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Full Discussion: validate timestamp
Top Forums Shell Programming and Scripting validate timestamp Post 302611455 by Chubler_XL on Thursday 22nd of March 2012 09:33:01 PM
Old 03-22-2012
If you have GNU date (supports -d)

This will do it:

Code:
if date -d "$(echo $1 | sed 's/-//;s/-//;s/-/ /')" > /dev/null 2>&1
then
   echo min_tstmp is valid
else
   echo min_tstmp is invalid timestamp
fi
 
if date -d "$(echo $2 | sed 's/-//;s/-//;s/-/ /')" > /dev/null 2>&1
then
   echo max_tstmp is valid
else
   echo max_tstmp is invalid timestamp
fi

or
Code:
D1=$(date -d "$(echo $1 | sed 's/-//;s/-//;s/-/ /')" +%s 2> /dev/null)
D2=$(date -d "$(echo $2 | sed 's/-//;s/-//;s/-/ /')" +%s 2> /dev/null)
if [ -n "$D1" -a -n "$D2" -a ${D1:-0} -gt ${D2:-0} ]
then
   echo "min_tstmp is after max_tstmp"
else
   [ -n "$D1" ] && echo min_tstmp is valid || echo min_tstmp is invalid timestamp 
   [ -n "$D2" ] && echo max_tstmp is valid || echo max_tstmp is invalid timestamp
fi

Last edited by Chubler_XL; 03-22-2012 at 10:49 PM..
 

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LEARN ABOUT PHP

time_sleep_until

TIME_SLEEP_UNTIL(3)							 1						       TIME_SLEEP_UNTIL(3)

time_sleep_until - Make the script sleep until the specified time

SYNOPSIS

       bool time_sleep_until (float  $timestamp)

DESCRIPTION

	Makes the script sleep until the specified $timestamp.

PARAMETERS

	      o $timestamp
		- The timestamp when the script should wake.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|  This  function is now available on Windows plat- |
       |	| forms.					    |
       |	|						    |
       +--------+---------------------------------------------------+
ERRORS
/EXCEPTIONS
	If the specified $timestamp is in the past, this function will generate a E_WARNING.

EXAMPLES

       Example #1

	      A time_sleep_until(3) example

	      <?php

	      //returns false and generates a warning
	      var_dump(time_sleep_until(time()-1));

	      // may only work on faster computers, will sleep up to 0.2 seconds
	      var_dump(time_sleep_until(microtime(true)+0.2));

	      ?>

NOTES

       Note

	       All signals will be delivered after the script wakes up.

SEE ALSO

       sleep(3), usleep(3), time_nanosleep(3), set_time_limit(3).

PHP Documentation Group 												       TIME_SLEEP_UNTIL(3)
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