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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 1.34 by ayin, Tue Jan 17 08:54:33 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
… …
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
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
99
100 char *ptydev;
101
102 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
105 *ttydev = ptydev;
106 return pfd;
107 }
108#endif
109
110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
112 94
113 { 95 {
114# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 97 pfd = getpt();
116# else 98# else
117 99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR);
101# else
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
103# endif
119# endif 104# endif
120 105
121 if (pfd >= 0) 106 if (pfd >= 0)
122 { 107 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 108 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 109 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 110 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 112 return pfd;
128 } 113 }
129 close (pfd); 114 close (pfd);
130 } 115 }
131 } 116 }
… …
133#endif 118#endif
134 119
135#ifdef PTYS_ARE_PTC 120#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 122 {
138 *ttydev = ttyname (pfd); 123 *ttydev = strdup (ttyname (pfd));
139 return pfd; 124 return pfd;
140 } 125 }
141#endif 126#endif
142 127
143#ifdef PTYS_ARE_CLONE 128#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 129 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 130 {
146 *ttydev = ptsname (pfd); 131 *ttydev = strdup (ptsname (pfd));
147 return pfd; 132 return pfd;
148 } 133 }
149#endif 134#endif
150 135
151#ifdef PTYS_ARE_NUMERIC 136#ifdef PTYS_ARE_NUMERIC
152 { 137 {
153 int idx; 138 int idx;
154 char *c1, *c2; 139 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 140 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 141 char tty_name[] = "/dev/ttyp???";
157 142
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 143 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 144 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 145 for (idx = 0; idx < 256; idx++)
161 { 146 {
162 sprintf (c1, "%d", idx); 147 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 148 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 149 if (access (tty_name, F_OK) < 0)
165 { 150 {
166 idx = 256; 151 idx = 256;
167 break; 152 break;
168 } 153 }
154
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 156 {
171 if (access (tty_name, R_OK | W_OK) == 0) 157 if (access (tty_name, R_OK | W_OK) == 0)
172 { 158 {
173 *ttydev = strdup (tty_name); 159 *ttydev = strdup (tty_name);
174 return pfd; 160 return pfd;
175 } 161 }
162
176 close (pfd); 163 close (pfd);
177 } 164 }
178 } 165 }
179 } 166 }
180#endif 167#endif
168
181#ifdef PTYS_ARE_SEARCHED 169#ifdef PTYS_ARE_SEARCHED
182 { 170 {
183 const char *c1, *c2; 171 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 172 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 173 char tty_name[] = "/dev/tty??";
186 174
187# ifndef PTYCHAR1 175# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 176# define PTYCHAR1 "pqrstuvwxyz"
189# endif 177# endif
190# ifndef PTYCHAR2 178# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 192 if (access (tty_name, R_OK | W_OK) == 0)
205 { 193 {
206 *ttydev = strdup (tty_name); 194 *ttydev = strdup (tty_name);
207 return pfd; 195 return pfd;
208 } 196 }
197
209 close (pfd); 198 close (pfd);
210 } 199 }
211 } 200 }
212 } 201 }
213 } 202 }
214#endif 203#endif
204
215 return -1; 205 return -1;
216} 206}
217 207
218/*----------------------------------------------------------------------*/ 208/*----------------------------------------------------------------------*/
219/* 209/*
220 * Returns tty file descriptor, or -1 on failure 210 * Returns tty file descriptor, or -1 on failure
221 */ 211 */
222/* EXTPROTO */ 212static int
223int
224rxvt_get_tty (const char *ttydev) 213get_tty (char *ttydev)
225{ 214{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 215 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 216}
228 217
229/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
230/* 219/*
231 * Make our tty a controlling tty so that /dev/tty points to us 220 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 221 */
233/* EXTPROTO */ 222static int
234int
235rxvt_control_tty (int fd_tty, const char *ttydev) 223control_tty (int fd_tty, const char *ttydev)
236{ 224{
237#ifndef __QNX__ 225#ifndef __QNX__
238 int fd; 226 int fd;
239 227
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 228 /* ---------------------------------------- */
242# ifdef HAVE_SETSID 229# ifdef HAVE_SETSID
243 setsid (); 230 setsid ();
244# endif 231# endif
245# if defined(HAVE_SETPGID) 232# if defined(HAVE_SETPGID)
246 setpgid (0, 0); 233 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP) 234# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0); 235 setpgrp (0, 0);
249# endif 236# endif
237
250 /* ---------------------------------------- */ 238 /* ---------------------------------------- */
251# ifdef TIOCNOTTY 239# ifdef TIOCNOTTY
252
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 240 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) 241 if (fd >= 0)
256 { 242 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 243 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd); 244 close (fd);
259 } 245 }
260# endif 246# endif
247
261 /* ---------------------------------------- */ 248 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 249 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) 250 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */ 251 close (fd); /* ouch: still have controlling tty */
252
266 /* ---------------------------------------- */ 253 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 254#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 255 /*
269 * Push STREAMS modules: 256 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 257 * ptem: pseudo-terminal hardware emulation module.
