ref: 3c2610fd4650e8e7bb396d86141ada54e52e368d dir: /include/bits/dragonfly/sys/stdio.h/
#define BUFSIZ 512 #define FILENAME_MAX 256 #define FOPEN_MAX 16 #define TMP_MAX 25 #define L_tmpnam 256 #define _TMPNAME "/tmp/tmp.0000000"