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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 1.38 by root, Tue Jan 17 11:53:07 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
7 * 8 *
8 * This program is free software; you can redistribute it and/or modify 9 * 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 10 * 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 11 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 12 * (at your option) any later version.
… …
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
22 23
23#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
24 26
25/*
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28
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> 27# include <cstdlib>
38#endif 28# include <cstring>
29
39#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
40# include <sys/types.h> 31# include <sys/types.h>
41#endif 32#endif
42#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
43# include <unistd.h> 34# include <unistd.h>
44#endif 35#endif
45#if defined(HAVE_STRING_H)
46# include <string.h>
47#endif
48#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 37# include <fcntl.h>
50#endif 38#endif
51#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 40# include <sys/ioctl.h>
53#endif 41#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
56#endif 44#endif
57 45#ifdef HAVE_ISASTREAM
58#ifdef DEBUG_TTY 46# include <stropts.h>
59# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
60#else
61# define D_TTY(x)
62#endif 47#endif
48#if defined(HAVE_PTY_H)
49# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h>
52#elif defined(HAVE_UTIL_H)
53# include <util.h>
54#endif
55
56#include <cstdio>
57#include <grp.h>
58
59/////////////////////////////////////////////////////////////////////////////
63 60
64/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
67/* 64/*
68 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
69 * If successful, ttydev is set to the name of the slave device. 66 * 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 67 * fd_tty _may_ also be set to an open fd to the slave device
71 */ 68 */
72/* EXTPROTO */ 69static int
73int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 70get_pty (int *fd_tty, char **ttydev)
75{ 71{
76 int pfd; 72 int pfd;
77 73
78#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
79
80 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
81 76
77 rxvt_privileges(RESTORE);
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1)
83 { 82 {
84 *ttydev = strdup (tty_name); 83 *ttydev = strdup (tty_name);
85 return pfd; 84 return pfd;
86 } 85 }
87#endif 86#endif
… …
90 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
91 if (*ttydev != NULL) 90 if (*ttydev != NULL)
92 return pfd; 91 return pfd;
93#endif 92#endif
94 93
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) 94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
108# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
109 96
110 { 97 {
111# ifdef PTYS_ARE_GETPT 98# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 99 pfd = getpt();
113# else 100# else
114 101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
105# endif
116# endif 106# endif
117 107
118 if (pfd >= 0) 108 if (pfd >= 0)
119 { 109 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 110 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 111 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 112 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 114 return pfd;
125 } 115 }
126 close (pfd); 116 close (pfd);
127 } 117 }
128 } 118 }
… …
130#endif 120#endif
131 121
132#ifdef PTYS_ARE_PTC 122#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 124 {
135 *ttydev = ttyname (pfd); 125 *ttydev = strdup (ttyname (pfd));
136 return pfd; 126 return pfd;
137 } 127 }
138#endif 128#endif
139 129
140#ifdef PTYS_ARE_CLONE 130#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 132 {
143 *ttydev = ptsname (pfd); 133 *ttydev = strdup (ptsname (pfd));
144 return pfd; 134 return pfd;
145 } 135 }
146#endif 136#endif
147 137
148#ifdef PTYS_ARE_NUMERIC 138#ifdef PTYS_ARE_NUMERIC
149 { 139 {
150 int idx; 140 int idx;
151 char *c1, *c2; 141 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 142 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 143 char tty_name[] = "/dev/ttyp???";
154 144
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 145 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 146 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 147 for (idx = 0; idx < 256; idx++)
158 { 148 {
159 sprintf (c1, "%d", idx); 149 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 150 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 151 if (access (tty_name, F_OK) < 0)
162 { 152 {
163 idx = 256; 153 idx = 256;
164 break; 154 break;
165 } 155 }
156
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 158 {
168 if (access (tty_name, R_OK | W_OK) == 0) 159 if (access (tty_name, R_OK | W_OK) == 0)
169 { 160 {
170 *ttydev = strdup (tty_name); 161 *ttydev = strdup (tty_name);
171 return pfd; 162 return pfd;
172 } 163 }
164
173 close (pfd); 165 close (pfd);
174 } 166 }
175 } 167 }
176 } 168 }
177#endif 169#endif
170
178#ifdef PTYS_ARE_SEARCHED 171#ifdef PTYS_ARE_SEARCHED
179 { 172 {
180 const char *c1, *c2; 173 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 174 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 175 char tty_name[] = "/dev/tty??";
183 176
184# ifndef PTYCHAR1 177# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 178# define PTYCHAR1 "pqrstuvwxyz"
186# endif 179# endif
187# ifndef PTYCHAR2 180# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 194 if (access (tty_name, R_OK | W_OK) == 0)
202 { 195 {
203 *ttydev = strdup (tty_name); 196 *ttydev = strdup (tty_name);
204 return pfd; 197 return pfd;
205 } 198 }
199
206 close (pfd); 200 close (pfd);
207 } 201 }
208 } 202 }
209 } 203 }
210 } 204 }
211#endif 205#endif
206
212 return -1; 207 return -1;
213} 208}
214 209
215/*----------------------------------------------------------------------*/ 210/*----------------------------------------------------------------------*/
