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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.37 by sf-exg, Sun Mar 28 08:39:34 2010 UTC vs.
Revision 1.53 by root, Thu May 22 18:54:32 2014 UTC

1// This file is part of libptytty. Do not make local modifications.
2// http://software.schmorp.de/pkg/libptytty
3
4/*----------------------------------------------------------------------* 1/*----------------------------------------------------------------------*
5 * File: ptytty.C 2 * File: ptytty.C
6 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
7 * 4 *
8 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 7 * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> 8 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
12 * 9 *
13 * This program is free software; you can redistribute it and/or modify 10 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by 11 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or 12 * the Free Software Foundation; either version 3 of the License, or
16 * (at your option) any later version. 13 * (at your option) any later version.
17 * 14 *
18 * This program is distributed in the hope that it will be useful, 15 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
… …
27 24
28#include "config.h" 25#include "config.h"
29 26
30#include "ptytty.h" 27#include "ptytty.h"
31 28
32#include <cstdlib> 29#include <stdlib.h>
30#include <stdio.h>
33#include <cstring> 31#include <string.h>
34#include <csignal>
35 32
36#include <sys/types.h> 33#include <sys/types.h>
37#include <sys/stat.h> 34#include <sys/stat.h>
38#include <unistd.h> 35#include <unistd.h>
39#include <fcntl.h> 36#include <fcntl.h>
40 37
41#ifdef HAVE_SYS_IOCTL_H 38#ifdef HAVE_SYS_IOCTL_H
42# include <sys/ioctl.h> 39# include <sys/ioctl.h>
43#endif 40#endif
44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) 41#ifdef HAVE_STROPTS_H
45# include <sys/stropts.h> /* for I_PUSH */
46#endif
47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
48# include <stropts.h> 42# include <stropts.h>
49#endif 43#endif
50#if defined(HAVE_PTY_H) 44#if defined(HAVE_PTY_H)
51# include <pty.h> 45# include <pty.h>
52#elif defined(HAVE_LIBUTIL_H) 46#elif defined(HAVE_LIBUTIL_H)
… …
56#endif 50#endif
57#ifdef TTY_GID_SUPPORT 51#ifdef TTY_GID_SUPPORT
58#include <grp.h> 52#include <grp.h>
59#endif 53#endif
60 54
61#include <cstdio> 55#ifndef O_NOCTTY
56# define O_NOCTTY 0
57#endif
62 58
63///////////////////////////////////////////////////////////////////////////// 59/////////////////////////////////////////////////////////////////////////////
64 60
65/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
76 get_pty (int *fd_tty, char **ttydev) 72 get_pty (int *fd_tty, char **ttydev)
77 { 73 {
78 int pfd; 74 int pfd;
79 75
80# if defined(HAVE_GETPT) 76# if defined(HAVE_GETPT)
81 pfd = getpt(); 77 pfd = getpt ();
82# elif defined(HAVE_POSIX_OPENPT) 78# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR); 79 pfd = posix_openpt (O_RDWR | O_NOCTTY);
84# else 80# else
81# ifdef _AIX
85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 82 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
83# else
84 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
85# endif
86# endif 86# endif
87 87
88 if (pfd >= 0) 88 if (pfd >= 0)
89 { 89 {
90 if (grantpt (pfd) == 0 /* change slave permissions */ 90 if (grantpt (pfd) == 0 /* change slave permissions */
… …
126 get_pty (int *fd_tty, char **ttydev) 126 get_pty (int *fd_tty, char **ttydev)
127 { 127 {
128 int pfd; 128 int pfd;
129 char *slave; 129 char *slave;
130 130
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 131 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
132 132
133 if (slave != NULL) 133 if (slave != NULL)
134 { 134 {
135 *ttydev = strdup (slave); 135 *ttydev = strdup (slave);
136 return pfd; 136 return pfd;
… …
152 const char *majors = "pqrstuvwxyzabcde"; 152 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef"; 153 const char *minors = "0123456789abcdef";
154 154
155 for (i = 0; i < 256; i++) 155 for (i = 0; i < 256; i++)
156 { 156 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 157 snprintf (pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 158 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159 159
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
161 { 161 {
162 snprintf(pty_name, 32, "/dev/ptyp%d", i); 162 snprintf (pty_name, 32, "/dev/ptyp%d", i);
163 snprintf(tty_name, 32, "/dev/ttyp%d", i); 163 snprintf (tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue; 165 continue;
166 } 166 }
167 167
168 if (access (tty_name, R_OK | W_OK) == 0) 168 if (access (tty_name, R_OK | W_OK) == 0)
… …
197control_tty (int fd_tty) 197control_tty (int fd_tty)
198{ 198{
199 int fd; 199 int fd;
200 200
201 setsid (); 201 setsid ();
202
203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
204 /*
205 * Push STREAMS modules:
206 * ptem: pseudo-terminal hardware emulation module.
