--- /dev/null
+#include "stdio_impl.h"
+
+char *fgetln(FILE *f, size_t *plen)
+{
+ char *ret = 0, *z;
+ ssize_t l;
+ FLOCK(f);
+ ungetc(getc_unlocked(f), f);
+ if ((z=memchr(f->rpos, '\n', f->rend - f->rpos))) {
+ ret = (char *)f->rpos;
+ *plen = ++z - ret;
+ f->rpos = (void *)z;
+ } else if ((l = getline(&f->getln_buf, (size_t[]){0}, f)) > 0) {
+ *plen = l;
+ ret = f->getln_buf;
+ }
+ FUNLOCK(f);
+ return ret;
+}