216/* 211/*
217 * Returns tty file descriptor, or -1 on failure 212 * Returns tty file descriptor, or -1 on failure
218 */ 213 */
219/* EXTPROTO */ 214static int
220int
221rxvt_get_tty (const char *ttydev) 215get_tty (char *ttydev)
222{ 216{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 217 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 218}
225 219
226/*----------------------------------------------------------------------*/ 220/*----------------------------------------------------------------------*/
227/* 221/*
228 * Make our tty a controlling tty so that /dev/tty points to us 222 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 223 */
230/* EXTPROTO */ 224static int
231int 225control_tty (int fd_tty)
232rxvt_control_tty (int fd_tty, const char *ttydev)
233{ 226{
234#ifndef __QNX__
235 int fd; 227 int fd;
236 228
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 229 /* ---------------------------------------- */
239# ifdef HAVE_SETSID
240 setsid (); 230 setsid ();
241# endif 231
242# if defined(HAVE_SETPGID)
243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0);
246# endif
247 /* ---------------------------------------- */ 232 /* ---------------------------------------- */
248# ifdef TIOCNOTTY
249
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) 233# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 234 /*
266 * Push STREAMS modules: 235 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
268 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
269 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
277 * documentation is really unclear about whether it is any close () on 246 * documentation is really unclear about whether it is any close () on
278 * the master side or the last close () - i.e. a proper STREAMS dismantling 247 * the master side or the last close () - i.e. a proper STREAMS dismantling
279 * close () - on the master side which causes a hang up to be sent 248 * close () - on the master side which causes a hang up to be sent
280 * through - Geoff Wing 249 * through - Geoff Wing
281 */ 250 */
282# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
284# endif 253# endif
285 { 254 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 258 }
291#endif 259# endif
292 /* ---------------------------------------- */ 260 /* ---------------------------------------- */
293# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 261 fd = 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
300 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0)
303 close (fd);
304# endif
305 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 263 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) 264 if (fd < 0)
309 return -1; /* fatal */ 265 return -1; /* fatal */
310 close (fd); 266 close (fd);
311 /* ---------------------------------------- */ 267 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */
315 268
316 return 0; 269 return 0;
317} 270}
271
272void
273rxvt_ptytty::close_tty ()
274{
275 if (tty < 0)
276 return;
277
278 close (tty);
279 tty = -1;
280}
281
282bool
283rxvt_ptytty::make_controlling_tty ()
284{
285 return control_tty (tty) >= 0;
286}
287
288void
289rxvt_ptytty::set_utf8_mode (bool on)
290{
291#ifdef IUTF8
292 if (pty < 0)
293 return;
294
295 struct termios tio;
296
297 if (tcgetattr (pty, &tio) != -1)
298 {
299 tcflag_t new_cflag = tio.c_iflag;
300
301 if (on)
302 new_cflag |= IUTF8;
303 else
304 new_cflag &= ~IUTF8;
305
306 if (new_cflag != tio.c_iflag)
307 {
308 tio.c_iflag = new_cflag;
309 tcsetattr (pty, TCSANOW, &tio);
310 }
311 }
312#endif
313}
314
315/////////////////////////////////////////////////////////////////////////////
316
317#ifndef NO_SETOWNER_TTYDEV
318static struct ttyconf {
319 gid_t gid;
320 mode_t mode;
321
322 ttyconf ()
323 {
324#ifdef TTY_GID_SUPPORT
325 struct group *gr = getgrnam ("tty");
326
327 if (gr)
328 { /* change group ownership of tty to "tty" */
329 mode = S_IRUSR | S_IWUSR | S_IWGRP;
330 gid = gr->gr_gid;
331 }
332 else
333#endif /* TTY_GID_SUPPORT */
334 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = getgid ();
337 }
338 }
339} ttyconf;
340
341/////////////////////////////////////////////////////////////////////////////
342
343void
344rxvt_ptytty_unix::privileges (rxvt_privaction action)
345{
346 if (!name || !*name)
347 return;
348
349 rxvt_privileges (RESTORE);
350
351 if (action == SAVE)
352 {
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
355 if (lstat (name, &savestat) < 0) /* you lose out */
356 ;
357 else
358# endif
359 {
360 saved = true;
361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
366 }
367 }
368 else
369 { /* action == RESTORE */
370# ifndef RESET_TTY_TO_COMMON_DEFAULTS
371 if (saved)
372 {
373 chmod (name, savestat.st_mode);
374 chown (name, savestat.st_uid, savestat.st_gid);
375 }
376# else
377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
378 chown (name, 0, 0);
379# endif
380
381 }
382
383 rxvt_privileges (IGNORE);
384}
385#endif
386
387rxvt_ptytty_unix::rxvt_ptytty_unix ()
388{
389 pty = tty = -1;
390 name = 0;
391#ifndef NO_SETOWNER_TTYDEV
392 saved = false;
393#endif
394#if UTMP_SUPPORT
395 cmd_pid = 0;
396#endif
397}
398
399rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{
401 logout ();
402 put ();
403}
404
405void
406rxvt_ptytty_unix::put ()
407{
408#ifndef NO_SETOWNER_TTYDEV
409 privileges (RESTORE);
410#endif
411
412 if (pty >= 0) close (pty);
413 close_tty ();
414 free (name);
415
416 pty = tty = -1;
417 name = 0;
418}
419
420bool
421rxvt_ptytty_unix::get ()
422{
423 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0)
425 return false;
426
427 fcntl (pty, F_SETFL, O_NONBLOCK);
428
429 /* get slave (tty) */
430 if (tty < 0)
431 {
432#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE);
434#endif
435
436 if ((tty = get_tty (name)) < 0)
437 {
438 put ();
439 return false;
440 }
441 }
442
443 return true;
444}
445
318/*----------------------- end-of-file (C source) -----------------------*/ 446/*----------------------- end-of-file (C source) -----------------------*/
447

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