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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> |
29 | |
34 | |
30 | #include <sys/types.h> |
35 | #include <sys/types.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 | static int |
70 | get_pty_streams (int *fd_tty, char **ttydev) |
74 | get_pty (int *fd_tty, char **ttydev) |
71 | { |
75 | { |
72 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
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73 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) |
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74 | int pfd; |
76 | int pfd; |
75 | |
77 | |
76 | # if defined(PTYS_ARE_GETPT) |
78 | # if defined(HAVE_GETPT) |
77 | pfd = getpt(); |
79 | pfd = getpt(); |
78 | # elif defined(PTYS_ARE_POSIX) |
80 | # elif defined(HAVE_POSIX_OPENPT) |
79 | pfd = posix_openpt (O_RDWR); |
81 | pfd = posix_openpt (O_RDWR); |
80 | # else |
82 | # else |
81 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
83 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
82 | # endif |
84 | # endif |
83 | if (pfd >= 0) |
85 | if (pfd >= 0) |
84 | { |
86 | { |
85 | if (grantpt (pfd) == 0 /* change slave permissions */ |
87 | if (grantpt (pfd) == 0 /* change slave permissions */ |
86 | && unlockpt (pfd) == 0) |
88 | && unlockpt (pfd) == 0) |
… | |
… | |
89 | return pfd; |
91 | return pfd; |
90 | } |
92 | } |
91 | |
93 | |
92 | close (pfd); |
94 | close (pfd); |
93 | } |
95 | } |
94 | # endif |
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95 | #endif |
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96 | |
96 | |
97 | return -1; |
97 | return -1; |
98 | } |
98 | } |
99 | |
99 | #elif defined(HAVE_OPENPTY) |
100 | static inline int |
100 | static int |
101 | get_pty_openpty (int *fd_tty, char **ttydev) |
101 | get_pty (int *fd_tty, char **ttydev) |
102 | { |
102 | { |
103 | #ifdef PTYS_ARE_OPENPTY |
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104 | int pfd; |
103 | int pfd; |
105 | int res; |
104 | int res; |
106 | char tty_name[32]; |
105 | char tty_name[32]; |
107 | |
106 | |
108 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
107 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
109 | if (res != -1) |
108 | if (res != -1) |
110 | { |
109 | { |
111 | *ttydev = strdup (tty_name); |
110 | *ttydev = strdup (tty_name); |
112 | return pfd; |
111 | return pfd; |
113 | } |
112 | } |
114 | #endif |
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115 | |
113 | |
116 | return -1; |
114 | return -1; |
117 | } |
115 | } |
118 | |
116 | #elif defined(HAVE__GETPTY) |
119 | static inline int |
117 | static int |
120 | get_pty__getpty (int *fd_tty, char **ttydev) |
118 | get_pty (int *fd_tty, char **ttydev) |
121 | { |
119 | { |
122 | #ifdef PTYS_ARE__GETPTY |
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123 | int pfd; |
120 | int pfd; |
124 | |
121 | |
125 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
122 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
126 | if (*ttydev != NULL) |
123 | if (*ttydev != NULL) |
127 | return pfd; |
124 | return pfd; |
128 | #endif |
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129 | |
125 | |
130 | return -1; |
126 | return -1; |
131 | } |
127 | } |
132 | |
128 | #elif defined(HAVE_DEV_PTC) |
133 | static inline int |
129 | static int |
134 | get_pty_ptc (int *fd_tty, char **ttydev) |
130 | get_pty (int *fd_tty, char **ttydev) |
135 | { |
131 | { |
136 | #ifdef PTYS_ARE_PTC |
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137 | int pfd; |
132 | int pfd; |
138 | |
133 | |
139 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
134 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
140 | { |
135 | { |
141 | *ttydev = strdup (ttyname (pfd)); |
136 | *ttydev = strdup (ttyname (pfd)); |
142 | return pfd; |
137 | return pfd; |
143 | } |
138 | } |
144 | #endif |
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145 | |
139 | |
146 | return -1; |
140 | return -1; |
147 | } |
141 | } |
148 | |
142 | #elif defined(HAVE_DEV_CLONE) |
149 | static inline int |
143 | static int |
150 | get_pty_clone (int *fd_tty, char **ttydev) |
144 | get_pty (int *fd_tty, char **ttydev) |
151 | { |
145 | { |
152 | #ifdef PTYS_ARE_CLONE |
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153 | int pfd; |
146 | int pfd; |
154 | |
