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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC vs.
Revision 1.31 by root, Tue Jan 10 18:09:22 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 <cstdio>
36#ifdef HAVE_STDLIB_H
37# include <cstdlib> 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 <cstring>
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#ifdef HAVE_ISASTREAM 45#ifdef HAVE_ISASTREAM
58# include <stropts.h> 46# include <stropts.h>
59#endif 47#endif
60 48#if defined(HAVE_PTY_H)
61#ifdef DEBUG_TTY 49# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 50#elif defined(HAVE_LIBUTIL_H)
63#else 51# include <libutil.h>
64# define D_TTY(x) 52#elif defined(HAVE_UTIL_H)
53# include <util.h>
65#endif 54#endif
55
56#include <cstdio>
57#include <grp.h>
66 58
67/* ------------------------------------------------------------------------- * 59/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 60 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 61 * ------------------------------------------------------------------------- */
70/* 62/*
71 * Returns pty file descriptor, or -1 on failure 63 * Returns pty file descriptor, or -1 on failure
72 * If successful, ttydev is set to the name of the slave device. 64 * If successful, ttydev is set to the name of the slave device.
73 * fd_tty _may_ also be set to an open fd to the slave device 65 * fd_tty _may_ also be set to an open fd to the slave device
74 */ 66 */
75/* EXTPROTO */ 67static int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 68get_pty (int *fd_tty, char **ttydev)
78{ 69{
79 int pfd; 70 int pfd;
80 71
81#ifdef PTYS_ARE_OPENPTY 72#ifdef PTYS_ARE_OPENPTY
82
83 char tty_name[sizeof "/dev/pts/????\0"]; 73 char tty_name[sizeof "/dev/pts/????\0"];
84 74
75 rxvt_privileges(RESTORE);
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 76 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77 rxvt_privileges(IGNORE);
78
79 if (res != -1)
86 { 80 {
87 *ttydev = strdup (tty_name); 81 *ttydev = strdup (tty_name);
88 return pfd; 82 return pfd;
89 } 83 }
90#endif 84#endif
… …
94 if (*ttydev != NULL) 88 if (*ttydev != NULL)
95 return pfd; 89 return pfd;
96#endif 90#endif
97 91
98#ifdef PTYS_ARE_GETPTY 92#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev; 93 char *ptydev;
101 94
102 while ((ptydev = getpty ()) != NULL) 95 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 96 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 { 97 {
… …
112 105
113 { 106 {
114# ifdef PTYS_ARE_GETPT 107# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 108 pfd = getpt ();
116# else 109# else
117
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 110 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
119# endif 111# endif
120 112
121 if (pfd >= 0) 113 if (pfd >= 0)
122 { 114 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 115 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 116 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 117 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 118 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 119 return pfd;
128 } 120 }
129 close (pfd); 121 close (pfd);
130 } 122 }
131 } 123 }
… …
133#endif 125#endif
134 126
135#ifdef PTYS_ARE_PTC 127#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 128 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 129 {
138 *ttydev = ttyname (pfd); 130 *ttydev = strdup (ttyname (pfd));
139 return pfd; 131 return pfd;
140 } 132 }
141#endif 133#endif
142 134
143#ifdef PTYS_ARE_CLONE 135#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 136 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 137 {
146 *ttydev = ptsname (pfd); 138 *ttydev = strdup (ptsname (pfd));
147 return pfd; 139 return pfd;
148 } 140 }
149#endif 141#endif
150 142
151#ifdef PTYS_ARE_NUMERIC 143#ifdef PTYS_ARE_NUMERIC
152 { 144 {
153 int idx; 145 int idx;
154 char *c1, *c2; 146 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 147 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 148 char tty_name[] = "/dev/ttyp???";
157 149
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 150 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 151 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 152 for (idx = 0; idx < 256; idx++)
161 { 153 {
162 sprintf (c1, "%d", idx); 154 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 155 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 156 if (access (tty_name, F_OK) < 0)
165 { 157 {
166 idx = 256; 158 idx = 256;
167 break; 159 break;
168 } 160 }
161
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 163 {
171 if (access (tty_name, R_OK | W_OK) == 0) 164 if (access (tty_name, R_OK | W_OK) == 0)
172 { 165 {
173 *ttydev = strdup (tty_name); 166 *ttydev = strdup (tty_name);
174 return pfd; 167 return pfd;
175 } 168 }
169
176 close (pfd); 170 close (pfd);
177 } 171 }
178 } 172 }
179 } 173 }
180#endif 174#endif
175
181#ifdef PTYS_ARE_SEARCHED 176#ifdef PTYS_ARE_SEARCHED
182 { 177 {
183 const char *c1, *c2; 178 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 179 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 180 char tty_name[] = "/dev/tty??";
186 181
187# ifndef PTYCHAR1 182# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 183# define PTYCHAR1 "pqrstuvwxyz"
189# endif 184# endif
190# ifndef PTYCHAR2 185# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 199 if (access (tty_name, R_OK | W_OK) == 0)
205 { 200 {
206 *ttydev = strdup (tty_name); 201 *ttydev = strdup (tty_name);
207 return pfd; 202 return pfd;
208 } 203 }
204
209 close (pfd); 205 close (pfd);
210 } 206 }
211 } 207 }
212 } 208 }
213 } 209 }
214#endif 210#endif
211
215 return -1; 212 return -1;
216} 213}
217 214
218/*----------------------------------------------------------------------*/ 215/*----------------------------------------------------------------------*/
219/* 216/*
220 * Returns tty file descriptor, or -1 on failure 217 * Returns tty file descriptor, or -1 on failure
221 */ 218 */
222/* EXTPROTO */ 219static int
223int
