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1 | // This file is part of libptytty. Do not make local modifications. |
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2 | // http://software.schmorp.de/pkg/libptytty |
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3 | |
1 | /*--------------------------------*-C-*---------------------------------* |
4 | /*----------------------------------------------------------------------* |
2 | * File: ptytty.C |
5 | * File: ptytty.C |
3 | *----------------------------------------------------------------------* |
6 | *----------------------------------------------------------------------* |
4 | * |
7 | * |
5 | * All portions of code are copyright by their respective author/s. |
8 | * All portions of code are copyright by their respective author/s. |
6 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
7 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
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11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
8 | * |
12 | * |
9 | * This program is free software; you can redistribute it and/or modify |
13 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
14 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2 of the License, or |
15 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
16 | * (at your option) any later version. |
… | |
… | |
19 | * You should have received a copy of the GNU General Public License |
23 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
24 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | *---------------------------------------------------------------------*/ |
26 | *---------------------------------------------------------------------*/ |
23 | |
27 | |
24 | #include "../config.h" /* NECESSARY */ |
28 | #include "../config.h" |
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29 | |
25 | #include "rxvt.h" |
30 | #include "ptytty.h" |
26 | |
31 | |
27 | #include <cstdlib> |
32 | #include <cstdlib> |
28 | #include <cstring> |
33 | #include <cstring> |
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34 | #include <csignal> |
29 | |
35 | |
30 | #include <sys/types.h> |
36 | #include <sys/types.h> |
31 | #include <sys/socket.h> |
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32 | #include <unistd.h> |
37 | #include <unistd.h> |
33 | #include <fcntl.h> |
38 | #include <fcntl.h> |
34 | |
39 | |
35 | #ifdef HAVE_SYS_IOCTL_H |
40 | #ifdef HAVE_SYS_IOCTL_H |
36 | # include <sys/ioctl.h> |
41 | # include <sys/ioctl.h> |
37 | #endif |
42 | #endif |
38 | #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
43 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
39 | # include <sys/stropts.h> /* for I_PUSH */ |
44 | # include <sys/stropts.h> /* for I_PUSH */ |
40 | #endif |
45 | #endif |
41 | #ifdef HAVE_ISASTREAM |
46 | #ifdef HAVE_ISASTREAM |
42 | # include <stropts.h> |
47 | # include <stropts.h> |
43 | #endif |
48 | #endif |
… | |
… | |
46 | #elif defined(HAVE_LIBUTIL_H) |
51 | #elif defined(HAVE_LIBUTIL_H) |
47 | # include <libutil.h> |
52 | # include <libutil.h> |
48 | #elif defined(HAVE_UTIL_H) |
53 | #elif defined(HAVE_UTIL_H) |
49 | # include <util.h> |
54 | # include <util.h> |
50 | #endif |
55 | #endif |
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56 | #ifdef TTY_GID_SUPPORT |
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57 | #include <grp.h> |
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58 | #endif |
51 | |
59 | |
52 | #include <cstdio> |
60 | #include <cstdio> |
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" |
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58 | |
61 | |
59 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
60 | |
63 | |
61 | /* ------------------------------------------------------------------------- * |
64 | /* ------------------------------------------------------------------------- * |
62 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
… | |
… | |
64 | /* |
67 | /* |
65 | * Returns pty file descriptor, or -1 on failure |
68 | * Returns pty file descriptor, or -1 on failure |
66 | * If successful, ttydev is set to the name of the slave device. |
69 | * If successful, ttydev is set to the name of the slave device. |
67 | * fd_tty _may_ also be set to an open fd to the slave device |
70 | * fd_tty _may_ also be set to an open fd to the slave device |
68 | */ |
71 | */ |
69 | static inline int |
72 | #if defined(UNIX98_PTY) |
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73 | |
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74 | static int |
