/*-*- 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; 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; }