ref: b2537502d9aa8a69d9b4c2dfa1fd1c57116bba3e dir: /include/bits/linux/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"