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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 UTC vs.
Revision 1.45 by root, Tue Jan 17 18:06:14 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(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
… …
54#endif 50#endif
55 51
56#include <cstdio> 52#include <cstdio>
57#include <grp.h> 53#include <grp.h>
58 54
55#include "rxvtutil.h"
56#include "fdpass.h"
59#include "ptytty.h" 57#include "ptytty.h"
60 58
61///////////////////////////////////////////////////////////////////////////// 59/////////////////////////////////////////////////////////////////////////////
62 60
63/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
… …
66/* 64/*
67 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
68 * If successful, ttydev is set to the name of the slave device. 66 * 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 67 * fd_tty _may_ also be set to an open fd to the slave device
70 */ 68 */
71static int 69static inline int
72get_pty (int *fd_tty, char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
73{ 71{
72#ifdef NO_SETOWNER_TTYDEV
74 int pfd; 73 int pfd;
75 74
75# if defined(PTYS_ARE_GETPT)
76 pfd = getpt();
77# elif defined(PTYS_ARE_POSIX)
78 pfd = posix_openpt (O_RDWR);
79# else
80 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
81# endif
82 if (pfd >= 0)
83 {
84 if (grantpt (pfd) == 0 /* change slave permissions */
85 && unlockpt (pfd) == 0)
86 { /* slave now unlocked */
87 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
88 return pfd;
89 }
90
91 close (pfd);
92 }
93#endif
94
95 return -1;
96}
97
98static inline int
99get_pty_openpty (int *fd_tty, char **ttydev)
100{
76#ifdef PTYS_ARE_OPENPTY 101#ifdef PTYS_ARE_OPENPTY
102 int pfd;
103 int res;
77 char tty_name[sizeof "/dev/pts/????\0"]; 104 char tty_name[sizeof "/dev/pts/????\0"];
78 105
79 rxvt_privileges(RESTORE);
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 112#endif
89 113
114 return -1;
115}
116
117static inline int
118get_pty__getpty (int *fd_tty, char **ttydev)
119{
90#ifdef PTYS_ARE__GETPTY 120#ifdef PTYS_ARE__GETPTY
121 int pfd;
122
91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 123 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
92 if (*ttydev != NULL) 124 if (*ttydev != NULL)
93 return pfd; 125 return pfd;
94#endif 126#endif
95 127
96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 128 return -1;
97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 129}
98 130
99 { 131static inline int
100# ifdef PTYS_ARE_GETPT 132get_pty_ptc (int *fd_tty, char **ttydev)
101 pfd = getpt(); 133{
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 134#ifdef PTYS_ARE_PTC
135 int pfd;
136
125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
126 { 138 {
127 *ttydev = strdup (ttyname (pfd)); 139 *ttydev = strdup (ttyname (pfd));
128 return pfd; 140 return pfd;
129 } 141 }
130#endif 142#endif
131 143
144 return -1;
145}
146
147static inline int
148get_pty_clone (int *fd_tty, char **ttydev)
149{
132#ifdef PTYS_ARE_CLONE 150#ifdef PTYS_ARE_CLONE
151 int pfd;
152
133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 153 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 154 {
135 *ttydev = strdup (ptsname (pfd)); 155 *ttydev = strdup (ptsname (pfd));
136 return pfd; 156 return pfd;
137 } 157 }
138#endif 158#endif
139 159
160 return -1;
161}
162
163static inline int
164get_pty_numeric (int *fd_tty, char **ttydev)
165{
140#ifdef PTYS_ARE_NUMERIC 166#ifdef PTYS_ARE_NUMERIC
141 { 167 int pfd;
142 int idx; 168 int idx;
143 char *c1, *c2; 169 char *c1, *c2;
144 char pty_name[] = "/dev/ptyp???"; 170 char pty_name[] = "/dev/ptyp???";
145 char tty_name[] = "/dev/ttyp???"; 171 char tty_name[] = "/dev/ttyp???";
146 172
147 c1 = &(pty_name[sizeof (pty_name) - 4]); 173 c1 = &(pty_name[sizeof (pty_name) - 4]);
148 c2 = &(tty_name[sizeof (tty_name) - 4]); 174 c2 = &(tty_name[sizeof (tty_name) - 4]);
175
149 for (idx = 0; idx < 256; idx++) 176 for (idx = 0; idx < 256; idx++)
150 { 177 {
151 sprintf (c1, "%d", idx); 178 sprintf (c1, "%d", idx);
152 sprintf (c2, "%d", idx); 179 sprintf (c2, "%d", idx);
180
153 if (access (tty_name, F_OK) < 0) 181 if (access (tty_name, F_OK) < 0)
154 { 182 {
155 idx = 256; 183 idx = 256;
156 break; 184 break;
157 } 185 }
158 186
159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
160 { 188 {
161 if (access (tty_name, R_OK | W_OK) == 0) 189 if (access (tty_name, R_OK | W_OK) == 0)
162 { 190 {