70 | get_pty_streams (int *fd_tty, char **ttydev) |
75 | get_pty (int *fd_tty, char **ttydev) |
71 | { |
76 | { |
72 | #ifdef NO_SETOWNER_TTYDEV |
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73 | int pfd; |
77 | int pfd; |
74 | |
78 | |
75 | # if defined(PTYS_ARE_GETPT) |
79 | # if defined(HAVE_GETPT) |
76 | pfd = getpt(); |
80 | pfd = getpt(); |
77 | # elif defined(PTYS_ARE_POSIX) |
81 | # elif defined(HAVE_POSIX_OPENPT) |
78 | pfd = posix_openpt (O_RDWR); |
82 | pfd = posix_openpt (O_RDWR); |
79 | # else |
83 | # else |
80 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
84 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
81 | # endif |
85 | # endif |
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86 | |
82 | if (pfd >= 0) |
87 | if (pfd >= 0) |
83 | { |
88 | { |
84 | if (grantpt (pfd) == 0 /* change slave permissions */ |
89 | if (grantpt (pfd) == 0 /* change slave permissions */ |
85 | && unlockpt (pfd) == 0) |
90 | && unlockpt (pfd) == 0) |
86 | { /* slave now unlocked */ |
91 | { /* slave now unlocked */ |
87 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
92 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
88 | return pfd; |
93 | return pfd; |
89 | } |
94 | } |
90 | |
95 | |
91 | close (pfd); |
96 | close (pfd); |
92 | } |
97 | } |
93 | #endif |
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94 | |
98 | |
95 | return -1; |
99 | return -1; |
96 | } |
100 | } |
97 | |
101 | |
98 | static inline int |
102 | #elif defined(HAVE_OPENPTY) |
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103 | |
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104 | static int |
99 | get_pty_openpty (int *fd_tty, char **ttydev) |
105 | get_pty (int *fd_tty, char **ttydev) |
100 | { |
106 | { |
101 | #ifdef PTYS_ARE_OPENPTY |
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102 | int pfd; |
107 | int pfd; |
103 | int res; |
108 | int res; |
104 | char tty_name[sizeof "/dev/pts/????\0"]; |
109 | char tty_name[32]; |
105 | |
110 | |
106 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
111 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
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112 | |
107 | if (res != -1) |
113 | if (res != -1) |
108 | { |
114 | { |
109 | *ttydev = strdup (tty_name); |
115 | *ttydev = strdup (tty_name); |
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116 | return pfd; |
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117 | } |
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118 | |
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119 | return -1; |
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120 | } |
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121 | |
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122 | #elif defined(HAVE__GETPTY) |
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123 | |
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124 | static int |
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125 | get_pty (int *fd_tty, char **ttydev) |
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126 | { |
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127 | int pfd; |
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128 | |
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129 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
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130 | |
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131 | if (*ttydev != NULL) |
110 | return pfd; |
132 | return pfd; |
111 | } |
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112 | #endif |
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113 | |
133 | |
114 | return -1; |
134 | return -1; |
115 | } |
135 | } |
116 | |
136 | |
117 | static inline int |
137 | #elif defined(HAVE_DEV_PTC) |
118 | get_pty__getpty (int *fd_tty, char **ttydev) |
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119 | { |
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120 | #ifdef PTYS_ARE__GETPTY |
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121 | int pfd; |
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122 | |
138 | |
123 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
139 | static int |
124 | if (*ttydev != NULL) |
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125 | return pfd; |
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126 | #endif |
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127 | |
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128 | return -1; |
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129 | } |
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130 | |
