- I387
- ICANON
- ICRNL
- ID_ERR
- IEXTEN
- IGNBRK
- IGNCR
- IGNPAR
- IMAXBEL
- INC
- INDEX_STAT
- INDIRECT_BLOCK
- INIT_C_CC
- INIT_REQUEST
- INIT_TASK
- INLCR
- INPCK
- INTR_CHAR
- INT_MAX
- INT_MIN
- IN_ON_PORT
- IN_ORDER
- IO_BITMAP_SIZE
- ISIG
- ISTRIP
- IS_A_CONSOLE
- IS_A_PTY
- IS_A_PTY_MASTER
- IS_A_PTY_SLAVE
- IS_A_SERIAL
- IS_SEEKABLE
- ITIMER_PROF
- ITIMER_REAL
- ITIMER_VIRTUAL
- IUCLC
- IXANY
- IXOFF
- IXON
- I_BLOCK_SPECIAL
- I_CHAR_SPECIAL
- I_CRNL
- I_DIRECTORY
- I_IXON
- I_NAMED_PIPE
- I_NLCR
- I_NOCR
- I_REGULAR
- I_SET_GID_BIT
- I_SET_UID_BIT
- I_STRP
- I_TYPE
- I_UCLC