163 *ttydev = strdup (tty_name); 191 *ttydev = strdup (tty_name);
164 return pfd; 192 return pfd;
165 } 193 }
166 194
167 close (pfd); 195 close (pfd);
168 } 196 }
169 } 197 }
170 }
171#endif 198#endif
172 199
200 return -1;
201}
202
203static inline int
204get_pty_searched (int *fd_tty, char **ttydev)
205{
173#ifdef PTYS_ARE_SEARCHED 206#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 207# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz" 208# define PTYCHAR1 "pqrstuvwxyz"
181# endif 209# endif
182# ifndef PTYCHAR2 210# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef" 211# define PTYCHAR2 "0123456789abcdef"
184# endif 212# endif
213 int pfd;
214 const char *c1, *c2;
215 char pty_name[] = "/dev/pty??";
216 char tty_name[] = "/dev/tty??";
185 217
186 for (c1 = PTYCHAR1; *c1; c1++) 218 for (c1 = PTYCHAR1; *c1; c1++)
187 { 219 {
188 pty_name[ (sizeof (pty_name) - 3)] = 220 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[ (sizeof (pty_name) - 3)] = *c1; 221 tty_name[ (sizeof (pty_name) - 3)] = *c1;
222
190 for (c2 = PTYCHAR2; *c2; c2++) 223 for (c2 = PTYCHAR2; *c2; c2++)
191 { 224 {
192 pty_name[ (sizeof (pty_name) - 2)] = 225 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[ (sizeof (pty_name) - 2)] = *c2; 226 tty_name[ (sizeof (pty_name) - 2)] = *c2;
227
194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 228 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 { 229 {
196 if (access (tty_name, R_OK | W_OK) == 0) 230 if (access (tty_name, R_OK | W_OK) == 0)
197 { 231 {
198 *ttydev = strdup (tty_name); 232 *ttydev = strdup (tty_name);
199 return pfd; 233 return pfd;
200 } 234 }
201 235
202 close (pfd); 236 close (pfd);
203 } 237 }
204 } 238 }
205 } 239 }
206 }
207#endif 240#endif
241
242 return -1;
243}
244
245static int
246get_pty (int *fd_tty, char **ttydev)
247{
248 int pfd;
249
250 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
251 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
252 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
254 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
257 return pfd;
208 258
209 return -1; 259 return -1;
210} 260}
211 261
212/*----------------------------------------------------------------------*/ 262/*----------------------------------------------------------------------*/
… …
224 * Make our tty a controlling tty so that /dev/tty points to us 274 * Make our tty a controlling tty so that /dev/tty points to us
225 */ 275 */
226static int 276static int
227control_tty (int fd_tty) 277control_tty (int fd_tty)
228{ 278{
229 int fd;
230
231 /* ---------------------------------------- */
232 setsid (); 279 setsid ();
233 280
234 /* ---------------------------------------- */
235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 281# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
236 /* 282 /*
237 * Push STREAMS modules: 283 * Push STREAMS modules:
238 * ptem: pseudo-terminal hardware emulation module. 284 * ptem: pseudo-terminal hardware emulation module.
239 * ldterm: standard terminal line discipline. 285 * ldterm: standard terminal line discipline.
… …
257 ioctl (fd_tty, I_PUSH, "ptem"); 303 ioctl (fd_tty, I_PUSH, "ptem");
258 ioctl (fd_tty, I_PUSH, "ldterm"); 304 ioctl (fd_tty, I_PUSH, "ldterm");
259 ioctl (fd_tty, I_PUSH, "ttcompat"); 305 ioctl (fd_tty, I_PUSH, "ttcompat");
260 } 306 }
261# endif 307# endif
262 /* ---------------------------------------- */ 308
263 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 309 ioctl (fd_tty, TIOCSCTTY, NULL);
264 /* ---------------------------------------- */ 310
265 fd = open ("/dev/tty", O_WRONLY); 311 int fd = open ("/dev/tty", O_WRONLY);
266 if (fd < 0) 312 if (fd < 0)
267 return -1; /* fatal */ 313 return -1; /* fatal */
314
268 close (fd); 315 close (fd);
269 /* ---------------------------------------- */
270 316
271 return 0; 317 return 0;
272} 318}
273 319
274void 320void
… …
345void 391void
346rxvt_ptytty_unix::privileges (rxvt_privaction action) 392rxvt_ptytty_unix::privileges (rxvt_privaction action)
347{ 393{
348 if (!name || !*name) 394 if (!name || !*name)
349 return; 395 return;
350
351 rxvt_privileges (RESTORE);
352 396
353 if (action == SAVE) 397 if (action == SAVE)
354 { 398 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS 399# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ 400 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
… …
377 } 421 }
378# else 422# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); 423 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0); 424 chown (name, 0, 0);
