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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.6 by pcg, Fri Feb 13 12:16:21 2004 UTC vs.
Revision 1.35 by root, Tue Jan 17 10:19:13 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#include <stdio.h>
30#ifdef HAVE_STDLIB_H
31# include <stdlib.h> 27# include <cstdlib>
32#endif 28# include <cstring>
29
33#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
34# include <sys/types.h> 31# include <sys/types.h>
35#endif 32#endif
36#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
37# include <unistd.h> 34# include <unistd.h>
38#endif 35#endif
39#if defined(HAVE_STRING_H)
40# include <string.h>
41#endif
42#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
43# include <fcntl.h> 37# include <fcntl.h>
44#endif 38#endif
45#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
46# include <sys/ioctl.h> 40# include <sys/ioctl.h>
47#endif 41#endif
48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
49# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
50#endif 44#endif
51 45#ifdef HAVE_ISASTREAM
52#ifdef DEBUG_TTY 46# include <stropts.h>
53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
54#else
55# define D_TTY(x)
56#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>
57 58
58/* ------------------------------------------------------------------------- * 59/* ------------------------------------------------------------------------- *
59 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 60 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
60 * ------------------------------------------------------------------------- */ 61 * ------------------------------------------------------------------------- */
61/* 62/*
62 * Returns pty file descriptor, or -1 on failure 63 * Returns pty file descriptor, or -1 on failure
63 * 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.
64 * 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
65 */ 66 */
66/* EXTPROTO */ 67static int
67int
68rxvt_get_pty (int *fd_tty, const char **ttydev) 68get_pty (int *fd_tty, char **ttydev)
69{ 69{
70 int pfd; 70 int pfd;
71 71
72#ifdef PTYS_ARE_OPENPTY 72#ifdef PTYS_ARE_OPENPTY
73
74 char tty_name[sizeof "/dev/pts/????\0"]; 73 char tty_name[sizeof "/dev/pts/????\0"];
75 74
75 rxvt_privileges(RESTORE);
76 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)
77 { 80 {
78 *ttydev = strdup (tty_name); 81 *ttydev = strdup (tty_name);
79 return pfd; 82 return pfd;
80 } 83 }
81#endif 84#endif
… …
84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 88 if (*ttydev != NULL)
86 return pfd; 89 return pfd;
87#endif 90#endif
88 91
89#ifdef PTYS_ARE_GETPTY
90
91 char *ptydev;
92
93 while ((ptydev = getpty ()) != NULL)
94 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
96 *ttydev = ptydev;
97 return pfd;
98 }
99#endif
100
101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
103 94
104 { 95 {
105# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
106 pfd = getpt (); 97 pfd = getpt();
107# else 98# else
108 99# ifdef PTYS_ARE_POSIX
100 pfd = posix_openpt (O_RDWR);
101# else
109 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 102 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
103# endif
110# endif 104# endif
111 105
112 if (pfd >= 0) 106 if (pfd >= 0)
113 { 107 {
114 if (grantpt (pfd) == 0 /* change slave permissions */ 108 if (grantpt (pfd) == 0 /* change slave permissions */
115 && unlockpt (pfd) == 0) 109 && unlockpt (pfd) == 0)
116 { /* slave now unlocked */ 110 { /* slave now unlocked */
117 *ttydev = ptsname (pfd); /* get slave's name */ 111 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
118 return pfd; 112 return pfd;
119 } 113 }
120 close (pfd); 114 close (pfd);
121 } 115 }
122 } 116 }
… …
124#endif 118#endif
125 119
126#ifdef PTYS_ARE_PTC 120#ifdef PTYS_ARE_PTC
127 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 121 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 { 122 {
129 *ttydev = ttyname (pfd); 123 *ttydev = strdup (ttyname (pfd));
130 return pfd; 124 return pfd;
131 } 125 }
132#endif 126#endif
133 127
134#ifdef PTYS_ARE_CLONE 128#ifdef PTYS_ARE_CLONE
135 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)
136 { 130 {
137 *ttydev = ptsname (pfd); 131 *ttydev = strdup (ptsname (pfd));
138 return pfd; 132 return pfd;
139 } 133 }
140#endif 134#endif
141 135
142#ifdef PTYS_ARE_NUMERIC 136#ifdef PTYS_ARE_NUMERIC
143 { 137 {
144 int idx; 138 int idx;
145 char *c1, *c2; 139 char *c1, *c2;
146 char pty_name[] = "/dev/ptyp???"; 140 char pty_name[] = "/dev/ptyp???";
