2 This file is part of systemd.
4 Copyright 2016 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/>.
22 #include "alloc-util.h"
23 #include "extract-word.h"
25 #include "string-util.h"
27 const struct namespace_flag_map namespace_flag_map[] = {
28 { CLONE_NEWCGROUP, "cgroup" },
29 { CLONE_NEWIPC, "ipc" },
30 { CLONE_NEWNET, "net" },
31 /* So, the mount namespace flag is called CLONE_NEWNS for historical reasons. Let's expose it here under a more
32 * explanatory name: "mnt". This is in-line with how the kernel exposes namespaces in /proc/$PID/ns. */
33 { CLONE_NEWNS, "mnt" },
34 { CLONE_NEWPID, "pid" },
35 { CLONE_NEWUSER, "user" },
36 { CLONE_NEWUTS, "uts" },
40 const char* namespace_flag_to_string(unsigned long flag) {
43 flag &= NAMESPACE_FLAGS_ALL;
45 for (i = 0; namespace_flag_map[i].name; i++)
46 if (flag == namespace_flag_map[i].flag)
47 return namespace_flag_map[i].name;
49 return NULL; /* either unknown namespace flag, or a combination of many. This call supports neither. */
52 unsigned long namespace_flag_from_string(const char *name) {
58 for (i = 0; namespace_flag_map[i].name; i++)
59 if (streq(name, namespace_flag_map[i].name))
60 return namespace_flag_map[i].flag;
65 #if 0 /// UNNEEDED by elogind
66 int namespace_flag_from_string_many(const char *name, unsigned long *ret) {
67 unsigned long flags = 0;
73 _cleanup_free_ char *word = NULL;
76 r = extract_first_word(&name, &word, NULL, 0);
82 f = namespace_flag_from_string(word);
94 int namespace_flag_to_string_many(unsigned long flags, char **ret) {
95 _cleanup_free_ char *s = NULL;
98 for (i = 0; namespace_flag_map[i].name; i++) {
99 if ((flags & namespace_flag_map[i].flag) != namespace_flag_map[i].flag)
103 s = strdup(namespace_flag_map[i].name);
107 if (!strextend(&s, " ", namespace_flag_map[i].name, NULL))