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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 1.28 by root, Wed Jan 4 03:02:01 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 <cstdio>
36#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
37# include <cstdlib> 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>
… …
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#ifdef HAVE_ISASTREAM 48#ifdef HAVE_ISASTREAM
58# include <stropts.h> 49# include <stropts.h>
59#endif 50#endif
60 51#ifdef HAVE_PTY_H
61#ifdef DEBUG_TTY 52# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
63#else
64# define D_TTY(x)
65#endif 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>
66 64
67/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
70/* 68/*
71 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
72 * 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.
73 * 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
74 */ 72 */
75/* EXTPROTO */ 73static int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
78{ 75{
79 int pfd; 76 int pfd;
80 77
81#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
82
83 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
84 80
81 rxvt_privileges(RESTORE);
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges(IGNORE);
84
85 if (res != -1)
86 { 86 {
87 *ttydev = strdup (tty_name); 87 *ttydev = strdup (tty_name);
88 return pfd; 88 return pfd;
89 } 89 }
90#endif 90#endif
… …
94 if (*ttydev != NULL) 94 if (*ttydev != NULL)
95 return pfd; 95 return pfd;
96#endif 96#endif
97 97
98#ifdef PTYS_ARE_GETPTY 98#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev; 99 char *ptydev;
101 100
102 while ((ptydev = getpty ()) != NULL) 101 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 { 103 {
… …
112 111
113 { 112 {
114# ifdef PTYS_ARE_GETPT 113# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 114 pfd = getpt ();
116# else 115# else
117
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
119# endif 117# endif
120 118
121 if (pfd >= 0) 119 if (pfd >= 0)
122 { 120 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 121 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 122 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 123 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 125 return pfd;
128 } 126 }
129 close (pfd); 127 close (pfd);
130 } 128 }
131 } 129 }
… …
133#endif 131#endif
134 132
135#ifdef PTYS_ARE_PTC 133#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 135 {
138 *ttydev = ttyname (pfd); 136 *ttydev = strdup (ttyname (pfd));
139 return pfd; 137 return pfd;
140 } 138 }
141#endif 139#endif
142 140
143#ifdef PTYS_ARE_CLONE 141#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 142 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 143 {
146 *ttydev = ptsname (pfd); 144 *ttydev = strdup (ptsname (pfd));
147 return pfd; 145 return pfd;
148 } 146 }
149#endif 147#endif
150 148
151#ifdef PTYS_ARE_NUMERIC 149#ifdef PTYS_ARE_NUMERIC
152 { 150 {
153 int idx; 151 int idx;
154 char *c1, *c2; 152 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 153 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 154 char tty_name[] = "/dev/ttyp???";
157 155
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 156 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 157 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 158 for (idx = 0; idx < 256; idx++)
161 { 159 {
162 sprintf (c1, "%d", idx); 160 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 161 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 162 if (access (tty_name, F_OK) < 0)
165 { 163 {
166 idx = 256; 164 idx = 256;
167 break; 165 break;
168 } 166 }
167
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 169 {
171 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
172 { 171 {
173 *ttydev = strdup (tty_name); 172 *ttydev = strdup (tty_name);
174 return pfd; 173 return pfd;
175 } 174 }
175
176 close (pfd); 176 close (pfd);
177 } 177 }
178 } 178 }
179 } 179 }
180#endif 180#endif
181
181#ifdef PTYS_ARE_SEARCHED 182#ifdef PTYS_ARE_SEARCHED
182 { 183 {
183 const char *c1, *c2; 184 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 185 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 186 char tty_name[] = "/dev/tty??";
186 187
187# ifndef PTYCHAR1 188# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 189# define PTYCHAR1 "pqrstuvwxyz"
189# endif 190# endif
190# ifndef PTYCHAR2 191# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 205 if (access (tty_name, R_OK | W_OK) == 0)
205 { 206 {
206 *ttydev = strdup (tty_name); 207 *ttydev = strdup (tty_name);
207 return pfd; 208 return pfd;
208 } 209 }
210
209 close (pfd); 211 close (pfd);
210 } 212 }
211 } 213 }
212 } 214 }
213 } 215 }
214#endif 216#endif
217
215 return -1; 218 return -1;
216} 219}
217 220
218/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
219/* 222/*
220 * Returns tty file descriptor, or -1 on failure 223 * Returns tty file descriptor, or -1 on failure
221 */ 224 */
222/* EXTPROTO */ 225static int
223int
224rxvt_get_tty (const char *ttydev) 226get_tty (char *ttydev)
225{ 227{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 228 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 229}
228 230
229/*----------------------------------------------------------------------*/ 231/*----------------------------------------------------------------------*/
230/* 232/*
231 * Make our tty a controlling tty so that /dev/tty points to us 233 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 234 */
233/* EXTPROTO */ 235static int
234int
235rxvt_control_tty (int fd_tty, const char *ttydev) 236control_tty (int fd_tty, const char *ttydev)
236{ 237{
237#ifndef __QNX__ 238#ifndef __QNX__
238 int fd; 239 int fd;
239 240
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 241 /* ---------------------------------------- */
242# ifdef HAVE_SETSID 242# ifdef HAVE_SETSID
243 setsid (); 243 setsid ();
244# endif 244# endif
245# if defined(HAVE_SETPGID) 245# if defined(HAVE_SETPGID)
246 setpgid (0, 0); 246 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP) 247# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0); 248 setpgrp (0, 0);
249# endif 249# endif
250
250 /* ---------------------------------------- */ 251 /* ---------------------------------------- */
251# ifdef TIOCNOTTY 252# ifdef TIOCNOTTY
252
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 253 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) 254 if (fd >= 0)
256 { 255 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd); 257 close (fd);
259 } 258 }
260# endif 259# endif
260
261 /* ---------------------------------------- */ 261 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 262 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) 263 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */ 264 close (fd); /* ouch: still have controlling tty */
265
266 /* ---------------------------------------- */ 266 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 268 /*
269 * Push STREAMS modules: 269 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 270 * ptem: pseudo-terminal hardware emulation module.
