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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 1.26 by root, Mon Jan 2 15:10:18 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 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 27#ifdef HAVE_STDLIB_H
37# include <stdlib.h> 28# include <cstdlib>
38#endif 29#endif
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) 36#if defined(HAVE_STRING_H)
46# include <string.h> 37# include <cstring>
47#endif 38#endif
48#ifdef HAVE_FCNTL_H 39#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 40# include <fcntl.h>
50#endif 41#endif
51#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 43# include <sys/ioctl.h>
53#endif 44#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
56#endif 47#endif
57 48#ifdef HAVE_ISASTREAM
58#ifdef DEBUG_TTY 49# include <stropts.h>
59# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
60#else
61# define D_TTY(x)
62#endif 50#endif
51#ifdef HAVE_PTY_H
52# include <pty.h>
53#endif
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
59# include <util.h>
60#endif
61
62#include <cstdio>
63#include <grp.h>
63 64
64/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
67/* 68/*
68 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
69 * 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.
70 * 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
71 */ 72 */
72/* EXTPROTO */ 73static int
73int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
79
80 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
81 80
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
83 { 82 {
84 *ttydev = strdup (tty_name); 83 *ttydev = strdup (tty_name);
… …
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 94#ifdef PTYS_ARE_GETPTY
96
97 char *ptydev; 95 char *ptydev;
98 96
99 while ((ptydev = getpty ()) != NULL) 97 while ((ptydev = getpty ()) != NULL)
100 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 98 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
101 { 99 {
… …
109 107
110 { 108 {
111# ifdef PTYS_ARE_GETPT 109# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 110 pfd = getpt ();
113# else 111# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 112 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
116# endif 113# endif
117 114
118 if (pfd >= 0) 115 if (pfd >= 0)
119 { 116 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 117 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 118 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 119 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 120 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 121 return pfd;
125 } 122 }
126 close (pfd); 123 close (pfd);
127 } 124 }
128 } 125 }
… …
130#endif 127#endif
131 128
132#ifdef PTYS_ARE_PTC 129#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 130 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 131 {
135 *ttydev = ttyname (pfd); 132 *ttydev = strdup (ttyname (pfd));
136 return pfd; 133 return pfd;
137 } 134 }
138#endif 135#endif
139 136
140#ifdef PTYS_ARE_CLONE 137#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 138 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 139 {
143 *ttydev = ptsname (pfd); 140 *ttydev = strdup (ptsname (pfd));
144 return pfd; 141 return pfd;
145 } 142 }
146#endif 143#endif
147 144
148#ifdef PTYS_ARE_NUMERIC 145#ifdef PTYS_ARE_NUMERIC
149 { 146 {
150 int idx; 147 int idx;
151 char *c1, *c2; 148 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 149 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 150 char tty_name[] = "/dev/ttyp???";
154 151
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 152 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 153 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 154 for (idx = 0; idx < 256; idx++)
158 { 155 {
159 sprintf (c1, "%d", idx); 156 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 157 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 158 if (access (tty_name, F_OK) < 0)
162 { 159 {
163 idx = 256; 160 idx = 256;
164 break; 161 break;
165 } 162 }
163
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 165 {
168 if (access (tty_name, R_OK | W_OK) == 0) 166 if (access (tty_name, R_OK | W_OK) == 0)
169 { 167 {
170 *ttydev = strdup (tty_name); 168 *ttydev = strdup (tty_name);
171 return pfd; 169 return pfd;
172 } 170 }
171
173 close (pfd); 172 close (pfd);
174 } 173 }
175 } 174 }
176 } 175 }
177#endif 176#endif
177
178#ifdef PTYS_ARE_SEARCHED 178#ifdef PTYS_ARE_SEARCHED
179 { 179 {
180 const char *c1, *c2; 180 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 181 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 182 char tty_name[] = "/dev/tty??";
183 183
184# ifndef PTYCHAR1 184# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 185# define PTYCHAR1 "pqrstuvwxyz"
186# endif 186# endif
187# ifndef PTYCHAR2 187# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 201 if (access (tty_name, R_OK | W_OK) == 0)
202 { 202 {
203 *ttydev = strdup (tty_name); 203 *ttydev = strdup (tty_name);
204 return pfd; 204 return pfd;
205 } 205 }
206
206 close (pfd); 207 close (pfd);
207 } 208 }
208 } 209 }
209 } 210 }
210 } 211 }
211#endif 212#endif
213
212 return -1; 214 return -1;
213} 215}
214 216
215/*----------------------------------------------------------------------*/ 217/*----------------------------------------------------------------------*/
216/* 218/*
217 * Returns tty file descriptor, or -1 on failure 219 * Returns tty file descriptor, or -1 on failure
218 */ 220 */
219/* EXTPROTO */ 221static int
220int
221rxvt_get_tty (const char *ttydev) 222get_tty (char *ttydev)
222{ 223{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 224 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 225}
225 226
226/*----------------------------------------------------------------------*/ 227/*----------------------------------------------------------------------*/
227/* 228/*
228 * Make our tty a controlling tty so that /dev/tty points to us 229 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 230 */
230/* EXTPROTO */ 231static int
231int
232rxvt_control_tty (int fd_tty, const char *ttydev) 232control_tty (int fd_tty, const char *ttydev)
233{ 233{
234#ifndef __QNX__ 234#ifndef __QNX__
235 int fd; 235 int fd;
236 236
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 237 /* ---------------------------------------- */
239# ifdef HAVE_SETSID 238# ifdef HAVE_SETSID
240 setsid (); 239 setsid ();
241# endif 240# endif
242# if defined(HAVE_SETPGID) 241# if defined(HAVE_SETPGID)
243 setpgid (0, 0); 242 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP) 243# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0); 244 setpgrp (0, 0);
246# endif 245# endif
246
247 /* ---------------------------------------- */ 247 /* ---------------------------------------- */
248# ifdef TIOCNOTTY 248# ifdef TIOCNOTTY
249
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 249 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) 250 if (fd >= 0)
253 { 251 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 252 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd); 253 close (fd);
256 } 254 }
257# endif 255# endif
256
258 /* ---------------------------------------- */ 257 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 258 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) 259 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */ 260 close (fd); /* ouch: still have controlling tty */
261
263 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 263#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 264 /*
266 * Push STREAMS modules: 265 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 266 * ptem: pseudo-terminal hardware emulation module.
