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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include "alloc-util.h"
#include "extract-word.h"
#include "nsflags.h"
#include "string-util.h"
const struct namespace_flag_map namespace_flag_map[] = {
{ CLONE_NEWCGROUP, "cgroup" },
{ CLONE_NEWIPC, "ipc" },
{ CLONE_NEWNET, "net" },
/* So, the mount namespace flag is called CLONE_NEWNS for historical reasons. Let's expose it here under a more
* explanatory name: "mnt". This is in-line with how the kernel exposes namespaces in /proc/$PID/ns. */
{ CLONE_NEWNS, "mnt" },
{ CLONE_NEWPID, "pid" },
{ CLONE_NEWUSER, "user" },
{ CLONE_NEWUTS, "uts" },
{}
};
int namespace_flags_from_string(const char *name, unsigned long *ret) {
unsigned long flags = 0;
int r;
assert_se(ret);
for (;;) {
_cleanup_free_ char *word = NULL;
unsigned long f = 0;
unsigned i;
r = extract_first_word(&name, &word, NULL, 0);
if (r < 0)
return r;
if (r == 0)
break;
for (i = 0; namespace_flag_map[i].name; i++)
if (streq(word, namespace_flag_map[i].name)) {
f = namespace_flag_map[i].flag;
break;
}
if (f == 0)
return -EINVAL;
flags |= f;
}
*ret = flags;
return 0;
}
int namespace_flags_to_string(unsigned long flags, char **ret) {
_cleanup_free_ char *s = NULL;
unsigned i;
for (i = 0; namespace_flag_map[i].name; i++) {
if ((flags & namespace_flag_map[i].flag) != namespace_flag_map[i].flag)
continue;
if (!strextend_with_separator(&s, " ", namespace_flag_map[i].name, NULL))
return -ENOMEM;
}
if (!s) {
s = strdup("");
if (!s)
return -ENOMEM;
}
*ret = TAKE_PTR(s);
return 0;
}
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