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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "format-ifname.h"
#include "string-util.h"
assert_cc(STRLEN("%") + DECIMAL_STR_MAX(int) <= IF_NAMESIZE);
int format_ifname_full(int ifindex, FormatIfnameFlag flag, char buf[static IF_NAMESIZE]) {
if (ifindex <= 0)
return -EINVAL;
if (if_indextoname(ifindex, buf))
return 0;
if (!FLAGS_SET(flag, FORMAT_IFNAME_IFINDEX))
return -errno;
if (FLAGS_SET(flag, FORMAT_IFNAME_IFINDEX_WITH_PERCENT))
assert_se(snprintf_ok(buf, IF_NAMESIZE, "%%%d", ifindex));
else
assert_se(snprintf_ok(buf, IF_NAMESIZE, "%d", ifindex));
return 0;
}
int format_ifname_full_alloc(int ifindex, FormatIfnameFlag flag, char **ret) {
char buf[IF_NAMESIZE];
int r;
assert(ret);
r = format_ifname_full(ifindex, flag, buf);
if (r < 0)
return r;
return strdup_to(ret, buf);
}
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