… …
281 */ 280 */
282# ifdef HAVE_ISASTREAM 281# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 282 if (isastream (fd_tty) == 1)
284# endif 283# endif
285 { 284 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 285 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 286 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 287 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 288 }
291#endif 289#endif
292 /* ---------------------------------------- */ 290 /* ---------------------------------------- */
293# if defined(TIOCSCTTY) 291# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 292 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY) 293# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 294 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 295# else
300 fd = open (ttydev, O_RDWR); 296 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 297 if (fd >= 0)
303 close (fd); 298 close (fd);
304# endif 299# endif
305 /* ---------------------------------------- */ 300 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 301 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) 302 if (fd < 0)
309 return -1; /* fatal */ 303 return -1; /* fatal */
310 close (fd); 304 close (fd);
311 /* ---------------------------------------- */ 305 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */ 306#endif /* ! __QNX__ */
315 307
316 return 0; 308 return 0;
317} 309}
310
311#ifndef NO_SETOWNER_TTYDEV
312static struct ttyconf {
313 gid_t gid;
314 mode_t mode;
315
316 ttyconf ()
317 {
318#ifdef TTY_GID_SUPPORT
319 struct group *gr = getgrnam ("tty");
320
321 if (gr)
322 { /* change group ownership of tty to "tty" */
323 mode = S_IRUSR | S_IWUSR | S_IWGRP;
324 gid = gr->gr_gid;
325 }
326 else
327#endif /* TTY_GID_SUPPORT */
328 {
329 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
330 gid = getgid ();
331 }
332 }
333} ttyconf;
334
335void
336rxvt_ptytty::privileges (rxvt_privaction action)
337{
338 if (!name || !*name)
339 return;
340
341 rxvt_privileges (RESTORE);
342
343 if (action == SAVE)
344 {
345# ifndef RESET_TTY_TO_COMMON_DEFAULTS
346 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
347 if (lstat (name, &savestat) < 0) /* you lose out */
348 ;
349 else
350# endif
351 {
352 saved = true;
353 chown (name, getuid (), ttyconf.gid); /* fail silently */
354 chmod (name, ttyconf.mode);
355# ifdef HAVE_REVOKE
356 revoke (name);
357# endif
358 }
359 }
360 else
361 { /* action == RESTORE */
362# ifndef RESET_TTY_TO_COMMON_DEFAULTS
363 if (saved)
364 {
365 chmod (name, savestat.st_mode);
366 chown (name, savestat.st_uid, savestat.st_gid);
367 }
368# else
369 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
370 chown (name, 0, 0);
371# endif
372
373 }
374
375 rxvt_privileges (IGNORE);
376}
377#endif
378
379rxvt_ptytty::rxvt_ptytty ()
380{
381 pty = tty = -1;
382 name = 0;
383#ifndef NO_SETOWNER_TTYDEV
384 saved = false;
385#endif
386}
387
388rxvt_ptytty::~rxvt_ptytty ()
389{
390 put ();
391}
392
393void
394
395rxvt_ptytty::close_tty ()
396{
397 if (tty >= 0) close (tty);
398 tty = -1;
399}
400
401void
402rxvt_ptytty::put ()
403{
404#ifndef NO_SETOWNER_TTYDEV
405 if (tty >= 0)
406 privileges (RESTORE);
407#endif
408
409 if (pty >= 0) close (pty);
410 close_tty ();
411 free (name);
412
413 pty = tty = -1;
414 name = 0;
415}
416
417bool
418rxvt_ptytty::make_controlling_tty ()
419{
420 return control_tty (tty, name) >= 0;
421}
422
423bool
424rxvt_ptytty::get ()
425{
426 /* get master (pty) */
427 if ((pty = get_pty (&tty, &name)) < 0)
428 return false;
429
430 fcntl (pty, F_SETFL, O_NONBLOCK);
431
432 /* get slave (tty) */
433 if (tty < 0)
434 {
435#ifndef NO_SETOWNER_TTYDEV
436 privileges (SAVE);
437#endif
438
439 if ((tty = get_tty (name)) < 0)
440 {
441 put ();
442 return false;
443 }
444 }
445
446 return true;
447}
448
449void
450rxvt_ptytty::set_utf8_mode (bool on)
451{
452#ifdef IUTF8
453 if (pty != -1)
454 {
455 struct termios tio;
456
457 if (tcgetattr (pty, &tio) != -1)
458 {
459 tcflag_t new_cflag = tio.c_iflag;
460
461 if (on)
462 new_cflag |= IUTF8;
463 else
464 new_cflag &= ~IUTF8;
465
466 if (new_cflag != tio.c_iflag)
467 {
468 tio.c_iflag = new_cflag;
469 tcsetattr (pty, TCSANOW, &tio);
470 }
471 }
472 }
473#endif
474}
475
318/*----------------------- end-of-file (C source) -----------------------*/ 476/*----------------------- end-of-file (C source) -----------------------*/
477

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