… …
284 */ 284 */
285# ifdef HAVE_ISASTREAM 285# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 286 if (isastream (fd_tty) == 1)
287# endif 287# endif
288 { 288 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 289 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 290 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 291 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 292 }
294#endif 293#endif
295 /* ---------------------------------------- */ 294 /* ---------------------------------------- */
296# if defined(TIOCSCTTY) 295# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 296 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY) 297# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else 299# else
303 fd = open (ttydev, O_RDWR); 300 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 301 if (fd >= 0)
306 close (fd); 302 close (fd);
307# endif 303# endif
308 /* ---------------------------------------- */ 304 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 305 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) 306 if (fd < 0)
312 return -1; /* fatal */ 307 return -1; /* fatal */
313 close (fd); 308 close (fd);
314 /* ---------------------------------------- */ 309 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */ 310#endif /* ! __QNX__ */
318 311
319 return 0; 312 return 0;
320} 313}
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf {
317 gid_t gid;
318 mode_t mode;
319
320 ttyconf ()
321 {
322#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty");
324
325 if (gr)
326 { /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid;
329 }
330 else
331#endif /* TTY_GID_SUPPORT */
332 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid ();
335 }
336 }
337} ttyconf;
338
339void
340rxvt_ptytty::privileges (rxvt_privaction action)
341{
342 if (!name || !*name)
343 return;
344
345 rxvt_privileges (RESTORE);
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 }
364 else
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0);
375# endif
376
377 }
378
379 rxvt_privileges (IGNORE);
380}
381#endif
382
383rxvt_ptytty::rxvt_ptytty ()
384{
385 pty = tty = -1;
386 name = 0;
387#ifndef NO_SETOWNER_TTYDEV
388 saved = false;
389#endif
390}
391
392rxvt_ptytty::~rxvt_ptytty ()
393{
394 put ();
395}
396
397void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty >= 0) close (tty);
402 tty = -1;
403}
404
405void
406rxvt_ptytty::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::make_controlling_tty ()
422{
423 return control_tty (tty, name) >= 0;
424}
425
426bool
427rxvt_ptytty::get ()
428{
429 /* get master (pty) */
430 if ((pty = get_pty (&tty, &name)) < 0)
431 return false;
432
433 fcntl (pty, F_SETFL, O_NONBLOCK);
434
435 /* get slave (tty) */
436 if (tty < 0)
437 {
438#ifndef NO_SETOWNER_TTYDEV
439 privileges (SAVE);
440#endif
441
442 if ((tty = get_tty (name)) < 0)
443 {
444 put ();
445 return false;
446 }
447 }
448
449 return true;
450}
451
452void
453rxvt_ptytty::set_utf8_mode (bool on)
454{
455#ifdef IUTF8
456 if (pty != -1)
457 {
458 struct termios tio;
459
460 if (tcgetattr (pty, &tio) != -1)
461 {
462 tcflag_t new_cflag = tio.c_iflag;
463
464 if (on)
465 new_cflag |= IUTF8;
466 else
467 new_cflag &= ~IUTF8;
468
469 if (new_cflag != tio.c_iflag)
470 {
471 tio.c_iflag = new_cflag;
472 tcsetattr (pty, TCSANOW, &tio);
473 }
474 }
475 }
476#endif
477}
478
321/*----------------------- end-of-file (C source) -----------------------*/ 479/*----------------------- end-of-file (C source) -----------------------*/
480

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