04-11-2007
With ksh at least both echo and print are very fast built-in commands. Dave Korn added print to ksh. At the time ksh was developed Unix was split into a BSD and USG. And the echo statement was different. On BSD, "echo -n" would display no output but on USG it would display "-n". On USG, "echo \\c would display no output, but on BSD it would display "\c". So a portable shell script needed to capture and test the output from "echo -n" and then you could do:
if [ $ECHOTYPE = BSD ] ; then echo -n "enter name - " ; else echo "enter name - \\c" ; fi
Dave felt that rather than trying to solve the echo dichotomy, he would leave "echo" alone and go with "print" which was his own creation. "print" would be the same everywhere. And he added a lot of new stuff to "print".
Later, Posix decreed that the USG echo was standard. And it defined "printf" as a new, more powerful tool. So while Posix encourages the use of "printf", "echo" is now standard too. "print", on the other hand, is a non-standard feature of ksh.
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print(1) User Commands print(1)
NAME
print - shell built-in function to output characters to the screen or window
SYNOPSIS
ksh
print [ -Rnprsu [n]] [arg...]
DESCRIPTION
ksh
The shell output mechanism. With no flags or with flag - or -, the arguments are printed on standard output as described by echo(1).
OPTIONS
The following options are supported:
-n suppresses new-line from being added to the output.
-R
-r (raw mode) ignore the escape conventions of echo. The -R option will print all subsequent arguments and options other than
-n.
-p causes the arguments to be written onto the pipe of the process spawned with |& instead of standard output.
-s causes the arguments to be written onto the history file instead of standard output.
-u [ n ] flag can be used to specify a one digit file descriptor unit number n on which the output will be placed. The default is 1.
EXIT STATUS
The following exit values are returned:
0 Successful operation.
>0 Output file is not open for writing.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
echo(1), ksh(1), attributes(5)
SunOS 5.10 15 Apr 1994 print(1)