381# endif 425# endif
382
383 } 426 }
384
385 rxvt_privileges (IGNORE);
386} 427}
387#endif 428#endif
388 429
389rxvt_ptytty_unix::rxvt_ptytty_unix () 430rxvt_ptytty_unix::rxvt_ptytty_unix ()
390{ 431{
… …
398#endif 439#endif
399} 440}
400 441
401rxvt_ptytty_unix::~rxvt_ptytty_unix () 442rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{ 443{
444#if UTMP_SUPPORT
403 logout (); 445 logout ();
446#endif
404 put (); 447 put ();
405} 448}
406 449
407void 450void
408rxvt_ptytty_unix::put () 451rxvt_ptytty_unix::put ()
… …
443 } 486 }
444 487
445 return true; 488 return true;
446} 489}
447 490
491#if PTYTTY_HELPER
492
493static int sock_fd;
494static int pid;
495
496struct command
497{
498 enum { get, login, destroy } type;
499
500 rxvt_ptytty *id;
501
502 bool login_shell;
503 int cmd_pid;
504 char hostname[512]; // arbitrary, but should be plenty
505};
506
507struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
508{
509 rxvt_ptytty *id;
510
511 ~rxvt_ptytty_proxy ();
512
513 bool get ();
514 void login (int cmd_pid, bool login_shell, const char *hostname);
515};
516
517bool
518rxvt_ptytty_proxy::get ()
519{
520 command cmd;
521
522 cmd.type = command::get;
523
524 write (sock_fd, &cmd, sizeof (cmd));
525
526 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
527 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
528
529 if (!id)
530 return false;
531
532 if ((pty = rxvt_recv_fd (sock_fd)) < 0
533 || (tty = rxvt_recv_fd (sock_fd)) < 0)
534 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
535
536 return true;
537}
538
539void
540rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
541{
542 command cmd;
543
544 cmd.type = command::login;
545 cmd.id = id;
546 cmd.cmd_pid = cmd_pid;
547 cmd.login_shell = login_shell;
548 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
549
550 write (sock_fd, &cmd, sizeof (cmd));
551}
552
553rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
554{
555 command cmd;
556
557 cmd.type = command::destroy;
558 cmd.id = id;
559
560 write (sock_fd, &cmd, sizeof (cmd));
561}
562
563static
564void serve ()
565{
566 command cmd;
567 vector<rxvt_ptytty *> ptys;
568
569 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
570 {
571 if (cmd.type == command::get)
572 {
573 // -> id ptyfd ttyfd
574 cmd.id = new rxvt_ptytty_unix;
575
576 if (cmd.id->get ())
577 {
578 write (sock_fd, &cmd.id, sizeof (cmd.id));
579 ptys.push_back (cmd.id);
580
581 rxvt_send_fd (sock_fd, cmd.id->pty);
582 rxvt_send_fd (sock_fd, cmd.id->tty);
583 }
584 else
585 {
586 delete cmd.id;
587 cmd.id = 0;
588 write (sock_fd, &cmd.id, sizeof (cmd.id));
589 }
590 }
591 else if (cmd.type == command::login)
592 {
593#if UTMP_SUPPORT
594 if (find (ptys.begin (), ptys.end (), cmd.id))
595 {
596 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
597 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
598 }
599#endif
600 }
601 else if (cmd.type == command::destroy)
602 {
603 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
604
605 if (pty)
606 {
607 delete *pty;
608 ptys.erase (pty);
609 }
610 }
611 else
612 break;
613 }
614
615 // destroy all ptys
616 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
617 delete *i;
618}
619
620void rxvt_ptytty_server ()
621{
622 int sv[2];
623
624 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
625 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
626
627 pid = fork ();
628
629 if (pid < 0)
630 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
631
632 if (pid)
633 {
634 // client, urxvt
635 sock_fd = sv[0];
636 close (sv[1]);
637 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
638 }
639 else
640 {
641 setgid (getegid ());
642 setuid (geteuid ());
643
644 // server, pty-helper
645 sock_fd = sv[1];
646
647 for (int fd = 0; fd < 1023; fd++)
648 if (fd != sock_fd && fd != 1)
649 close (fd);
650
651 serve ();
652 _exit (EXIT_SUCCESS);
653 }
654}
655#endif
656
448// a "factory" *g* 657// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty () 658rxvt_ptytty *
659rxvt_new_ptytty ()
450{ 660{
661#if PTYTTY_HELPER
662 if (pid > 0)
663 // use helper process
664 return new rxvt_ptytty_proxy;
665 else
666#endif
451 return new rxvt_ptytty_unix; 667 return new rxvt_ptytty_unix;
452} 668}
453 669
454/*----------------------- end-of-file (C source) -----------------------*/ 670/*----------------------- end-of-file (C source) -----------------------*/
455 671

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