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cap-list: rework capability_set_to_string()

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Let's use strextend_with_separator() and CAPABILITY_TO_STRING().
This commit is contained in:
Lennart Poettering 2023-02-20 11:45:07 +01:00
parent c52c4d6974
commit ebb93f3ccf
1 changed files with 15 additions and 22 deletions
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37
src/basic/cap-list.c
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@ -10,6 +10,7 @@
#include "macro.h"
#include "parse-util.h"
#include "stdio-util.h"
#include "string-util.h"
static const struct capability_name* lookup_capability(register const char *str, register GPERF_LEN_TYPE len);
@ -73,35 +74,27 @@ int capability_list_length(void) {
int capability_set_to_string(uint64_t set, char **ret) {
_cleanup_free_ char *str = NULL;
size_t n = 0;
assert(ret);
for (unsigned i = 0; i <= cap_last_cap(); i++)
if (set & (UINT64_C(1) << i)) {
const char *p;
char buf[2 + 16 + 1];
size_t add;
for (unsigned i = 0; i <= cap_last_cap(); i++) {
const char *p;
p = capability_to_name(i);
if (!p) {
xsprintf(buf, "0x%x", i);
p = buf;
}
if (!FLAGS_SET(set, UINT64_C(1) << i))
continue;
add = strlen(p);
p = CAPABILITY_TO_STRING(i);
assert(p);
if (!GREEDY_REALLOC(str, n + add + 2))
return -ENOMEM;
if (!strextend_with_separator(&str, " ", p))
return -ENOMEM;
}
strcpy(mempcpy(str + n, p, add), " ");
n += add + 1;
}
if (!GREEDY_REALLOC(str, n + 1))
return -ENOMEM;
str[n > 0 ? n - 1 : 0] = '\0'; /* truncate the last space, if it's there */
if (!str) {
str = new0(char, 1);
if (!str)
return -ENOMEM;
}
*ret = TAKE_PTR(str);
return 0;