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 1.38 by root, Tue Jan 17 11:53:07 2006 UTC vs.
Revision 1.44 by ayin, Tue Jan 17 17:59:31 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 */
… …
53# include <util.h> 49# include <util.h>
54#endif 50#endif
55 51
56#include <cstdio> 52#include <cstdio>
57#include <grp.h> 53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58 58
59///////////////////////////////////////////////////////////////////////////// 59/////////////////////////////////////////////////////////////////////////////
60 60
61/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
64/* 64/*
65 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 68 */
69static int 69static inline int
70get_pty (int *fd_tty, char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
71{ 71{
72#ifdef NO_SETOWNER_TTYDEV
72 int pfd; 73 int pfd;
73 74
75# ifdef PTYS_ARE_GETPT
76 pfd = getpt();
77# else
78# ifdef PTYS_ARE_POSIX
79 pfd = posix_openpt (O_RDWR);
80# else
81 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
82# endif
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 }
92 close (pfd);
93 }
94#endif
95 return -1;
96}
97
98static inline int
99get_pty_openpty (int *fd_tty, char **ttydev)
100{
74#ifdef PTYS_ARE_OPENPTY 101#ifdef PTYS_ARE_OPENPTY
102 int pfd;
103 int res;
75 char tty_name[sizeof "/dev/pts/????\0"]; 104 char tty_name[sizeof "/dev/pts/????\0"];
76 105
77 rxvt_privileges(RESTORE);
78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1) 107 if (res != -1)
82 { 108 {
83 *ttydev = strdup (tty_name); 109 *ttydev = strdup (tty_name);
84 return pfd; 110 return pfd;
85 } 111 }
86#endif 112#endif
113 return -1;
114}
87 115
116static inline int
117get_pty__getpty (int *fd_tty, char **ttydev)
118{
88#ifdef PTYS_ARE__GETPTY 119#ifdef PTYS_ARE__GETPTY
120 int pfd;
121
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 122 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 123 if (*ttydev != NULL)
91 return pfd; 124 return pfd;
92#endif 125#endif
126 return -1;
127}
93 128
94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 129static inline int
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 130get_pty_ptc (int *fd_tty, char **ttydev)
96 131{
97 {
98# ifdef PTYS_ARE_GETPT
99 pfd = getpt();
100# else
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
105# endif
106# endif
107
108 if (pfd >= 0)
109 {
110 if (grantpt (pfd) == 0 /* change slave permissions */
111 && unlockpt (pfd) == 0)
112 { /* slave now unlocked */
113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
114 return pfd;
115 }
116 close (pfd);
117 }
118 }
119# endif
120#endif
121
122#ifdef PTYS_ARE_PTC 132#ifdef PTYS_ARE_PTC
133 int pfd;
134
123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 135 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
124 { 136 {
125 *ttydev = strdup (ttyname (pfd)); 137 *ttydev = strdup (ttyname (pfd));
126 return pfd; 138 return pfd;
127 } 139 }
128#endif 140#endif
141 return -1;
142}
129 143
144static inline int
145get_pty_clone (int *fd_tty, char **ttydev)
146{
130#ifdef PTYS_ARE_CLONE 147#ifdef PTYS_ARE_CLONE
148 int pfd;
149
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 150 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
132 { 151 {
133 *ttydev = strdup (ptsname (pfd)); 152 *ttydev = strdup (ptsname (pfd));
134 return pfd; 153 return pfd;
135 } 154 }
136#endif 155#endif
156 return -1;
157}
137 158
159static inline int
160get_pty_numeric (int *fd_tty, char **ttydev)
161{
138#ifdef PTYS_ARE_NUMERIC 162#ifdef PTYS_ARE_NUMERIC
139 { 163 int pfd;
140 int idx; 164 int idx;
141 char *c1, *c2; 165 char *c1, *c2;
142 char pty_name[] = "/dev/ptyp???"; 166 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???"; 167 char tty_name[] = "/dev/ttyp???";
144 168
… …
163 } 187 }
164 188
165 close (pfd); 189 close (pfd);
166 } 190 }
167 } 191 }
168 }
169#endif 192#endif
193 return -1;
194}
170 195
196static inline int
197get_pty_searched (int *fd_tty, char **ttydev)
198{
171#ifdef PTYS_ARE_SEARCHED 199#ifdef PTYS_ARE_SEARCHED
172 { 200# ifndef PTYCHAR1
201# define PTYCHAR1 "pqrstuvwxyz"
202# endif
203# ifndef PTYCHAR2
204# define PTYCHAR2 "0123456789abcdef"
205# endif
206 int pfd;
173 const char *c1, *c2; 207 const char *c1, *c2;
174 char pty_name[] = "/dev/pty??"; 208 char pty_name[] = "/dev/pty??";
175 char tty_name[] = "/dev/tty??"; 209 char tty_name[] = "/dev/tty??";
176
177# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz"
179# endif
180# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef"
182# endif
183 210
184 for (c1 = PTYCHAR1; *c1; c1++) 211 for (c1 = PTYCHAR1; *c1; c1++)
185 { 212 {
186 pty_name[ (sizeof (pty_name) - 3)] = 213 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1; 214 tty_name[ (sizeof (pty_name) - 3)] = *c1;
… …
199 226
200 close (pfd); 227 close (pfd);
201 } 228 }
202 } 229 }
203 } 230 }
204 }
205#endif 231#endif
232 return -1;
233}
206 234
235static int
236get_pty (int *fd_tty, char **ttydev)
237{
238 int pfd;
239
240 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
241 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
242 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
243 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
244 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
245 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
246 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
