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手册页第 1 部分:用户命令     Oracle Solaris 11.1 Information Library (简体中文)
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ul

- do underlining

用法概要

ul [-i] [-t terminal] [filename]...

描述

ul reads the named filenames (or the standard input if none are given) and translates occurrences of underscores to the sequence which indicates underlining for the terminal in use, as specified by the environment variable TERM. ul uses the /usr/share/lib/terminfo entry to determine the appropriate sequences for underlining. If the terminal is incapable of underlining, but is capable of a standout mode then that is used instead. If the terminal can overstrike, or handles underlining automatically, ul degenerates to cat(1). If the terminal cannot underline, underlining is ignored.

选项

-t terminal

Override the terminal kind specified in the environment. If the terminal cannot underline, underlining is ignored. If the terminal name is not found, no underlining is attempted.

-i

Indicate underlining by a separate line containing appropriate dashes `-'; this is useful when you want to look at the underlining which is present in an nroff(1) output stream on a CRT-terminal.

返回值

ul returns exit code 1 if the file specified is not found.

文件

/usr/share/lib/terminfo/*

属性

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
text/doctools

另请参见

cat(1), man(1), nroff(1), attributes(5)

已知问题

nroff usually generates a series of backspaces and underlines intermixed with the text to indicate underlining. ul makes attempt to optimize the backward motion.