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131 | static inline int |
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132 | get_pty_ptc (int *fd_tty, char **ttydev) |
140 | get_pty (int *fd_tty, char **ttydev) |
133 | { |
141 | { |
134 | #ifdef PTYS_ARE_PTC |
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135 | int pfd; |
142 | int pfd; |
136 | |
143 | |
137 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
144 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
138 | { |
145 | { |
139 | *ttydev = strdup (ttyname (pfd)); |
146 | *ttydev = strdup (ttyname (pfd)); |
140 | return pfd; |
147 | return pfd; |
141 | } |
148 | } |
142 | #endif |
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143 | |
149 | |
144 | return -1; |
150 | return -1; |
145 | } |
151 | } |
146 | |
152 | |
147 | static inline int |
153 | #elif defined(HAVE_DEV_CLONE) |
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154 | |
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155 | static int |
148 | get_pty_clone (int *fd_tty, char **ttydev) |
156 | get_pty (int *fd_tty, char **ttydev) |
149 | { |
157 | { |
150 | #ifdef PTYS_ARE_CLONE |
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151 | int pfd; |
158 | int pfd; |
152 | |
159 | |
153 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
160 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
154 | { |
161 | { |
155 | *ttydev = strdup (ptsname (pfd)); |
162 | *ttydev = strdup (ptsname (pfd)); |
156 | return pfd; |
163 | return pfd; |
157 | } |
164 | } |
158 | #endif |
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159 | |
165 | |
160 | return -1; |
166 | return -1; |
161 | } |
167 | } |
162 | |
168 | |
163 | static inline int |
169 | #else |
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170 | |
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171 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
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172 | static int |
164 | get_pty_numeric (int *fd_tty, char **ttydev) |
173 | get_pty (int *fd_tty, char **ttydev) |
165 | { |
174 | { |
166 | #ifdef PTYS_ARE_NUMERIC |
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167 | int pfd; |
175 | int pfd; |
168 | int idx; |
176 | int i; |
169 | char *c1, *c2; |
177 | char pty_name[32]; |
170 | char pty_name[] = "/dev/ptyp???"; |
178 | char tty_name[32]; |
171 | char tty_name[] = "/dev/ttyp???"; |
179 | const char *majors = "pqrstuvwxyzabcde"; |
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180 | const char *minors = "0123456789abcdef"; |
172 | |
181 | |
173 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
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174 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
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175 | |
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176 | for (idx = 0; idx < 256; idx++) |
182 | for (i = 0; i < 256; i++) |
177 | { |
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178 | sprintf (c1, "%d", idx); |
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179 | sprintf (c2, "%d", idx); |
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180 | |
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181 | if (access (tty_name, F_OK) < 0) |
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182 | { |
183 | { |
183 | idx = 256; |
184 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
184 | break; |
185 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
185 | } |
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186 | |
186 | |
187 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
187 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
188 | { |
188 | { |
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189 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
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190 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
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191 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
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192 | continue; |
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193 | } |
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194 | |
189 | if (access (tty_name, R_OK | W_OK) == 0) |
195 | if (access (tty_name, R_OK | W_OK) == 0) |
190 | { |
196 | { |
191 | *ttydev = strdup (tty_name); |
197 | *ttydev = strdup (tty_name); |
192 | return pfd; |
198 | return pfd; |
193 | } |
199 | } |
194 | |
200 | |
195 | close (pfd); |
201 | close (pfd); |
196 | } |
202 | } |
