NAME
echo — echo (print) arguments
DESCRIPTION
echo
writes its arguments separated by blanks
and terminated by a new-line on the standard output.
It also understands C-like escape conventions;
beware of conflicts with the shell's use of
\:
- \a
write an alert character
- \b
backspace
- \c
print line without appending a new-line
- \f
form-feed
- \n
new-line
- \r
carriage return
- \t
tab
- \v
vertical tab
- \\
backslash
- \n
the 8-bit character whose
ASCII
code is the 1-, 2-, 3- or 4-digit octal number
n,
whose first character must be a zero.
- \0num
write an 8-bit value that is the zero-, one-, two- or three-digit octal number
num
echo
is useful for producing diagnostics in command files
and for sending known data into a pipe.
Notes
Berkeley
echo
differs from this implementation.
The former does not implement the backslash escapes.
However, the semantics of the
\c
escape can be obtained by using the
-n
option.
The echo command implemented as a built-in function of
csh
follows the Berkeley semantics (see
csh(1)).
EXTERNAL INFLUENCES
Environment Variables
LC_CTYPE
determines the interpretation of
arg
as single and/or multi-byte characters.
If
LC_CTYPE
is not specified in the environment or is set to
the empty string, the value of
LANG
is used as a default for each
unspecified or empty variable. If
LANG
is not specified or is set to the empty string,
a default of "C" (see
lang(5))
is used instead of
LANG.
If any internationalization variable contains an invalid setting,
echo
behaves as if all internationalization variables are set to "C".
See
environ(5).
International Code Set Support
Single- and multi-byte character code sets are supported.
AUTHOR
echo
was developed by OSF and HP.
BUGS
No characters are printed after the first
\c.
This is not normally a problem.
STANDARDS CONFORMANCE
echo: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2
