ref: ba987573a5ba468d3f1e7237feaf092fc47a444a dir: /include/bits/openbsd/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"