[C]
CBAUD
CHARS
CIBAUD
CLOCAL
CLOCKS_PER_SEC
CMOS_READ
COLUMNS
CPARENB
CPARODD
CR0
CR1
CR2
CR3
CRDLY
CREAD
CRTSCTS
CS5
CS6
CS7
CS8
CSIZE
CSTOPB
CURRENT_TIME