WC(1) OpenBSD Reference Manual WC(1)NAMEwc - word, line, and byte or character count
SYNOPSISwc [-c | -m] [-hlw] [file ...]
DESCRIPTION
The wc utility reads one or more input text files, and, by default,
writes the number of lines, words, and bytes contained in each input file
to the standard output. If more than one input file is specified, a line
of cumulative count(s) for all named files is output on a separate line
following the last file count. wc considers a word to be a maximal
string of characters delimited by whitespace. Whitespace characters are
the set of characters for which the isspace(3) function returns true.
The options are as follows:
-c The number of bytes in each input file is written to the standard
output.
-h Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte,
Petabyte, and Exabyte in order to reduce the number of digits to
four or fewer using powers of 2 for sizes (K=1024, M=1048576,
etc.).
-l The number of lines in each input file is written to the standard
output.
-m The number of characters in each input file is written to the
standard output.
-w The number of words in each input file is written to the standard
output.
When an option is specified, wc only reports the information requested by
that option. The default action is equivalent to the flags -clw having
been specified. The -c and -m options are mutually exclusive.
If no file names are specified, the standard input is used and a file
name is not output. The resulting output is one line of the requested
count(s) with the cumulative sum of all files read in via standard input.
By default, the standard output contains a line for each input file of
the form:
lines words bytes file_name
If the -m option is specified, the number of bytes is replaced by the
number of characters in the listing above. The counts for lines, words,
and bytes (or characters) are integers separated by spaces.
EXIT STATUS
The wc utility exits 0 on success, and >0 if an error occurs.
SEE ALSOisspace(3)STANDARDS
The wc utility is compliant with the IEEE Std 1003.1-2008 (``POSIX'')
specification.
The flag [-h] is an extension to that specification.
Historically, the wc utility was documented to define a word as a
``maximal string of characters delimited by <space>, <tab> or <newline>
characters''. The implementation, however, didn't handle non-printing
characters correctly so that `` ^D^E '' counted as 6 spaces, while
``foo^D^Ebar'' counted as 8 characters. 4BSD systems after 4.3BSD
modified the implementation to be consistent with the documentation.
This implementation defines a ``word'' in terms of the isspace(3)
function, as required by IEEE Std 1003.2-1992 (``POSIX.2'').
HISTORY
A wc utility appeared in Version 1 AT&T UNIX.
OpenBSD 4.9 September 3, 2010 OpenBSD 4.9
