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Linux / Unix Command: tput
Command Library

NAME

tput, reset - initialize a terminal or query terminfo database  

SYNOPSIS

tput [-Ttype] capname [parms ... ]
tput [-Ttype] init
tput [-Ttype] reset
tput [-Ttype] longname
tput -S <<
tput -V
 

DESCRIPTION

The tput utility uses the terminfo database to make the values of terminal-dependent capabilities and information available to the shell (see sh(1)), to initialize or reset the terminal, or return the long name of the requested terminal type. tput outputs a string if the attribute (capability name) is of type string, or an integer if the attribute is of type integer. If the attribute is of type boolean, tput simply sets the exit code (0 for TRUE if the terminal has the capability, 1 for FALSE if it does not), and produces no output. Before using a value returned on standard output, the user should test the exit code [$?, see sh(1)] to be sure it is 0. (See the EXIT CODES and DIAGNOSTICS sections.) For a complete list of capabilities and the capname associated with each, see terminfo(1).
-Ttype
indicates the type of terminal. Normally this option is unnecessary, because the default is taken from the environment variable TERM. If -T is specified, then the shell variables LINES and COLUMNS will be ignored,and the operating system will not be queried for the actual screen size.
capname
indicates the attribute from the terminfo database. When termcap support is compiled in, the termcap name for the attribute is also accepted.
parms
If the attribute is a string that takes parameters, the arguments parms will be instantiated into the string. An all-numeric argument will be passed to the attribute as a number.
Only a few terminfo capabilities require string parameters; tput uses a table to decide which to pass as strings. Normally tput uses tparm (3X) to perform the substitution. If no parameters are given for the attribute, tput writes the string without performing the substitution.
-S
allows more than one capability per invocation of tput. The capabilities must be passed to tput from the standard input instead of from the command line (see example). Only one capname is allowed per line. The -S option changes the meaning of the 0 and 1 boolean and string exit codes (see the EXIT CODES section).
Again, tput uses a table and the presence of parameters in its input to decide whether to use tparm (3X), and how to interpret the parameters.
-V
reports the version of ncurses which was used in this program, and exits.
init
If the terminfo database is present and an entry for the user's terminal exists (see -Ttype, above), the following will occur: (1) if present, the terminal's initialization strings will be output (is1, is2, is3, if, iprog), (2) any delays (e.g., newline) specified in the entry will be set in the tty driver, (3) tabs expansion will be turned on or off according to the specification in the entry, and (4) if tabs are not expanded, standard tabs will be set (every 8 spaces). If an entry does not contain the information needed for any of the four above activities, that activity will silently be skipped.
reset
Instead of putting out initialization strings, the terminal's reset strings will be output if present (rs1, rs2, rs3, rf). If the reset strings are not present, but initialization strings are, the initialization strings will be output. Otherwise, reset acts identically to init.
longname
If the terminfo database is present and an entry for the user's terminal exists (see -Ttype above), then the long name of the terminal will be put out. The long name is the last name in the first line of the terminal's description in the terminfo database [see term(5)].

If tput is invoked by a link named reset, this has the same effect as tput reset. See tset for comparison, which has similar behavior.  

EXAMPLES

tput init
Initialize the terminal according to the type of terminal in the environmental variable TERM. This command should be included in everyone's .profile after the environmental variable TERM has been exported, as illustrated on the profile(5) manual page.
tput -T5620 reset
Reset an AT&T 5620 terminal, overriding the type of terminal in the environmental variable TERM.
tput cup 0 0
Send the sequence to move the cursor to row 0, column 0 (the upper left corner of the screen, usually known as the "home" cursor position).
tput clear
Echo the clear-screen sequence for the current terminal.
tput cols
Print the number of columns for the current terminal.
tput -T450 cols
Print the number of columns for the 450 terminal.
bold=`tput smso` offbold=`tput rmso`
Set the shell variables bold, to begin stand-out mode sequence, and offbold, to end standout mode sequence, for the current terminal. This might be followed by a prompt: echo "${bold}Please type in your name: ${offbold}\c"
tput hc
Set exit code to indicate if the current terminal is a hard copy terminal.
tput cup 23 4
Send the sequence to move the cursor to row 23, column 4.
tput cup
Send the terminfo string for cursor-movement, with no parameters substituted.
tput longname
Print the long name from the terminfo database for the type of terminal specified in the environmental variable TERM.

tput -S <<!
> clear
> cup 10 10
> bold
> !
This example shows tput processing several capabilities in one invocation. It clears the screen, moves the cursor to position 10, 10 and turns on bold (extra bright) mode. The list is terminated by an exclamation mark (!) on a line by itself.
 

SEE ALSO

clear(1), stty(1), tabs(1), terminfo(5).


Important: Use the man command (% man) to see how a command is used on your particular computer.

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