1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include "unit-name.h"
27 static const char *arg_dest = "/tmp";
28 static char **arg_mask = NULL;
29 static bool arg_debug_shell = false;
31 static int parse_proc_cmdline_item(const char *key, const char *value) {
34 if (streq(key, "systemd.mask")) {
37 log_error("Missing argument for systemd.mask= kernel command line parameter.");
45 r = strv_consume(&arg_mask, n);
49 } else if (streq(key, "systemd.debug-shell")) {
52 r = parse_boolean(value);
54 log_error("Failed to parse systemd.debug-shell= argument '%s', ignoring.", value);
58 arg_debug_shell = true;
64 static int generate_mask_symlinks(void) {
68 if (strv_isempty(arg_mask))
71 STRV_FOREACH(u, arg_mask) {
72 _cleanup_free_ char *m = NULL, *p = NULL;
74 m = unit_name_mangle(*u, MANGLE_NOGLOB);
78 p = strjoin(arg_dest, "/", m, NULL);
82 if (symlink("/dev/null", p) < 0) {
83 log_error("Failed to create mask symlink %s: %m", p);
91 static int generate_debug_shell_symlink(void) {
97 p = strappenda(arg_dest, "/default.target.wants/debug-shell.service");
99 mkdir_parents_label(p, 0755);
101 if (symlink(SYSTEM_DATA_UNIT_PATH "/debug-shell.service", p) < 0) {
102 log_error("Failed to create %s symlink: %m", p);
109 int main(int argc, char *argv[]) {
112 if (argc > 1 && argc != 4) {
113 log_error("This program takes three or no arguments.");
120 log_set_target(LOG_TARGET_SAFE);
121 log_parse_environment();
126 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
129 r = generate_mask_symlinks();
131 q = generate_debug_shell_symlink();
135 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;