1 | #include "rxvtlib.h" |
1 | /*----------------------------------------------------------------------* |
2 | #include "rxvtdaemon.h" |
2 | * File: rxvtd.C |
3 | #include "iom.h" |
3 | *----------------------------------------------------------------------* |
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4 | * |
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5 | * All portions of code are copyright by their respective author/s. |
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6 | * Copyright (c) 2003-2007 Marc Lehmann <schmorp@schmorp.de> |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 3 of the License, or |
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11 | * (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 | *----------------------------------------------------------------------*/ |
4 | |
22 | |
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23 | #include "../config.h" |
5 | #include <cstdio> |
24 | #include <stdio.h> |
6 | #include <cstdlib> |
25 | #include <stdlib.h> |
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26 | #include <stdarg.h> |
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27 | #include <string.h> |
7 | |
28 | |
8 | #include <unistd.h> |
29 | #include <unistd.h> |
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30 | #include <fcntl.h> |
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31 | #include <sys/types.h> |
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32 | #include <sys/stat.h> |
9 | #include <sys/socket.h> |
33 | #include <sys/socket.h> |
10 | #include <sys/un.h> |
34 | #include <sys/un.h> |
11 | |
35 | |
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36 | #if defined(ENABLE_FRILLS) && defined(_POSIX_MEMLOCK) && _POSIX_MEMLOCK > 0 |
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37 | # define ENABLE_MLOCK 1 |
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38 | #endif |
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39 | |
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40 | #if ENABLE_MLOCK |
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41 | # include <sys/mman.h> |
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42 | #endif |
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43 | |
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44 | #include <errno.h> |
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45 | |
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46 | #include <libptytty.h> |
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47 | |
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48 | #include "rxvt.h" |
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49 | #include "rxvtdaemon.h" |
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50 | |
12 | struct server : rxvt_connection { |
51 | struct server : rxvt_connection |
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52 | { |
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53 | log_callback log_cb; |
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54 | getfd_callback getfd_cb; |
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55 | |
13 | void read_cb (io_watcher &w, short revents); io_watcher read_ev; |
56 | void read_cb (ev::io &w, int revents); ev::io read_ev; |
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57 | void log_msg (const char *msg); |
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58 | int getfd (int remote_fd); |
14 | |
59 | |
15 | server (int fd) |
60 | server (int fd) |
16 | : read_ev (this, &server::read_cb) |
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17 | { |
61 | { |
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62 | read_ev.set <server, &server::read_cb> (this); |
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63 | log_cb.set <server, &server::log_msg> (this); |
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64 | getfd_cb.set<server, &server::getfd> (this); |
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65 | |
18 | this->fd = fd; |
66 | this->fd = fd; |
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67 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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68 | fcntl (fd, F_SETFL, 0); |
19 | read_ev.start (fd, EVENT_READ); |
69 | read_ev.start (fd, ev::READ); |
20 | } |
70 | } |
21 | |
71 | |
22 | void err (); |
72 | void err (const char *format = 0, ...); |
23 | }; |
73 | }; |
24 | |
74 | |
25 | struct listener { |
75 | struct unix_listener |
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76 | { |
26 | int fd; |
77 | int fd; |
27 | |
78 | |
28 | void accept_cb (io_watcher &w, short revents); io_watcher accept_ev; |
79 | void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
29 | |
80 | |
30 | listener (); |
81 | unix_listener (int fd); |
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82 | static int open (const char *sockname); |
31 | }; |
83 | }; |
32 | |
84 | |
33 | listener::listener () |
85 | unix_listener::unix_listener (int fd) : fd (fd) |
34 | : accept_ev (this, &listener::accept_cb) |
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35 | { |
86 | { |
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87 | accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); |
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88 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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89 | fcntl (fd, F_SETFL, O_NONBLOCK); |
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90 | accept_ev.start (fd, ev::READ); |
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91 | } |
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92 | |
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93 | int unix_listener::open (const char *sockname) |
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94 | { |
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95 | sockaddr_un sa; |
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96 | |
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97 | if (strlen (sockname) >= sizeof(sa.sun_path)) |
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98 | { |
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99 | fputs ("socket name too long, aborting.\n", stderr); |
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100 | exit (EXIT_FAILURE); |
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101 | } |
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102 | |
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103 | int fd; |
36 | if ((fd = socket (PF_LOCAL, SOCK_STREAM, 0)) < 0) |
104 | if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
37 | { |
105 | { |
38 | perror ("unable to create listening socket"); |
106 | perror ("unable to create listening socket"); |
39 | exit (EXIT_FAILURE); |
107 | exit (EXIT_FAILURE); |
40 | } |