147 | |
155 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
148 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
156 | { |
149 | { |
157 | *ttydev = strdup (ptsname (pfd)); |
150 | *ttydev = strdup (ptsname (pfd)); |
158 | return pfd; |
151 | return pfd; |
159 | } |
152 | } |
160 | #endif |
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161 | |
153 | |
162 | return -1; |
154 | return -1; |
163 | } |
155 | } |
164 | |
156 | #else |
165 | static inline int |
157 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
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158 | static int |
166 | get_pty_numeric (int *fd_tty, char **ttydev) |
159 | get_pty (int *fd_tty, char **ttydev) |
167 | { |
160 | { |
168 | #ifdef PTYS_ARE_NUMERIC |
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169 | int pfd; |
161 | int pfd; |
170 | int idx; |
162 | int i; |
171 | char *c1, *c2; |
163 | char pty_name[32]; |
172 | char pty_name[] = "/dev/ptyp???"; |
164 | char tty_name[32]; |
173 | char tty_name[] = "/dev/ttyp???"; |
165 | const char *majors = "pqrstuvwxyzabcde"; |
174 | |
166 | const char *minors = "0123456789abcdef"; |
175 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
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176 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
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177 | |
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178 | for (idx = 0; idx < 256; idx++) |
167 | for (i = 0; i < 256; i++) |
179 | { |
168 | { |
180 | sprintf (c1, "%d", idx); |
169 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
181 | sprintf (c2, "%d", idx); |
170 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
182 | |
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183 | if (access (tty_name, F_OK) < 0) |
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184 | { |
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185 | idx = 256; |
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186 | break; |
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187 | } |
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188 | |
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189 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
171 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
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172 | { |
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173 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
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174 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
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175 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
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176 | continue; |
190 | { |
177 | } |
191 | if (access (tty_name, R_OK | W_OK) == 0) |
178 | if (access (tty_name, R_OK | W_OK) == 0) |
192 | { |
179 | { |
193 | *ttydev = strdup (tty_name); |
180 | *ttydev = strdup (tty_name); |
194 | return pfd; |
181 | return pfd; |
195 | } |
182 | } |
196 | |
183 | |
197 | close (pfd); |
184 | close (pfd); |
198 | } |
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199 | } |
185 | } |
200 | #endif |
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201 | |
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202 | return -1; |
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203 | } |
186 | } |
204 | |
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205 | static inline int |
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206 | get_pty_searched (int *fd_tty, char **ttydev) |
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207 | { |
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208 | #ifdef PTYS_ARE_SEARCHED |
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209 | # ifndef PTYCHAR1 |
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210 | # define PTYCHAR1 "pqrstuvwxyz" |
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211 | # endif |
187 | #endif |
212 | # ifndef PTYCHAR2 |
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213 | # define PTYCHAR2 "0123456789abcdef" |
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214 | # endif |
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215 | int pfd; |
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216 | const char *c1, *c2; |
