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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.7 by pcg, Mon Mar 1 01:06:46 2004 UTC vs.
Revision 1.64 by ayin, Tue Jun 26 00:40:28 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 <stdio.h>
36#ifdef HAVE_STDLIB_H
37# include <stdlib.h> 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 <string.h>
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 46#ifdef HAVE_ISASTREAM
58#ifdef DEBUG_TTY 47# include <stropts.h>
59# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
60#else
61# define D_TTY(x)
62#endif 48#endif
49#if defined(HAVE_PTY_H)
50# include <pty.h>
51#elif defined(HAVE_LIBUTIL_H)
52# include <libutil.h>
53#elif defined(HAVE_UTIL_H)
54# include <util.h>
55#endif
56#ifdef TTY_GID_SUPPORT
57#include <grp.h>
58#endif
59
60#include <cstdio>
61
62/////////////////////////////////////////////////////////////////////////////
63 63
64/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 66 * ------------------------------------------------------------------------- */
67/* 67/*
68 * Returns pty file descriptor, or -1 on failure 68 * Returns pty file descriptor, or -1 on failure
69 * 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.
70 * 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
71 */ 71 */
72/* EXTPROTO */ 72#if defined(UNIX98_PTY)
73int 73
74 static int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
75{ 76 {
76 int pfd; 77 int pfd;
77 78
78#ifdef PTYS_ARE_OPENPTY 79# if defined(HAVE_GETPT)
79
80 char tty_name[sizeof "/dev/pts/????\0"];
81
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
83 {
84 *ttydev = strdup (tty_name);
85 return pfd;
86 }
87#endif
88
89#ifdef PTYS_ARE__GETPTY
90 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
91 if (*ttydev != NULL)
92 return pfd;
93#endif
94
95#ifdef PTYS_ARE_GETPTY
96
97 char *ptydev;
98
99 while ((ptydev = getpty ()) != NULL)
100 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
101 {
102 *ttydev = ptydev;
103 return pfd;
104 }
105#endif
106
107#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
108# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
109
110 {
111# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 80 pfd = getpt();
81# elif defined(HAVE_POSIX_OPENPT)
82 pfd = posix_openpt (O_RDWR);
113# else 83# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 84 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
116# endif 85# endif
117 86
118 if (pfd >= 0) 87 if (pfd >= 0)
119 { 88 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 89 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 90 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 91 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 92 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 93 return pfd;
125 } 94 }
95
126 close (pfd); 96 close (pfd);
127 } 97 }
128 }
129# endif
130#endif
131 98
132#ifdef PTYS_ARE_PTC 99 return -1;
133 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];
110
111 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
112
113 if (res != -1)
134 { 114 {
135 *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)
136 return pfd; 132 return pfd;
133
134 return -1;
137 } 135 }
138#endif
139 136
140#ifdef PTYS_ARE_CLONE 137#elif defined(HAVE_DEV_PTC)
138
139 static int
140 get_pty (int *fd_tty, char **ttydev)
141 {
142 int pfd;
143
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 144 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
142 {
143 *ttydev = ptsname (pfd);
144 return pfd;
145 }
146#endif
147
148#ifdef PTYS_ARE_NUMERIC
149 {
150 int idx;
151 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???";
154
155 c1 = & (pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++)
158 { 145 {
159 sprintf (c1, "%d", idx); 146 *ttydev = strdup (ttyname (pfd));
160 sprintf (c2, "%d", idx); 147 return pfd;
161 if (access (tty_name, F_OK) < 0) 148 }
149
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
160 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
162 *ttydev = strdup (ptsname (pfd));
163 return pfd;
164 }
165
166 return -1;
167 }
168
169#else
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
182 for (i = 0; i < 256; i++)
183 {
184 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
185 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
186
187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
162 { 188 {
163 idx = 256; 189 snprintf(pty_name, 32, "/dev/ptyp%d", i);
164 break; 190 snprintf(tty_name, 32, "/dev/ttyp%d", i);
191 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
192 continue;
165 } 193 }
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 194
195 if (access (tty_name, R_OK | W_OK) == 0)
167 { 196 {
168 if (access (tty_name, R_OK | W_OK) == 0)
169 {
170 *ttydev = strdup (tty_name); 197 *ttydev = strdup (tty_name);
171 return pfd; 198 return pfd;
172 }
173 close (pfd);
174 } 199 }
200
201 close (pfd);
175 } 202 }
176 }
177#endif
178#ifdef PTYS_ARE_SEARCHED
179 {
180 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??";
183 203
184# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz"
186# endif
187# ifndef PTYCHAR2
188# define PTYCHAR2 "0123456789abcdef"
189# endif
190
191 for (c1 = PTYCHAR1; *c1; c1++)
192 {
193 pty_name[ (sizeof (pty_name) - 3)] =
194 tty_name[ (sizeof (pty_name) - 3)] = *c1;
