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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 |
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31 | # include <sys/types.h> |
30 | #include <sys/types.h> |
32 | #endif |
31 | #include <sys/socket.h> |
33 | #ifdef HAVE_UNISTD_H |
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34 | # include <unistd.h> |
32 | #include <unistd.h> |
35 | #endif |
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36 | #ifdef HAVE_FCNTL_H |
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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 */ |
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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> |
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54 | |
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55 | #include "rxvtutil.h" |
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56 | #include "fdpass.h" |
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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 * |
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72 | int pfd; |
72 | int pfd; |
73 | |
73 | |
74 | #ifdef PTYS_ARE_OPENPTY |
74 | #ifdef PTYS_ARE_OPENPTY |
75 | char tty_name[sizeof "/dev/pts/????\0"]; |
75 | char tty_name[sizeof "/dev/pts/????\0"]; |
76 | |
76 | |
77 | rxvt_privileges(RESTORE); |
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78 | int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
77 | int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
79 | rxvt_privileges(IGNORE); |
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80 | |
78 | |
81 | if (res != -1) |
79 | if (res != -1) |
82 | { |
80 | { |
83 | *ttydev = strdup (tty_name); |
81 | *ttydev = strdup (tty_name); |
84 | return pfd; |
82 | return pfd; |
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344 | rxvt_ptytty_unix::privileges (rxvt_privaction action) |
342 | rxvt_ptytty_unix::privileges (rxvt_privaction action) |
345 | { |
343 | { |
346 | if (!name || !*name) |
344 | if (!name || !*name) |
347 | return; |
345 | return; |
348 | |
346 | |
349 | rxvt_privileges (RESTORE); |
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350 | |
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351 | if (action == SAVE) |
347 | if (action == SAVE) |
352 | { |
348 | { |
353 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
349 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
354 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
350 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
355 | if (lstat (name, &savestat) < 0) /* you lose out */ |
351 | if (lstat (name, &savestat) < 0) /* you lose out */ |
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377 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
373 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
378 | chown (name, 0, 0); |
374 | chown (name, 0, 0); |
379 | # endif |
375 | # endif |
380 | |
376 | |
381 | } |
377 | } |
382 | |
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383 | rxvt_privileges (IGNORE); |
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384 | } |
378 | } |
385 | #endif |
379 | #endif |
386 | |
380 | |
387 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
381 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
388 | { |
382 | { |
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441 | } |
435 | } |
442 | |
436 | |
443 | return true; |
437 | return true; |
444 | } |
438 | } |
445 | |
439 | |
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440 | #if PTYTTY_HELPER |
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441 | |
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442 | static int sock_fd; |
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443 | static int pid; |
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444 | |
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445 | struct command |
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446 | { |
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447 | enum { get, login, destroy } type; |
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448 | |
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449 | rxvt_ptytty *id; |
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450 | |
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451 | bool login_shell; |
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452 | int cmd_pid; |
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453 | char hostname[512]; // arbitrary, but should be plenty |
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454 | }; |
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455 | |
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456 | struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty |
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457 | { |
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458 | rxvt_ptytty *id; |
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459 | |
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460 | ~rxvt_ptytty_proxy (); |
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461 | |
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462 | bool get (); |
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463 | void login (int cmd_pid, bool login_shell, const char *hostname); |
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464 | }; |
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465 | |
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466 | bool |
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467 | rxvt_ptytty_proxy::get () |
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468 | { |
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469 | command cmd; |
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470 | |
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471 | cmd.type = command::get; |
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472 | |
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473 | write (sock_fd, &cmd, sizeof (cmd)); |
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474 | |
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475 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
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476 | rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
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477 | |
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478 | if (!id) |
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479 | return false; |
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480 | |
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481 | if ((pty = rxvt_recv_fd (sock_fd)) < 0 |
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482 | || (tty = rxvt_recv_fd (sock_fd)) < 0) |
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483 | rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
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484 | |
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485 | return true; |
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486 | } |
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487 | |
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488 | void |
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489 | rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
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490 | { |
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491 | command cmd; |
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492 | |
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493 | cmd.type = command::login; |
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494 | cmd.id = id; |
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495 | cmd.cmd_pid = cmd_pid; |
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496 | cmd.login_shell = login_shell; |
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497 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
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498 | |
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499 | write (sock_fd, &cmd, sizeof (cmd)); |
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500 | } |
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501 | |
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502 | rxvt_ptytty_proxy::~rxvt_ptytty_proxy () |
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503 | { |
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504 | command cmd; |
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505 | |
