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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 1.48 by root, Wed Jan 18 12:19:31 2012 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 2 of the License, or
… …
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 <cstdlib>
30#include <cstdio>
33#include <cstring> 31#include <cstring>
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#if defined(HAVE_SYS_STROPTS_H)
45# include <sys/stropts.h> /* for I_PUSH */ 42# include <sys/stropts.h> /* for I_PUSH */
46#endif 43#endif
47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) 44#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
48# include <stropts.h> 45# include <stropts.h>
49#endif 46#endif
… …
56#endif 53#endif
57#ifdef TTY_GID_SUPPORT 54#ifdef TTY_GID_SUPPORT
58#include <grp.h> 55#include <grp.h>
59#endif 56#endif
60 57
61#include <cstdio> 58#ifndef O_NOCTTY
59# define O_NOCTTY 0
60#endif
62 61
63///////////////////////////////////////////////////////////////////////////// 62/////////////////////////////////////////////////////////////////////////////
64 63
65/* ------------------------------------------------------------------------- * 64/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 65 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
76 get_pty (int *fd_tty, char **ttydev) 75 get_pty (int *fd_tty, char **ttydev)
77 { 76 {
78 int pfd; 77 int pfd;
79 78
80# if defined(HAVE_GETPT) 79# if defined(HAVE_GETPT)
81 pfd = getpt(); 80 pfd = getpt ();
82# elif defined(HAVE_POSIX_OPENPT) 81# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR); 82 pfd = posix_openpt (O_RDWR | O_NOCTTY);
84# else 83# else
84# ifdef _AIX
85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 85 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
86# else
87 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
88# endif
86# endif 89# endif
87 90
88 if (pfd >= 0) 91 if (pfd >= 0)
89 { 92 {
90 if (grantpt (pfd) == 0 /* change slave permissions */ 93 if (grantpt (pfd) == 0 /* change slave permissions */
… …
126 get_pty (int *fd_tty, char **ttydev) 129 get_pty (int *fd_tty, char **ttydev)
127 { 130 {
128 int pfd; 131 int pfd;
129 char *slave; 132 char *slave;
130 133
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 134 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
132 135
133 if (slave != NULL) 136 if (slave != NULL)
134 { 137 {
135 *ttydev = strdup (slave); 138 *ttydev = strdup (slave);
136 return pfd; 139 return pfd;
… …
152 const char *majors = "pqrstuvwxyzabcde"; 155 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef"; 156 const char *minors = "0123456789abcdef";
154 157
155 for (i = 0; i < 256; i++) 158 for (i = 0; i < 256; i++)
156 { 159 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 160 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]); 161 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159 162
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 163 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
161 { 164 {
162 snprintf(pty_name, 32, "/dev/ptyp%d", i); 165 snprintf (pty_name, 32, "/dev/ptyp%d", i);
163 snprintf(tty_name, 32, "/dev/ttyp%d", i); 166 snprintf (tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 167 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue; 168 continue;
166 } 169 }
167 170
168 if (access (tty_name, R_OK | W_OK) == 0) 171 if (access (tty_name, R_OK | W_OK) == 0)
… …
197control_tty (int fd_tty) 200control_tty (int fd_tty)
198{ 201{
199 int fd; 202 int fd;
200 203
201 setsid (); 204 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
230 205
231#ifdef TIOCSCTTY 206#ifdef TIOCSCTTY
232 ioctl (fd_tty, TIOCSCTTY, NULL); 207 ioctl (fd_tty, TIOCSCTTY, NULL);
233#else 208#else
234 fd = open (ttyname (fd_tty), O_RDWR); 209 fd = open (ttyname (fd_tty), O_RDWR);
… …
353{ 328{
354 /* get master (pty) */ 329 /* get master (pty) */
355 if ((pty = get_pty (&tty, &name)) < 0) 330 if ((pty = get_pty (&tty, &name)) < 0)
356 return false; 331 return false;
357 332
358 fcntl (pty, F_SETFL, O_NONBLOCK);
359
360 /* get slave (tty) */ 333 /* get slave (tty) */
361 if (tty < 0) 334 if (tty < 0)
362 { 335 {
363#ifndef NO_SETOWNER_TTYDEV 336#ifndef NO_SETOWNER_TTYDEV
364 chown (name, getuid (), ttyconf.gid); /* fail silently */ 337 chown (name, getuid (), ttyconf.gid); /* fail silently */
… …
373 put (); 346 put ();
374 return false; 347 return false;
375 } 348 }
376 } 349 }
377 350
351#if defined(I_PUSH)
352 /*
353 * Push STREAMS modules:
354 * ptem: pseudo-terminal hardware emulation module.
355 * ldterm: standard terminal line discipline.
356 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
357 *
358 * After we push the STREAMS modules, the first open () on the slave side
359 * should make the "ptem" (or "ldterm" depending upon either which OS
360 * version or which set of manual pages you have) module give us a
361 * controlling terminal. We must already have close ()d the master side
362 * fd in this child process before we push STREAMS modules on because the
363 * documentation is really unclear about whether it is any close () on
364 * the master side or the last close () - i.e. a proper STREAMS dismantling
365 * close () - on the master side which causes a hang up to be sent
366 * through - Geoff Wing
367 */
368#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
369 if (isastream (tty) == 1)
370# endif
371 {
372 ioctl (tty, I_PUSH, "ptem");
373 ioctl (tty, I_PUSH, "ldterm");
374 ioctl (tty, I_PUSH, "ttcompat");
375 }
376#endif
377
378#if UTMP_SUPPORT
379# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
380 int fd_stdin = dup (STDIN_FILENO);
381 dup2 (tty, STDIN_FILENO);
382
383 utmp_pos = ttyslot ();
384
385 dup2 (fd_stdin, STDIN_FILENO);
386 close (fd_stdin);
387# endif
388#endif
389
378 return true; 390 return true;
379} 391}
380 392

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