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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" |
2a796654 | 31 | |
6a39419f | 32 | static const char *arg_dest = "/tmp"; |
2a796654 LP |
33 | |
34 | static int add_symlink(const char *fservice, const char *tservice) { | |
35 | char *from = NULL, *to = NULL; | |
36 | int r; | |
37 | ||
4dc380d1 LP |
38 | assert(fservice); |
39 | assert(tservice); | |
40 | ||
2a796654 LP |
41 | asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice); |
42 | asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice); | |
43 | ||
44 | if (!from || !to) { | |
45 | log_error("Out of memory"); | |
46 | r = -ENOMEM; | |
47 | goto finish; | |
48 | } | |
49 | ||
50 | mkdir_parents(to, 0755); | |
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 { | |
58 | log_error("Failed to create symlink from %s to %s: %m", from, to); | |
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); | |
80 | if (!n) { | |
81 | log_error("Out of memory"); | |
82 | return -ENOMEM; | |
83 | } | |
84 | ||
85 | r = add_symlink("serial-getty@.service", n); | |
86 | free(n); | |
87 | ||
88 | return r; | |
89 | } | |
90 | ||
2a796654 | 91 | int main(int argc, char *argv[]) { |
3c20189a LP |
92 | |
93 | static const char virtualization_consoles[] = | |
94 | "hvc0\0" | |
95 | "xvc0\0" | |
96 | "hvsi0\0"; | |
97 | ||
2a796654 LP |
98 | int r = EXIT_SUCCESS; |
99 | char *active; | |
3c20189a | 100 | const char *j; |
2a796654 LP |
101 | |
102 | if (argc > 2) { | |
103 | log_error("This program takes one or no arguments."); | |
104 | return EXIT_FAILURE; | |
105 | } | |
106 | ||
4cfa2c99 | 107 | log_set_target(LOG_TARGET_AUTO); |
2a796654 LP |
108 | log_parse_environment(); |
109 | log_open(); | |
110 | ||
4c12626c LP |
111 | umask(0022); |
112 | ||
3c20189a LP |
113 | if (argc > 1) |
114 | arg_dest = argv[1]; | |
115 | ||
2a796654 | 116 | if (detect_container(NULL) > 0) { |
6705c2df | 117 | log_debug("Automatically adding console shell."); |
2a796654 LP |
118 | |
119 | if (add_symlink("console-shell.service", "console-shell.service") < 0) | |
120 | r = EXIT_FAILURE; | |
121 | ||
122 | /* Don't add any further magic if we are in a container */ | |
123 | goto finish; | |
124 | } | |
125 | ||
126 | if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) { | |
127 | const char *tty; | |
128 | ||
a17b785b LP |
129 | tty = strrchr(active, ' '); |
130 | if (tty) | |
2a796654 LP |
131 | tty ++; |
132 | else | |
133 | tty = active; | |
134 | ||
135 | /* Automatically add in a serial getty on the kernel | |
136 | * console */ | |
3c20189a LP |
137 | if (tty_is_vc(tty)) |
138 | free(active); | |
139 | else { | |
3c20189a | 140 | int k; |
2a796654 LP |
141 | |
142 | /* We assume that gettys on virtual terminals are | |
143 | * started via manual configuration and do this magic | |
144 | * only for non-VC terminals. */ | |
145 | ||
4dc380d1 | 146 | k = add_serial_getty(tty); |
3c20189a LP |
147 | free(active); |
148 | ||
3c20189a LP |
149 | if (k < 0) { |
150 | r = EXIT_FAILURE; | |
151 | goto finish; | |
152 | } | |
153 | } | |
2a796654 LP |
154 | } |
155 | ||
156 | /* Automatically add in a serial getty on the first | |
157 | * virtualizer console */ | |
3c20189a | 158 | NULSTR_FOREACH(j, virtualization_consoles) { |
4dc380d1 | 159 | char *p; |
3c20189a | 160 | int k; |
2a796654 | 161 | |
3c20189a LP |
162 | if (asprintf(&p, "/sys/class/tty/%s", j) < 0) { |
163 | log_error("Out of memory"); | |
2a796654 | 164 | r = EXIT_FAILURE; |
3c20189a LP |
165 | goto finish; |
166 | } | |
980fc73d | 167 | |
3c20189a LP |
168 | k = access(p, F_OK); |
169 | free(p); | |
170 | ||
171 | if (k < 0) | |
172 | continue; | |
980fc73d | 173 | |
4dc380d1 | 174 | k = add_serial_getty(j); |
3c20189a LP |
175 | if (k < 0) { |
176 | r = EXIT_FAILURE; | |
177 | goto finish; | |
178 | } | |
2a796654 LP |
179 | } |
180 | ||
181 | finish: | |
182 | return r; | |
183 | } |