197 | } |
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198 | #endif |
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199 | |
203 | |
200 | return -1; |
204 | return -1; |
201 | } |
205 | } |
202 | |
206 | |
203 | static inline int |
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204 | get_pty_searched (int *fd_tty, char **ttydev) |
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205 | { |
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206 | #ifdef PTYS_ARE_SEARCHED |
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207 | # ifndef PTYCHAR1 |
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208 | # define PTYCHAR1 "pqrstuvwxyz" |
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209 | # endif |
207 | #endif |
210 | # ifndef PTYCHAR2 |
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211 | # define PTYCHAR2 "0123456789abcdef" |
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212 | # endif |
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213 | int pfd; |
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214 | const char *c1, *c2; |
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215 | char pty_name[] = "/dev/pty??"; |
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216 | char tty_name[] = "/dev/tty??"; |
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217 | |
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218 | for (c1 = PTYCHAR1; *c1; c1++) |
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219 | { |
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220 | pty_name[ (sizeof (pty_name) - 3)] = |
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221 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
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222 | |
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223 | for (c2 = PTYCHAR2; *c2; c2++) |
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224 | { |
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225 | pty_name[ (sizeof (pty_name) - 2)] = |
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226 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
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227 | |
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228 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
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229 | { |
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230 | if (access (tty_name, R_OK | W_OK) == 0) |
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231 | { |
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232 | *ttydev = strdup (tty_name); |
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233 | return pfd; |
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234 | } |
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235 | |
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236 | close (pfd); |
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237 | } |
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238 | } |
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239 | } |
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240 | #endif |
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241 | |
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242 | return -1; |
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243 | } |
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244 | |
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245 | static int |
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246 | get_pty (int *fd_tty, char **ttydev) |
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247 | { |
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248 | int pfd; |
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249 | |
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250 | if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1 |
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251 | || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1 |
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252 | || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1 |
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253 | || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1 |
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254 | || (pfd = get_pty_clone (fd_tty, ttydev)) != -1 |
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255 | || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1 |
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256 | || (pfd = get_pty_searched (fd_tty, ttydev)) != -1) |
