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 |
root |
1.36 |
///////////////////////////////////////////////////////////////////////////// |
60 |
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61 |
pcg |
1.1 |
/* ------------------------------------------------------------------------- * |
62 |
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* GET PSEUDO TELETYPE - MASTER AND SLAVE * |
63 |
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* ------------------------------------------------------------------------- */ |
64 |
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/* |
65 |
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* Returns pty file descriptor, or -1 on failure |
66 |
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* If successful, ttydev is set to the name of the slave device. |
67 |
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* fd_tty _may_ also be set to an open fd to the slave device |
68 |
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*/ |
69 |
root |
1.16 |
static int |
70 |
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get_pty (int *fd_tty, char **ttydev) |
71 |
pcg |
1.1 |
{ |
72 |
pcg |
1.4 |
int pfd; |
73 |
pcg |
1.1 |
|
74 |
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#ifdef PTYS_ARE_OPENPTY |
75 |
root |
1.26 |
char tty_name[sizeof "/dev/pts/????\0"]; |
76 |
pcg |
1.4 |
|
77 |
root |
1.27 |
rxvt_privileges(RESTORE); |
78 |
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int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
79 |
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rxvt_privileges(IGNORE); |
80 |
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|
81 |
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if (res != -1) |
82 |
pcg |
1.4 |
{ |
83 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
84 |
pcg |
1.4 |
return pfd; |
85 |
pcg |
1.1 |
} |
86 |
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#endif |
87 |
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|
88 |
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#ifdef PTYS_ARE__GETPTY |
89 |
pcg |
1.6 |
*ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
90 |
pcg |
1.4 |
if (*ttydev != NULL) |
91 |
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return pfd; |
92 |
pcg |
1.1 |
#endif |
93 |
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|
94 |
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#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
95 |
ayin |
1.34 |
# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) |
96 |
pcg |
1.4 |
|
97 |
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{ |
98 |
ayin |
1.34 |
# ifdef PTYS_ARE_GETPT |
99 |
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pfd = getpt(); |
100 |
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# else |
101 |
root |
1.33 |
# ifdef PTYS_ARE_POSIX |
102 |
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pfd = posix_openpt (O_RDWR); |
103 |
pcg |
1.1 |
# else |
104 |
pcg |
1.6 |
pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
105 |
pcg |
1.1 |
# endif |
106 |
ayin |
1.34 |
# endif |
107 |
pcg |
1.4 |
|
108 |
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if (pfd >= 0) |
109 |
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{ |
110 |
pcg |
1.6 |
if (grantpt (pfd) == 0 /* change slave permissions */ |
111 |
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&& unlockpt (pfd) == 0) |
112 |
pcg |
1.4 |
{ /* slave now unlocked */ |
113 |
root |
1.16 |
*ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
114 |
pcg |
1.4 |
return pfd; |
115 |
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} |
116 |
pcg |
1.6 |
close (pfd); |
117 |
pcg |
1.4 |
} |
118 |
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} |
119 |
pcg |
1.1 |
# endif |
120 |
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#endif |
121 |
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122 |
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#ifdef PTYS_ARE_PTC |
123 |
pcg |
1.6 |
if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
124 |
pcg |
1.4 |
{ |
125 |
root |
1.16 |
*ttydev = strdup (ttyname (pfd)); |
126 |
pcg |
1.4 |
return pfd; |
127 |
pcg |
1.1 |
} |
128 |
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#endif |
129 |
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130 |
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#ifdef PTYS_ARE_CLONE |