108 | } |
41 | |
109 | |
42 | sockaddr_un sa; |
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43 | |
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44 | sa.sun_family = AF_UNIX; |
110 | sa.sun_family = AF_UNIX; |
45 | strcpy (sa.sun_path, rxvt_connection::unix_sockname ()); |
111 | strcpy (sa.sun_path, sockname); |
46 | |
112 | |
47 | unlink (rxvt_connection::unix_sockname ()); |
113 | unlink (sockname); |
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114 | |
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115 | mode_t omask = umask (0077); |
48 | |
116 | |
49 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
117 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
50 | { |
118 | { |
51 | perror ("unable to bind listening socket"); |
119 | perror ("unable to bind listening socket"); |
52 | exit (EXIT_FAILURE); |
120 | exit (EXIT_FAILURE); |
53 | } |
121 | } |
54 | |
122 | |
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123 | umask (omask); |
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124 | |
55 | if (listen (fd, 5)) |
125 | if (listen (fd, 5)) |
56 | { |
126 | { |
57 | perror ("unable to listen on socket"); |
127 | perror ("unable to listen on socket"); |
58 | exit (EXIT_FAILURE); |
128 | exit (EXIT_FAILURE); |
59 | } |
129 | } |
60 | |
130 | |
61 | accept_ev.start (fd, EVENT_READ); |
131 | return fd; |
62 | } |
132 | } |
63 | |
133 | |
64 | void listener::accept_cb (io_watcher &w, short revents) |
134 | void unix_listener::accept_cb (ev::io &w, int revents) |
65 | { |
135 | { |
66 | int fd2 = accept (fd, 0, 0); |
136 | int fd2 = accept (fd, 0, 0); |
67 | |
137 | |
68 | if (fd2 >= 0) |
138 | if (fd2 >= 0) |
69 | new server (fd2); |
139 | new server (fd2); |
70 | } |
140 | } |
71 | |
141 | |
72 | void server::err () |
142 | int server::getfd (int remote_fd) |
73 | { |
143 | { |
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144 | send ("GETFD"); |
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145 | send (remote_fd); |
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146 | return ptytty::recv_fd (fd); |
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147 | } |
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148 | |
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149 | void server::log_msg (const char *msg) |
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150 | { |
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151 | send ("MSG"), send (msg); |
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152 | } |
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153 | |
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154 | void server::err (const char *format, ...) |
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155 | { |
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156 | if (format) |
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157 | { |
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158 | char err[1024]; |
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159 | |
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160 | va_list ap; |
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161 | va_start (ap, format); |
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162 | vsnprintf (err, 1024, format, ap); |
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163 | va_end (ap); |
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164 | |
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165 | log_msg (err); |
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166 | } |
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167 | |
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168 | send ("END"), send (0); |
74 | close (fd); |
169 | close (fd); |
75 | delete this; |
170 | delete this; |
76 | } |
171 | } |
77 | |
172 | |
78 | void server::read_cb (io_watcher &w, short revents) |
173 | void server::read_cb (ev::io &w, int revents) |
79 | { |
174 | { |
80 | auto_str tok; |
175 | auto_str tok; |
81 | |
176 | |
82 | if (recv (tok)) |
177 | if (recv (tok)) |
83 | { |
178 | { |
84 | if (!strcmp (tok, "NEW")) |
179 | if (!strcmp (tok, "NEW")) |
85 | { |
180 | { |
86 | auto_str display, cwd; |
181 | stringvec *argv = new stringvec; |
87 | simplevec<auto_str> argv; |
182 | stringvec *envv = new stringvec; |
88 | |
183 | |
89 | for (;;) |
184 | for (;;) |
90 | { |
185 | { |
91 | if (!recv (tok)) |
186 | if (!recv (tok)) |
92 | return err (); |
187 | return err (); |
93 | |
188 | |
94 | if (!strcmp (tok, "END")) |
189 | if (!strcmp (tok, "END")) |
95 | break; |
190 | break; |
96 | else if (!strcmp (tok, "DISPLAY") && recv (display)) |
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97 | ; |
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98 | else if (!strcmp (tok, "CWD") && recv (cwd)) |
191 | else if (!strcmp (tok, "ENV") && recv (tok)) |
99 | ; |
192 | envv->push_back (strdup (tok)); |
100 | else if (!strcmp (tok, "ARG") && recv (tok)) |
193 | else if (!strcmp (tok, "ARG") && recv (tok)) |
101 | argv.push_back (tok); |
194 | argv->push_back (strdup (tok)); |
102 | else |
195 | else |
103 | return err (); |
196 | return err ("protocol error: unexpected NEW token.\n"); |
104 | } |
197 | } |
105 | |
198 | |
106 | // TODO: no setenv, please |
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107 | setenv ("DISPLAY", display.get (), 1); |
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108 | |
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109 | rxvt_init (argv.size (), reinterpret_cast<char **>(argv.begin ())); |
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110 | dR; |
199 | { |
111 | rxvt_main_loop (aR); |
200 | rxvt_term *term = new rxvt_term; |
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201 | |
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202 | term->log_hook = &log_cb; |
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203 | term->getfd_hook = &getfd_cb; |
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204 | |
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205 | bool success = true; |
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206 | |
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207 | try |
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208 | { |
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209 | term->init (argv, envv); |
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210 | } |
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211 | catch (const std::exception &e) |
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212 | { |
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213 | log_msg (e.what()); |
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214 | success = false; |
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215 | } |
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216 | |
