1 |
pcg |
1.1 |
/*--------------------------------*-C-*---------------------------------* |
2 |
pcg |
1.11 |
* File: ptytty.C |
3 |
pcg |
1.1 |
*----------------------------------------------------------------------* |
4 |
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* |
5 |
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* All portions of code are copyright by their respective author/s. |
6 |
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* Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
7 |
root |
1.30 |
* Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
8 |
pcg |
1.1 |
* |
9 |
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* This program is free software; you can redistribute it and/or modify |
10 |
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* it under the terms of the GNU General Public License as published by |
11 |
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* the Free Software Foundation; either version 2 of the License, or |
12 |
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* (at your option) any later version. |
13 |
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* |
14 |
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* This program is distributed in the hope that it will be useful, |
15 |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 |
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* GNU General Public License for more details. |
18 |
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* |
19 |
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* You should have received a copy of the GNU General Public License |
20 |
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* along with this program; if not, write to the Free Software |
21 |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 |
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*---------------------------------------------------------------------*/ |
23 |
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24 |
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#include "../config.h" /* NECESSARY */ |
25 |
root |
1.16 |
#include "rxvt.h" |
26 |
pcg |
1.1 |
|
27 |
pcg |
1.8 |
# include <cstdlib> |
28 |
root |
1.31 |
# include <cstring> |
29 |
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|
30 |
pcg |
1.1 |
#ifdef HAVE_SYS_TYPES_H |
31 |
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# include <sys/types.h> |
32 |
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#endif |
33 |
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#ifdef HAVE_UNISTD_H |
34 |
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# include <unistd.h> |
35 |
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#endif |
36 |
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#ifdef HAVE_FCNTL_H |
37 |
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# include <fcntl.h> |
38 |
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#endif |
39 |
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#ifdef HAVE_SYS_IOCTL_H |
40 |
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# include <sys/ioctl.h> |
41 |
|
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#endif |
42 |
root |
1.12 |
#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
43 |
pcg |
1.1 |
# include <sys/stropts.h> /* for I_PUSH */ |
44 |
|
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#endif |
45 |
pcg |
1.10 |
#ifdef HAVE_ISASTREAM |
46 |
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# include <stropts.h> |
47 |
|
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#endif |
48 |
root |
1.31 |
#if defined(HAVE_PTY_H) |
49 |
root |
1.22 |
# include <pty.h> |
50 |
root |
1.31 |
#elif defined(HAVE_LIBUTIL_H) |
51 |
root |
1.16 |
# include <libutil.h> |
52 |
root |
1.31 |
