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32 .\" @(#)tcsendbreak.3 8.1 (Berkeley) 6/4/93
33 .\" $FreeBSD: src/lib/libc/gen/tcsendbreak.3,v 1.5.2.3 2001/12/14 18:33:51 ru Exp $
34 .\" $DragonFly: src/lib/libc/gen/tcsendbreak.3,v 1.2 2003/06/17 04:26:42 dillon Exp $
44 .Nd line control functions
52 .Fn tcflow "int fd" "int action"
54 .Fn tcflush "int fd" "int action"
56 .Fn tcsendbreak "int fd" "int len"
60 function waits until all output written to the terminal referenced by
62 has been transmitted to the terminal.
66 function suspends transmission of data to or the reception of data from
67 the terminal referenced by
69 depending on the value of
73 must be one of the following:
74 .Bl -tag -width "TCIOFF"
78 Restart suspended output.
80 Transmit a STOP character, which is intended to cause the terminal to stop
81 transmitting data to the system.
82 (See the description of IXOFF in the
87 Transmit a START character, which is intended to cause the terminal to start
88 transmitting data to the system.
89 (See the description of IXOFF in the
97 function discards any data written to the terminal referenced by
99 which has not been transmitted to the terminal, or any data received
100 from the terminal but not yet read, depending on the value of
104 must be one of the following:
105 .Bl -tag -width "TCIOFLUSH"
107 Flush data received but not read.
109 Flush data written but not transmitted.
111 Flush both data received but not read and data written but not transmitted.
116 function transmits a continuous stream of zero-valued bits for four-tenths
117 of a second to the terminal referenced by
121 parameter is ignored in this implementation.
123 Upon successful completion, all of these functions return a value of zero.
125 If any error occurs, a value of -1 is returned and the global variable
127 is set to indicate the error, as follows:
132 argument is not a valid file descriptor.
136 argument is not a proper value.
138 The file associated with
142 A signal interrupted the
156 functions are expected to be compliant with the