195 for (c2 = PTYCHAR2; *c2; c2++)
196 {
197 pty_name[ (sizeof (pty_name) - 2)] =
198 tty_name[ (sizeof (pty_name) - 2)] = *c2;
199 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
200 {
201 if (access (tty_name, R_OK | W_OK) == 0)
202 {
203 *ttydev = strdup (tty_name);
204 return pfd;
205 }
206 close (pfd);
207 }
208 }
209 }
210 }
211#endif
212 return -1; 204 return -1;
213} 205 }
206
207#endif
214 208
215/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
216/* 210/*
217 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
218 */ 212 */
219/* EXTPROTO */ 213static int
220int
221rxvt_get_tty (const char *ttydev) 214get_tty (char *ttydev)
222{ 215{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 216 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 217}
225 218
226/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
227/* 220/*
228 * 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
229 */ 222 */
230/* EXTPROTO */ 223static int
231int 224control_tty (int fd_tty)
232rxvt_control_tty (int fd_tty, const char *ttydev)
233{ 225{
234#ifndef __QNX__
235 int fd;
236
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 226 setsid ();
241# endif
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 /* ---------------------------------------- */
248# ifdef TIOCNOTTY
249 227
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
252 if (fd >= 0)
253 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd);
256 }
257# endif
258 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
261 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */
263 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 228#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
265 /* 229 /*
266 * Push STREAMS modules: 230 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 231 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 232 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 233 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
281 */ 245 */
282# ifdef HAVE_ISASTREAM 246# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 247 if (isastream (fd_tty) == 1)
284# endif 248# endif
285 { 249 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 250 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 251 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 252 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 253 }
291#endif 254#endif
292 /* ---------------------------------------- */ 255
293# if defined(TIOCSCTTY) 256#ifdef TIOCSCTTY
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 257 ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 258#else
300 fd = open (ttydev, O_RDWR); 259 fd = open (name, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 260 if (fd >= 0)
303 close (fd); 261 close (fd);
262#endif
263
264 int fd = open ("/dev/tty", O_WRONLY);
265 if (fd < 0)
266 return -1; /* fatal */
267
268 close (fd);
269
270 return 0;
271}
272
273void
274ptytty::close_tty ()
275{
276 if (tty < 0)
277 return;
278
279 close (tty);
280 tty = -1;
281}
282
283bool
284ptytty::make_controlling_tty ()
285{
286 return control_tty (tty) >= 0;
287}
288
289void
290ptytty::set_utf8_mode (bool on)
291{
292#ifdef IUTF8
293 if (pty < 0)
294 return;
295
296 struct termios tio;
297
298 if (tcgetattr (pty, &tio) != -1)
299 {
300 tcflag_t new_cflag = tio.c_iflag;
301
302 if (on)
303 new_cflag |= IUTF8;
304 else
305 new_cflag &= ~IUTF8;
306
307 if (new_cflag != tio.c_iflag)
308 {
309 tio.c_iflag = new_cflag;
310 tcsetattr (pty, TCSANOW, &tio);
311 }
312 }
313#endif
314}
315
316static struct ttyconf {
317 gid_t gid;
318 mode_t mode;
319
320 ttyconf ()
321 {
322#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty");
324
325 if (gr)
326 { /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid;
329 }
330 else
331#endif /* TTY_GID_SUPPORT */
332 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = 0;
335 }
336 }
337} ttyconf;
338
339ptytty_unix::ptytty_unix ()
340{
341 name = 0;
342#if UTMP_SUPPORT
343 cmd_pid = 0;
344#endif
345}
346
347ptytty_unix::~ptytty_unix ()
348{
349#if UTMP_SUPPORT
350 logout ();
351#endif
352 put ();
353}
354
355void
356ptytty_unix::put ()
357{
358 if (name)
359 {
360 chmod (name, RESTORE_TTY_MODE);
361 chown (name, 0, ttyconf.gid);
362 }
363
364 close_tty ();
365
366 if (pty >= 0)
367 close (pty);
368
369 free (name);
370
371 pty = tty = -1;
372 name = 0;
373}
374
375bool
376ptytty_unix::get ()
377{
378 /* get master (pty) */
379 if ((pty = get_pty (&tty, &name)) < 0)
380 return false;
381
382 fcntl (pty, F_SETFL, O_NONBLOCK);
383
384 /* get slave (tty) */
385 if (tty < 0)
386 {
387#ifndef NO_SETOWNER_TTYDEV
388 chown (name, getuid (), ttyconf.gid); /* fail silently */
389 chmod (name, ttyconf.mode);
390# ifdef HAVE_REVOKE
391 revoke (name);
304# endif 392# endif
305 /* ---------------------------------------- */ 393#endif
306 fd = open ("/dev/tty", O_WRONLY);
307 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
308 if (fd < 0)
309 return -1; /* fatal */
310 close (fd);
311 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */
315 394
395 if ((tty = get_tty (name)) < 0)
396 {
397 put ();
398 return false;
399 }
400 }
401
316 return 0; 402 return true;
317} 403}
318/*----------------------- end-of-file (C source) -----------------------*/ 404

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