/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 Ivan Shapovalov systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdio.h> #include <errno.h> #include "log.h" #include "util.h" #include "special.h" #include "mkdir.h" #include "unit-name.h" static const char *arg_dest = "/tmp"; static char *arg_resume_dev = NULL; static int parse_proc_cmdline_item(const char *key, const char *value) { if (streq(key, "resume") && value) { free(arg_resume_dev); arg_resume_dev = fstab_node_to_udev_node(value); if (!arg_resume_dev) return log_oom(); } return 0; } static int process_resume(void) { _cleanup_free_ char *name = NULL, *lnk = NULL; if (!arg_resume_dev) return 0; name = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_dev, ".service"); if (!name) return log_oom(); lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", name, NULL); if (!lnk) return log_oom(); mkdir_parents_label(lnk, 0755); if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-hibernate-resume@.service", lnk) < 0) return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); return 0; } int main(int argc, char *argv[]) { int r = 0; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); return EXIT_FAILURE; } if (argc > 1) arg_dest = argv[1]; log_set_target(LOG_TARGET_SAFE); log_parse_environment(); log_open(); umask(0022); /* Don't even consider resuming outside of initramfs. */ if (!in_initrd()) return EXIT_SUCCESS; r = parse_proc_cmdline(parse_proc_cmdline_item); if (r < 0) log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); r = process_resume(); free(arg_resume_dev); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }