;
129 } 96 }
97
130 close (pfd); 98 close (pfd);
131 } 99 }
132 }
133# endif
134#endif
135 100
136#ifdef PTYS_ARE_PTC 101 return -1;
102 }
103
104#elif defined(HAVE_OPENPTY)
105
106 static int
107 get_pty (int *fd_tty, char **ttydev)
108 {
109 int pfd;
110 int res;
111
112 res = openpty (&pfd, fd_tty, NULL, NULL, NULL);
113
114 if (res != -1)
115 {
116 *ttydev = strdup (ttyname (*fd_tty));
117 return pfd;
118 }
119
120 return -1;
121 }
122
123#elif defined(HAVE__GETPTY)
124
125 static int
126 get_pty (int *fd_tty, char **ttydev)
127 {
128 int pfd;
129 char *slave;
130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
132
133 if (slave != NULL)
134 {
135 *ttydev = strdup (slave);
136 return pfd;
137 }
138
139 return -1;
140 }
141
142#elif defined(HAVE_DEV_PTC)
143
144 static int
145 get_pty (int *fd_tty, char **ttydev)
146 {
147 int pfd;
148
137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 149 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
138 { 150 {
139 *ttydev = ttyname (pfd); 151 *ttydev = strdup (ttyname (pfd));
140 return pfd; 152 return pfd;
141 } 153 }
142#endif
143 154
144#ifdef PTYS_ARE_CLONE 155 return -1;
156 }
157
158#elif defined(HAVE_DEV_CLONE)
159
160 static int
161 get_pty (int *fd_tty, char **ttydev)
162 {
163 int pfd;
164
145 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 165 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
146 { 166 {
147 *ttydev = ptsname (pfd); 167 *ttydev = strdup (ptsname (pfd));
148 return pfd; 168 return pfd;
149 } 169 }
150#endif
151 170
152#ifdef PTYS_ARE_NUMERIC 171 return -1;
153 { 172 }
154 int idx;
155 char *c1, *c2;
156 char pty_name[] = "/dev/ptyp???";
157 char tty_name[] = "/dev/ttyp???";
158 173
159 c1 = & (pty_name[sizeof (pty_name) - 4]); 174#else
160 c2 = & (tty_name[sizeof (tty_name) - 4]); 175
176 /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
177 static int
178 get_pty (int *fd_tty, char **ttydev)
179 {
180 int pfd;
181 int i;
182 char pty_name[32];
183 char tty_name[32];
184 const char *majors = "pqrstuvwxyzabcde";
185 const char *minors = "0123456789abcdef";
186
161 for (idx = 0; idx < 256; idx++) 187 for (i = 0; i < 256; i++)
162 { 188 {
163 sprintf (c1, "%d", idx); 189 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
164 sprintf (c2, "%d", idx); 190 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
165 if (access (tty_name, F_OK) < 0) 191
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
166 { 193 {
167 idx = 256; 194 snprintf(pty_name, 32, "/dev/ptyp%d", i);
168 break; 195 snprintf(tty_name, 32, "/dev/ttyp%d", i);
196 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
197 continue;
169 } 198 }
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 199
200 if (access (tty_name, R_OK | W_OK) == 0)
171 { 201 {
172 if (access (tty_name, R_OK | W_OK) == 0)
173 {
174 *ttydev = strdup (tty_name); 202 *ttydev = strdup (tty_name);
175 return pfd; 203 return pfd;
176 }
177 close (pfd);
178 } 204 }
179 }
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 206 close (pfd);
189# define PTYCHAR1 "pqrstuvwxyz"
190# endif
191# ifndef PTYCHAR2
192# define PTYCHAR2 "0123456789abcdef"
193# endif
194
195 for (c1 = PTYCHAR1; *c1; c1++)
196 { 207 }
197 pty_name[ (sizeof (pty_name) - 3)] = 208
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; 209 return -1;
217} 210 }
211
212#endif
218 213
219/*----------------------------------------------------------------------*/ 214/*----------------------------------------------------------------------*/
220/* 215/*
221 * Returns tty file descriptor, or -1 on failure 216 * Returns tty file descriptor, or -1 on failure
222 */ 217 */
223/* EXTPROTO */ 218static int
224int
225rxvt_get_tty (const char *ttydev) 219get_tty (char *ttydev)
226{ 220{
227 return open (ttydev, O_RDWR | O_NOCTTY, 0); 221 return open (ttydev, O_RDWR | O_NOCTTY, 0);
228} 222}
229 223
230/*----------------------------------------------------------------------*/ 224/*----------------------------------------------------------------------*/
231/* 225/*
232 * Make our tty a controlling tty so that /dev/tty points to us 226 * Make our tty a controlling tty so that /dev/tty points to us
233 */ 227 */
234/* EXTPROTO */ 228static int
235int 229control_tty (int fd_tty)
236rxvt_control_tty (int fd_tty, const char *ttydev)
237{ 230{
238#ifndef __QNX__
239 int fd; 231 int fd;
240 232
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 (); 233 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
253 234
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) 235#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
269 /* 236 /*
270 * Push STREAMS modules: 237 * Push STREAMS modules:
271 * ptem: pseudo-terminal hardware emulation module. 238 * ptem: pseudo-terminal hardware emulation module.