#elif defined(HAVE_UTIL_H) |
53 |
root |
1.17 |
# include <util.h> |
54 |
pcg |
1.1 |
#endif |
55 |
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|
56 |
root |
1.16 |
#include <cstdio> |
57 |
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#include <grp.h> |
58 |
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|
59 |
pcg |
1.1 |
/* ------------------------------------------------------------------------- * |
60 |
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* GET PSEUDO TELETYPE - MASTER AND SLAVE * |
61 |
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* ------------------------------------------------------------------------- */ |
62 |
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/* |
63 |
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* Returns pty file descriptor, or -1 on failure |
64 |
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* If successful, ttydev is set to the name of the slave device. |
65 |
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* fd_tty _may_ also be set to an open fd to the slave device |
66 |
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*/ |
67 |
root |
1.16 |
static int |
68 |
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get_pty (int *fd_tty, char **ttydev) |
69 |
pcg |
1.1 |
{ |
70 |
pcg |
1.4 |
int pfd; |
71 |
pcg |
1.1 |
|
72 |
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#ifdef PTYS_ARE_OPENPTY |
73 |
root |
1.26 |
char tty_name[sizeof "/dev/pts/????\0"]; |
74 |
pcg |
1.4 |
|
75 |
root |
1.27 |
rxvt_privileges(RESTORE); |
76 |
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int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
77 |
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rxvt_privileges(IGNORE); |
78 |
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|
79 |
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if (res != -1) |
80 |
pcg |
1.4 |
{ |
81 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
82 |
pcg |
1.4 |
return pfd; |
83 |
pcg |
1.1 |
} |
84 |
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#endif |
85 |
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|
86 |
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#ifdef PTYS_ARE__GETPTY |
87 |
pcg |
1.6 |
*ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
88 |
pcg |
1.4 |
if (*ttydev != NULL) |
89 |
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return pfd; |
90 |
pcg |
1.1 |
#endif |
91 |
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|
92 |
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#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
93 |
ayin |
1.34 |
# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) |
94 |
pcg |
1.4 |
|
95 |
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{ |
96 |
ayin |
1.34 |
# ifdef PTYS_ARE_GETPT |
97 |
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pfd = getpt(); |
98 |
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# else |
99 |
root |
1.33 |
# ifdef PTYS_ARE_POSIX |
100 |
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pfd = posix_openpt (O_RDWR); |
101 |
pcg |
1.1 |
# else |
102 |
pcg |
1.6 |
pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
103 |
pcg |
1.1 |
# endif |
104 |
ayin |
1.34 |
# endif |
105 |
pcg |
1.4 |
|
106 |
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if (pfd >= 0) |
107 |
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{ |
108 |
pcg |
1.6 |
if (grantpt (pfd) == 0 /* change slave permissions */ |
109 |
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&& unlockpt (pfd) == 0) |
110 |
pcg |
1.4 |
{ /* slave now unlocked */ |
111 |
root |
1.16 |
*ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
112 |
pcg |
1.4 |
return pfd; |
113 |
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} |
114 |
pcg |
1.6 |
