1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2016 Lennart Poettering
10 #include "alloc-util.h"
11 #include "extract-word.h"
13 #include "string-util.h"
15 const struct namespace_flag_map namespace_flag_map[] = {
16 { CLONE_NEWCGROUP, "cgroup" },
17 { CLONE_NEWIPC, "ipc" },
18 { CLONE_NEWNET, "net" },
19 /* So, the mount namespace flag is called CLONE_NEWNS for historical reasons. Let's expose it here under a more
20 * explanatory name: "mnt". This is in-line with how the kernel exposes namespaces in /proc/$PID/ns. */
21 { CLONE_NEWNS, "mnt" },
22 { CLONE_NEWPID, "pid" },
23 { CLONE_NEWUSER, "user" },
24 { CLONE_NEWUTS, "uts" },
28 const char* namespace_flag_to_string(unsigned long flag) {
31 flag &= NAMESPACE_FLAGS_ALL;
33 for (i = 0; namespace_flag_map[i].name; i++)
34 if (flag == namespace_flag_map[i].flag)
35 return namespace_flag_map[i].name;
37 return NULL; /* either unknown namespace flag, or a combination of many. This call supports neither. */
40 unsigned long namespace_flag_from_string(const char *name) {
46 for (i = 0; namespace_flag_map[i].name; i++)
47 if (streq(name, namespace_flag_map[i].name))
48 return namespace_flag_map[i].flag;
53 #if 0 /// UNNEEDED by elogind
54 int namespace_flag_from_string_many(const char *name, unsigned long *ret) {
55 unsigned long flags = 0;
61 _cleanup_free_ char *word = NULL;
64 r = extract_first_word(&name, &word, NULL, 0);
70 f = namespace_flag_from_string(word);
82 int namespace_flag_to_string_many(unsigned long flags, char **ret) {
83 _cleanup_free_ char *s = NULL;
86 for (i = 0; namespace_flag_map[i].name; i++) {
87 if ((flags & namespace_flag_map[i].flag) != namespace_flag_map[i].flag)
91 s = strdup(namespace_flag_map[i].name);
95 if (!strextend(&s, " ", namespace_flag_map[i].name, NULL))