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 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.
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.
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/>.
28 #include "unit-name.h"
31 const char *arg_dest = "/tmp";
33 static int add_symlink(const char *fservice, const char *tservice) {
34 char *from = NULL, *to = NULL;
40 asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice);
41 asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice);
44 log_error("Out of memory");
49 mkdir_parents(to, 0755);
51 r = symlink(from, to);
54 /* In case console=hvc0 is passed this will very likely result in EEXIST */
57 log_error("Failed to create symlink from %s to %s: %m", from, to);
70 static int add_serial_getty(const char *tty) {
76 log_debug("Automatically adding serial getty for /dev/%s.", tty);
78 n = unit_name_replace_instance("serial-getty@.service", tty);
80 log_error("Out of memory");
84 r = add_symlink("serial-getty@.service", n);
90 int main(int argc, char *argv[]) {
92 static const char virtualization_consoles[] =
102 log_error("This program takes one or no arguments.");
106 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
107 log_parse_environment();
115 if (detect_container(NULL) > 0) {
116 log_debug("Automatically adding console shell.");
118 if (add_symlink("console-shell.service", "console-shell.service") < 0)
121 /* Don't add any further magic if we are in a container */
125 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
128 tty = strrchr(active, ' ');
134 /* Automatically add in a serial getty on the kernel
141 /* We assume that gettys on virtual terminals are
142 * started via manual configuration and do this magic
143 * only for non-VC terminals. */
145 k = add_serial_getty(tty);
155 /* Automatically add in a serial getty on the first
156 * virtualizer console */
157 NULSTR_FOREACH(j, virtualization_consoles) {
161 if (asprintf(&p, "/sys/class/tty/%s", j) < 0) {
162 log_error("Out of memory");
173 k = add_serial_getty(j);