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"
30 const char *arg_dest = "/tmp";
32 static int add_symlink(const char *fservice, const char *tservice) {
33 char *from = NULL, *to = NULL;
39 asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice);
40 asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice);
43 log_error("Out of memory");
48 mkdir_parents(to, 0755);
50 r = symlink(from, to);
53 /* In case console=hvc0 is passed this will very likely result in EEXIST */
56 log_error("Failed to create symlink from %s to %s: %m", from, to);
69 static int add_serial_getty(const char *tty) {
75 log_debug("Automatically adding serial getty for /dev/%s.", tty);
77 n = unit_name_replace_instance("serial-getty@.service", tty);
79 log_error("Out of memory");
83 r = add_symlink("serial-getty@.service", n);
89 int main(int argc, char *argv[]) {
91 static const char virtualization_consoles[] =
101 log_error("This program takes one or no arguments.");
105 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
106 log_parse_environment();
114 if (detect_container(NULL) > 0) {
115 log_debug("Automatically adding console shell.");
117 if (add_symlink("console-shell.service", "console-shell.service") < 0)
120 /* Don't add any further magic if we are in a container */
124 if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
127 tty = strrchr(active, ' ');
133 /* Automatically add in a serial getty on the kernel
140 /* We assume that gettys on virtual terminals are
141 * started via manual configuration and do this magic
142 * only for non-VC terminals. */
144 k = add_serial_getty(tty);
154 /* Automatically add in a serial getty on the first
155 * virtualizer console */
156 NULSTR_FOREACH(j, virtualization_consoles) {
160 if (asprintf(&p, "/sys/class/tty/%s", j) < 0) {
161 log_error("Out of memory");
172 k = add_serial_getty(j);