.TH STTY 2 11/15/79 .SH NAME stty, gtty \- set and retrieve terminal modes .SH SYNOPSIS .B #include .PP .B stty(fildes, arg) .br .B struct sgttyb *arg; .PP .B gtty(fildes, arg) .br .B struct sgttyb *arg; .SH DESCRIPTION .I Gtty stores in the structure pointed to by .I arg status information about the terminal whose file descriptor is in r0 (in the first argument). .PP .I Stty delays until the terminal is quiescent, then sets its status to agree with the structure pointed to by .IR arg . .PP The input and output speeds are set from the first two bytes Both system calls use the structure defined in : .PP .nf struct sgttyb { char sg_ispeed; char sg_ospeed; char sg_erase; char sg_kill; short sg_flags; }; .fi .PP The .I sg_ispeed and .I sg_ospeed fields describe the input and output speeds of the device according to the following table, which corresponds to the DH-11 interface. If DC-11, DL-11 or KL-11 interfaces are used, impossible speed changes are ignored. Symbolic values in the table are as defined in .IR . .PP .nf .ta \w'B9600 'u +5n B0 0 (hang up dataphone) B50 1 50 baud B75 2 75 baud B110 3 110 baud B134 4 134.5 baud B150 5 150 baud B200 6 200 baud B300 7 300 baud B600 8 600 baud B1200 9 1200 baud B1800 10 1800 baud B2400 11 2400 baud B4800 12 4800 baud B9600 13 9600 baud EXTA 14 External A EXTB 15 External B .fi .DT .PP In the current configuration, only 110, 150, 300 and 1200 baud are really supported on dial-up lines. Code conversion and line control required for IBM 2741's (134.5 baud) must be implemented by the user's program. The half-duplex line discipline required for the 202 dataset (1200 baud) is not supplied; full-duplex 212 datasets work fine. .PP The .I sg_erase and .I sg_kill fields of the argument structure specify the erase and kill characters respectively. (Defaults are # and @.) .PP The .I sg_flags field of the argument structure contains several bits which determine the system's treatment of the terminal: .PP .ta \w'ALLDELAY 'u +\w'0100000 'u .nf ALLDELAY 0177400 Delay algorithm selection BSDELAY 0100000 Select backspace delays: BS0 0 BS1 0100000 VTDELAY 0040000 Select form-feed and vertical-tab delays: FF0 0 FF1 0040000 CRDELAY 0030000 Select carriage-return delays: CR0 0 CR1 0010000 CR2 0020000 CR3 0030000 TBDELAY 0006000 Select tab delays: TAB0 0 TAB1 0002000 TAB2 0004000 TAB3 0006000 NLDELAY 0001400 Select new-line delays: NL0 0 NL1 0000400 NL2 0001000 NL3 0001400 EVENP 0000200 Even parity allowed on input (e. g. for M37s) ODDP 0000100 Odd parity allowed on input RAW 0000040 Raw mode: wake up on all characters CRMOD 0000020 Map CR into LF; echo LF or CR as CR-LF ECHO 0000010 Echo (full duplex) LCASE 0000004 Map upper case to lower on input (e. g. M33) CBREAK 0000002 Return each character as soon as it is tped HUPCL 0000001 Hang up (remove `data terminal ready') on last close .DT .fi .PP The delay bits specify how long transmission stops to allow for mechanical or other movement when certain characters are sent to the terminal. In all cases a value of 0 indicates no delay. .PP Backspace delays are currently ignored but will be used for Terminet 300's. .PP If a form-feed/vertical tab delay is specified, it lasts for about 2 seconds. .PP Carriage-return delay type 1 lasts about .08 seconds and is suitable for the Terminet 300. Delay type 2 lasts about .16 seconds and is suitable for the VT05 and the TI 700. Delay type 3 is suitable for the Concept 100. .PP New-line delay type 1 is dependent on the current column and is tuned for Teletype model 37's. Type 2 is useful for the VT05 and is about .10 seconds. Type 3 is unimplemented and is 0. .PP Tab delay type 1 is dependent on the amount of movement and is tuned to the Teletype model 37. Other types are unimplemented and are 0. .PP Characters with the wrong parity, as determined by bits 200 and 100, are ignored. .PP In raw mode, every character is passed immediately to the program without waiting until a full line has been typed. No erase or kill processing is done; the end-of-file character (EOT), the interrupt character (DEL) and the quit character (FS) are not treated specially. .PP Mode 020 causes input carriage returns to be turned into new-lines; input of either CR or LF causes LF-CR both to be echoed (used for GE TermiNet 300's and other terminals without the newline function). .PP The hangup mode 01 causes the line to be disconnected when the last process with the line open closes it or terminates. It is useful when a port is to be used for some special purpose; for example, if it is associated with an ACU used to place outgoing calls. .PP This system call is also used with certain special files other than terminals, but since none of them are part of the standard system the specifications will not be given. .SH "SEE ALSO" stty(1), tty(4), ioctl(2) .SH DIAGNOSTICS Zero is returned if the call was successful; \-1 if the file descriptor does not refer to a terminal. .SH "ASSEMBLER (PDP-11)" (stty = 31.) .br (file descriptor in r0) .br .B sys stty; arg .PP (gtty = 32.) .br (file descriptor in r0) .B sys gtty; arg