11-12-2003
Quote:
Originally posted by frustrated1
I am using your script as follows:
./datecalc -a 2003 11 12 - 1
and it returns 2003 11 11
Is there a way that it can return the value without the spaces?
./datecalc -a 2003 11 12 - 1 | read y m d ; echo ${y}${m}${d}
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COLON(P) POSIX Programmer's Manual COLON(P)
NAME
colon - null utility
SYNOPSIS
: [argument ...]
DESCRIPTION
This utility shall only expand command arguments. It is used when a command is needed, as in the then condition of an if command, but noth-
ing is to be done by the command.
OPTIONS
None.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
Not used.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
Zero.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
: ${X=abc}
if false
then :
else echo $X
fi
abc
As with any of the special built-ins, the null utility can also have variable assignments and redirections associated with it, such as:
x=y : > z
which sets variable x to the value y (so that it persists after the null utility completes) and creates or truncates file z.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE
/The Open Group 2003 COLON(P)