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257 | return pfd; |
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258 | |
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259 | return -1; |
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260 | } |
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261 | |
208 | |
262 | /*----------------------------------------------------------------------*/ |
209 | /*----------------------------------------------------------------------*/ |
263 | /* |
210 | /* |
264 | * Returns tty file descriptor, or -1 on failure |
211 | * Returns tty file descriptor, or -1 on failure |
265 | */ |
212 | */ |
… | |
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276 | static int |
223 | static int |
277 | control_tty (int fd_tty) |
224 | control_tty (int fd_tty) |
278 | { |
225 | { |
279 | setsid (); |
226 | setsid (); |
280 | |
227 | |
281 | # if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
228 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
282 | /* |
229 | /* |
283 | * Push STREAMS modules: |
230 | * Push STREAMS modules: |
284 | * ptem: pseudo-terminal hardware emulation module. |
231 | * ptem: pseudo-terminal hardware emulation module. |
285 | * ldterm: standard terminal line discipline. |
232 | * ldterm: standard terminal line discipline. |
286 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
233 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
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294 | * documentation is really unclear about whether it is any close () on |
241 | * documentation is really unclear about whether it is any close () on |
295 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
242 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
296 | * close () - on the master side which causes a hang up to be sent |
243 | * close () - on the master side which causes a hang up to be sent |
297 | * through - Geoff Wing |
244 | * through - Geoff Wing |
298 | */ |
245 | */ |
299 | # ifdef HAVE_ISASTREAM |
246 | # ifdef HAVE_ISASTREAM |
300 | if (isastream (fd_tty) == 1) |
247 | if (isastream (fd_tty) == 1) |
301 | # endif |
248 | # endif |
302 | { |
249 | { |
303 | ioctl (fd_tty, I_PUSH, "ptem"); |
250 | ioctl (fd_tty, I_PUSH, "ptem"); |
304 | ioctl (fd_tty, I_PUSH, "ldterm"); |
251 | ioctl (fd_tty, I_PUSH, "ldterm"); |
305 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
252 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
306 | } |
253 | } |
307 | # endif |
254 | #endif |
308 | |
255 | |
309 | ioctl (fd_tty, TIOCSCTTY, NULL); |
256 | ioctl (fd_tty, TIOCSCTTY, NULL); |
310 | |
257 | |
311 | int fd = open ("/dev/tty", O_WRONLY); |
258 | int fd = open ("/dev/tty", O_WRONLY); |
312 | if (fd < 0) |
259 | if (fd < 0) |
313 | return -1; /* fatal */ |
260 | return -1; /* fatal */ |
314 | |
261 | |
315 | close (fd); |
262 | close (fd); |
316 | |
263 | |
317 | return 0; |
264 | return 0; |
318 | } |
265 | } |
319 | |
266 | |
320 | void |
267 | void |
321 | rxvt_ptytty::close_tty () |
268 | ptytty::close_tty () |
322 | { |
269 | { |
323 | if (tty < 0) |
270 | if (tty < 0) |
324 | return; |
271 | return; |
325 | |
272 | |
326 | close (tty); |
273 | close (tty); |
327 | tty = -1; |
274 | tty = -1; |
328 | } |
275 | } |
329 | |
276 | |
330 | bool |
277 | bool |
331 | rxvt_ptytty::make_controlling_tty () |
278 | ptytty::make_controlling_tty () |
332 | { |
279 | { |
333 | return control_tty (tty) >= 0; |
280 | return control_tty (tty) >= 0; |
334 | } |
281 | } |
335 | |
282 | |
336 | void |
283 | void |
337 | rxvt_ptytty::set_utf8_mode (bool on) |
284 | ptytty::set_utf8_mode (bool on) |
338 | { |
285 | { |
339 | #ifdef IUTF8 |
286 | #ifdef IUTF8 |
340 | if (pty < 0) |
287 | if (pty < 0) |
341 | return; |
288 | return; |
342 | |
289 | |
… | |
… | |
358 | } |
305 | } |
359 | } |
306 | } |
360 | #endif |
307 | #endif |
361 | } |
308 | } |
362 | |
309 | |
363 | ///////////////////////////////////////////////////////////////////////////// |
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364 | |
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365 | #ifndef NO_SETOWNER_TTYDEV |
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366 | static struct ttyconf { |
310 | static struct ttyconf { |
367 | gid_t gid; |
311 | gid_t gid; |
368 | mode_t mode; |
312 | mode_t mode; |
369 | |
313 | |
370 | ttyconf () |
314 | ttyconf () |
… | |
… | |
379 | } |
323 | } |
380 | else |
324 | else |
381 | #endif /* TTY_GID_SUPPORT */ |
325 | #endif /* TTY_GID_SUPPORT */ |
382 | { |
326 | { |
383 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
