ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 UTC vs.
Revision 1.53 by ayin, Sat Jan 21 18:15:26 2006 UTC

… …
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h" 25#include "rxvt.h"
26 26
27# include <cstdlib> 27#include <cstdlib>
28# include <cstring> 28#include <cstring>
29 29
30#ifdef HAVE_SYS_TYPES_H
31# include <sys/types.h> 30#include <sys/types.h>
32#endif 31#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 32#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 33#include <fcntl.h>
38#endif 34
39#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 36# include <sys/ioctl.h>
41#endif 37#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 38#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
44#endif 40#endif
45#ifdef HAVE_ISASTREAM 41#ifdef HAVE_ISASTREAM
46# include <stropts.h> 42# include <stropts.h>
47#endif 43#endif
… …
50#elif defined(HAVE_LIBUTIL_H) 46#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 47# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 48#elif defined(HAVE_UTIL_H)
53# include <util.h> 49# include <util.h>
54#endif 50#endif
51#ifdef TTY_GID_SUPPORT
52#include <grp.h>
53#endif
55 54
56#include <cstdio> 55#include <cstdio>
57#include <grp.h>
58 56
57#include "rxvtutil.h"
58#include "fdpass.h"
59#include "ptytty.h" 59#include "ptytty.h"
60 60
61///////////////////////////////////////////////////////////////////////////// 61/////////////////////////////////////////////////////////////////////////////
62 62
63/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
… …
66/* 66/*
67 * Returns pty file descriptor, or -1 on failure 67 * Returns pty file descriptor, or -1 on failure
68 * If successful, ttydev is set to the name of the slave device. 68 * If successful, ttydev is set to the name of the slave device.
69 * fd_tty _may_ also be set to an open fd to the slave device 69 * fd_tty _may_ also be set to an open fd to the slave device
70 */ 70 */
71#if defined(UNIX98_PTY)
71static int 72static int
72get_pty (int *fd_tty, char **ttydev) 73get_pty (int *fd_tty, char **ttydev)
73{ 74{
74 int pfd; 75 int pfd;
75 76
76#ifdef PTYS_ARE_OPENPTY 77# if defined(HAVE_GETPT)
77 char tty_name[sizeof "/dev/pts/????\0"]; 78 pfd = getpt();
79# elif defined(HAVE_POSIX_OPENPT)
80 pfd = posix_openpt (O_RDWR);
81# else
82 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
83# endif
84 if (pfd >= 0)
85 {
86 if (grantpt (pfd) == 0 /* change slave permissions */
87 && unlockpt (pfd) == 0)
88 { /* slave now unlocked */
89 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
90 return pfd;
91 }
78 92
79 rxvt_privileges(RESTORE); 93 close (pfd);
94 }
95
96 return -1;
97}
98#elif defined(HAVE_OPENPTY)
99static int
100get_pty (int *fd_tty, char **ttydev)
101{
102 int pfd;
103 int res;
104 char tty_name[32];
105
80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1) 107 if (res != -1)
84 { 108 {
85 *ttydev = strdup (tty_name); 109 *ttydev = strdup (tty_name);
86 return pfd; 110 return pfd;
87 } 111 }
88#endif
89 112
90#ifdef PTYS_ARE__GETPTY 113 return -1;
114}
115#elif defined(HAVE__GETPTY)
116static int
117get_pty (int *fd_tty, char **ttydev)
118{
119 int pfd;
120
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 121 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL) 122 if (*ttydev != NULL)
93 return pfd; 123 return pfd;
94#endif
95 124
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 125 return -1;
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 126}
127#elif defined(HAVE_DEV_PTC)
128static int
129get_pty (int *fd_tty, char **ttydev)
130{
131 int pfd;
98 132
99 {
100# ifdef PTYS_ARE_GETPT
101 pfd = getpt();
102# else
103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR);
105# else
106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
107# endif
108# endif
109
110 if (pfd >= 0)