131 |
pcg |
1.6 |
if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
132 |
pcg |
1.4 |
{ |
133 |
root |
1.16 |
*ttydev = strdup (ptsname (pfd)); |
134 |
pcg |
1.4 |
return pfd; |
135 |
pcg |
1.1 |
} |
136 |
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#endif |
137 |
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138 |
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#ifdef PTYS_ARE_NUMERIC |
139 |
pcg |
1.4 |
{ |
140 |
root |
1.16 |
int idx; |
141 |
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char *c1, *c2; |
142 |
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char pty_name[] = "/dev/ptyp???"; |
143 |
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char tty_name[] = "/dev/ttyp???"; |
144 |
pcg |
1.4 |
|
145 |
root |
1.16 |
c1 = &(pty_name[sizeof (pty_name) - 4]); |
146 |
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c2 = &(tty_name[sizeof (tty_name) - 4]); |
147 |
pcg |
1.4 |
for (idx = 0; idx < 256; idx++) |
148 |
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{ |
149 |
pcg |
1.6 |
sprintf (c1, "%d", idx); |
150 |
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sprintf (c2, "%d", idx); |
151 |
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if (access (tty_name, F_OK) < 0) |
152 |
pcg |
1.4 |
{ |
153 |
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idx = 256; |
154 |
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break; |
155 |
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} |
156 |
root |
1.16 |
|
157 |
pcg |
1.6 |
if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
158 |
pcg |
1.4 |
{ |
159 |
pcg |
1.6 |
if (access (tty_name, R_OK | W_OK) == 0) |
160 |
pcg |
1.4 |
{ |
161 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
162 |
pcg |
1.4 |
return pfd; |
163 |
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} |
164 |
root |
1.16 |
|
165 |
pcg |
1.6 |
close (pfd); |
166 |
pcg |
1.4 |
} |
167 |
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} |
168 |
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} |
169 |
pcg |
1.1 |
#endif |
170 |
root |
1.16 |
|
171 |
pcg |
1.1 |
#ifdef PTYS_ARE_SEARCHED |
172 |
pcg |
1.4 |
{ |
173 |
root |
1.16 |
const char *c1, *c2; |
174 |
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char pty_name[] = "/dev/pty??"; |
175 |
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char tty_name[] = "/dev/tty??"; |
176 |
pcg |
1.1 |
|
177 |
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# ifndef PTYCHAR1 |
178 |
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# define PTYCHAR1 "pqrstuvwxyz" |
179 |
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# endif |
180 |
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# ifndef PTYCHAR2 |
181 |
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# define PTYCHAR2 "0123456789abcdef" |
182 |
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# endif |
183 |
pcg |
1.4 |
|
184 |
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for (c1 = PTYCHAR1; *c1; c1++) |
185 |
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{ |
186 |
pcg |
1.6 |
pty_name[ (sizeof (pty_name) - 3)] = |
187 |
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tty_name[ (sizeof (pty_name) - 3)] = *c1; |
188 |
pcg |
1.4 |
for (c2 = PTYCHAR2; *c2; c2++) |
189 |
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{ |
190 |
pcg |
1.6 |
pty_name[ (sizeof (pty_name) - 2)] = |
191 |
|
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tty_name[ (sizeof (pty_name) - 2)] = *c2; |
192 |
|
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if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
193 |
pcg |
1.4 |
{ |
194 |
pcg |
1.6 |
if (access (tty_name, R_OK | W_OK) == 0) |
195 |
pcg |
1.4 |
{ |
196 |
pcg |
1.6 |
*ttydev = strdup (tty_name); |
197 |
pcg |
1.4 |
return pfd; |
198 |
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} |
199 |
root |
1.16 |
|
200 |
pcg |
1.6 |
close (pfd); |
201 |
pcg |
1.4 |
} |
202 |
|
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} |
203 |
|
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} |
204 |
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} |
205 |
pcg |
1.1 |
#endif |
206 |
root |
1.16 |
|
207 |
pcg |
1.4 |
return -1; |
208 |
pcg |
1.1 |
} |
209 |
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|
210 |
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/*----------------------------------------------------------------------*/ |