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217 | char pty_name[] = "/dev/pty??"; |
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218 | char tty_name[] = "/dev/tty??"; |
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219 | |
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220 | for (c1 = PTYCHAR1; *c1; c1++) |
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221 | { |
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222 | pty_name[ (sizeof (pty_name) - 3)] = |
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223 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
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224 | |
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225 | for (c2 = PTYCHAR2; *c2; c2++) |
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226 | { |
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227 | pty_name[ (sizeof (pty_name) - 2)] = |
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228 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
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229 | |
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230 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
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231 | { |
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232 | if (access (tty_name, R_OK | W_OK) == 0) |
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233 | { |
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234 | *ttydev = strdup (tty_name); |
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235 | return pfd; |
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236 | } |
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237 | |
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238 | close (pfd); |
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239 | } |
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240 | } |
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241 | } |
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242 | #endif |
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243 | |
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244 | return -1; |
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245 | } |
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246 | |
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247 | static int |
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248 | get_pty (int *fd_tty, char **ttydev) |
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249 | { |
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250 | int pfd; |
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251 | |
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252 | if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1 |
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253 | || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1 |
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254 | || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1 |
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255 | || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1 |
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256 | || (pfd = get_pty_clone (fd_tty, ttydev)) != -1 |
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257 | || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1 |
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258 | || (pfd = get_pty_searched (fd_tty, ttydev)) != -1) |
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259 | return pfd; |
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260 | |
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261 | return -1; |
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262 | } |
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263 | |
188 | |
264 | /*----------------------------------------------------------------------*/ |
189 | /*----------------------------------------------------------------------*/ |
265 | /* |
190 | /* |
266 | * Returns tty file descriptor, or -1 on failure |
191 | * Returns tty file descriptor, or -1 on failure |
267 | */ |
192 | */ |
… | |
… | |
278 | static int |
203 | static int |
279 | control_tty (int fd_tty) |
204 | control_tty (int fd_tty) |
280 | { |
205 | { |
281 | setsid (); |
206 | setsid (); |