207 * ldterm: standard terminal line discipline.
208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
209 *
210 * After we push the STREAMS modules, the first open () on the slave side
211 * (i.e. the next section between the dashes giving us "tty opened OK")
212 * should make the "ptem" (or "ldterm" depending upon either which OS
213 * version or which set of manual pages you have) module give us a
214 * controlling terminal. We must already have close ()d the master side
215 * fd in this child process before we push STREAMS modules on because the
216 * documentation is really unclear about whether it is any close () on
217 * the master side or the last close () - i.e. a proper STREAMS dismantling
218 * close () - on the master side which causes a hang up to be sent
219 * through - Geoff Wing
220 */
221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
222 if (isastream (fd_tty) == 1)
223# endif
224 {
225 ioctl (fd_tty, I_PUSH, "ptem");
226 ioctl (fd_tty, I_PUSH, "ldterm");
227 ioctl (fd_tty, I_PUSH, "ttcompat");
228 }
229#endif
230 202
231#ifdef TIOCSCTTY 203#ifdef TIOCSCTTY
232 ioctl (fd_tty, TIOCSCTTY, NULL); 204 ioctl (fd_tty, TIOCSCTTY, NULL);
233#else 205#else
234 fd = open (ttyname (fd_tty), O_RDWR); 206 fd = open (ttyname (fd_tty), O_RDWR);
… …
353{ 325{
354 /* get master (pty) */ 326 /* get master (pty) */
355 if ((pty = get_pty (&tty, &name)) < 0) 327 if ((pty = get_pty (&tty, &name)) < 0)
356 return false; 328 return false;
357 329
358 fcntl (pty, F_SETFL, O_NONBLOCK);
359
360 /* get slave (tty) */ 330 /* get slave (tty) */
361 if (tty < 0) 331 if (tty < 0)
362 { 332 {
363#ifndef NO_SETOWNER_TTYDEV 333#ifndef NO_SETOWNER_TTYDEV
364 chown (name, getuid (), ttyconf.gid); /* fail silently */ 334 chown (name, getuid (), ttyconf.gid); /* fail silently */
… …
373 put (); 343 put ();
374 return false; 344 return false;
375 } 345 }
376 } 346 }
377 347
348#if defined(I_PUSH)
349 /*
350 * Push STREAMS modules:
351 * ptem: pseudo-terminal hardware emulation module.
352 * ldterm: standard terminal line discipline.
353 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
354 *
355 * After we push the STREAMS modules, the first open () on the slave side
356 * should make the "ptem" (or "ldterm" depending upon either which OS
357 * version or which set of manual pages you have) module give us a
358 * controlling terminal. We must already have close ()d the master side
359 * fd in this child process before we push STREAMS modules on because the
360 * documentation is really unclear about whether it is any close () on
361 * the master side or the last close () - i.e. a proper STREAMS dismantling
362 * close () - on the master side which causes a hang up to be sent
363 * through - Geoff Wing
364 */
365#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
366 if (isastream (tty) == 1)
367# endif
368 {
369 ioctl (tty, I_PUSH, "ptem");
370 ioctl (tty, I_PUSH, "ldterm");
371 ioctl (tty, I_PUSH, "ttcompat");
372 }
373#endif
374
375#if UTMP_SUPPORT
376# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
377 int fd_stdin = dup (STDIN_FILENO);
378 dup2 (tty, STDIN_FILENO);
379
380 utmp_pos = ttyslot ();
381
382 dup2 (fd_stdin, STDIN_FILENO);
383 close (fd_stdin);
384# endif
385#endif
386
378 return true; 387 return true;
379} 388}
380 389

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