close (pfd); |
115 |
pcg |
1.4 |
} |
116 |
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} |
117 |
pcg |
1.1 |
# endif |
118 |
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#endif |
119 |
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|
120 |
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#ifdef PTYS_ARE_PTC |
121 |
pcg |
1.6 |
if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
122 |
pcg |
1.4 |
{ |
123 |
root |
1.16 |
*ttydev = strdup (ttyname (pfd)); |
124 |
pcg |
1.4 |
return pfd; |
125 |
pcg |
1.1 |
} |
126 |
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#endif |
127 |
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128 |
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#ifdef PTYS_ARE_CLONE |
129 |
pcg |
1.6 |
if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
130 |
pcg |
1.4 |
{ |
131 |
root |
1.16 |
*ttydev = strdup (ptsname (pfd)); |
132 |
pcg |
1.4 |
return pfd; |
133 |
pcg |
1.1 |
} |
134 |
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#endif |
135 |
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136 |
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#ifdef PTYS_ARE_NUMERIC |
137 |
pcg |
1.4 |
{ |
138 |
root |
1.16 |
int idx; |
139 |
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char *c1, *c2; |
140 |
|
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char pty_name[] = "/dev/ptyp???"; |
141 |
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char tty_name[] = "/dev/ttyp???"; |
142 |
pcg |
1.4 |
|
143 |
root |
1.16 |
c1 = &(pty_name[sizeof (pty_name) - 4]); |
144 |
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c2 = &(tty_name[sizeof (tty_name) - 4]); |
145 |
pcg |
1.4 |
for (idx = 0; idx < 256; idx++) |
146 |
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{ |
147 |
pcg |
1.6 |
sprintf (c1, "%d", idx); |
148 |
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sprintf (c2, "%d", idx); |
149 |
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if (access (tty_name, F_OK) < 0) |
150 |
pcg |
1.4 |
{ |
151 |
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idx = 256; |
152 |
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break; |
153 |
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} |
154 |
root |
1.16 |
|
155 |
pcg |
1.6 |
if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
156 |
pcg |
1.4 |
{ |
157 |
pcg |
1.6 |
if (access (tty_name, R_OK | W_OK) == 0) |
158 |
pcg |
1.4 |
{ |
159 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
160 |
pcg |
1.4 |
return pfd; |
161 |
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} |
162 |
root |
1.16 |
|
163 |
pcg |
1.6 |
close (pfd); |
164 |
pcg |
1.4 |
} |
165 |
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} |
166 |
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} |
167 |
pcg |
1.1 |
#endif |
168 |
root |
1.16 |
|
169 |
pcg |
1.1 |
#ifdef PTYS_ARE_SEARCHED |
170 |
pcg |
1.4 |
{ |
171 |
root |
1.16 |
const char *c1, *c2; |
172 |
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char pty_name[] = "/dev/pty??"; |
173 |
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char tty_name[] = "/dev/tty??"; |
174 |
pcg |
1.1 |
|
175 |
|
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# ifndef PTYCHAR1 |
176 |
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# define PTYCHAR1 "pqrstuvwxyz" |
177 |
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# endif |
178 |
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# ifndef PTYCHAR2 |
179 |
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# define PTYCHAR2 "0123456789abcdef" |
180 |
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# endif |
181 |
pcg |
1.4 |
|
182 |
|
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for (c1 = PTYCHAR1; *c1; c1++) |
183 |