211 |
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/* |
212 |
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* Returns tty file descriptor, or -1 on failure |
213 |
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*/ |
214 |
root |
1.16 |
static int |
215 |
|
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get_tty (char *ttydev) |
216 |
pcg |
1.1 |
{ |
217 |
pcg |
1.4 |
return open (ttydev, O_RDWR | O_NOCTTY, 0); |
218 |
pcg |
1.1 |
} |
219 |
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|
220 |
|
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/*----------------------------------------------------------------------*/ |
221 |
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/* |
222 |
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* Make our tty a controlling tty so that /dev/tty points to us |
223 |
|
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*/ |
224 |
root |
1.16 |
static int |
225 |
root |
1.36 |
control_tty (int fd_tty) |
226 |
pcg |
1.1 |
{ |
227 |
pcg |
1.4 |
int fd; |
228 |
pcg |
1.1 |
|
229 |
pcg |
1.4 |
/* ---------------------------------------- */ |
230 |
|
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setsid (); |
231 |
root |
1.16 |
|
232 |
pcg |
1.4 |
/* ---------------------------------------- */ |
233 |
root |
1.36 |
# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
234 |
pcg |
1.4 |
/* |
235 |
|
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* Push STREAMS modules: |
236 |
|
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* ptem: pseudo-terminal hardware emulation module. |
237 |
|
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* ldterm: standard terminal line discipline. |
238 |
|
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* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
239 |
|
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* |
240 |
pcg |
1.6 |
* After we push the STREAMS modules, the first open () on the slave side |
241 |
pcg |
1.4 |
* (i.e. the next section between the dashes giving us "tty opened OK") |
242 |
|
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* should make the "ptem" (or "ldterm" depending upon either which OS |
243 |
|
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* version or which set of manual pages you have) module give us a |
244 |
pcg |
1.6 |
* controlling terminal. We must already have close ()d the master side |
245 |
pcg |
1.4 |
* fd in this child process before we push STREAMS modules on because the |
246 |
pcg |
1.6 |
* documentation is really unclear about whether it is any close () on |
247 |
|
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* the master side or the last close () - i.e. a proper STREAMS dismantling |
248 |
|
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* close () - on the master side which causes a hang up to be sent |
249 |
pcg |
1.4 |
* through - Geoff Wing |
250 |
|
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*/ |
251 |
root |
1.36 |
# ifdef HAVE_ISASTREAM |
252 |
pcg |
1.4 |
if (isastream (fd_tty) == 1) |
253 |
root |
1.36 |
# endif |
254 |
pcg |
1.1 |
{ |
255 |
pcg |
1.4 |
ioctl (fd_tty, I_PUSH, "ptem"); |
256 |
|
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ioctl (fd_tty, I_PUSH, "ldterm"); |
257 |
|
|
ioctl (fd_tty, I_PUSH, "ttcompat"); |
258 |
pcg |
1.1 |
} |
259 |
root |
1.36 |
# endif |
260 |
pcg |
1.4 |
/* ---------------------------------------- */ |
261 |
|
|
fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
262 |
|
|
/* ---------------------------------------- */ |
263 |
|
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fd = open ("/dev/tty", O_WRONLY); |
264 |
|
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if (fd < 0) |
265 |
|
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return -1; /* fatal */ |
266 |
|
|
close (fd); |
267 |
|
|
/* ---------------------------------------- */ |
268 |
|
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|
269 |
|
|
return 0; |
270 |
pcg |
1.1 |
} |
271 |
root |
1.16 |
|
272 |
root |
1.36 |
void |
273 |
|
|
rxvt_ptytty::close_tty () |
274 |
|
|
{ |
275 |
|
|
if (tty < 0) |
276 |
|
|
return; |
277 |
|
|
|
278 |
|
|
close (tty); |
279 |
|
|
tty = -1; |
280 |
|
|
} |
281 |
|
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|
282 |
|
|
bool |
283 |
|
|
rxvt_ptytty::make_controlling_tty () |
