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2a796654 LP |
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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
2a796654 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
2a796654 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
2a796654 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <errno.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #include "log.h" | |
27 | #include "util.h" | |
49e942b2 | 28 | #include "mkdir.h" |
2a796654 | 29 | #include "unit-name.h" |
5dc4c17f | 30 | #include "virt.h" |
a5c32cff | 31 | #include "fileio.h" |
2a796654 | 32 | |
6a39419f | 33 | static const char *arg_dest = "/tmp"; |
2a796654 LP |
34 | |
35 | static int add_symlink(const char *fservice, const char *tservice) { | |
36 | char *from = NULL, *to = NULL; | |
37 | int r; | |
38 | ||
4dc380d1 LP |
39 | assert(fservice); |
40 | assert(tservice); | |
41 | ||
07719a21 | 42 | from = strappend(SYSTEM_DATA_UNIT_PATH "/", fservice); |
b7def684 | 43 | to = strjoin(arg_dest,"/getty.target.wants/", tservice, NULL); |
2a796654 LP |
44 | |
45 | if (!from || !to) { | |
0d0f0c50 | 46 | r = log_oom(); |
2a796654 LP |
47 | goto finish; |
48 | } | |
49 | ||
d2e54fae | 50 | mkdir_parents_label(to, 0755); |
2a796654 | 51 | |
a17b785b LP |
52 | r = symlink(from, to); |
53 | if (r < 0) { | |
54 | if (errno == EEXIST) | |
3c20189a | 55 | /* In case console=hvc0 is passed this will very likely result in EEXIST */ |
a17b785b LP |
56 | r = 0; |
57 | else { | |
c79bb9e4 | 58 | log_error("Failed to create symlink %s: %m", to); |
a17b785b LP |
59 | r = -errno; |
60 | } | |
2a796654 LP |
61 | } |
62 | ||
63 | finish: | |
64 | ||
65 | free(from); | |
66 | free(to); | |
67 | ||
68 | return r; | |
69 | } | |
70 | ||
4dc380d1 LP |
71 | static int add_serial_getty(const char *tty) { |
72 | char *n; | |
73 | int r; | |
74 | ||
75 | assert(tty); | |
76 | ||
77 | log_debug("Automatically adding serial getty for /dev/%s.", tty); | |
78 | ||
79 | n = unit_name_replace_instance("serial-getty@.service", tty); | |
0d0f0c50 SL |
80 | if (!n) |
81 | return log_oom(); | |
4dc380d1 LP |
82 | |
83 | r = add_symlink("serial-getty@.service", n); | |
84 | free(n); | |
85 | ||
86 | return r; | |
87 | } | |
88 | ||
2a796654 | 89 | int main(int argc, char *argv[]) { |
3c20189a LP |
90 | |
91 | static const char virtualization_consoles[] = | |
92 | "hvc0\0" | |
93 | "xvc0\0" | |
94 | "hvsi0\0"; | |
95 | ||
2a796654 LP |
96 | int r = EXIT_SUCCESS; |
97 | char *active; | |
3c20189a | 98 | const char *j; |
2a796654 | 99 | |
07719a21 LP |
100 | if (argc > 1 && argc != 4) { |
101 | log_error("This program takes three or no arguments."); | |
2a796654 LP |
102 | return EXIT_FAILURE; |
103 | } | |
104 | ||
07719a21 LP |
105 | if (argc > 1) |
106 | arg_dest = argv[1]; | |
107 | ||
a6903061 | 108 | log_set_target(LOG_TARGET_SAFE); |
2a796654 LP |
109 | log_parse_environment(); |
110 | log_open(); | |
111 | ||
4c12626c LP |
112 | umask(0022); |
113 | ||
2a796654 | 114 | if (detect_container(NULL) > 0) { |
6705c2df | 115 | log_debug("Automatically adding console shell."); |
2a796654 | 116 | |
337eebb9 | 117 | if (add_symlink("console-getty.service", "console-getty.service") < 0) |
2a796654 LP |
118 | r = EXIT_FAILURE; |
119 | ||
120 | /* Don't add any further magic if we are in a container */ | |
121 | goto finish; | |
122 | } | |
123 | ||
124 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
39f0570d MM |
125 | char *w, *state; |
126 | size_t l; | |
127 | ||
128 | /* Automatically add in a serial getty on all active | |
129 | * kernel consoles */ | |
130 | FOREACH_WORD(w, l, active, state) { | |
131 | char *tty; | |
3c20189a | 132 | int k; |
2a796654 | 133 | |
39f0570d MM |
134 | tty = strndup(w, l); |
135 | if (!tty) { | |
136 | log_oom(); | |
137 | free(active); | |
138 | r = EXIT_FAILURE; | |
139 | goto finish; | |
140 | } | |
141 | ||
142 | if (isempty(tty) || tty_is_vc(tty)) { | |
143 | free(tty); | |
144 | continue; | |
145 | } | |
146 | ||
2a796654 LP |
147 | /* We assume that gettys on virtual terminals are |
148 | * started via manual configuration and do this magic | |
149 | * only for non-VC terminals. */ | |
150 | ||
4dc380d1 | 151 | k = add_serial_getty(tty); |
3c20189a | 152 | |
3c20189a | 153 | if (k < 0) { |
39f0570d MM |
154 | free(tty); |
155 | free(active); | |
3c20189a LP |
156 | r = EXIT_FAILURE; |
157 | goto finish; | |
158 | } | |
159 | } | |
39f0570d | 160 | free(active); |
2a796654 LP |
161 | } |
162 | ||
163 | /* Automatically add in a serial getty on the first | |
164 | * virtualizer console */ | |
3c20189a | 165 | NULSTR_FOREACH(j, virtualization_consoles) { |
4dc380d1 | 166 | char *p; |
3c20189a | 167 | int k; |
2a796654 | 168 | |
3c20189a | 169 | if (asprintf(&p, "/sys/class/tty/%s", j) < 0) { |
0d0f0c50 | 170 | log_oom(); |
2a796654 | 171 | r = EXIT_FAILURE; |
3c20189a LP |
172 | goto finish; |
173 | } | |
980fc73d | 174 | |
3c20189a LP |
175 | k = access(p, F_OK); |
176 | free(p); | |
177 | ||
178 | if (k < 0) | |
179 | continue; | |
980fc73d | 180 | |
4dc380d1 | 181 | k = add_serial_getty(j); |
3c20189a LP |
182 | if (k < 0) { |
183 | r = EXIT_FAILURE; | |
184 | goto finish; | |
185 | } | |
2a796654 LP |
186 | } |
187 | ||
188 | finish: | |
189 | return r; | |
190 | } |