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cap-list: add capability_set_to_strv()

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This commit is contained in:
Lennart Poettering 2023-02-20 11:46:08 +01:00
parent a90d9ee162
commit 8cf4674d86
3 changed files with 44 additions and 0 deletions
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25
src/basic/cap-list.c
View file

@ -11,6 +11,7 @@
#include "parse-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
static const struct capability_name* lookup_capability(register const char *str, register GPERF_LEN_TYPE len);
@ -102,6 +103,30 @@ int capability_set_to_string(uint64_t set, char **ret) {
return 0;
}
int capability_set_to_strv(uint64_t set, char ***ret) {
_cleanup_strv_free_ char **l = NULL;
int r;
assert(ret);
for (unsigned i = 0; i <= cap_last_cap(); i++) {
const char *p;
if (!FLAGS_SET(set, UINT64_C(1) << i))
continue;
p = CAPABILITY_TO_STRING(i);
assert(p);
r = strv_extend(&l, p);
if (r < 0)
return r;
}
*ret = TAKE_PTR(l);
return 0;
}
int capability_set_from_string(const char *s, uint64_t *ret) {
uint64_t val = 0;
bool good = true;

1
src/basic/cap-list.h
View file

@ -16,4 +16,5 @@ int capability_from_name(const char *name);
int capability_list_length(void);
int capability_set_to_string(uint64_t set, char **ret);
int capability_set_to_strv(uint64_t set, char ***ret);
int capability_set_from_string(const char *s, uint64_t *ret);

18
src/test/test-cap-list.c
View file

@ -8,6 +8,7 @@
#include "capability-util.h"
#include "parse-util.h"
#include "string-util.h"
#include "strv.h"
#include "tests.h"
/* verify the capability parser */
@ -99,6 +100,23 @@ TEST(capability_set_from_string) {
assert_se(c == (UINT64_C(1) << 4) - 1);
}
static void test_capability_set_to_strv_one(uint64_t m, char **l) {
_cleanup_strv_free_ char **b = NULL;
assert_se(capability_set_to_strv(m, &b) >= 0);
assert_se(strv_equal(l, b));
}
TEST(capability_set_to_strv) {
test_capability_set_to_strv_one(0, STRV_MAKE(NULL));
test_capability_set_to_strv_one(UINT64_C(1) << CAP_MKNOD, STRV_MAKE("cap_mknod"));
test_capability_set_to_strv_one((UINT64_C(1) << CAP_MKNOD) |
(UINT64_C(1) << CAP_NET_BIND_SERVICE), STRV_MAKE("cap_net_bind_service", "cap_mknod"));
test_capability_set_to_strv_one((UINT64_C(1) << CAP_MKNOD) |
(UINT64_C(1) << CAP_NET_BIND_SERVICE) |
(UINT64_C(1) << CAP_IPC_OWNER), STRV_MAKE("cap_net_bind_service", "cap_ipc_owner", "cap_mknod"));
}
static void test_capability_set_to_string_invalid(uint64_t invalid_cap_set) {
uint64_t c;