284 |
|
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{ |
285 |
|
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return control_tty (tty) >= 0; |
286 |
|
|
} |
287 |
|
|
|
288 |
|
|
void |
289 |
|
|
rxvt_ptytty::set_utf8_mode (bool on) |
290 |
|
|
{ |
291 |
|
|
#ifdef IUTF8 |
292 |
|
|
if (pty < 0) |
293 |
|
|
return; |
294 |
|
|
|
295 |
|
|
struct termios tio; |
296 |
|
|
|
297 |
|
|
if (tcgetattr (pty, &tio) != -1) |
298 |
|
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{ |
299 |
|
|
tcflag_t new_cflag = tio.c_iflag; |
300 |
|
|
|
301 |
|
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if (on) |
302 |
|
|
new_cflag |= IUTF8; |
303 |
|
|
else |
304 |
|
|
new_cflag &= ~IUTF8; |
305 |
|
|
|
306 |
|
|
if (new_cflag != tio.c_iflag) |
307 |
|
|
{ |
308 |
|
|
tio.c_iflag = new_cflag; |
309 |
|
|
tcsetattr (pty, TCSANOW, &tio); |
310 |
|
|
} |
311 |
|
|
} |
312 |
|
|
#endif |
313 |
|
|
} |
314 |
|
|
|
315 |
|
|
///////////////////////////////////////////////////////////////////////////// |
316 |
|
|
|
317 |
root |
1.16 |
#ifndef NO_SETOWNER_TTYDEV |
318 |
|
|
static struct ttyconf { |
319 |
|
|
gid_t gid; |
320 |
|
|
mode_t mode; |
321 |
|
|
|
322 |
|
|
ttyconf () |
323 |
|
|
{ |
324 |
|
|
#ifdef TTY_GID_SUPPORT |
325 |
|
|
struct group *gr = getgrnam ("tty"); |
326 |
|
|
|
327 |
|
|
if (gr) |
328 |
|
|
{ /* change group ownership of tty to "tty" */ |
329 |
|
|
mode = S_IRUSR | S_IWUSR | S_IWGRP; |
330 |
|
|
gid = gr->gr_gid; |
331 |
|
|
} |
332 |
|
|
else |
333 |
|
|
#endif /* TTY_GID_SUPPORT */ |
334 |
|
|
{ |
335 |
|
|
mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
336 |
|
|
gid = getgid (); |
337 |
|
|
} |
338 |
|
|
} |
339 |
|
|
} ttyconf; |
340 |
|
|
|
341 |
root |
1.36 |
///////////////////////////////////////////////////////////////////////////// |
342 |
|
|
|
343 |
root |
1.16 |
void |
344 |
root |
1.36 |
rxvt_ptytty_unix::privileges (rxvt_privaction action) |
345 |
root |
1.16 |
{ |
346 |
root |
1.26 |
if (!name || !*name) |
347 |
root |
1.23 |
return; |
348 |
|
|
|
349 |
root |
1.16 |
rxvt_privileges (RESTORE); |
350 |
|
|
|
351 |
|
|
if (action == SAVE) |
352 |
|
|
{ |
353 |
|
|
# ifndef RESET_TTY_TO_COMMON_DEFAULTS |
354 |
|
|
/* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
355 |
|
|
if (lstat (name, &savestat) < 0) /* you lose out */ |
356 |
root |
1.26 |
; |
357 |
root |
1.16 |
else |
358 |
|
|
# endif |
359 |
|
|
{ |
360 |
root |
1.26 |
saved = true; |
361 |
root |
1.16 |
chown (name, getuid (), ttyconf.gid); /* fail silently */ |
362 |
|
|
chmod (name, ttyconf.mode); |
363 |
|
|
# ifdef HAVE_REVOKE |
364 |
|
|
revoke (name); |
365 |
|
|
# endif |
366 |
|
|
} |
367 |
|
|
} |
368 |
|
|
else |
369 |
|
|
{ /* action == RESTORE */ |
370 |
|
|
# ifndef RESET_TTY_TO_COMMON_DEFAULTS |
371 |
root |
1.26 |
if (saved) |
372 |
|
|
{ |
373 |
|
|
chmod (name, savestat.st_mode); |
374 |
|
|
chown (name, savestat.st_uid, savestat.st_gid); |
375 |
|
|
} |
376 |
root |
1.16 |
# else |
377 |
|
|
chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
378 |
|
|
chown (name, 0, 0); |
379 |
|
|
# endif |
380 |
|
|
|
381 |
|
|
} |
382 |
|
|
|
383 |
|
|
rxvt_privileges (IGNORE); |
384 |
|
|
} |
385 |
|
|
#endif |
386 |
|
|
|
387 |
root |
1.36 |
rxvt_ptytty_unix::rxvt_ptytty_unix () |
388 |
root |
1.16 |
{ |
389 |
|
|
pty = tty = -1; |
390 |
|
|
name = 0; |
391 |
root |
1.26 |
#ifndef NO_SETOWNER_TTYDEV |
392 |
|
|
saved = false; |
393 |
|
|
#endif |
394 |
root |
1.35 |
#if UTMP_SUPPORT |
395 |
|
|
cmd_pid = 0; |
396 |
|
|
#endif |
397 |
root |
1.16 |
} |
398 |
|
|
|
399 |
root |
1.36 |
rxvt_ptytty_unix::~rxvt_ptytty_unix () |
400 |
root |
1.16 |
{ |
401 |
root |
1.35 |
logout (); |
402 |
root |
1.16 |
put (); |
403 |
|
|
} |
404 |
|
|
|
405 |
|
|
void |
406 |
root |
1.36 |
rxvt_ptytty_unix::put () |
407 |
root |
1.16 |
{ |
408 |
|
|
#ifndef NO_SETOWNER_TTYDEV |
409 |
root |
1.28 |
privileges (RESTORE); |
410 |
root |
1.16 |
#endif |
411 |
|
|
|
412 |
|
|
if (pty >= 0) close (pty); |
413 |
|
|
close_tty (); |
414 |
|
|
free (name); |
415 |
|
|
|
416 |
|
|
pty = tty = -1; |
417 |
|
|
name = 0; |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
bool |
421 |
root |
1.36 |
rxvt_ptytty_unix::get () |
422 |
root |
1.16 |
{ |
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 |
pcg |
1.1 |
/*----------------------- end-of-file (C source) -----------------------*/ |
447 |
root |
1.16 |
|