137 lines
4 KiB
C
137 lines
4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "log.h"
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#include "util.h"
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#include "unit-name.h"
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const char *arg_dest = "/tmp";
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static int add_symlink(const char *fservice, const char *tservice) {
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char *from = NULL, *to = NULL;
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int r;
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asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", fservice);
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asprintf(&to, "%s/getty.target.wants/%s", arg_dest, tservice);
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if (!from || !to) {
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log_error("Out of memory");
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r = -ENOMEM;
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goto finish;
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}
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mkdir_parents(to, 0755);
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if ((r = symlink(from, to)) < 0) {
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log_error("Failed to create symlink from %s to %s: %m", from, to);
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r = -errno;
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}
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finish:
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free(from);
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free(to);
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return r;
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}
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int main(int argc, char *argv[]) {
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int r = EXIT_SUCCESS;
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char *active;
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if (argc > 2) {
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log_error("This program takes one or no arguments.");
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return EXIT_FAILURE;
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}
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if (argc > 1)
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arg_dest = argv[1];
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log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
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log_parse_environment();
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log_open();
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umask(0022);
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if (detect_container(NULL) > 0) {
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log_debug("Automatic adding console shell.");
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if (add_symlink("console-shell.service", "console-shell.service") < 0)
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r = EXIT_FAILURE;
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/* Don't add any further magic if we are in a container */
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goto finish;
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}
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if (read_one_line_file("/sys/class/tty/console/active", &active) >= 0) {
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const char *tty;
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if ((tty = strrchr(active, ' ')))
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tty ++;
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else
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tty = active;
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/* Automatically add in a serial getty on the kernel
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* console */
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if (!tty_is_vc(tty)) {
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char *n;
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/* We assume that gettys on virtual terminals are
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* started via manual configuration and do this magic
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* only for non-VC terminals. */
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log_debug("Automatically adding serial getty for /dev/%s.", tty);
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if (!(n = unit_name_replace_instance("serial-getty@.service", tty)) ||
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add_symlink("serial-getty@.service", n) < 0)
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r = EXIT_FAILURE;
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free(n);
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}
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free(active);
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}
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/* Automatically add in a serial getty on the first
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* virtualizer console */
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if (access("/sys/class/tty/hvc0", F_OK) == 0) {
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log_debug("Automatically adding serial getty for hvc0.");
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if (add_symlink("serial-getty@.service", "serial-getty@hvc0.service") < 0)
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r = EXIT_FAILURE;
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}
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if (access("/sys/class/tty/xvc0", F_OK) == 0) {
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log_debug("Automatically adding serial getty for xvc0.");
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if (add_symlink("serial-getty@.service", "serial-getty@xvc0.service") < 0)
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r = EXIT_FAILURE;
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}
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finish:
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return r;
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}
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