327 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
384 | gid = getgid (); |
328 | gid = 0; |
385 | } |
329 | } |
386 | } |
330 | } |
387 | } ttyconf; |
331 | } ttyconf; |
388 | |
332 | |
389 | ///////////////////////////////////////////////////////////////////////////// |
333 | ptytty_unix::ptytty_unix () |
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334 | { |
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335 | name = 0; |
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336 | #if UTMP_SUPPORT |
|
|
337 | cmd_pid = 0; |
|
|
338 | #endif |
|
|
339 | } |
|
|
340 | |
|
|
341 | ptytty_unix::~ptytty_unix () |
|
|
342 | { |
|
|
343 | #if UTMP_SUPPORT |
|
|
344 | logout (); |
|
|
345 | #endif |
|
|
346 | put (); |
|
|
347 | } |
390 | |
348 | |
391 | void |
349 | void |
392 | rxvt_ptytty_unix::privileges (rxvt_privaction action) |
350 | ptytty_unix::put () |
393 | { |
351 | { |
394 | if (!name || !*name) |
352 | if (name) |
395 | return; |
|
|
396 | |
|
|
397 | if (action == SAVE) |
|
|
398 | { |
|
|
399 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
400 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
|
|
401 | if (lstat (name, &savestat) < 0) /* you lose out */ |
|
|
402 | ; |
|
|
403 | else |
|
|
404 | # endif |
|
|
405 | { |
|
|
406 | saved = true; |
|
|
407 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
408 | chmod (name, ttyconf.mode); |
|
|
409 | # ifdef HAVE_REVOKE |
|
|
410 | revoke (name); |
|
|
411 | # endif |
|
|
412 | } |
|
|
413 | } |
353 | { |
414 | else |
354 | chmod (name, RESTORE_TTY_MODE); |
415 | { /* action == RESTORE */ |
|
|
416 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
417 | if (saved) |
|
|
418 | { |
|
|
419 | chmod (name, savestat.st_mode); |
|
|
420 | chown (name, savestat.st_uid, savestat.st_gid); |
|
|
421 | } |
|
|
422 | # else |
|
|
423 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
|
|
424 | chown (name, 0, 0); |
355 | chown (name, 0, ttyconf.gid); |
425 | # endif |
|
|
426 | } |
356 | } |
427 | } |
|
|
428 | #endif |
|
|
429 | |
357 | |
430 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
358 | close_tty (); |
431 | { |
359 | |
|
|
360 | if (pty >= 0) |
|
|
361 | close (pty); |
|
|
362 | |
|
|
363 | free (name); |
|
|
364 | |
432 | pty = tty = -1; |
365 | pty = tty = -1; |
433 | name = 0; |
366 | name = 0; |
434 | #ifndef NO_SETOWNER_TTYDEV |
|
|
435 | saved = false; |
|
|
436 | #endif |
|
|
437 | #if UTMP_SUPPORT |
|
|
438 | cmd_pid = 0; |
|
|
439 | #endif |
|
|
440 | } |
|
|
441 | |
|
|
442 | rxvt_ptytty_unix::~rxvt_ptytty_unix () |
|
|
443 | { |
|
|
444 | #if UTMP_SUPPORT |
|
|
445 | logout (); |
|
|
446 | #endif |
|
|
447 | put (); |
|
|
448 | } |
|
|
449 | |
|
|
450 | void |
|
|
451 | rxvt_ptytty_unix::put () |
|
|
452 | { |
|
|
453 | #ifndef NO_SETOWNER_TTYDEV |
|
|
454 | privileges (RESTORE); |
|
|
455 | #endif |
|
|
456 | |
|
|
457 | if (pty >= 0) close (pty); |
|
|
458 | close_tty (); |
|
|
459 | free (name); |
|
|
460 | |
|
|
461 | pty = tty = -1; |
|
|
462 | name = 0; |
|
|
463 | } |
367 | } |
464 | |
368 | |
465 | bool |
369 | bool |
466 | rxvt_ptytty_unix::get () |
370 | ptytty_unix::get () |
467 | { |
371 | { |
468 | /* get master (pty) */ |
372 | /* get master (pty) */ |
469 | if ((pty = get_pty (&tty, &name)) < 0) |
373 | if ((pty = get_pty (&tty, &name)) < 0) |
470 | return false; |
374 | return false; |
471 | |
375 | |
… | |
… | |
473 | |
377 | |
474 | /* get slave (tty) */ |
378 | /* get slave (tty) */ |
475 | if (tty < 0) |
379 | if (tty < 0) |
476 | { |
380 | { |
477 | #ifndef NO_SETOWNER_TTYDEV |
381 | #ifndef NO_SETOWNER_TTYDEV |
478 | privileges (SAVE); |
382 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
383 | chmod (name, ttyconf.mode); |
|
|
384 | # ifdef HAVE_REVOKE |
|
|
385 | revoke (name); |
|
|
386 | # endif |
479 | #endif |
387 | #endif |
480 | |
388 | |
481 | if ((tty = get_tty (name)) < 0) |
389 | if ((tty = get_tty (name)) < 0) |
482 | { |
390 | { |
483 | put (); |
391 | put (); |
… | |
… | |
486 | } |
394 | } |
487 | |
395 | |
488 | return true; |
396 | return true; |
489 | } |
397 | } |
490 | |
398 | |
491 | #if PTYTTY_HELPER |
|
|
492 | |
|
|
493 | static int sock_fd; |
|
|
494 | static int pid; |
|
|
495 | |
|
|
496 | struct command |
|
|
497 | { |
|
|
498 | enum { get, login, destroy } type; |
|
|
499 | |
|
|
500 | rxvt_ptytty *id; |
|
|
501 | |
|
|
502 | bool login_shell; |
|
|
503 | int cmd_pid; |
|
|
504 | char hostname[512]; // arbitrary, but should be plenty |
|
|
505 | }; |
|
|
506 | |
|
|
507 | struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty |
|
|
