POSIX.1-2001 and POSIX.1-2001 TC2 required the functions fpathconf (3), pathconf (3), and sysconffgetc() fgetpos() fgets() fgetwc() fgetws() fmtmsg() fopen() fpathconf() fprintf() fputc() fputs() fputwc() fputws() fread() freopencompile time, and functions sysconf (3), fpathconf (3), pathconf (3), confstr (3) to do this