147 char tty_name[] = "/dev/ttyp???"; 141 char tty_name[] = "/dev/ttyp???";
148 142
149 c1 = & (pty_name[sizeof (pty_name) - 4]); 143 c1 = &(pty_name[sizeof (pty_name) - 4]);
150 c2 = & (tty_name[sizeof (tty_name) - 4]); 144 c2 = &(tty_name[sizeof (tty_name) - 4]);
151 for (idx = 0; idx < 256; idx++) 145 for (idx = 0; idx < 256; idx++)
152 { 146 {
153 sprintf (c1, "%d", idx); 147 sprintf (c1, "%d", idx);
154 sprintf (c2, "%d", idx); 148 sprintf (c2, "%d", idx);
155 if (access (tty_name, F_OK) < 0) 149 if (access (tty_name, F_OK) < 0)
156 { 150 {
157 idx = 256; 151 idx = 256;
158 break; 152 break;
159 } 153 }
154
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 155 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 { 156 {
162 if (access (tty_name, R_OK | W_OK) == 0) 157 if (access (tty_name, R_OK | W_OK) == 0)
163 { 158 {
164 *ttydev = strdup (tty_name); 159 *ttydev = strdup (tty_name);
165 return pfd; 160 return pfd;
166 } 161 }
162
167 close (pfd); 163 close (pfd);
168 } 164 }
169 } 165 }
170 } 166 }
171#endif 167#endif
168
172#ifdef PTYS_ARE_SEARCHED 169#ifdef PTYS_ARE_SEARCHED
173 { 170 {
174 const char *c1, *c2; 171 const char *c1, *c2;
175 char pty_name[] = "/dev/pty??"; 172 char pty_name[] = "/dev/pty??";
176 char tty_name[] = "/dev/tty??"; 173 char tty_name[] = "/dev/tty??";
177 174
178# ifndef PTYCHAR1 175# ifndef PTYCHAR1
179# define PTYCHAR1 "pqrstuvwxyz" 176# define PTYCHAR1 "pqrstuvwxyz"
180# endif 177# endif
181# ifndef PTYCHAR2 178# ifndef PTYCHAR2
… …
195 if (access (tty_name, R_OK | W_OK) == 0) 192 if (access (tty_name, R_OK | W_OK) == 0)
196 { 193 {
197 *ttydev = strdup (tty_name); 194 *ttydev = strdup (tty_name);
198 return pfd; 195 return pfd;
199 } 196 }
197
200 close (pfd); 198 close (pfd);
201 } 199 }
202 } 200 }
203 } 201 }
204 } 202 }
205#endif 203#endif
204
206 return -1; 205 return -1;
207} 206}
208 207
209/*----------------------------------------------------------------------*/ 208/*----------------------------------------------------------------------*/
210/* 209/*
211 * Returns tty file descriptor, or -1 on failure 210 * Returns tty file descriptor, or -1 on failure
212 */ 211 */
213/* EXTPROTO */ 212static int
214int
215rxvt_get_tty (const char *ttydev) 213get_tty (char *ttydev)
216{ 214{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 215 return open (ttydev, O_RDWR | O_NOCTTY, 0);
218} 216}
219 217
220/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
221/* 219/*
222 * 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
223 */ 221 */
224/* EXTPROTO */ 222static int
225int
226rxvt_control_tty (int fd_tty, const char *ttydev) 223control_tty (int fd_tty, const char *ttydev)
227{ 224{
228#ifndef __QNX__ 225#ifndef __QNX__
229 int fd; 226 int fd;
230 227
231 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
232 /* ---------------------------------------- */ 228 /* ---------------------------------------- */
233# ifdef HAVE_SETSID 229# ifdef HAVE_SETSID
234 setsid (); 230 setsid ();
235# endif 231# endif
236# if defined(HAVE_SETPGID) 232# if defined(HAVE_SETPGID)
237 setpgid (0, 0); 233 setpgid (0, 0);
238# elif defined(HAVE_SETPGRP) 234# elif defined(HAVE_SETPGRP)
239 setpgrp (0, 0); 235 setpgrp (0, 0);
240# endif 236# endif
237
241 /* ---------------------------------------- */ 238 /* ---------------------------------------- */
242# ifdef TIOCNOTTY 239# ifdef TIOCNOTTY
243
244 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 240 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
245 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
246 if (fd >= 0) 241 if (fd >= 0)
247 { 242 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 243 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd); 244 close (fd);
250 } 245 }
251# endif 246# endif
247
252 /* ---------------------------------------- */ 248 /* ---------------------------------------- */
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 249 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
255 if (fd >= 0) 250 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */ 251 close (fd); /* ouch: still have controlling tty */
252
257 /* ---------------------------------------- */ 253 /* ---------------------------------------- */
258#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 254#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
259 /* 255 /*
260 * Push STREAMS modules: 256 * Push STREAMS modules:
261 * ptem: pseudo-terminal hardware emulation module. 257 * ptem: pseudo-terminal hardware emulation module.