247 return pfd;
207 return -1; 248 return -1;
208} 249}
209 250
210/*----------------------------------------------------------------------*/ 251/*----------------------------------------------------------------------*/
211/* 252/*
… …
344rxvt_ptytty_unix::privileges (rxvt_privaction action) 385rxvt_ptytty_unix::privileges (rxvt_privaction action)
345{ 386{
346 if (!name || !*name) 387 if (!name || !*name)
347 return; 388 return;
348 389
349 rxvt_privileges (RESTORE);
350
351 if (action == SAVE) 390 if (action == SAVE)
352 { 391 {
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS 392# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ 393 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
355 if (lstat (name, &savestat) < 0) /* you lose out */ 394 if (lstat (name, &savestat) < 0) /* you lose out */
… …
377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); 416 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
378 chown (name, 0, 0); 417 chown (name, 0, 0);
379# endif 418# endif
380 419
381 } 420 }
382
383 rxvt_privileges (IGNORE);
384} 421}
385#endif 422#endif
386 423
387rxvt_ptytty_unix::rxvt_ptytty_unix () 424rxvt_ptytty_unix::rxvt_ptytty_unix ()
388{ 425{
… …
396#endif 433#endif
397} 434}
398 435
399rxvt_ptytty_unix::~rxvt_ptytty_unix () 436rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{ 437{
438#if UTMP_SUPPORT
401 logout (); 439 logout ();
440#endif
402 put (); 441 put ();
403} 442}
404 443
405void 444void
406rxvt_ptytty_unix::put () 445rxvt_ptytty_unix::put ()
… …
441 } 480 }
442 481
443 return true; 482 return true;
444} 483}
445 484
485#if PTYTTY_HELPER
486
487static int sock_fd;
488static int pid;
489
490struct command
491{
492 enum { get, login, destroy } type;
493
494 rxvt_ptytty *id;
495
496 bool login_shell;
497 int cmd_pid;
498 char hostname[512]; // arbitrary, but should be plenty
499};
500
501struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
502{
503 rxvt_ptytty *id;
504
505 ~rxvt_ptytty_proxy ();
506
507 bool get ();
508 void login (int cmd_pid, bool login_shell, const char *hostname);
509};
510
511bool
512rxvt_ptytty_proxy::get ()
513{
514 command cmd;
515
516 cmd.type = command::get;
517
518 write (sock_fd, &cmd, sizeof (cmd));
519
520 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
521 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
522
523 if (!id)
524 return false;
525
526 if ((pty = rxvt_recv_fd (sock_fd)) < 0
527 || (tty = rxvt_recv_fd (sock_fd)) < 0)
528 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
529
530 return true;
531}
532
533void
534rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
535{
536 command cmd;
537
538 cmd.type = command::login;
539 cmd.id = id;
540 cmd.cmd_pid = cmd_pid;
541 cmd.login_shell = login_shell;
542 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
543
544 write (sock_fd, &cmd, sizeof (cmd));
545}
546
547rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
548{
549 command cmd;
550
551 cmd.type = command::destroy;
552 cmd.id = id;
553
554 write (sock_fd, &cmd, sizeof (cmd));
555}
556
557static
558void serve ()
559{
560 command cmd;
561 vector<rxvt_ptytty *> ptys;
562
563 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
564 {
565 if (cmd.type == command::get)
566 {
567 // -> id ptyfd ttyfd
568 cmd.id = new rxvt_ptytty_unix;
569
570 if (cmd.id->get ())
571 {
572 write (sock_fd, &cmd.id, sizeof (cmd.id));
573 ptys.push_back (cmd.id);
574
575 rxvt_send_fd (sock_fd, cmd.id->pty);
576 rxvt_send_fd (sock_fd, cmd.id->tty);
577 }
578 else
579 {
580 delete cmd.id;
581 cmd.id = 0;
582 write (sock_fd, &cmd.id, sizeof (cmd.id));
583 }
584 }
585 else if (cmd.type == command::login)
586 {
587#if UTMP_SUPPORT
588 if (find (ptys.begin (), ptys.end (), cmd.id))
589 {
590 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
591 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
592 }
593#endif
594 }
595 else if (cmd.type == command::destroy)
596 {
597 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
598
599 if (pty)
600 {
601 delete *pty;
602 ptys.erase (pty);
603 }
604 }
605 else
606 break;
607 }
608
609 // destroy all ptys
610 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
611 delete *i;
612}
613
614void rxvt_ptytty_server ()
615{
616 int sv[2];
617
618 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
619 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
620
621 pid = fork ();
622
623 if (pid < 0)
624 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
625
626 if (pid)
627 {
628 // client, urxvt
629 sock_fd = sv[0];
630 close (sv[1]);
631 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
632 }
633 else
634 {
635 setgid (getegid ());
636 setuid (geteuid ());
637
638 // server, pty-helper
639 sock_fd = sv[1];
640
641 for (int fd = 0; fd < 1023; fd++)
642 if (fd != sock_fd && fd != 1)
643 close (fd);
644
645 serve ();
646 _exit (EXIT_SUCCESS);
647 }
648}
649#endif
650
651// a "factory" *g*
652rxvt_ptytty *
653rxvt_new_ptytty ()
654{
655#if PTYTTY_HELPER
656 if (pid > 0)
657 // use helper process
658 return new rxvt_ptytty_proxy;
659 else
660#endif
661 return new rxvt_ptytty_unix;
662}
663
446/*----------------------- end-of-file (C source) -----------------------*/ 664/*----------------------- end-of-file (C source) -----------------------*/
447 665

Diff Legend

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