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These special characters may be active in either canonical or noncanonical
input mode, but their use is controlled by the flags IXON and
IXOFF (see Input Modes).
This is the subscript for the START character in the special control character array. termios
.c_cc[VSTART]holds the character itself.The START character is used to support the
IXONandIXOFFinput modes. IfIXONis set, receiving a START character resumes suspended output; the START character itself is discarded. IfIXANYis set, receiving any character at all resumes suspended output; the resuming character is not discarded unless it is the START character.IXOFFis set, the system may also transmit START characters to the terminal.The usual value for the START character is C-q. You may not be able to change this value—the hardware may insist on using C-q regardless of what you specify.
This is the subscript for the STOP character in the special control character array. termios
.c_cc[VSTOP]holds the character itself.The STOP character is used to support the
IXONandIXOFFinput modes. IfIXONis set, receiving a STOP character causes output to be suspended; the STOP character itself is discarded. IfIXOFFis set, the system may also transmit STOP characters to the terminal, to prevent the input queue from overflowing.The usual value for the STOP character is C-s. You may not be able to change this value—the hardware may insist on using C-s regardless of what you specify.