… …
275 */ 271 */
276# ifdef HAVE_ISASTREAM 272# ifdef HAVE_ISASTREAM
277 if (isastream (fd_tty) == 1) 273 if (isastream (fd_tty) == 1)
278# endif 274# endif
279 { 275 {
280 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
281 ioctl (fd_tty, I_PUSH, "ptem"); 276 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 277 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 278 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 279 }
285#endif 280#endif
286 /* ---------------------------------------- */ 281 /* ---------------------------------------- */
287# if defined(TIOCSCTTY) 282# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 283 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
289 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
290# elif defined(TIOCSETCTTY) 284# elif defined(TIOCSETCTTY)
291 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 285 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
292 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
293# else 286# else
294 fd = open (ttydev, O_RDWR); 287 fd = open (ttydev, O_RDWR);
295 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
296 if (fd >= 0) 288 if (fd >= 0)
297 close (fd); 289 close (fd);
298# endif 290# endif
299 /* ---------------------------------------- */ 291 /* ---------------------------------------- */
300 fd = open ("/dev/tty", O_WRONLY); 292 fd = open ("/dev/tty", O_WRONLY);
301 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
302 if (fd < 0) 293 if (fd < 0)
303 return -1; /* fatal */ 294 return -1; /* fatal */
304 close (fd); 295 close (fd);
305 /* ---------------------------------------- */ 296 /* ---------------------------------------- */
306 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
307 /* ---------------------------------------- */
308#endif /* ! __QNX__ */ 297#endif /* ! __QNX__ */
309 298
310 return 0; 299 return 0;
311} 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#if UTMP_SUPPORT
378 cmd_pid = 0;
379#endif
380}
381
382rxvt_ptytty::~rxvt_ptytty ()
383{
384 logout ();
385 put ();
386}
387
388void
389
390rxvt_ptytty::close_tty ()
391{
392 if (tty < 0)
393 return;
394
395 close (tty);
396 tty = -1;
397}
398
399void
400rxvt_ptytty::put ()
401{
402#ifndef NO_SETOWNER_TTYDEV
403 privileges (RESTORE);
404#endif
405
406 if (pty >= 0) close (pty);
407 close_tty ();
408 free (name);
409
410 pty = tty = -1;
411 name = 0;
412}
413
414bool
415rxvt_ptytty::make_controlling_tty ()
416{
417 return control_tty (tty, name) >= 0;
418}
419
420bool
421rxvt_ptytty::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
446void
447rxvt_ptytty::set_utf8_mode (bool on)
448{
449#ifdef IUTF8
450 if (pty < 0)
451 return;
452
453 struct termios tio;
454
455 if (tcgetattr (pty, &tio) != -1)
456 {
457 tcflag_t new_cflag = tio.c_iflag;
458
459 if (on)
460 new_cflag |= IUTF8;
461 else
462 new_cflag &= ~IUTF8;
463
464 if (new_cflag != tio.c_iflag)
465 {
466 tio.c_iflag = new_cflag;
467 tcsetattr (pty, TCSANOW, &tio);
468 }
469 }
470#endif
471}
472
312/*----------------------- end-of-file (C source) -----------------------*/ 473/*----------------------- end-of-file (C source) -----------------------*/
474

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