111 {
112 if (grantpt (pfd) == 0 /* change slave permissions */
113 && unlockpt (pfd) == 0)
114 { /* slave now unlocked */
115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
116 return pfd;
117 }
118 close (pfd);
119 }
120 }
121# endif
122#endif
123
124#ifdef PTYS_ARE_PTC
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
126 { 134 {
127 *ttydev = strdup (ttyname (pfd)); 135 *ttydev = strdup (ttyname (pfd));
128 return pfd; 136 return pfd;
129 } 137 }
130#endif
131 138
132#ifdef PTYS_ARE_CLONE 139 return -1;
140}
141#elif defined(HAVE_DEV_CLONE)
142static int
143get_pty (int *fd_tty, char **ttydev)
144{
145 int pfd;
146
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 148 {
135 *ttydev = strdup (ptsname (pfd)); 149 *ttydev = strdup (ptsname (pfd));
136 return pfd; 150 return pfd;
137 } 151 }
138#endif
139
140#ifdef PTYS_ARE_NUMERIC
141 {
142 int idx;
143 char *c1, *c2;
144 char pty_name[] = "/dev/ptyp???";
145 char tty_name[] = "/dev/ttyp???";
146
147 c1 = &(pty_name[sizeof (pty_name) - 4]);
148 c2 = &(tty_name[sizeof (tty_name) - 4]);
149 for (idx = 0; idx < 256; idx++)
150 {
151 sprintf (c1, "%d", idx);
152 sprintf (c2, "%d", idx);
153 if (access (tty_name, F_OK) < 0)
154 {
155 idx = 256;
156 break;
157 }
158
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
160 {
161 if (access (tty_name, R_OK | W_OK) == 0)
162 {
163 *ttydev = strdup (tty_name);
164 return pfd;
165 }
166
167 close (pfd);
168 }
169 }
170 }
171#endif
172
173#ifdef PTYS_ARE_SEARCHED
174 {
175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??";
178
179# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz"
181# endif
182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef"
184# endif
185
186 for (c1 = PTYCHAR1; *c1; c1++)
187 {
188 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++)
191 {
192 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 {
196 if (access (tty_name, R_OK | W_OK) == 0)
197 {
198 *ttydev = strdup (tty_name);
199 return pfd;
200 }
201
202 close (pfd);
203 }
204 }
205 }
206 }
207#endif
208 152
209 return -1; 153 return -1;
210} 154}
155#else
156/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
157static int
158get_pty (int *fd_tty, char **ttydev)
159{
160 int pfd;
161 int i;
162 char pty_name[32];
163 char tty_name[32];
164 const char *majors = "pqrstuvwxyzabcde";
165 const char *minors = "0123456789abcdef";
166 for (i = 0; i < 256; i++)
167 {
168 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
169 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
171 {
172 snprintf(pty_name, 32, "/dev/ptyp%d", i);
173 snprintf(tty_name, 32, "/dev/ttyp%d", i);
174 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
175 continue;
176 }
177 if (access (tty_name, R_OK | W_OK) == 0)
178 {
179 *ttydev = strdup (tty_name);
180 return pfd;
181 }
182
183 close (pfd);
184 }
185}
186#endif
211 187
212/*----------------------------------------------------------------------*/ 188/*----------------------------------------------------------------------*/
213/* 189/*
214 * Returns tty file descriptor, or -1 on failure 190 * Returns tty file descriptor, or -1 on failure
215 */ 191 */
… …
224 * Make our tty a controlling tty so that /dev/tty points to us 200 * Make our tty a controlling tty so that /dev/tty points to us
225 */ 201 */
226static int 202static int
227control_tty (int fd_tty) 203control_tty (int fd_tty)
228{ 204{
229 int fd;
230
231 /* ---------------------------------------- */
232 setsid (); 205 setsid ();
233 206
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 207#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
236 /* 208 /*
237 * Push STREAMS modules: 209 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 210 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 211 * ldterm: standard terminal line discipline.