282 | |
207 | |
283 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
208 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
284 | /* |
209 | /* |
285 | * Push STREAMS modules: |
210 | * Push STREAMS modules: |
286 | * ptem: pseudo-terminal hardware emulation module. |
211 | * ptem: pseudo-terminal hardware emulation module. |
287 | * ldterm: standard terminal line discipline. |
212 | * ldterm: standard terminal line discipline. |
288 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
213 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
… | |
… | |
310 | |
235 | |
311 | ioctl (fd_tty, TIOCSCTTY, NULL); |
236 | ioctl (fd_tty, TIOCSCTTY, NULL); |
312 | |
237 | |
313 | int fd = open ("/dev/tty", O_WRONLY); |
238 | int fd = open ("/dev/tty", O_WRONLY); |
314 | if (fd < 0) |
239 | if (fd < 0) |
315 | return -1; /* fatal */ |
240 | return -1; /* fatal */ |
316 | |
241 | |
317 | close (fd); |
242 | close (fd); |
318 | |
243 | |
319 | return 0; |
244 | return 0; |
320 | } |
245 | } |
321 | |
246 | |
322 | void |
247 | void |
323 | rxvt_ptytty::close_tty () |
248 | ptytty::close_tty () |
324 | { |
249 | { |
325 | if (tty < 0) |
250 | if (tty < 0) |
326 | return; |
251 | return; |
327 | |
252 | |
328 | close (tty); |
253 | close (tty); |
329 | tty = -1; |
254 | tty = -1; |
330 | } |
255 | } |
331 | |
256 | |
332 | bool |
257 | bool |
333 | rxvt_ptytty::make_controlling_tty () |
258 | ptytty::make_controlling_tty () |
334 | { |
259 | { |
335 | return control_tty (tty) >= 0; |
260 | return control_tty (tty) >= 0; |
336 | } |
261 | } |
337 | |
262 | |
338 | void |
263 | void |
339 | rxvt_ptytty::set_utf8_mode (bool on) |
264 | ptytty::set_utf8_mode (bool on) |
340 | { |
265 | { |
341 | #ifdef IUTF8 |
266 | #ifdef IUTF8 |
342 | if (pty < 0) |
267 | if (pty < 0) |
343 | return; |
268 | return; |
344 | |
269 | |
… | |
… | |
383 | gid = 0; |
308 | gid = 0; |
384 | } |
309 | } |
385 | } |
310 | } |
386 | } ttyconf; |
311 | } ttyconf; |
387 | |
312 | |
388 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
313 | ptytty_unix::ptytty_unix () |
389 | { |
314 | { |
390 | pty = tty = -1; |
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391 | name = 0; |
315 | name = 0; |
392 | #if UTMP_SUPPORT |
316 | #if UTMP_SUPPORT |
393 | cmd_pid = 0; |
317 | cmd_pid = 0; |
394 | #endif |
318 | #endif |
395 | } |
319 | } |
396 | |
320 | |
397 | rxvt_ptytty_unix::~rxvt_ptytty_unix () |
321 | ptytty_unix::~ptytty_unix () |
398 | { |
322 | { |
399 | #if UTMP_SUPPORT |
323 | #if UTMP_SUPPORT |
400 | logout (); |
324 | logout (); |
401 | #endif |
325 | #endif |
402 | put (); |
326 | put (); |
403 | } |
327 | } |
404 | |
328 | |
405 | void |
329 | void |
406 | rxvt_ptytty_unix::put () |
330 | ptytty_unix::put () |
407 | { |
331 | { |
408 | chmod (name, RESTORE_TTY_MODE); |
332 | chmod (name, RESTORE_TTY_MODE); |
409 | chown (name, 0, ttyconf.gid); |
333 | chown (name, 0, ttyconf.gid); |
410 | |
334 | |
411 | close_tty (); |
335 | close_tty (); |
… | |
… | |
418 | pty = tty = -1; |
342 | pty = tty = -1; |
419 | name = 0; |
343 | name = 0; |
420 | } |
344 | } |
421 | |
345 | |
422 | bool |
346 | bool |
423 | rxvt_ptytty_unix::get () |
347 | ptytty_unix::get () |
424 | { |
348 | { |
425 | /* get master (pty) */ |
349 | /* get master (pty) */ |
426 | if ((pty = get_pty (&tty, &name)) < 0) |
350 | if ((pty = get_pty (&tty, &name)) < 0) |
427 | return false; |
351 | return false; |
428 | |
352 | |
… | |
… | |
449 | return true; |
373 | return true; |
450 | } |
374 | } |
451 | |
375 | |
452 | #if PTYTTY_HELPER |
376 | #if PTYTTY_HELPER |
453 | |
377 | |
454 | static int sock_fd; |
378 | static int sock_fd = -1; |
455 | static int pid; |
379 | static int helper_pid, owner_pid; |
456 | |
380 | |
457 | struct command |
381 | struct command |
458 | { |
382 | { |
459 | enum { get, login, destroy } type; |
383 | enum { get, login, destroy } type; |
460 | |
384 | |
461 | rxvt_ptytty *id; |
385 | ptytty *id; |
462 | |
386 | |
463 | bool login_shell; |
387 | bool login_shell; |
464 | int cmd_pid; |
388 | int cmd_pid; |
465 | char hostname[512]; // arbitrary, but should be plenty |
389 | char hostname[512]; // arbitrary, but should be plenty |
466 | }; |
390 | }; |
467 | |
391 | |
468 | struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty |
392 | struct ptytty_proxy : ptytty |
