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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "log.h"
#include "util.h"
#include "unit-name.h"
const char *arg_dest = "/tmp";
static int add_symlink(const char *fservice, const char *tservice) {
char *from = NULL, *to = NULL;
int r;
asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice);
asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice);
if (!from || !to) {
log_error("Out of memory");
r = -ENOMEM;
goto finish;
}
mkdir_parents(to, 0755);
if ((r = symlink(from, to)) < 0) {
log_error("Failed to create symlink from %s to %s: %m", from, to);
r = -errno;
}
finish:
free(from);
free(to);
return r;
}
int main(int argc, char *argv[]) {
int r = EXIT_SUCCESS;
char *active;
if (argc > 2) {
log_error("This program takes one or no arguments.");
return EXIT_FAILURE;
}
if (argc > 1)
arg_dest = argv[1];
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
if (detect_container(NULL) > 0) {
log_debug("Automatic adding console shell.");
if (add_symlink("console-shell.service", "console-shell.service") < 0)
r = EXIT_FAILURE;
/* Don't add any further magic if we are in a container */
goto finish;
}
if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
const char *tty;
truncate_nl(active);
if ((tty = strrchr(active, ' ')))
tty ++;
else
tty = active;
/* Automatically add in a serial getty on the kernel
* console */
if (!tty_is_vc(tty)) {
char *n;
/* We assume that gettys on virtual terminals are
* started via manual configuration and do this magic
* only for non-VC terminals. */
log_debug("Automatically adding serial getty for /dev/%s.", tty);
if (!(n = unit_name_replace_instance("serial-getty@.service", tty)) ||
add_symlink("serial-getty@.service", n) < 0)
r = EXIT_FAILURE;
free(n);
}
free(active);
}
/* Automatically add in a serial getty on the first
* virtualizer console */
if (access("/sys/class/tty/hvc0", F_OK) == 0) {
log_debug("Automatic adding serial getty for hvc0.");
if (add_symlink("serial-getty@.service", "serial-getty@hvc0.service") < 0)
r = EXIT_FAILURE;
}
finish:
return r;
}
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