240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 212 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
248 * documentation is really unclear about whether it is any close () on 220 * documentation is really unclear about whether it is any close () on
249 * the master side or the last close () - i.e. a proper STREAMS dismantling 221 * the master side or the last close () - i.e. a proper STREAMS dismantling
250 * close () - on the master side which causes a hang up to be sent 222 * close () - on the master side which causes a hang up to be sent
251 * through - Geoff Wing 223 * through - Geoff Wing
252 */ 224 */
253# ifdef HAVE_ISASTREAM 225# ifdef HAVE_ISASTREAM
254 if (isastream (fd_tty) == 1) 226 if (isastream (fd_tty) == 1)
255# endif 227# endif
256 { 228 {
257 ioctl (fd_tty, I_PUSH, "ptem"); 229 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 230 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 231 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 232 }
261# endif 233#endif
262 /* ---------------------------------------- */ 234
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 235 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 236
265 fd = open ("/dev/tty", O_WRONLY); 237 int fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 238 if (fd < 0)
267 return -1; /* fatal */ 239 return -1; /* fatal */
240
268 close (fd); 241 close (fd);
269 /* ---------------------------------------- */
270 242
271 return 0; 243 return 0;
272} 244}
273 245
274void 246void
… …
312 } 284 }
313 } 285 }
314#endif 286#endif
315} 287}
316 288
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf { 289static struct ttyconf {
321 gid_t gid; 290 gid_t gid;
322 mode_t mode; 291 mode_t mode;
323 292
324 ttyconf () 293 ttyconf ()
… …
333 } 302 }
334 else 303 else
335#endif /* TTY_GID_SUPPORT */ 304#endif /* TTY_GID_SUPPORT */
336 { 305 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 306 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid (); 307 gid = 0;
339 } 308 }
340 } 309 }
341} ttyconf; 310} ttyconf;
342 311
343/////////////////////////////////////////////////////////////////////////////
344
345void
346rxvt_ptytty_unix::privileges (rxvt_privaction action)
347{
348 if (!name || !*name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357 if (lstat (name, &savestat) < 0) /* you lose out */
358 ;
359 else
360# endif
361 {
362 saved = true;
363 chown (name, getuid (), ttyconf.gid); /* fail silently */
364 chmod (name, ttyconf.mode);
365# ifdef HAVE_REVOKE
366 revoke (name);
367# endif
368 }
369 }
370 else
371 { /* action == RESTORE */
372# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373 if (saved)
374 {
375 chmod (name, savestat.st_mode);
376 chown (name, savestat.st_uid, savestat.st_gid);
377 }
378# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0);
381# endif
382
383 }
384
385 rxvt_privileges (IGNORE);
386}
387#endif
388
389rxvt_ptytty_unix::rxvt_ptytty_unix () 312rxvt_ptytty_unix::rxvt_ptytty_unix ()
390{ 313{
391 pty = tty = -1;
392 name = 0; 314 name = 0;
393#ifndef NO_SETOWNER_TTYDEV
394 saved = false;
395#endif
396#if UTMP_SUPPORT 315#if UTMP_SUPPORT
397 cmd_pid = 0; 316 cmd_pid = 0;
398#endif 317#endif
399} 318}
400 319
401rxvt_ptytty_unix::~rxvt_ptytty_unix () 320rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{ 321{
322#if UTMP_SUPPORT
403 logout (); 323 logout ();
324#endif
404 put (); 325 put ();
405} 326}
406 327
407void 328void
408rxvt_ptytty_unix::put () 329rxvt_ptytty_unix::put ()
409{ 330{
410#ifndef NO_SETOWNER_TTYDEV 331 chmod (name, RESTORE_TTY_MODE);
411 privileges (RESTORE); 332 chown (name, 0, ttyconf.gid);
412#endif
413 333
414 if (pty >= 0) close (pty);
415 close_tty (); 334 close_tty ();
335
336 if (pty >= 0)
337 close (pty);
338
416 free (name); 339 free (name);
417 340
418 pty = tty = -1; 341 pty = tty = -1;
419 name = 0; 342 name = 0;
420} 343}
… …
430 353
431 /* get slave (tty) */ 354 /* get slave (tty) */
432 if (tty < 0) 355 if (tty < 0)
433 { 356 {
434#ifndef NO_SETOWNER_TTYDEV 357#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE); 358 chown (name, getuid (), ttyconf.gid); /* fail silently */
