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Top Forums Shell Programming and Scripting ls -ltr malfunctioning inside the k-shell script Post 302320880 by methyl on Friday 29th of May 2009 08:11:21 AM
Old 05-29-2009
You are changing $TZ at the start of the script which affects the display from "ls".

For example:

Code:
TZ=GMT0BST
ls -lad abc29
-rw-r--r--   1 root       sys              0 May 29 12:59 abc29

TZ=GMT6BST
ls -lad abc29
-rw-r--r--   1 root       sys              0 May 29 06:59 abc29


What is in your system's /etc/TIMEZONE ? If you don't have that file, what is TZ set to normally?

The following technique only temporarily changes TZ and will not affect commands later in the script. For timezones other than UK the offset to get yesterday or tomorrow is relative to your normal offset. Notice that I also state the daylight saving time to match my /etc/TIMEZONE .

Code:
echo "Yesterday : $(TZ=GMT24BST;date)"
echo "Today     : $(date)"
echo "Tomorrow  : $(TZ=GMT-24BST;date)"


Last edited by methyl; 05-29-2009 at 09:36 AM.. Reason: Added example technique
 

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GMDATE(3)								 1								 GMDATE(3)

gmdate - Format a GMT/UTC date/time

SYNOPSIS
string gmdate (string $format, [int $timestamp = time()]) DESCRIPTION
Identical to the date(3) function except that the time returned is Greenwich Mean Time (GMT). PARAMETERS
o $format - The format of the outputted date string. See the formatting options for the date(3) function. o $timestamp - The optional $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a $timestamp is not given. In other words, it defaults to the value of time(3). RETURN VALUES
Returns a formatted date string. If a non-numeric value is used for $timestamp, FALSE is returned and an E_WARNING level error is emitted. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | The valid range of a timestamp is typically from | | | Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 | | | 03:14:07 GMT. (These are the dates that corre- | | | spond to the minimum and maximum values for a | | | 32-bit signed integer). However, before PHP 5.1.0 | | | this range was limited from 01-01-1970 to | | | 19-01-2038 on some systems (e.g. Windows). | | | | | 5.1.1 | | | | | | | There are useful constants of standard date/time | | | formats that can be used to specify the $format | | | parameter. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 gmdate(3) example When run in Finland (GMT +0200), the first line below prints "Jan 01 1998 00:00:00", while the second prints "Dec 31 1997 22:00:00". <?php echo date("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); echo gmdate("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); ?> SEE ALSO
date(3), mktime(3), gmmktime(3), strftime(3). PHP Documentation Group GMDATE(3)
All times are GMT -4. The time now is 01:16 PM.
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