508 | { |
|
|
509 | rxvt_ptytty *id; |
|
|
510 | |
|
|
511 | ~rxvt_ptytty_proxy (); |
|
|
512 | |
|
|
513 | bool get (); |
|
|
514 | void login (int cmd_pid, bool login_shell, const char *hostname); |
|
|
515 | }; |
|
|
516 | |
|
|
517 | bool |
|
|
518 | rxvt_ptytty_proxy::get () |
|
|
519 | { |
|
|
520 | command cmd; |
|
|
521 | |
|
|
522 | cmd.type = command::get; |
|
|
523 | |
|
|
524 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
525 | |
|
|
526 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
|
|
527 | rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
|
|
528 | |
|
|
529 | if (!id) |
|
|
530 | return false; |
|
|
531 | |
|
|
532 | if ((pty = rxvt_recv_fd (sock_fd)) < 0 |
|
|
533 | || (tty = rxvt_recv_fd (sock_fd)) < 0) |
|
|
534 | rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
|
|
535 | |
|
|
536 | return true; |
|
|
537 | } |
|
|
538 | |
|
|
539 | void |
|
|
540 | rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
|
|
541 | { |
|
|
542 | command cmd; |
|
|
543 | |
|
|
544 | cmd.type = command::login; |
|
|
545 | cmd.id = id; |
|
|
546 | cmd.cmd_pid = cmd_pid; |
|
|
547 | cmd.login_shell = login_shell; |
|
|
548 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
|
|
549 | |
|
|
550 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
551 | } |
|
|
552 | |
|
|
553 | rxvt_ptytty_proxy::~rxvt_ptytty_proxy () |
|
|
554 | { |
|
|
555 | command cmd; |
|
|
556 | |
|
|
557 | cmd.type = command::destroy; |
|
|
558 | cmd.id = id; |
|
|
559 | |
|
|
560 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
561 | } |
|
|
562 | |
|
|
563 | static |
|
|
564 | void serve () |
|
|
565 | { |
|
|
566 | command cmd; |
|
|
567 | vector<rxvt_ptytty *> ptys; |
|
|
568 | |
|
|
569 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
|
|
570 | { |
|
|
571 | if (cmd.type == command::get) |
|
|
572 | { |
|
|
573 | // -> id ptyfd ttyfd |
|
|
574 | cmd.id = new rxvt_ptytty_unix; |
|
|
575 | |
|
|
576 | if (cmd.id->get ()) |
|
|
577 | { |
|
|
578 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
579 | ptys.push_back (cmd.id); |
|
|
580 | |
|
|
581 | rxvt_send_fd (sock_fd, cmd.id->pty); |
|
|
582 | rxvt_send_fd (sock_fd, cmd.id->tty); |
|
|
583 | } |
|
|
584 | else |
|
|
585 | { |
|
|
586 | delete cmd.id; |
|
|
587 | cmd.id = 0; |
|
|
588 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
589 | } |
|
|
590 | } |
|
|
591 | else if (cmd.type == command::login) |
|
|
592 | { |
|
|
593 | #if UTMP_SUPPORT |
|
|
594 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
|
|
595 | { |
|
|
596 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
|
|
597 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
|
|
598 | } |
|
|
599 | #endif |
|
|
600 | } |
|
|
601 | else if (cmd.type == command::destroy) |
|
|
602 | { |
|
|
603 | rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
|
|
604 | |
|
|
605 | if (pty) |
|
|
606 | { |
|
|
607 | delete *pty; |
|
|
608 | ptys.erase (pty); |
|
|
609 | } |
|
|
610 | } |
|
|
611 | else |
|
|
612 | break; |
|
|
613 | } |
|
|
614 | |
|
|
615 | // destroy all ptys |
|
|
616 | for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
|
|
617 | delete *i; |
|
|
618 | } |
|
|
619 | |
|
|
620 | void rxvt_ptytty_server () |
|
|
621 | { |
|
|
622 | int sv[2]; |
|
|
623 | |
|
|
624 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
|
|
625 | rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
|
|
626 | |
|
|
627 | pid = fork (); |
|
|
628 | |
|
|
629 | if (pid < 0) |
|
|
630 | rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
|
|
631 | |
|
|
632 | if (pid) |
|
|
633 | { |
|
|
634 | // client, urxvt |
|
|
635 | sock_fd = sv[0]; |
|
|
636 | close (sv[1]); |
|
|
637 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
|
|
638 | } |
|
|
639 | else |
|
|
640 | { |
|
|
641 | setgid (getegid ()); |
|
|
642 | setuid (geteuid ()); |
|
|
643 | |
|
|
644 | // server, pty-helper |
|
|
645 | sock_fd = sv[1]; |
|
|
646 | |
|
|
647 | for (int fd = 0; fd < 1023; fd++) |
|
|
648 | if (fd != sock_fd && fd != 1) |
|
|
649 | close (fd); |
|
|
650 | |
|
|
651 | serve (); |
|
|
652 | _exit (EXIT_SUCCESS); |
|
|
653 | } |
|
|
654 | } |
|
|
655 | #endif |
|
|
656 | |
|
|
657 | // a "factory" *g* |
|
|
658 | rxvt_ptytty * |
|
|
659 | rxvt_new_ptytty () |
|
|
660 | { |
|
|
661 | #if PTYTTY_HELPER |
|
|
662 | if (pid > 0) |
|
|
663 | // use helper process |
|
|
664 | return new rxvt_ptytty_proxy; |
|
|
665 | else |
|
|
666 | #endif |
|
|
667 | return new rxvt_ptytty_unix; |
|
|
668 | } |
|
|
669 | |
|
|
670 | /*----------------------- end-of-file (C source) -----------------------*/ |
|
|
671 | |
|
|