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{ |
184 |
pcg |
1.6 |
pty_name[ (sizeof (pty_name) - 3)] = |
185 |
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tty_name[ (sizeof (pty_name) - 3)] = *c1; |
186 |
pcg |
1.4 |
for (c2 = PTYCHAR2; *c2; c2++) |
187 |
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{ |
188 |
pcg |
1.6 |
pty_name[ (sizeof (pty_name) - 2)] = |
189 |
|
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tty_name[ (sizeof (pty_name) - 2)] = *c2; |
190 |
|
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if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
191 |
pcg |
1.4 |
{ |
192 |
pcg |
1.6 |
if (access (tty_name, R_OK | W_OK) == 0) |
193 |
pcg |
1.4 |
{ |
194 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
195 |
pcg |
1.4 |
return pfd; |
196 |
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} |
197 |
root |
1.16 |
|
198 |
pcg |
1.6 |
close (pfd); |
199 |
pcg |
1.4 |
} |
200 |
|
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} |
201 |
|
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} |
202 |
|
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} |
203 |
pcg |
1.1 |
#endif |
204 |
root |
1.16 |
|
205 |
pcg |
1.4 |
return -1; |
206 |
pcg |
1.1 |
} |
207 |
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|
208 |
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/*----------------------------------------------------------------------*/ |
209 |
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/* |
210 |
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* Returns tty file descriptor, or -1 on failure |
211 |
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*/ |
212 |
root |
1.16 |
static int |
213 |
|
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get_tty (char *ttydev) |
214 |
pcg |
1.1 |
{ |
215 |
pcg |
1.4 |
return open (ttydev, O_RDWR | O_NOCTTY, 0); |
216 |
pcg |
1.1 |
} |
217 |
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|
218 |
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/*----------------------------------------------------------------------*/ |
219 |
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/* |
220 |
|
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* Make our tty a controlling tty so that /dev/tty points to us |
221 |
|
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*/ |
222 |
root |
1.16 |
static int |
223 |
|
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control_tty (int fd_tty, const char *ttydev) |
224 |
pcg |
1.1 |
{ |
225 |
|
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#ifndef __QNX__ |
226 |
pcg |
1.4 |
int fd; |
227 |
pcg |
1.1 |
|
228 |
pcg |
1.4 |
/* ---------------------------------------- */ |
229 |
pcg |
1.1 |
# ifdef HAVE_SETSID |
230 |
pcg |
1.4 |
setsid (); |
231 |
pcg |
1.1 |
# endif |
232 |
|
|
# if defined(HAVE_SETPGID) |
233 |
pcg |
1.4 |
setpgid (0, 0); |
234 |
pcg |
1.1 |
# elif defined(HAVE_SETPGRP) |
235 |
pcg |
1.4 |
setpgrp (0, 0); |
236 |
pcg |
1.1 |
# endif |
237 |
root |
1.16 |
|
238 |
pcg |
1.4 |
/* ---------------------------------------- */ |
239 |
pcg |
1.1 |
# ifdef TIOCNOTTY |
240 |
pcg |
1.4 |
fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
241 |
|
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if (fd >= 0) |
242 |
|
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{ |
243 |
|
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ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
244 |
|
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close (fd); |
245 |
pcg |
1.1 |
} |
246 |
|
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# endif |
247 |
root |
1.16 |
|
248 |
pcg |
1.4 |
/* ---------------------------------------- */ |
249 |
|
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fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