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217 | term->log_hook = 0; |
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218 | |
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219 | chdir ("/"); // init might change to different working directory |
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220 | |
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221 | if (!success) |
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222 | term->destroy (); |
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223 | |
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224 | send ("END"); send (success ? 1 : 0); |
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225 | } |
112 | } |
226 | } |
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227 | else if (!strcmp (tok, "QUIT")) |
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228 | _exit (0); |
113 | else |
229 | else |
114 | return err (); |
230 | return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
115 | } |
231 | } |
116 | else |
232 | else |
117 | return err (); |
233 | return err (); |
118 | } |
234 | } |
119 | |
235 | |
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236 | #ifdef ENABLE_FRILLS |
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237 | enum { |
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238 | SD_LISTEN_FDS_START = 3, |
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239 | }; |
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240 | |
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241 | // https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html |
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242 | // https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c |
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243 | static int get_listen_fds () |
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244 | { |
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245 | const char *listen_pid = getenv ("LISTEN_PID"); |
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246 | if (!listen_pid) |
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247 | return 0; |
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248 | |
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249 | char *end; |
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250 | errno = 0; |
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251 | long pid = strtol (listen_pid, &end, 10); |
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252 | if (errno || end == listen_pid || *end) |
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253 | return -1; |
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254 | |
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255 | if (getpid () != pid) |
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256 | return 0; |
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257 | |
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258 | const char *listen_fds = getenv ("LISTEN_FDS"); |
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259 | if (!listen_fds) |
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260 | return 0; |
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261 | |
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262 | errno = 0; |
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263 | long n = strtol (listen_fds, &end, 10); |
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264 | if (errno || end == listen_fds || *end) |
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265 | return -1; |
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266 | |
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267 | if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) |
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268 | return -1; |
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269 | |
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270 | unsetenv ("LISTEN_PID"); |
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271 | unsetenv ("LISTEN_FDS"); |
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272 | unsetenv ("LISTEN_FDNAMES"); |
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273 | |
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274 | return n; |
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275 | } |
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276 | #endif |
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277 | |
120 | int |
278 | int |
121 | main(int argc, const char *const *argv) |
279 | main (int argc, char *argv[]) |
122 | { |
280 | { |
123 | listener l; |
281 | try |
124 | iom.loop (); |
282 | { |
125 | |
283 | ptytty::init (); |
126 | #if 0 |
284 | } |
127 | if (rxvt_init(argc, argv) == NULL) |
285 | catch (const std::exception &e) |
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286 | { |
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287 | fputs (e.what (), stderr); |
128 | return EXIT_FAILURE; |
288 | return EXIT_FAILURE; |
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289 | } |
129 | |
290 | |
130 | dR; |
291 | static char opt_fork, opt_opendisplay, opt_quiet; |
131 | rxvt_main_loop(aR); /* main processing loop */ |
292 | #if ENABLE_PERL |
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293 | static char *opt_eval; |
132 | #endif |
294 | #endif |
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295 | #if ENABLE_MLOCK |
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296 | static char opt_lock; |
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297 | #endif |
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298 | |
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299 | for (int i = 1; i < argc; i++) |
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300 | { |
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301 | if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
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302 | opt_fork = 1; |
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303 | else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
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304 | opt_opendisplay = 1; |
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305 | else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
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306 | opt_quiet = 1; |
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307 | #if ENABLE_MLOCK |
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308 | else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) |
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309 | opt_lock = 1; |
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310 | #endif |
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311 | #if ENABLE_PERL |
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312 | else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval")) |
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313 | opt_eval = argv [++i]; |
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314 | #endif |
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315 | else |
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316 | { |
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317 | rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
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318 | return EXIT_FAILURE; |
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319 | } |
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320 | } |
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321 | |
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322 | rxvt_init (); |
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323 | |
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324 | #if ENABLE_PERL |
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325 | if (opt_eval) |
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326 | { |
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327 | rxvt_perl.init (); |
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328 | rxvt_perl.eval (opt_eval); |
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329 | } |
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330 | #endif |
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331 | |
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332 | // optionally open display and never release it. |
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333 | if (opt_opendisplay) |
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334 | if (const char *dpy = getenv ("DISPLAY")) |
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335 | displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? |
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336 | |
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337 | int fd; |
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338 | #ifdef ENABLE_FRILLS |
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339 | int n = get_listen_fds (); |
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340 | if (n > 1) |
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341 | { |
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342 | fputs ("received multiple file descriptors, aborting.\n", stderr); |
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343 | exit (EXIT_FAILURE); |
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344 | } |
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345 | else if (n == 1) |
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346 | { |
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347 | fd = SD_LISTEN_FDS_START; |
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348 | if (!opt_quiet) |
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349 | { |
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350 | printf ("rxvt-unicode daemon listening on fd.\n"); |
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351 | fflush (stdout); |
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352 | } |
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353 | } |
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354 | else |
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355 | #endif |
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356 | { |
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357 | char *sockname = rxvt_connection::unix_sockname (); |
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358 | fd = unix_listener::open (sockname); |
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359 | if (!opt_quiet) |
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360 | { |
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361 | printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
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362 | fflush (stdout); |
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363 | } |
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364 | free (sockname); |
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365 | } |
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366 | |
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367 | unix_listener l (fd); |
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368 | |
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369 | chdir ("/"); |
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370 | |
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371 | pid_t pid = 0; |
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372 | if (opt_fork) |
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373 | { |
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374 | pid = fork (); |
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375 | } |
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376 | |
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377 | #if ENABLE_MLOCK |
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378 | // Optionally perform an mlockall so this process does not get swapped out. |
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379 | if (opt_lock && !pid) |
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380 | if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0) |
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381 | perror ("unable to lock into ram"); |
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382 | #endif |
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383 | |
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384 | if (opt_fork) |
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385 | { |
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386 | if (pid < 0) |
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387 | { |
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388 | rxvt_log ("unable to fork daemon, aborting.\n"); |
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389 | return EXIT_FAILURE; |
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390 | } |
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391 | else if (pid > 0) |
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392 | _exit (EXIT_SUCCESS); |
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393 | |
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394 | ev_loop_fork (EV_DEFAULT_UC); |
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395 | } |
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396 | |
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397 | ev_run (); |
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398 | |
133 | return EXIT_SUCCESS; |
399 | return EXIT_SUCCESS; |
134 | } |
400 | } |
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401 | |