+/*-*- 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;
+}
~ianmdlvl / elogind.git / commitdiff