2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include "alloc-util.h"
25 #include "extract-word.h"
28 #include "parse-util.h"
29 #include "proc-cmdline.h"
30 #include "process-util.h"
31 //#include "special.h"
32 #include "string-util.h"
36 int proc_cmdline(char **ret) {
40 /* For testing purposes it is sometimes useful to be able to override what we consider /proc/cmdline to be */
41 e = secure_getenv("SYSTEMD_PROC_CMDLINE");
53 if (detect_container() > 0)
54 return get_process_cmdline(1, 0, false, ret);
56 return read_one_line_file("/proc/cmdline", ret);
59 int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value, void *data),
62 _cleanup_free_ char *line = NULL;
68 r = proc_cmdline(&line);
74 _cleanup_free_ char *word = NULL;
75 char *value = NULL, *unprefixed;
77 r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
83 /* Filter out arguments that are intended only for the
85 unprefixed = startswith(word, "rd.");
86 if (unprefixed && !in_initrd())
89 value = strchr(word, '=');
93 r = parse_item(strip_prefix && unprefixed ? unprefixed : word, value, data);
101 int get_proc_cmdline_key(const char *key, char **value) {
102 _cleanup_free_ char *line = NULL, *ret = NULL;
109 r = proc_cmdline(&line);
115 _cleanup_free_ char *word = NULL;
118 r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
124 /* Filter out arguments that are intended only for the
126 if (!in_initrd() && startswith(word, "rd."))
130 e = startswith(word, key);
134 r = free_and_strdup(&ret, e);
140 if (streq(word, key))
154 #if 0 /// UNNEEDED by elogind
155 int shall_restore_state(void) {
156 _cleanup_free_ char *value = NULL;
159 r = get_proc_cmdline_key("systemd.restore_state=", &value);
165 return parse_boolean(value);
168 static const char * const rlmap[] = {
169 "emergency", SPECIAL_EMERGENCY_TARGET,
170 "-b", SPECIAL_EMERGENCY_TARGET,
171 "rescue", SPECIAL_RESCUE_TARGET,
172 "single", SPECIAL_RESCUE_TARGET,
173 "-s", SPECIAL_RESCUE_TARGET,
174 "s", SPECIAL_RESCUE_TARGET,
175 "S", SPECIAL_RESCUE_TARGET,
176 "1", SPECIAL_RESCUE_TARGET,
177 "2", SPECIAL_MULTI_USER_TARGET,
178 "3", SPECIAL_MULTI_USER_TARGET,
179 "4", SPECIAL_MULTI_USER_TARGET,
180 "5", SPECIAL_GRAPHICAL_TARGET,
184 static const char * const rlmap_initrd[] = {
185 "emergency", SPECIAL_EMERGENCY_TARGET,
186 "rescue", SPECIAL_RESCUE_TARGET,
190 const char* runlevel_to_target(const char *word) {
192 const char * const *rlmap_ptr = in_initrd() ? rlmap_initrd
198 if (in_initrd() && (word = startswith(word, "rd.")) == NULL)
201 for (i = 0; rlmap_ptr[i] != NULL; i += 2)
202 if (streq(word, rlmap_ptr[i]))
203 return rlmap_ptr[i+1];