|TPUT(1P)||POSIX Programmer's Manual||TPUT(1P)|
tput [−T type] operand...
The following option shall be supported:
- −T type
- Indicate the type of terminal. If this option is not supplied and the TERM variable is unset or null, an unspecified default terminal type shall be used. The setting of type shall take precedence over the value in TERM.
- Display the clear-screen sequence.
- Display the sequence that initializes the user's terminal in an implementation-defined manner.
- Display the sequence that resets the user's terminal in an implementation-defined manner.
If a terminal does not support any of the operations described by these operands, this shall not be considered an error condition.
- Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of POSIX.1‐2008, Section 8.2, Internationalization Variables for the precedence of internationalization variables used to determine the values of locale categories.)
- If set to a non-empty string value, override the values of all the other internationalization variables.
- Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as opposed to multi-byte characters in arguments).
Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
- Determine the location of message catalogs for the processing of LC_MESSAGES.
- Determine the terminal type. If this variable is unset or null, and if the −T option is not specified, an unspecified default terminal type shall be used.
- The requested string was written successfully.
- Usage error.
- No information is available about the specified terminal type.
- The specified operand is invalid.
- An error occurred.
The following sections are informative.
Some terminals use control characters to perform the stated functions, and on such terminals it might make sense to use tput to store the initialization strings in a file or environment variable for later use. However, because other terminals might rely on system calls to do this work, the standard output cannot be used in a portable manner, such as the following non-portable constructs:
ClearVar=`tput clear` tput reset | mailx −s "Wake Up" ddg
- Initialize the terminal according to the type of terminal in the environmental variable TERM. This command can be included in a .profile file.
- Reset a 450 terminal.
tput −T 450 reset
- The only features chosen were those that were likely to be used by human users interacting with a terminal.
- Specifying the full terminfo set was not considered desirable, but the standard developers did not want to select among operands.
- This volume of POSIX.1‐2008 does not attempt to provide applications with sophisticated terminal handling capabilities, as that falls outside of its assigned scope and intersects with the responsibilities of other standards bodies.
The difference between resetting and initializing a terminal is left unspecified as this varies greatly based on hardware types. In general, resetting is a more severe action.
The exit status of 1 is historically reserved for finding out if a Boolean operand is not set. Although the operands were reduced to a minimum, the exit status of 1 should still be reserved for the Boolean operands, for those sites that wish to support them.
The Base Definitions volume of POSIX.1‐2008, Chapter 8, Environment Variables, Section 12.2, Utility Syntax Guidelines
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
|2013||IEEE/The Open Group|