469 | { |
393 | { |
470 | rxvt_ptytty *id; |
394 | ptytty *id; |
471 | |
395 | |
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396 | ptytty_proxy () |
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397 | : id(0) |
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398 | { |
|
|
399 | } |
|
|
400 | |
472 | ~rxvt_ptytty_proxy (); |
401 | ~ptytty_proxy (); |
473 | |
402 | |
474 | bool get (); |
403 | bool get (); |
475 | void login (int cmd_pid, bool login_shell, const char *hostname); |
404 | void login (int cmd_pid, bool login_shell, const char *hostname); |
476 | }; |
405 | }; |
477 | |
406 | |
478 | bool |
407 | bool |
479 | rxvt_ptytty_proxy::get () |
408 | ptytty_proxy::get () |
480 | { |
409 | { |
481 | command cmd; |
410 | command cmd; |
482 | |
411 | |
483 | cmd.type = command::get; |
412 | cmd.type = command::get; |
484 | |
413 | |
485 | write (sock_fd, &cmd, sizeof (cmd)); |
414 | write (sock_fd, &cmd, sizeof (cmd)); |
486 | |
415 | |
487 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
416 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
488 | rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
417 | ptytty_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
489 | |
418 | |
490 | if (!id) |
419 | if (!id) |
491 | return false; |
420 | return false; |
492 | |
421 | |
493 | if ((pty = rxvt_recv_fd (sock_fd)) < 0 |
422 | if ((pty = recv_fd (sock_fd)) < 0 |
494 | || (tty = rxvt_recv_fd (sock_fd)) < 0) |
423 | || (tty = recv_fd (sock_fd)) < 0) |
495 | rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
424 | ptytty_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
496 | |
425 | |
497 | return true; |
426 | return true; |
498 | } |
427 | } |
499 | |
428 | |
500 | void |
429 | void |
501 | rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
430 | ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
502 | { |
431 | { |
503 | command cmd; |
432 | command cmd; |
504 | |
433 | |
505 | cmd.type = command::login; |
434 | cmd.type = command::login; |
506 | cmd.id = id; |
435 | cmd.id = id; |
… | |
… | |
509 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
438 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
510 | |
439 | |
511 | write (sock_fd, &cmd, sizeof (cmd)); |
440 | write (sock_fd, &cmd, sizeof (cmd)); |
512 | } |
441 | } |
513 | |
442 | |
514 | rxvt_ptytty_proxy::~rxvt_ptytty_proxy () |
443 | ptytty_proxy::~ptytty_proxy () |
515 | { |
444 | { |
|
|
445 | if (id) |
|
|
446 | { |
516 | command cmd; |
447 | command cmd; |
517 | |
448 | |
518 | cmd.type = command::destroy; |
449 | cmd.type = command::destroy; |
519 | cmd.id = id; |
450 | cmd.id = id; |
520 | |
451 | |
521 | write (sock_fd, &cmd, sizeof (cmd)); |
452 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
453 | } |
522 | } |
454 | } |
523 | |
455 | |
524 | static |
456 | static |
525 | void serve () |
457 | void serve () |
526 | { |
458 | { |
527 | command cmd; |
459 | command cmd; |
528 | vector<rxvt_ptytty *> ptys; |
460 | vector<ptytty *> ptys; |
529 | |
461 | |
530 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
462 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
531 | { |
463 | { |
532 | if (cmd.type == command::get) |
464 | if (cmd.type == command::get) |
533 | { |
465 | { |
534 | // -> id ptyfd ttyfd |
466 | // -> id ptyfd ttyfd |
535 | cmd.id = new rxvt_ptytty_unix; |
467 | cmd.id = new ptytty_unix; |
536 | |
468 | |
537 | if (cmd.id->get ()) |
469 | if (cmd.id->get ()) |
538 | { |
470 | { |
539 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
471 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
540 | ptys.push_back (cmd.id); |
472 | ptys.push_back (cmd.id); |
541 | |
473 | |
542 | rxvt_send_fd (sock_fd, cmd.id->pty); |
474 | ptytty::send_fd (sock_fd, cmd.id->pty); |
543 | rxvt_send_fd (sock_fd, cmd.id->tty); |
475 | ptytty::send_fd (sock_fd, cmd.id->tty); |
544 | } |
476 | } |
545 | else |
477 | else |
546 | { |
478 | { |
547 | delete cmd.id; |
479 | delete cmd.id; |
548 | cmd.id = 0; |
480 | cmd.id = 0; |
… | |
… | |
559 | } |
491 | } |
560 | #endif |
492 | #endif |
561 | } |
493 | } |
562 | else if (cmd.type == command::destroy) |
494 | else if (cmd.type == command::destroy) |
563 | { |
495 | { |
564 | rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
