Manual page for CAT(1V)
cat - concatenate and display
SYNOPSIS
cat
[
-
]
[
-benstuv
]
[
filename...
]
SYSTEM V SYNOPSIS
/usr/5bin/cat
[
-
]
[
-estuv
]
[
filename...
]
AVAILABILITY
The System V version of this command is available with the
System V
software installation option. Refer to
[a manual with the abbreviation INSTALL]
for information on how to install optional software.
DESCRIPTION
cat
reads each
filename
in sequence and displays it on the standard output. Thus:
example% cat goodies
displays the contents of
goodies
on the standard output, and
example% cat goodies1 goodies2 > goodies3
concatenates the first two files and places the result on the third.
If no filename argument is given, or if the argument
`-'
is given,
cat
reads from the standard input. If the standard input is
a terminal, input is terminated by an
EOF
condition.
OPTIONS
- -b
-
Number the lines, as
-n,
but omit the line numbers from blank lines.
- -e
-
Display non-printing characters, as
-v,
and in addition display a
$
character at the end of each line.
- -n
-
Precede each line output with its line number.
- -s
-
Substitute a single blank line for multiple adjacent blank lines.
- -t
-
Display non-printing characters, as
-v,
and in addition display
TAB
characters as
^I
(CTRL-I).
- -u
-
Unbuffered.
If
-u
is not used, output is buffered in blocks, or
line-buffered if standard output is a terminal.
- -v
-
Display non-printing characters (with the exception of
TAB
and
NEWLINE
characters)
so that they are visible. Control characters print like
^X
for
CTRL-X;
the
DEL
character (octal 0177) print as
`^?'.
Non-ASCII characters (with the high bit set) are displayed as
M-x
where
M-
stands for
`meta'
and
x
is the character specified by the seven low order bits.
SYSTEM V OPTIONS
- -e
-
If the
-v
option is specified, display a
$
character at the end of each line.
- -s
-
Suppress messages about files which cannot be opened.
- -t
-
If the
-v
option is specified, display
TAB
characters as
^I
(CTRL-I) and
FORMFEED
characters as
^L
(CTRL-L).
- -v
-
Display non-printing character (with the exception of
TAB,
NEWLINE,
and
FORMFEED
characters) so that they are visible.
ENVIRONMENT
The environment variables
LC_CTYPE,
LANG,
and
LC_default
control the character classification
throughout
cat.
On entry to
cat,
these environment variables are checked in the
following order:
LC_CTYPE,
LANG,
and
LC_default.
When a valid value is found,
remaining environment variables for character classification
are ignored.
For example, a new setting for
LANG
does not override the current valid character
classification rules of
LC_CTYPE.
When none of the values is valid,
the shell character
classification defaults to the
POSIX.1 ``C''
locale.
SEE ALSO
cp.1
ex.1
more.1
pg.1v
pr.1v
tail.1
NOTES
Beware of
`cat a b > a'
and
`cat a b > b',
which destroy the input files before reading them.
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
