text_cmds/ul/ul.1

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  32 .\"     @(#)ul.1        8.1 (Berkeley) 6/6/93
  33 .\" $FreeBSD: src/usr.bin/ul/ul.1,v 1.18 2005/05/21 09:55:09 ru Exp $
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  35 .Dd August 4, 2004
  36 .Dt UL 1
  37 .Os
  38 .Sh NAME
  39 .Nm ul
  40 .Nd do underlining
  41 .Sh SYNOPSIS
  42 .Nm
  43 .Op Fl i
  44 .Op Fl t Ar terminal
  45 .Op Ar
  46 .Sh DESCRIPTION
  47 The
  48 .Nm
  49 utility reads the named files (or standard input if none are given)
  50 and translates occurrences of underscores to the sequence
  51 which indicates underlining for the terminal in use, as specified
  52 by the environment variable
  53 .Ev TERM .
  54 The file
  55 .Pa /etc/termcap
  56 is read to determine the appropriate sequences for underlining.
  57 If the terminal is incapable of underlining, but is capable of
  58 a standout mode then that is used instead.
  59 If the terminal can overstrike,
  60 or handles underlining automatically,
  61 .Nm
  62 degenerates to
  63 .Xr cat 1 .
  64 If the terminal cannot underline, underlining is ignored.
  65 .Pp
  66 The following options are available:
  67 .Bl -tag -width Ds
  68 .It Fl i
  69 Underlining is indicated by a separate line containing appropriate
  70 dashes `\-'; this is useful when you want to look at the underlining
  71 which is present in an
  72 .Xr nroff 1
  73 output stream on a crt-terminal.
  74 .It Fl t Ar terminal
  75 Overrides the terminal type specified in the environment with
  76 .Ar terminal .
  77 .El
  78 .Sh ENVIRONMENT
  79 The
  80 .Ev LANG , LC_ALL , LC_CTYPE
  81 and
  82 .Ev TERM
  83 environment variables affect the execution of
  84 .Nm
  85 as described in
  86 .Xr environ 7 .
  87 .Sh EXIT STATUS
  88 .Ex -std
  89 .Sh SEE ALSO
  90 .Xr colcrt 1 ,
  91 .Xr man 1 ,
  92 .Xr nroff 1
  93 .Sh HISTORY
  94 The
  95 .Nm
  96 command appeared in
  97 .Bx 3.0 .
  98 .Sh BUGS
  99 The
 100 .Xr nroff 1
 101 command usually outputs a series of backspaces and underlines intermixed
 102 with the text to indicate underlining.
 103 No attempt is made to optimize
 104 the backward motion.