272 * ldterm: standard terminal line discipline. 239 * ldterm: standard terminal line discipline.
273 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
281 * documentation is really unclear about whether it is any close () on 248 * documentation is really unclear about whether it is any close () on
282 * the master side or the last close () - i.e. a proper STREAMS dismantling 249 * the master side or the last close () - i.e. a proper STREAMS dismantling
283 * close () - on the master side which causes a hang up to be sent 250 * close () - on the master side which causes a hang up to be sent
284 * through - Geoff Wing 251 * through - Geoff Wing
285 */ 252 */
286# ifdef HAVE_ISASTREAM 253#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
287 if (isastream (fd_tty) == 1) 254 if (isastream (fd_tty) == 1)
288# endif 255# endif
289 { 256 {
290 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
291 ioctl (fd_tty, I_PUSH, "ptem"); 257 ioctl (fd_tty, I_PUSH, "ptem");
292 ioctl (fd_tty, I_PUSH, "ldterm"); 258 ioctl (fd_tty, I_PUSH, "ldterm");
293 ioctl (fd_tty, I_PUSH, "ttcompat"); 259 ioctl (fd_tty, I_PUSH, "ttcompat");
294 } 260 }
295#endif 261#endif
296 /* ---------------------------------------- */ 262
297# if defined(TIOCSCTTY) 263#ifdef TIOCSCTTY
298 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 264 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 265#else
304 fd = open (ttydev, O_RDWR); 266 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) 267 if (fd >= 0)
307 close (fd); 268 close (fd);
269#endif
270
271 fd = open ("/dev/tty", O_WRONLY);
272 if (fd < 0)
273 return -1; /* fatal */
274
275 close (fd);
276
277 return 0;
278}
279
280void
281ptytty::close_tty ()
282{
283 if (tty < 0)
284 return;
285
286 close (tty);
287 tty = -1;
288}
289
290bool
291ptytty::make_controlling_tty ()
292{
293 return control_tty (tty) >= 0;
294}
295
296void
297ptytty::set_utf8_mode (bool on)
298{
299#ifdef IUTF8
300 if (pty < 0)
301 return;
302
303 struct termios tio;
304
305 if (tcgetattr (pty, &tio) != -1)
306 {
307 tcflag_t new_cflag = tio.c_iflag;
308
309 if (on)
310 new_cflag |= IUTF8;
311 else
312 new_cflag &= ~IUTF8;
313
314 if (new_cflag != tio.c_iflag)
315 {
316 tio.c_iflag = new_cflag;
317 tcsetattr (pty, TCSANOW, &tio);
318 }
319 }
320#endif
321}
322
323static struct ttyconf {
324 gid_t gid;
325 mode_t mode;
326
327 ttyconf ()
328 {
329#ifdef TTY_GID_SUPPORT
330 struct group *gr = getgrnam ("tty");
331
332 if (gr)
333 {
334 /* change group ownership of tty to "tty" */
335 mode = S_IRUSR | S_IWUSR | S_IWGRP;
336 gid = gr->gr_gid;
337 }
338 else
339#endif /* TTY_GID_SUPPORT */
340 {
341 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
342 gid = 0;
343 }
344 }
345} ttyconf;
346
347ptytty_unix::ptytty_unix ()
348{
349 name = 0;
350#if UTMP_SUPPORT
351 cmd_pid = 0;
352#endif
353}
354
355ptytty_unix::~ptytty_unix ()
356{
357#if UTMP_SUPPORT
358 logout ();
359#endif
360 put ();
361}
362
363void
364ptytty_unix::put ()
365{
366 if (name)
367 {
368 chmod (name, RESTORE_TTY_MODE);
369 chown (name, 0, ttyconf.gid);
370 }
371
372 close_tty ();
373
374 if (pty >= 0)
375 close (pty);
376
377 free (name);
378
379 pty = tty = -1;
380 name = 0;
381}
382
383bool
384ptytty_unix::get ()
385{
386 /* get master (pty) */
387 if ((pty = get_pty (&tty, &name)) < 0)
388 return false;
389
390 fcntl (pty, F_SETFL, O_NONBLOCK);
391
392 /* get slave (tty) */
393 if (tty < 0)
394 {
395#ifndef NO_SETOWNER_TTYDEV
396 chown (name, getuid (), ttyconf.gid); /* fail silently */
397 chmod (name, ttyconf.mode);
398# ifdef HAVE_REVOKE
399 revoke (name);
308# endif 400# endif
309 /* ---------------------------------------- */ 401#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__ */
319 402
403 if ((tty = get_tty (name)) < 0)
404 {
405 put ();
406 return false;
407 }
408 }
409
320 return 0; 410 return true;
321} 411}
322/*----------------------- end-of-file (C source) -----------------------*/ 412

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines