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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 1.16 by root, Sun Aug 15 03:30:04 2004 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
52#if defined( __FreeBSD__)
53// better do this via configure, but....
54# include <libutil.h>
55#endif
56
57#include <cstdio>
58#include <grp.h>
63 59
64/* ------------------------------------------------------------------------- * 60/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 61 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 62 * ------------------------------------------------------------------------- */
67/* 63/*
68 * Returns pty file descriptor, or -1 on failure 64 * Returns pty file descriptor, or -1 on failure
69 * If successful, ttydev is set to the name of the slave device. 65 * 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 66 * fd_tty _may_ also be set to an open fd to the slave device
71 */ 67 */
72/* EXTPROTO */ 68static int
73int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 69get_pty (int *fd_tty, char **ttydev)
75{ 70{
76 int pfd; 71 int pfd;
77 72
78#ifdef PTYS_ARE_OPENPTY 73#ifdef PTYS_ARE_OPENPTY
79
80 char tty_name[sizeof "/dev/pts/????\0"]; 74 char tty_name[sizeof "/dev/pts/????\0"];
81 75
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
83 { 77 {
84 *ttydev = strdup (tty_name); 78 *ttydev = strdup (tty_name);
… …
109 103
110 { 104 {
111# ifdef PTYS_ARE_GETPT 105# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 106 pfd = getpt ();
113# else 107# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 108 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
116# endif 109# endif
117 110
118 if (pfd >= 0) 111 if (pfd >= 0)
119 { 112 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 113 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 114 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 115 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 117 return pfd;
125 } 118 }
126 close (pfd); 119 close (pfd);
127 } 120 }
128 } 121 }
… …
130#endif 123#endif
131 124
132#ifdef PTYS_ARE_PTC 125#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 126 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 127 {
135 *ttydev = ttyname (pfd); 128 *ttydev = strdup (ttyname (pfd));
136 return pfd; 129 return pfd;
137 } 130 }
138#endif 131#endif
139 132
140#ifdef PTYS_ARE_CLONE 133#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 135 {
143 *ttydev = ptsname (pfd); 136 *ttydev = strdup (ptsname (pfd));
144 return pfd; 137 return pfd;
145 } 138 }
146#endif 139#endif
147 140
148#ifdef PTYS_ARE_NUMERIC 141#ifdef PTYS_ARE_NUMERIC
149 { 142 {
150 int idx; 143 int idx;
151 char *c1, *c2; 144 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 145 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 146 char tty_name[] = "/dev/ttyp???";
154 147
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 148 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 149 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 150 for (idx = 0; idx < 256; idx++)
158 { 151 {
159 sprintf (c1, "%d", idx); 152 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 153 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 154 if (access (tty_name, F_OK) < 0)
162 { 155 {
163 idx = 256; 156 idx = 256;
164 break; 157 break;
165 } 158 }
159
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 161 {
168 if (access (tty_name, R_OK | W_OK) == 0) 162 if (access (tty_name, R_OK | W_OK) == 0)
169 { 163 {
170 *ttydev = strdup (tty_name); 164 *ttydev = strdup (tty_name);
171 return pfd; 165 return pfd;
172 } 166 }
167
173 close (pfd); 168 close (pfd);
174 } 169 }
175 } 170 }
176 } 171 }
177#endif 172#endif
173
178#ifdef PTYS_ARE_SEARCHED 174#ifdef PTYS_ARE_SEARCHED
179 { 175 {
180 const char *c1, *c2; 176 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 177 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 178 char tty_name[] = "/dev/tty??";
183 179
184# ifndef PTYCHAR1 180# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 181# define PTYCHAR1 "pqrstuvwxyz"
186# endif 182# endif
187# ifndef PTYCHAR2 183# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 197 if (access (tty_name, R_OK | W_OK) == 0)
202 { 198 {
203 *ttydev = strdup (tty_name); 199 *ttydev = strdup (tty_name);
204 return pfd; 200 return pfd;
205 } 201 }
202
206 close (pfd); 203 close (pfd);
207 } 204 }
208 } 205 }
209 } 206 }
210 } 207 }
211#endif 208#endif
209
212 return -1; 210 return -1;
213} 211}
214 212
215/*----------------------------------------------------------------------*/ 213/*----------------------------------------------------------------------*/
216/* 214/*
217 * Returns tty file descriptor, or -1 on failure 215 * Returns tty file descriptor, or -1 on failure
218 */ 216 */
219/* EXTPROTO */ 217static int
220int
221rxvt_get_tty (const char *ttydev) 218get_tty (char *ttydev)
222{ 219{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 220 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 221}
225 222
226/*----------------------------------------------------------------------*/ 223/*----------------------------------------------------------------------*/
227/* 224/*
228 * Make our tty a controlling tty so that /dev/tty points to us 225 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 226 */
230/* EXTPROTO */ 227static int
231int
232rxvt_control_tty (int fd_tty, const char *ttydev) 228control_tty (int fd_tty, const char *ttydev)
233{ 229{
234#ifndef __QNX__ 230#ifndef __QNX__
235 int fd; 231 int fd;
236 232
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 233 /* ---------------------------------------- */
239# ifdef HAVE_SETSID 234# ifdef HAVE_SETSID
240 setsid (); 235 setsid ();
241# endif 236# endif
242# if defined(HAVE_SETPGID) 237# if defined(HAVE_SETPGID)
243 setpgid (0, 0); 238 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP) 239# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0); 240 setpgrp (0, 0);
246# endif 241# endif
242
247 /* ---------------------------------------- */ 243 /* ---------------------------------------- */
248# ifdef TIOCNOTTY 244# ifdef TIOCNOTTY
249
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 245 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) 246 if (fd >= 0)
253 { 247 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd); 249 close (fd);
256 } 250 }
257# endif 251# endif
252
258 /* ---------------------------------------- */ 253 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 254 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) 255 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */ 256 close (fd); /* ouch: still have controlling tty */
257
263 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 260 /*
266 * Push STREAMS modules: 261 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 262 * ptem: pseudo-terminal hardware emulation module.
… …
281 */ 276 */
282# ifdef HAVE_ISASTREAM 277# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 278 if (isastream (fd_tty) == 1)
284# endif 279# endif
285 { 280 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 281 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 282 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 283 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 284 }
291#endif 285#endif
292 /* ---------------------------------------- */ 286 /* ---------------------------------------- */
293# if defined(TIOCSCTTY) 287# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 288 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY) 289# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 291# else
300 fd = open (ttydev, O_RDWR); 292 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 293 if (fd >= 0)
303 close (fd); 294 close (fd);
304# endif 295# endif
305 /* ---------------------------------------- */ 296 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 297 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) 298 if (fd < 0)
309 return -1; /* fatal */ 299 return -1; /* fatal */
310 close (fd); 300 close (fd);
311 /* ---------------------------------------- */ 301 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */ 302#endif /* ! __QNX__ */
315 303
316 return 0; 304 return 0;
317} 305}
306
307#ifndef NO_SETOWNER_TTYDEV
308static struct ttyconf {
309 gid_t gid;
310 mode_t mode;
311
312 ttyconf ()
313 {
314#ifdef TTY_GID_SUPPORT
315 struct group *gr = getgrnam ("tty");
316
317 if (gr)
318 { /* change group ownership of tty to "tty" */
319 mode = S_IRUSR | S_IWUSR | S_IWGRP;
320 gid = gr->gr_gid;
321 }
322 else
323#endif /* TTY_GID_SUPPORT */
324 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid ();
327 }
328 }
329} ttyconf;
330
331void
332rxvt_ptytty::privileges (rxvt_privaction action)
333{
334 rxvt_privileges (RESTORE);
335
336 if (action == SAVE)
337 {
338 //next_tty_action = RESTORE;
339# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341 if (lstat (name, &savestat) < 0) /* you lose out */
342 ;//next_tty_action = IGNORE;
343 else
344# endif
345
346 {
347 chown (name, getuid (), ttyconf.gid); /* fail silently */
348 chmod (name, ttyconf.mode);
349# ifdef HAVE_REVOKE
350 revoke (name);
351# endif
352
353 }
354 }
355 else
356 { /* action == RESTORE */
357 //next_tty_action = IGNORE;
358# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359 chmod (name, savestat.st_mode);
360 chown (name, savestat.st_uid, savestat.st_gid);
361# else
362 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
363 chown (name, 0, 0);
364# endif
365
366 }
367
368 rxvt_privileges (IGNORE);
369}
370#endif
371
372rxvt_ptytty::rxvt_ptytty ()
373{
374 pty = tty = -1;
375 name = 0;
376}
377
378rxvt_ptytty::~rxvt_ptytty ()
379{
380 put ();
381}
382
383void
384
385rxvt_ptytty::close_tty ()
386{
387 if (tty >= 0) close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 if (tty >= 0)
396 privileges (RESTORE);
397#endif
398
399 if (pty >= 0) close (pty);
400 close_tty ();
401 free (name);
402
403 pty = tty = -1;
404 name = 0;
405}
406
407bool
408rxvt_ptytty::make_controlling_tty ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{
416 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0)
418 return false;
419
420 fcntl (pty, F_SETFL, O_NONBLOCK);
421
422 /* get slave (tty) */
423 if (tty < 0)
424 {
425#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE);
427#endif
428
429 if ((tty = get_tty (name)) < 0)
430 {
431 put ();
432 return false;
433 }
434 }
435
436 return true;
437}
438
318/*----------------------- end-of-file (C source) -----------------------*/ 439/*----------------------- end-of-file (C source) -----------------------*/
440

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