250 |
|
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if (fd >= 0) |
251 |
|
|
close (fd); /* ouch: still have controlling tty */ |
252 |
root |
1.16 |
|
253 |
pcg |
1.4 |
/* ---------------------------------------- */ |
254 |
pcg |
1.1 |
#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
255 |
pcg |
1.4 |
/* |
256 |
|
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* Push STREAMS modules: |
257 |
|
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* ptem: pseudo-terminal hardware emulation module. |
258 |
|
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* ldterm: standard terminal line discipline. |
259 |
|
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* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
260 |
|
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* |
261 |
pcg |
1.6 |
* After we push the STREAMS modules, the first open () on the slave side |
262 |
pcg |
1.4 |
* (i.e. the next section between the dashes giving us "tty opened OK") |
263 |
|
|
* should make the "ptem" (or "ldterm" depending upon either which OS |
264 |
|
|
* version or which set of manual pages you have) module give us a |
265 |
pcg |
1.6 |
* controlling terminal. We must already have close ()d the master side |
266 |
pcg |
1.4 |
* fd in this child process before we push STREAMS modules on because the |
267 |
pcg |
1.6 |
* documentation is really unclear about whether it is any close () on |
268 |
|
|
* the master side or the last close () - i.e. a proper STREAMS dismantling |
269 |
|
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* close () - on the master side which causes a hang up to be sent |
270 |
pcg |
1.4 |
* through - Geoff Wing |
271 |
|
|
*/ |
272 |
pcg |
1.1 |
# ifdef HAVE_ISASTREAM |
273 |
pcg |
1.4 |
if (isastream (fd_tty) == 1) |
274 |
pcg |
1.1 |
# endif |
275 |
|
|
{ |
276 |
pcg |
1.4 |
ioctl (fd_tty, I_PUSH, "ptem"); |
277 |
|
|
ioctl (fd_tty, I_PUSH, "ldterm"); |
278 |
|
|
ioctl (fd_tty, I_PUSH, "ttcompat"); |
279 |
pcg |
1.1 |
} |
280 |
|
|
#endif |
281 |
pcg |
1.4 |
/* ---------------------------------------- */ |
282 |
pcg |
1.1 |
# if defined(TIOCSCTTY) |
283 |
pcg |
1.4 |
fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
284 |
pcg |
1.1 |
# elif defined(TIOCSETCTTY) |
285 |
pcg |
1.4 |
fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
286 |
pcg |
1.1 |
# else |
287 |
pcg |
1.4 |
fd = open (ttydev, O_RDWR); |
288 |
|
|
if (fd >= 0) |
289 |
pcg |
1.6 |
close (fd); |
290 |
pcg |
1.1 |
# endif |
291 |
pcg |
1.4 |
/* ---------------------------------------- */ |
292 |
|
|
fd = open ("/dev/tty", O_WRONLY); |
293 |
|
|
if (fd < 0) |
294 |
|
|
return -1; /* fatal */ |
295 |
|
|
close (fd); |
296 |
|
|
/* ---------------------------------------- */ |
297 |
pcg |
1.1 |
#endif /* ! __QNX__ */ |
298 |
pcg |
1.4 |
|
299 |
|
|
return 0; |
300 |
pcg |
1.1 |
} |
301 |
root |
1.16 |
|
302 |
|
|
#ifndef NO_SETOWNER_TTYDEV |
303 |
|
|
static struct ttyconf { |
304 |
|
|
gid_t gid; |
305 |
|
|
mode_t mode; |
306 |
|
|
|
307 |
|
|
ttyconf () |
308 |
|
|
{ |
309 |
|
|
#ifdef TTY_GID_SUPPORT |
310 |
|
|
struct group *gr = getgrnam ("tty"); |
311 |
|
|
|
312 |
|
|
if (gr) |
313 |
|
|
{ /* change group ownership of tty to "tty" */ |
314 |
|
|
mode = S_IRUSR | S_IWUSR | S_IWGRP; |
315 |
|
|
gid = gr->gr_gid; |
316 |
|
|
} |
317 |
|
|
else |
318 |
|
|
#endif /* TTY_GID_SUPPORT */ |
319 |
|
|
{ |
320 |
|
|
mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
321 |
|
|
gid = getgid (); |
322 |
|
|
} |
323 |
|
|
} |
324 |
|
|
} ttyconf; |
325 |
|
|
|
326 |
|
|
void |
327 |
|
|
rxvt_ptytty::privileges (rxvt_privaction action) |
328 |
|
|
{ |
329 |
root |
1.26 |
if (!name || !*name) |
330 |
root |
1.23 |
return; |
331 |
|
|
|
332 |
root |
1.16 |
rxvt_privileges (RESTORE); |
333 |
|
|
|
334 |
|
|
