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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 1.62 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"
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 73static int
78rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
79{ 75{
80 int pfd; 76 int pfd;
81 77
82#ifdef PTYS_ARE_OPENPTY 78# if defined(HAVE_GETPT)
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 }
83 93
84 char tty_name[sizeof "/dev/pts/????\0"]; 94 close (pfd);
95 }
85 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
86 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 107 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
108 if (res != -1)
87 { 109 {
88 *ttydev = strdup (tty_name); 110 *ttydev = strdup (tty_name);
89 return pfd; 111 return pfd;
90 } 112 }
91#endif
92 113
93#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
94 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
95 if (*ttydev != NULL) 123 if (*ttydev != NULL)
96 return pfd; 124 return pfd;
97#endif
98 125
99#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;
100 133
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 ();
117# else
118
119 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
120# endif
121
122 if (pfd >= 0)
123 {
124 if (grantpt (pfd) == 0 /* change slave permissions */
125 && unlockpt (pfd) == 0)
126 { /* slave now unlocked */
127 *ttydev = ptsname (pfd); /* get slave's name */
128 return pfd;
129 }
130 close (pfd);
131 }
132 }
133# endif
134#endif
135
136#ifdef PTYS_ARE_PTC
137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
138 { 135 {
139 *ttydev = ttyname (pfd); 136 *ttydev = strdup (ttyname (pfd));
140 return pfd; 137 return pfd;
141 } 138 }
142#endif
143 139
144#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
145 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)
146 { 149 {
147 *ttydev = ptsname (pfd); 150 *ttydev = strdup (ptsname (pfd));
148 return pfd; 151 return pfd;
149 } 152 }
150#endif
151 153
152#ifdef PTYS_ARE_NUMERIC 154 return -1;
153 { 155}
154 int idx; 156#else
155 char *c1, *c2; 157/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
156 char pty_name[] = "/dev/ptyp???"; 158static int
157 char tty_name[] = "/dev/ttyp???"; 159get_pty (int *fd_tty, char **ttydev)
158 160{
159 c1 = & (pty_name[sizeof (pty_name) - 4]); 161 int pfd;
160 c2 = & (tty_name[sizeof (tty_name) - 4]); 162 int i;
163 char pty_name[32];
164 char tty_name[32];
165 const char *majors = "pqrstuvwxyzabcde";
166 const char *minors = "0123456789abcdef";
161 for (idx = 0; idx < 256; idx++) 167 for (i = 0; i < 256; i++)
162 { 168 {
163 sprintf (c1, "%d", idx); 169 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
164 sprintf (c2, "%d", idx); 170 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
165 if (access (tty_name, F_OK) < 0)
166 {
167 idx = 256;
168 break;
169 }
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 171 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
171 { 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 }
172 if (access (tty_name, R_OK | W_OK) == 0) 178 if (access (tty_name, R_OK | W_OK) == 0)
173 { 179 {
174 *ttydev = strdup (tty_name); 180 *ttydev = strdup (tty_name);
175 return pfd; 181 return pfd;
176 }
177 close (pfd);
178 } 182 }
183
184 close (pfd);
179 } 185 }
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??";
187 186
188# ifndef PTYCHAR1 187 return -1;
189# define PTYCHAR1 "pqrstuvwxyz" 188}
190# endif 189#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;
217}
218 190
219/*----------------------------------------------------------------------*/ 191/*----------------------------------------------------------------------*/
220/* 192/*
221 * Returns tty file descriptor, or -1 on failure 193 * Returns tty file descriptor, or -1 on failure
222 */ 194 */
223/* EXTPROTO */ 195static int
224int
225rxvt_get_tty (const char *ttydev) 196get_tty (char *ttydev)
226{ 197{
227 return open (ttydev, O_RDWR | O_NOCTTY, 0); 198 return open (ttydev, O_RDWR | O_NOCTTY, 0);
228} 199}
229 200
230/*----------------------------------------------------------------------*/ 201/*----------------------------------------------------------------------*/
231/* 202/*
232 * 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
233 */ 204 */
234/* EXTPROTO */ 205static int
235int 206control_tty (int fd_tty)
236rxvt_control_tty (int fd_tty, const char *ttydev)
237{ 207{
238#ifndef __QNX__
239 int fd;
240
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 (); 208 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
253 209
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) 210#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
269 /* 211 /*
270 * Push STREAMS modules: 212 * Push STREAMS modules:
271 * ptem: pseudo-terminal hardware emulation module. 213 * ptem: pseudo-terminal hardware emulation module.
272 * ldterm: standard terminal line discipline. 214 * ldterm: standard terminal line discipline.
273 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 215 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
285 */ 227 */
286# ifdef HAVE_ISASTREAM 228# ifdef HAVE_ISASTREAM
287 if (isastream (fd_tty) == 1) 229 if (isastream (fd_tty) == 1)
288# endif 230# endif
289 { 231 {
290 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
291 ioctl (fd_tty, I_PUSH, "ptem"); 232 ioctl (fd_tty, I_PUSH, "ptem");
292 ioctl (fd_tty, I_PUSH, "ldterm"); 233 ioctl (fd_tty, I_PUSH, "ldterm");
293 ioctl (fd_tty, I_PUSH, "ttcompat"); 234 ioctl (fd_tty, I_PUSH, "ttcompat");
294 } 235 }
295#endif 236#endif
296 /* ---------------------------------------- */ 237
297# if defined(TIOCSCTTY)
298 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 238 ioctl (fd_tty, TIOCSCTTY, NULL);
299 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); 239
300# elif defined(TIOCSETCTTY) 240 int fd = open ("/dev/tty", O_WRONLY);
301 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
302 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
303# else
304 fd = open (ttydev, O_RDWR);
305 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
306 if (fd >= 0) 241 if (fd < 0)
242 return -1; /* fatal */
243
307 close (fd); 244 close (fd);
245
246 return 0;
247}
248
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
292static struct ttyconf {
293 gid_t gid;
294 mode_t mode;
295
296 ttyconf ()
297 {
298#ifdef TTY_GID_SUPPORT
299 struct group *gr = getgrnam ("tty");
300
301 if (gr)
302 { /* change group ownership of tty to "tty" */
303 mode = S_IRUSR | S_IWUSR | S_IWGRP;
304 gid = gr->gr_gid;
305 }
306 else
307#endif /* TTY_GID_SUPPORT */
308 {
309 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
310 gid = 0;
311 }
312 }
313} ttyconf;
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
332ptytty_unix::put ()
333{
334 chmod (name, RESTORE_TTY_MODE);
335 chown (name, 0, ttyconf.gid);
336
337 close_tty ();
338
339 if (pty >= 0)
340 close (pty);
341
342 free (name);
343
344 pty = tty = -1;
345 name = 0;
346}
347
348bool
349ptytty_unix::get ()
350{
351 /* get master (pty) */
352 if ((pty = get_pty (&tty, &name)) < 0)
353 return false;
354
355 fcntl (pty, F_SETFL, O_NONBLOCK);
356
357 /* get slave (tty) */
358 if (tty < 0)
359 {
360#ifndef NO_SETOWNER_TTYDEV
361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
308# endif 365# endif
309 /* ---------------------------------------- */ 366#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__ */
319 367
368 if ((tty = get_tty (name)) < 0)
369 {
370 put ();
371 return false;
372 }
373 }
374
320 return 0; 375 return true;
321} 376}
322/*----------------------- end-of-file (C source) -----------------------*/ 377

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