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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <string.h>
#include "alloc-util.h"
#include "capability-util.h"
#include "cap-list.h"
#include "extract-word.h"
#include "macro.h"
#include "missing.h"
#include "parse-util.h"
#include "util.h"
static const struct capability_name* lookup_capability(register const char *str, register GPERF_LEN_TYPE len);
#include "cap-from-name.h"
#include "cap-to-name.h"
const char *capability_to_name(int id) {
if (id < 0)
return NULL;
if (id >= (int) ELEMENTSOF(capability_names))
return NULL;
return capability_names[id];
}
int capability_from_name(const char *name) {
const struct capability_name *sc;
int r, i;
assert(name);
/* Try to parse numeric capability */
r = safe_atoi(name, &i);
if (r >= 0) {
if (i >= 0 && i < (int) ELEMENTSOF(capability_names))
return i;
else
return -EINVAL;
}
/* Try to parse string capability */
sc = lookup_capability(name, strlen(name));
if (!sc)
return -EINVAL;
return sc->id;
}
int capability_list_length(void) {
return (int) ELEMENTSOF(capability_names);
}
int capability_set_to_string_alloc(uint64_t set, char **s) {
_cleanup_free_ char *str = NULL;
unsigned long i;
size_t allocated = 0, n = 0;
assert(s);
for (i = 0; i < cap_last_cap(); i++)
if (set & (UINT64_C(1) << i)) {
const char *p;
size_t add;
p = capability_to_name(i);
if (!p)
return -EINVAL;
add = strlen(p);
if (!GREEDY_REALLOC(str, allocated, n + add + 2))
return -ENOMEM;
strcpy(mempcpy(str + n, p, add), " ");
n += add + 1;
}
if (!GREEDY_REALLOC(str, allocated, n + 1))
return -ENOMEM;
str[n > 0 ? n - 1 : 0] = '\0'; /* truncate the last space, if it's there */
*s = str;
str = NULL;
return 0;
}
int capability_set_from_string(const char *s, uint64_t *set) {
uint64_t val = 0;
const char *p;
assert(set);
for (p = s;;) {
_cleanup_free_ char *word = NULL;
int r;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
if (r == -ENOMEM)
return r;
if (r <= 0)
break;
r = capability_from_name(word);
if (r < 0)
continue;
val |= ((uint64_t) UINT64_C(1)) << (uint64_t) r;
}
*set = val;
return 0;
}
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