1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
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
11 (at your option) any later version.
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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include "unit-name.h"
33 static const char *arg_dest = "/tmp";
35 static int add_symlink(const char *fservice, const char *tservice) {
36 _cleanup_free_ char *from = NULL, *to = NULL;
42 from = strappend(SYSTEM_DATA_UNIT_PATH "/", fservice);
46 to = strjoin(arg_dest,"/getty.target.wants/", tservice, NULL);
50 mkdir_parents_label(to, 0755);
52 r = symlink(from, to);
55 /* In case console=hvc0 is passed this will very likely result in EEXIST */
58 log_error("Failed to create symlink %s: %m", to);
66 static int add_serial_getty(const char *tty) {
67 _cleanup_free_ char *n = NULL;
71 log_debug("Automatically adding serial getty for /dev/%s.", tty);
73 n = unit_name_replace_instance("serial-getty@.service", tty);
77 return add_symlink("serial-getty@.service", n);
80 int main(int argc, char *argv[]) {
82 static const char virtualization_consoles[] =
87 _cleanup_free_ char *active = NULL;
90 if (argc > 1 && argc != 4) {
91 log_error("This program takes three or no arguments.");
98 log_set_target(LOG_TARGET_SAFE);
99 log_parse_environment();
104 if (detect_container(NULL) > 0) {
105 log_debug("Automatically adding console shell.");
107 if (add_symlink("console-getty.service", "console-getty.service") < 0)
110 /* Don't add any further magic if we are in a container */
114 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
118 /* Automatically add in a serial getty on all active
120 FOREACH_WORD(w, l, active, state) {
121 _cleanup_free_ char *tty = NULL;
129 if (isempty(tty) || tty_is_vc(tty))
132 /* We assume that gettys on virtual terminals are
133 * started via manual configuration and do this magic
134 * only for non-VC terminals. */
136 if (add_serial_getty(tty) < 0)
141 /* Automatically add in a serial getty on the first
142 * virtualizer console */
143 NULSTR_FOREACH(j, virtualization_consoles) {
144 _cleanup_free_ char *p = NULL;
146 p = strappend("/sys/class/tty/", j);
152 if (access(p, F_OK) < 0)
155 if (add_serial_getty(j) < 0)