文件列表：
ARGV_PTR.C,121,1993-04-25
ATEXIT.C,256,1993-05-01
AUX_ECHO.C,265,1993-06-06
BEEPS.C,384,1993-04-26
CHARCNT.C,274,1993-04-26
CMD_CNT.C,134,1993-04-25
ENVIRON.C,169,1993-07-12
ENV_PTR.C,127,1993-04-25
GETPASS.C,269,1993-05-02
GET_PASS.C,1019,1993-05-02
IO_FIND.C,228,1993-04-26
LINECNT.C,261,1993-04-26
LOWER.C,222,1993-06-06
MORE.C,1024,1993-06-06
MORE15.C,1009,1993-07-11
NEW_TYPE.C,425,1993-04-26
NO_REDIR.C,797,1993-06-06
NUMBER.C,232,1993-04-26
PRT_ECHO.C,265,1993-06-06
PUTENV.C,284,1993-05-01
RET_EXIT.C,427,1993-04-26
SHOWFILE.C,441,1993-04-25
SHOWPATH.C,218,1993-05-01
SHOW_CMD.C,166,1993-04-25
SHOW_ENV.C,183,1993-04-25
TEE.C,200,1993-07-11
UPPER.C,198,1993-04-26