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506 | cmd.type = command::destroy; |
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507 | cmd.id = id; |
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508 | |
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509 | write (sock_fd, &cmd, sizeof (cmd)); |
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510 | } |
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511 | |
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512 | static |
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513 | void serve () |
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514 | { |
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515 | command cmd; |
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516 | vector<rxvt_ptytty *> ptys; |
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517 | |
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518 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
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519 | { |
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520 | if (cmd.type == command::get) |
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521 | { |
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522 | // -> id ptyfd ttyfd |
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523 | cmd.id = new rxvt_ptytty_unix; |
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524 | |
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525 | if (cmd.id->get ()) |
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526 | { |
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527 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
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528 | ptys.push_back (cmd.id); |
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529 | |
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530 | rxvt_send_fd (sock_fd, cmd.id->pty); |
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531 | rxvt_send_fd (sock_fd, cmd.id->tty); |
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532 | } |
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533 | else |
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534 | { |
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535 | delete cmd.id; |
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536 | cmd.id = 0; |
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537 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
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538 | } |
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539 | } |
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540 | else if (cmd.type == command::login) |
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541 | { |
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542 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
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543 | { |
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544 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
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545 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
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546 | } |
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547 | } |
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548 | else if (cmd.type == command::destroy) |
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549 | { |
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550 | rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
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551 | |
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552 | if (pty) |
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553 | { |
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554 | delete *pty; |
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555 | ptys.erase (pty); |
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556 | } |
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557 | } |
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558 | else |
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559 | break; |
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560 | } |
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561 | |
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562 | // destroy all ptys |
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563 | for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
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564 | delete *i; |
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565 | } |
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566 | |
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567 | void rxvt_ptytty_server () |
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568 | { |
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569 | int sv[2]; |
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570 | |
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571 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
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572 | rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
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573 | |
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574 | pid = fork (); |
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575 | |
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576 | if (pid < 0) |
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577 | rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
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578 | |
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579 | if (pid) |
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580 | { |
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581 | // client, urxvt |
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582 | sock_fd = sv[0]; |
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583 | close (sv[1]); |
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584 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
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585 | } |
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586 | else |
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587 | { |
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588 | setgid (getegid ()); |
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589 | setuid (geteuid ()); |
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590 | |
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591 | // server, pty-helper |
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592 | sock_fd = sv[1]; |
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593 | |
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594 | for (int fd = 0; fd < 1023; fd++) |
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595 | if (fd != sock_fd && fd != 1) |
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596 | close (fd); |
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597 | |
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598 | serve (); |
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599 | _exit (EXIT_SUCCESS); |
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600 | } |
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601 | } |
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602 | #endif |
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603 | |
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604 | // a "factory" *g* |
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605 | rxvt_ptytty * |
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606 | rxvt_new_ptytty () |
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607 | { |
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608 | #if PTYTTY_HELPER |
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609 | if (pid > 0) |
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610 | // use helper process |
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611 | return new rxvt_ptytty_proxy; |
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612 | else |
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613 | #endif |
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614 | return new rxvt_ptytty_unix; |
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615 | } |
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616 | |
446 | /*----------------------- end-of-file (C source) -----------------------*/ |
617 | /*----------------------- end-of-file (C source) -----------------------*/ |
447 | |
618 | |