359 chmod (name, ttyconf.mode);
360# ifdef HAVE_REVOKE
361 revoke (name);
362# endif
436#endif 363#endif
437 364
438 if ((tty = get_tty (name)) < 0) 365 if ((tty = get_tty (name)) < 0)
439 { 366 {
440 put (); 367 put ();
… …
443 } 370 }
444 371
445 return true; 372 return true;
446} 373}
447 374
375#if PTYTTY_HELPER
376
377static int sock_fd;
378static int pid;
379
380struct command
381{
382 enum { get, login, destroy } type;
383
384 rxvt_ptytty *id;
385
386 bool login_shell;
387 int cmd_pid;
388 char hostname[512]; // arbitrary, but should be plenty
389};
390
391struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
392{
393 rxvt_ptytty *id;
394
395 ~rxvt_ptytty_proxy ();
396
397 bool get ();
398 void login (int cmd_pid, bool login_shell, const char *hostname);
399};
400
401bool
402rxvt_ptytty_proxy::get ()
403{
404 command cmd;
405
406 cmd.type = command::get;
407
408 write (sock_fd, &cmd, sizeof (cmd));
409
410 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
411 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
412
413 if (!id)
414 return false;
415
416 if ((pty = rxvt_recv_fd (sock_fd)) < 0
417 || (tty = rxvt_recv_fd (sock_fd)) < 0)
418 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
419
420 return true;
421}
422
423void
424rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
425{
426 command cmd;
427
428 cmd.type = command::login;
429 cmd.id = id;
430 cmd.cmd_pid = cmd_pid;
431 cmd.login_shell = login_shell;
432 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
433
434 write (sock_fd, &cmd, sizeof (cmd));
435}
436
437rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
438{
439 command cmd;
440
441 cmd.type = command::destroy;
442 cmd.id = id;
443
444 write (sock_fd, &cmd, sizeof (cmd));
445}
446
447static
448void serve ()
449{
450 command cmd;
451 vector<rxvt_ptytty *> ptys;
452
453 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
454 {
455 if (cmd.type == command::get)
456 {
457 // -> id ptyfd ttyfd
458 cmd.id = new rxvt_ptytty_unix;
459
460 if (cmd.id->get ())
461 {
462 write (sock_fd, &cmd.id, sizeof (cmd.id));
463 ptys.push_back (cmd.id);
464
465 rxvt_send_fd (sock_fd, cmd.id->pty);
466 rxvt_send_fd (sock_fd, cmd.id->tty);
467 }
468 else
469 {
470 delete cmd.id;
471 cmd.id = 0;
472 write (sock_fd, &cmd.id, sizeof (cmd.id));
473 }
474 }
475 else if (cmd.type == command::login)
476 {
477#if UTMP_SUPPORT
478 if (find (ptys.begin (), ptys.end (), cmd.id))
479 {
480 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
481 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
482 }
483#endif
484 }
485 else if (cmd.type == command::destroy)
486 {
487 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
488
489 if (pty)
490 {
491 delete *pty;
492 ptys.erase (pty);
493 }
494 }
495 else
496 break;
497 }
498
499 // destroy all ptys
500 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
501 delete *i;
502}
503
504void rxvt_ptytty_server ()
505{
506 int sv[2];
507
508 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
509 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
510
511 pid = fork ();
512
513 if (pid < 0)
514 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
515
516 if (pid)
517 {
518 // client, urxvt
519 sock_fd = sv[0];
520 close (sv[1]);
521 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
522 }
523 else
524 {
525 // server, pty-helper
526 sock_fd = sv[1];
527
528 for (int fd = 0; fd < 1023; fd++)
529 if (fd != sock_fd)
530 close (fd);
531
532 serve ();
533 _exit (EXIT_SUCCESS);
534 }
535}
536
537#endif
538
448// a "factory" *g* 539// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty () 540rxvt_ptytty *
541rxvt_new_ptytty ()
450{ 542{
543#if PTYTTY_HELPER
544 if (pid > 0)
545 // use helper process
546 return new rxvt_ptytty_proxy;
547 else
548#endif
451 return new rxvt_ptytty_unix; 549 return new rxvt_ptytty_unix;
452} 550}
453 551
454/*----------------------- end-of-file (C source) -----------------------*/ 552/*----------------------- end-of-file (C source) -----------------------*/
455 553

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines