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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <string.h> | |
24 | #include <stdlib.h> | |
25 | ||
26 | #include <dbus/dbus.h> | |
27 | ||
28 | #include "util.h" | |
29 | #include "log.h" | |
30 | #include "dbus-common.h" | |
31 | ||
32 | static int spawn_getty(DBusConnection *bus, const char *console) { | |
33 | DBusMessage *m = NULL, *reply = NULL; | |
34 | DBusError error; | |
35 | const char *fail = "fail"; | |
36 | char *name; | |
37 | int r = -EIO; | |
38 | ||
39 | dbus_error_init(&error); | |
40 | ||
41 | assert(bus); | |
42 | assert(console); | |
43 | ||
44 | /* FIXME: we probably should escape the tty name properly here */ | |
93a45c56 | 45 | if (asprintf(&name, "serial-getty@%s.service", console) < 0) |
5192bd19 LP |
46 | return -ENOMEM; |
47 | ||
48 | if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"))) { | |
49 | log_error("Could not allocate message."); | |
50 | goto finish; | |
51 | } | |
52 | ||
53 | if (!dbus_message_append_args(m, | |
54 | DBUS_TYPE_STRING, &name, | |
55 | DBUS_TYPE_STRING, &fail, | |
56 | DBUS_TYPE_INVALID)) { | |
57 | log_error("Could not attach target and flag information to message."); | |
58 | goto finish; | |
59 | } | |
60 | ||
61 | if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) { | |
4cf5d675 | 62 | log_error("Failed to start unit: %s", bus_error_message(&error)); |
5192bd19 LP |
63 | goto finish; |
64 | } | |
65 | ||
66 | r = 0; | |
67 | ||
68 | finish: | |
69 | if (m) | |
70 | dbus_message_unref(m); | |
71 | ||
72 | if (reply) | |
73 | dbus_message_unref(reply); | |
74 | ||
75 | dbus_error_free(&error); | |
76 | ||
77 | free(name); | |
78 | ||
79 | return r; | |
80 | } | |
81 | ||
82 | static int parse_proc_cmdline_word(const char *word, char **console) { | |
83 | assert(word); | |
84 | ||
85 | if (startswith(word, "console=")) { | |
86 | const char *k; | |
87 | size_t l; | |
88 | char *w = NULL; | |
89 | ||
90 | k = word + 8; | |
91 | l = strcspn(k, ","); | |
92 | ||
93 | if (l < 4 || | |
94 | !startswith(k, "tty") || | |
95 | k[3+strspn(k+3, "0123456789")] != 0) { | |
96 | ||
97 | if (!(w = strndup(k, l))) | |
98 | return -ENOMEM; | |
99 | ||
100 | } | |
101 | ||
102 | free(*console); | |
103 | *console = w; | |
104 | } | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static int parse_proc_cmdline(char **console) { | |
110 | char *line; | |
111 | int r; | |
112 | char *w; | |
113 | size_t l; | |
114 | char *state; | |
115 | ||
116 | assert(console); | |
117 | ||
93a45c56 | 118 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { |
5192bd19 LP |
119 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); |
120 | return 0; | |
121 | } | |
122 | ||
123 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
124 | char *word; | |
125 | ||
126 | if (!(word = strndup(w, l))) { | |
127 | r = -ENOMEM; | |
128 | goto finish; | |
129 | } | |
130 | ||
131 | r = parse_proc_cmdline_word(word, console); | |
132 | free(word); | |
133 | ||
134 | if (r < 0) | |
135 | goto finish; | |
136 | } | |
137 | ||
138 | r = 0; | |
139 | ||
140 | finish: | |
141 | free(line); | |
142 | return r; | |
143 | } | |
144 | ||
145 | int main(int argc, char *argv[]) { | |
146 | DBusError error; | |
147 | int r = 1; | |
148 | char *console = NULL; | |
149 | DBusConnection *bus = NULL; | |
150 | ||
151 | dbus_error_init(&error); | |
152 | ||
153 | if (argc > 1) { | |
154 | log_error("This program does not take arguments."); | |
155 | return 1; | |
156 | } | |
157 | ||
158 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); | |
159 | log_parse_environment(); | |
160 | log_open(); | |
161 | ||
162 | if (bus_connect(DBUS_BUS_SYSTEM, &bus, NULL, &error) < 0) { | |
4cf5d675 | 163 | log_error("Failed to get D-Bus connection: %s", bus_error_message(&error)); |
5192bd19 LP |
164 | goto finish; |
165 | } | |
166 | ||
167 | if (parse_proc_cmdline(&console) < 0) | |
168 | goto finish; | |
169 | ||
170 | if (console) | |
171 | if (spawn_getty(bus, console) < 0) | |
172 | goto finish; | |
173 | ||
174 | r = 0; | |
175 | ||
176 | finish: | |
177 | free(console); | |
178 | ||
179 | if (bus) { | |
180 | dbus_connection_close(bus); | |
181 | dbus_connection_unref(bus); | |
182 | } | |
183 | ||
184 | dbus_error_free(&error); | |
185 | ||
186 | dbus_shutdown(); | |
187 | ||
188 | return r; | |
189 | } |