224rxvt_get_tty (const char *ttydev) 220get_tty (char *ttydev)
225{ 221{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 222 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 223}
228 224
229/*----------------------------------------------------------------------*/ 225/*----------------------------------------------------------------------*/
230/* 226/*
231 * Make our tty a controlling tty so that /dev/tty points to us 227 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 228 */
233/* EXTPROTO */ 229static int
234int
235rxvt_control_tty (int fd_tty, const char *ttydev) 230control_tty (int fd_tty, const char *ttydev)
236{ 231{
237#ifndef __QNX__ 232#ifndef __QNX__
238 int fd; 233 int fd;
239 234
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 235 /* ---------------------------------------- */
242# ifdef HAVE_SETSID 236# ifdef HAVE_SETSID
243 setsid (); 237 setsid ();
244# endif 238# endif
245# if defined(HAVE_SETPGID) 239# if defined(HAVE_SETPGID)
246 setpgid (0, 0); 240 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP) 241# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0); 242 setpgrp (0, 0);
249# endif 243# endif
244
250 /* ---------------------------------------- */ 245 /* ---------------------------------------- */
251# ifdef TIOCNOTTY 246# ifdef TIOCNOTTY
252
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 247 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
255 if (fd >= 0) 248 if (fd >= 0)
256 { 249 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 250 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd); 251 close (fd);
259 } 252 }
260# endif 253# endif
254
261 /* ---------------------------------------- */ 255 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 256 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
264 if (fd >= 0) 257 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */ 258 close (fd); /* ouch: still have controlling tty */
259
266 /* ---------------------------------------- */ 260 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 261#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 262 /*
269 * Push STREAMS modules: 263 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 264 * ptem: pseudo-terminal hardware emulation module.
… …
284 */ 278 */
285# ifdef HAVE_ISASTREAM 279# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 280 if (isastream (fd_tty) == 1)
287# endif 281# endif
288 { 282 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 283 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 284 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 285 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 286 }
294#endif 287#endif
295 /* ---------------------------------------- */ 288 /* ---------------------------------------- */
296# if defined(TIOCSCTTY) 289# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 290 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY) 291# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else 293# else
303 fd = open (ttydev, O_RDWR); 294 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 295 if (fd >= 0)
306 close (fd); 296 close (fd);
307# endif 297# endif
308 /* ---------------------------------------- */ 298 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 299 fd = open ("/dev/tty", O_WRONLY);
310 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
311 if (fd < 0) 300 if (fd < 0)
312 return -1; /* fatal */ 301 return -1; /* fatal */
313 close (fd); 302 close (fd);
314 /* ---------------------------------------- */ 303 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */ 304#endif /* ! __QNX__ */
318 305
319 return 0; 306 return 0;
320} 307}
308
309#ifndef NO_SETOWNER_TTYDEV
310static struct ttyconf {
311 gid_t gid;
312 mode_t mode;
313
314 ttyconf ()
315 {
316#ifdef TTY_GID_SUPPORT
317 struct group *gr = getgrnam ("tty");
318
319 if (gr)
320 { /* change group ownership of tty to "tty" */
321 mode = S_IRUSR | S_IWUSR | S_IWGRP;
322 gid = gr->gr_gid;
323 }
324 else
325#endif /* TTY_GID_SUPPORT */
326 {
327 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
328 gid = getgid ();
329 }
330 }
331} ttyconf;
332
333void
334rxvt_ptytty::privileges (rxvt_privaction action)
335{
336 if (!name || !*name)
337 return;
338
339 rxvt_privileges (RESTORE);
340
341 if (action == SAVE)
342 {
343# ifndef RESET_TTY_TO_COMMON_DEFAULTS
344 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
345 if (lstat (name, &savestat) < 0) /* you lose out */
346 ;
347 else
348# endif
349 {
350 saved = true;
351 chown (name, getuid (), ttyconf.gid); /* fail silently */
352 chmod (name, ttyconf.mode);
353# ifdef HAVE_REVOKE
354 revoke (name);
355# endif
356 }
357 }
358 else
359 { /* action == RESTORE */
360# ifndef RESET_TTY_TO_COMMON_DEFAULTS
361 if (saved)
362 {
363 chmod (name, savestat.st_mode);
364 chown (name, savestat.st_uid, savestat.st_gid);
365 }
366# else
367 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
368 chown (name, 0, 0);
369# endif
370
371 }
372
373 rxvt_privileges (IGNORE);
374}
375#endif
376
377rxvt_ptytty::rxvt_ptytty ()
378{
379 pty = tty = -1;
380 name = 0;
381#ifndef NO_SETOWNER_TTYDEV
382 saved = false;
383#endif
384}
385
386rxvt_ptytty::~rxvt_ptytty ()
387{
388 put ();
389}
390
391void
392
393rxvt_ptytty::close_tty ()
394{
395 if (tty < 0)
396 return;
397
398 close (tty);
399 tty = -1;
400}
401
402void
403rxvt_ptytty::put ()
404{
405#ifndef NO_SETOWNER_TTYDEV
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 < 0)
454 return;
455
456 struct termios tio;
457
458 if (tcgetattr (pty, &tio) != -1)
459 {
460 tcflag_t new_cflag = tio.c_iflag;
461
462 if (on)
463 new_cflag |= IUTF8;
464 else
465 new_cflag &= ~IUTF8;
466
467 if (new_cflag != tio.c_iflag)
468 {
469 tio.c_iflag = new_cflag;
470 tcsetattr (pty, TCSANOW, &tio);
471 }
472 }
473#endif
474}
475
321/*----------------------- end-of-file (C source) -----------------------*/ 476/*----------------------- end-of-file (C source) -----------------------*/
477

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