58 lines
1.1 KiB
Groff
58 lines
1.1 KiB
Groff
.Dd February 19, 2015
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.Dt COLS 1
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.Os sbase
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.Sh NAME
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.Nm cols
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.Nd columnize output
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.Sh SYNOPSIS
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.Nm
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.Op Fl c Ar num
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.Op Ar file ...
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.Sh DESCRIPTION
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.Nm
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reads each
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.Ar file
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in sequence and writes them to stdout, in as many vertical
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columns as will fit in
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.Ar num
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character columns. If no
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.Ar file
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is given,
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.Nm
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reads from stdin.
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.Pp
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By default
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.Nm cols
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tries to figure out the width of the output
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device. If that fails, it defaults to 65 chars.
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.Sh OPTIONS
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.Bl -tag -width Ds
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.It Fl c Ar chars
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Set the maximum number of character columns to use
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(unless the input contains lines longer than
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.Ar num
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characters).
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.El
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.Sh ENVIRONMENT
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.Bl -tag -width COLUMNS
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.It COLUMNS
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If this variable is set, the value is used as the
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width of the output device.
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.El
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.Sh HISTORY
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.Nm
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is similar to
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.Xr mc 1
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in Plan 9. It was renamed to
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.Nm
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to avoid the name collision with the popular file manager
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Midnight Commander.
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.Sh CAVEATS
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This implementation of
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.Nm
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assumes that each UTF-8 code point occupies one character cell,
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and thus mishandles TAB characters (among others).
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.Pp
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.Nm
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currently mangles files which contain embedded NULs.
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