496 | vector<ptytty *>::iterator pty = find (ptys.begin (), ptys.end (), cmd.id); |
565 | |
497 | |
566 | if (pty) |
498 | if (pty != ptys.end ()) |
567 | { |
499 | { |
568 | delete *pty; |
500 | delete *pty; |
569 | ptys.erase (pty); |
501 | ptys.erase (pty); |
570 | } |
502 | } |
571 | } |
503 | } |
572 | else |
504 | else |
573 | break; |
505 | break; |
574 | } |
506 | } |
575 | |
507 | |
576 | // destroy all ptys |
508 | // destroy all ptys |
577 | for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
509 | for (vector<ptytty *>::iterator i = ptys.end (); i-- > ptys.begin (); ) |
578 | delete *i; |
510 | delete *i; |
579 | } |
511 | } |
580 | |
512 | |
581 | void rxvt_ptytty_server () |
513 | void |
|
|
514 | ptytty::use_helper () |
582 | { |
515 | { |
|
|
516 | int pid = getpid (); |
|
|
517 | |
|
|
518 | if (sock_fd >= 0 && pid == owner_pid) |
|
|
519 | return; |
|
|
520 | |
|
|
521 | owner_pid = pid; |
|
|
522 | |
583 | int sv[2]; |
523 | int sv[2]; |
584 | |
524 | |
585 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
525 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
586 | rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
526 | ptytty_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
587 | |
527 | |
588 | pid = fork (); |
528 | helper_pid = fork (); |
589 | |
529 | |
590 | if (pid < 0) |
530 | if (helper_pid < 0) |
591 | rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
531 | ptytty_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
592 | |
532 | |
593 | if (pid) |
533 | if (helper_pid) |
594 | { |
534 | { |
595 | // client, urxvt |
535 | // client, process |
596 | sock_fd = sv[0]; |
536 | sock_fd = sv[0]; |
597 | close (sv[1]); |
537 | close (sv[1]); |
598 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
538 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
599 | } |
539 | } |
600 | else |
540 | else |
601 | { |
541 | { |
602 | // server, pty-helper |
542 | // server, pty-helper |
603 | sock_fd = sv[1]; |
543 | sock_fd = sv[1]; |
604 | |
544 | |
|
|
545 | chdir ("/"); |
|
|
546 | |
605 | for (int fd = 0; fd < 1023; fd++) |
547 | for (int fd = 0; fd < 1023; fd++) |
606 | if (fd != sock_fd) |
548 | if (fd != sock_fd) |
607 | close (fd); |
549 | close (fd); |
608 | |
550 | |
609 | serve (); |
551 | serve (); |
… | |
… | |
611 | } |
553 | } |
612 | } |
554 | } |
613 | |
555 | |
614 | #endif |
556 | #endif |
615 | |
557 | |
616 | // a "factory" *g* |
|
|
617 | rxvt_ptytty * |
558 | ptytty * |
618 | rxvt_new_ptytty () |
559 | ptytty::create () |
619 | { |
560 | { |
620 | #if PTYTTY_HELPER |
561 | #if PTYTTY_HELPER |
621 | if (pid > 0) |
562 | if (helper_pid && getpid () == owner_pid) |
622 | // use helper process |
563 | // use helper process |
623 | return new rxvt_ptytty_proxy; |
564 | return new ptytty_proxy; |
624 | else |
565 | else |
625 | #endif |
566 | #endif |
626 | return new rxvt_ptytty_unix; |
567 | return new ptytty_unix; |
627 | } |
568 | } |
628 | |
569 | |
629 | /*----------------------- end-of-file (C source) -----------------------*/ |
570 | void |
|
|
571 | ptytty::init () |
|
|
572 | { |
|
|
573 | uid_t uid = getuid (); |
|
|
574 | gid_t gid = getgid (); |
|
|
575 | |
|
|
576 | // before doing anything else, check for setuid/setgid operation, |
|
|
577 | // start the helper process and drop privileges |
|
|
578 | if (uid != geteuid () |
|
|
579 | || gid != getegid ()) |
|
|
580 | { |
|
|
581 | #if PTYTTY_HELPER |
|
|
582 | use_helper (); |
|
|
583 | #else |
|
|
584 | ptytty_warn ("running setuid/setgid without pty helper compiled in, continuing unprivileged.\n"); |
|
|
585 | #endif |
630 | |
586 | |
|
|
587 | drop_privileges (); |
|
|
588 | } |
|
|
589 | } |
|
|
590 | |
|
|
591 | void |
|
|
592 | ptytty::drop_privileges () |
|
|
593 | { |
|
|
594 | uid_t uid = getuid (); |
|
|
595 | gid_t gid = getgid (); |
|
|
596 | |
|
|
597 | // drop privileges |
|
|
598 | #if HAVE_SETRESUID |
|
|
599 | setresgid (gid, gid, gid); |
|
|
600 | setresuid (uid, uid, uid); |
|
|
601 | #elif HAVE_SETREUID |
|
|
602 | setregid (gid, gid); |
|
|
603 | setreuid (uid, uid); |
|
|
604 | #elif HAVE_SETUID |
|
|
605 | setgid (gid); |
|
|
606 | setuid (uid); |
|
|
607 | #endif |
|
|
608 | |
|
|
609 | if (uid != geteuid () |
|
|
610 | || gid != getegid ()) |
|
|
611 | ptytty_fatal ("unable to drop privileges, aborting.\n"); |
|
|
612 | } |
|
|
613 | |