.\"
.\" Sccsid @(#)cat.1	1.12 (gritter) 4/17/05
.\" Parts taken from cat(1), Unix 7th edition:
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.TH CAT 1 "4/17/05" "Heirloom Toolchest" "User Commands"
.SH NAME
cat \- concatenate and print files
.SH SYNOPSIS
\fBcat\fR [\fB\-suv\fR [\fB\-et\fR]] [\fB\-B\ \fIsize\fR] [\fIfile\fR ...]
.SH DESCRIPTION
.B Cat
reads each file in sequence and writes it
on the standard output. Thus
.RS
.sp
cat file
.sp
.RE
prints the file and
.RS
.sp
cat file1 file2 >file3
.sp
.RE
concatenates the first two files and places the result
on the third.
.PP
If no file is given,
or if the argument `\-' is encountered,
.B cat
reads from the standard input.
.PP
The
.B cat
command accepts the following options:
.TP
.B \-u
Ensures output to be unbuffered.
.TP
.B \-s
Causes
.B cat
to be silent about files that cannot be opened,
read problems and similar error conditions.
.TP
.B \-v
With this option given,
non-printable characters are detected
and printed as `\fB^\fIn\fR' for control characters
and `\fBM\-\fIn\fR' for characters with the high bit set.
.TP
.B \-t
If
.B \-v
is present,
this option causes tab and formfeed characters
to be handled as control characters.
.TP
.B \-e
If
.B \-v
is present,
this option causes end-of-line to be marked with `$'.
.PP
The following option is an extension:
.TP
\fB\-B\ \fIsize\fR
Causes input and output to be performed in
.I size
byte units.
.SH "ENVIRONMENT VARIABLES"
.TP
.BR LANG ", " LC_ALL
See
.IR locale (7).
.TP
.B LC_CTYPE
Determines the mapping of bytes to characters
and the set of printable characters
for the
.B \-v
option.
.SH "SEE ALSO"
cp(1),
pg(1),
pr(1),
locale(7)
.SH NOTES
Beware of `cat a b >a' and `cat a b >b',
which destroy input files before reading them.