… …
284 */ 271 */
285# ifdef HAVE_ISASTREAM 272# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 273 if (isastream (fd_tty) == 1)
287# endif 274# endif
288 { 275 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 276 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 277 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 278 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 279 }
294#endif 280#endif
295 /* ---------------------------------------- */ 281 /* ---------------------------------------- */
296# if defined(TIOCSCTTY) 282# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 283 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY) 284# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 285 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else 286# else
303 fd = open (ttydev, O_RDWR); 287 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 288 if (fd >= 0)
306 close (fd); 289 close (fd);
307# endif 290# endif
308 /* ---------------------------------------- */ 291 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 292 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) 293 if (fd < 0)
312 return -1; /* fatal */ 294 return -1; /* fatal */
313 close (fd); 295 close (fd);
314 /* ---------------------------------------- */ 296 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */ 297#endif /* ! __QNX__ */
318 298
319 return 0; 299 return 0;
320} 300}
301
302#ifndef NO_SETOWNER_TTYDEV
303static struct ttyconf {
304 gid_t gid;
305 mode_t mode;
306
307 ttyconf ()
308 {
309#ifdef TTY_GID_SUPPORT
310 struct group *gr = getgrnam ("tty");
311
312 if (gr)
313 { /* change group ownership of tty to "tty" */
314 mode = S_IRUSR | S_IWUSR | S_IWGRP;
315 gid = gr->gr_gid;
316 }
317 else
318#endif /* TTY_GID_SUPPORT */
319 {
320 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
321 gid = getgid ();
322 }
323 }
324} ttyconf;
325
326void
327rxvt_ptytty::privileges (rxvt_privaction action)
328{
329 if (!name || !*name)
330 return;
331
332 rxvt_privileges (RESTORE);
333
334 if (action == SAVE)
335 {
336# ifndef RESET_TTY_TO_COMMON_DEFAULTS
337 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
338 if (lstat (name, &savestat) < 0) /* you lose out */
339 ;
340 else
341# endif
342 {
343 saved = true;
344 chown (name, getuid (), ttyconf.gid); /* fail silently */
345 chmod (name, ttyconf.mode);
346# ifdef HAVE_REVOKE
347 revoke (name);
348# endif
349 }
350 }
351 else
352 { /* action == RESTORE */
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 if (saved)
355 {
356 chmod (name, savestat.st_mode);
357 chown (name, savestat.st_uid, savestat.st_gid);
358 }
359# else
360 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
361 chown (name, 0, 0);
362# endif
363
364 }
365
366 rxvt_privileges (IGNORE);
367}
368#endif
369
370rxvt_ptytty::rxvt_ptytty ()
371{
372 pty = tty = -1;
373 name = 0;
374#ifndef NO_SETOWNER_TTYDEV
375 saved = false;
376#endif
377}
378
379rxvt_ptytty::~rxvt_ptytty ()
380{
381 put ();
382}
383
384void
385
386rxvt_ptytty::close_tty ()
387{
388 if (tty < 0)
389 return;
390
391 close (tty);
392 tty = -1;
393}
394
395void
396rxvt_ptytty::put ()
397{
398#ifndef NO_SETOWNER_TTYDEV
399 privileges (RESTORE);
400#endif
401
402 if (pty >= 0) close (pty);
403 close_tty ();
404 free (name);
405
406 pty = tty = -1;
407 name = 0;
408}
409
410bool
411rxvt_ptytty::make_controlling_tty ()
412{
413 return control_tty (tty, name) >= 0;
414}
415
416bool
417rxvt_ptytty::get ()
418{
419 /* get master (pty) */
420 if ((pty = get_pty (&tty, &name)) < 0)
421 return false;
422
423 fcntl (pty, F_SETFL, O_NONBLOCK);
424
425 /* get slave (tty) */
426 if (tty < 0)
427 {
428#ifndef NO_SETOWNER_TTYDEV
429 privileges (SAVE);
430#endif
431
432 if ((tty = get_tty (name)) < 0)
433 {
434 put ();
435 return false;
436 }
437 }
438
439 return true;
440}
441
442void
443rxvt_ptytty::set_utf8_mode (bool on)
444{
445#ifdef IUTF8
446 if (pty < 0)
447 return;
448
449 struct termios tio;
450
451 if (tcgetattr (pty, &tio) != -1)
452 {
453 tcflag_t new_cflag = tio.c_iflag;
454
455 if (on)
456 new_cflag |= IUTF8;
457 else
458 new_cflag &= ~IUTF8;
459
460 if (new_cflag != tio.c_iflag)
461 {
462 tio.c_iflag = new_cflag;
463 tcsetattr (pty, TCSANOW, &tio);
464 }
465 }
466#endif
467}
468
321/*----------------------- end-of-file (C source) -----------------------*/ 469/*----------------------- end-of-file (C source) -----------------------*/
470

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