NAME¶
cat, read, nobs - catenate files
SYNOPSIS¶
cat [
file ... ]
read [
-m ] [
-n nline ] [
file ... ]
nobs [
file ... ]
DESCRIPTION¶
Cat reads each
file in sequence and writes it on the standard
output. Thus
- cat file
prints a file and
- cat file1 file2 >file3
concatenates the first two files and places the result on the third.
If no
file is given,
cat reads from the standard input. Output is
buffered in blocks matching the input.
Read copies to standard output exactly one line from the named
file, default standard input. It is useful in interactive
rc(1)
scripts.
The
-m flag causes it to continue reading and writing multiple lines
until end of file;
-n causes it to read no more than
nline
lines.
Read always executes a single
write for each line of input, which
can be helpful when preparing input to programs that expect line-at-a-time
data. It never reads any more data from the input than it prints to the
output.
Nobs copies the named files to standard output except that it removes all
backspace characters and the characters that precede them. It is useful to use
as
$PAGER with the Unix version of
man(1) when run inside a
win (see
acme(1)) window.
SOURCE¶
/src/cmd/cat.c
/src/cmd/read.c
/bin/nobs
SEE ALSO¶
cp(1)
DIAGNOSTICS¶
Read exits with status
eof on end of file or, in the
-n
case, if it doesn't read
nlines lines.
BUGS¶
Beware of and which destroy input files before reading them.