1#define _GNU_SOURCE
 2#include "stdio_impl.h"
 3#include <string.h>
 4
 5char *fgetln(FILE *f, size_t *plen)
 6{
 7	char *ret = 0, *z;
 8	ssize_t l;
 9	FLOCK(f);
10	ungetc(getc_unlocked(f), f);
11	if (f->rend && (z=memchr(f->rpos, '\n', f->rend - f->rpos))) {
12		ret = (char *)f->rpos;
13		*plen = ++z - ret;
14		f->rpos = (void *)z;
15	} else if ((l = getline(&f->getln_buf, (size_t[]){0}, f)) > 0) {
16		*plen = l;
17		ret = f->getln_buf;
18	}
19	FUNLOCK(f);
20	return ret;
21}