if (action == SAVE) |
335 |
|
|
{ |
336 |
|
|
# ifndef RESET_TTY_TO_COMMON_DEFAULTS |
337 |
|
|
/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
338 |
|
|
if (lstat (name, &savestat) < 0) /* you lose out */ |
339 |
root |
1.26 |
; |
340 |
root |
1.16 |
else |
341 |
|
|
# endif |
342 |
|
|
{ |
343 |
root |
1.26 |
saved = true; |
344 |
root |
1.16 |
chown (name, getuid (), ttyconf.gid); /* fail silently */ |
345 |
|
|
chmod (name, ttyconf.mode); |
346 |
|
|
# ifdef HAVE_REVOKE |
347 |
|
|
revoke (name); |
348 |
|
|
# endif |
349 |
|
|
} |
350 |
|
|
} |
351 |
|
|
else |
352 |
|
|
{ /* action == RESTORE */ |
353 |
|
|
# ifndef RESET_TTY_TO_COMMON_DEFAULTS |
354 |
root |
1.26 |
if (saved) |
355 |
|
|
{ |
356 |
|
|
chmod (name, savestat.st_mode); |
357 |
|
|
chown (name, savestat.st_uid, savestat.st_gid); |
358 |
|
|
} |
359 |
root |
1.16 |
# else |
360 |
|
|
chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
361 |
|
|
chown (name, 0, 0); |
362 |
|
|
# endif |
363 |
|
|
|
364 |
|
|
} |
365 |
|
|
|
366 |
|
|
rxvt_privileges (IGNORE); |
367 |
|
|
} |
368 |
|
|
#endif |
369 |
|
|
|
370 |
|
|
rxvt_ptytty::rxvt_ptytty () |
371 |
|
|
{ |
372 |
|
|
pty = tty = -1; |
373 |
|
|
name = 0; |
374 |
root |
1.26 |
#ifndef NO_SETOWNER_TTYDEV |
375 |
|
|
saved = false; |
376 |
|
|
#endif |
377 |
root |
1.35 |
#if UTMP_SUPPORT |
378 |
|
|
cmd_pid = 0; |
379 |
|
|
#endif |
380 |
root |
1.16 |
} |
381 |
|
|
|
382 |
|
|
rxvt_ptytty::~rxvt_ptytty () |
383 |
|
|
{ |
384 |
root |
1.35 |
logout (); |
385 |
root |
1.16 |
put (); |
386 |
|
|
} |
387 |
|
|
|
388 |
|
|
void |
389 |
|
|
|
390 |
|
|
rxvt_ptytty::close_tty () |
391 |
|
|
{ |
392 |
root |
1.29 |
if (tty < 0) |
393 |
|
|
return; |
394 |
|
|
|
395 |
|
|
close (tty); |
396 |
root |
1.16 |
tty = -1; |
397 |
|
|
} |
398 |
|
|
|
399 |
|
|
void |
400 |
|
|
rxvt_ptytty::put () |
401 |
|
|
{ |
402 |
|
|
#ifndef NO_SETOWNER_TTYDEV |
403 |
root |
1.28 |
privileges (RESTORE); |
404 |
root |
1.16 |
#endif |
405 |
|
|
|
406 |
|
|
if (pty >= 0) close (pty); |
407 |
|
|
close_tty (); |
408 |
|
|
free (name); |
409 |
|
|
|
410 |
|
|
pty = tty = -1; |
411 |
|
|
name = 0; |
412 |
|
|
} |
413 |
|
|
|
414 |
|
|
bool |
415 |
|
|
rxvt_ptytty::make_controlling_tty () |
416 |
|
|
{ |
417 |
|
|
return control_tty (tty, name) >= 0; |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
bool |
421 |
|
|
rxvt_ptytty::get () |
422 |
|
|
{ |
423 |
|
|
/* get master (pty) */ |
424 |
|
|
if ((pty = get_pty (&tty, &name)) < 0) |
425 |
|
|
return false; |
426 |
|
|
|
427 |
|
|
fcntl (pty, F_SETFL, O_NONBLOCK); |
428 |
|
|
|
429 |
|
|
/* get slave (tty) */ |
430 |
|
|
if (tty < 0) |
431 |
|
|
{ |
432 |
|
|
#ifndef NO_SETOWNER_TTYDEV |
433 |
|
|
privileges (SAVE); |
434 |
|
|
#endif |
435 |
|
|
|
436 |
|
|
if ((tty = get_tty (name)) < 0) |
437 |
|
|
{ |
438 |
|
|
put (); |
439 |
|
|
return false; |
440 |
|
|
} |
441 |
|
|
} |
442 |
|
|
|
443 |
|
|
return true; |
444 |
|
|
} |
445 |
|
|
|
446 |
root |
1.22 |
void |
447 |
|
|
rxvt_ptytty::set_utf8_mode (bool on) |
448 |
|
|
{ |
449 |
|
|
#ifdef IUTF8 |
450 |
root |
1.29 |
if (pty < 0) |
451 |
|
|
return; |
452 |
|
|
|
453 |
|
|
struct termios tio; |
454 |
|
|
|
455 |
|
|
if (tcgetattr (pty, &tio) != -1) |
456 |
root |
1.22 |
{ |
457 |
root |
1.29 |
tcflag_t new_cflag = tio.c_iflag; |
458 |
|
|
|
459 |
|
|
if (on) |
460 |
|
|
new_cflag |= IUTF8; |
461 |
|
|
else |
462 |
|
|
new_cflag &= ~IUTF8; |
463 |
root |
1.22 |
|
464 |
root |
1.29 |
if (new_cflag != tio.c_iflag) |
465 |
root |
1.22 |
{ |
466 |
root |
1.29 |
tio.c_iflag = new_cflag; |
467 |
|
|
tcsetattr (pty, TCSANOW, &tio); |
468 |
root |
1.22 |
} |
469 |
|
|
} |
470 |
|
|
#endif |
471 |
|
|
} |
472 |
|
|
|
473 |
pcg |
1.1 |
/*----------------------- end-of-file (C source) -----------------------*/ |
474 |
root |
1.16 |
|