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Full Discussion: Calculate Elapsed Time
Top Forums Shell Programming and Scripting Calculate Elapsed Time Post 52370 by sysera on Thursday 17th of June 2004 01:10:32 AM
Old 06-17-2004
Thank you Ygor, that does exactly what I was looking for. Some day I too will be able to make these insane things up on my own with a little help from examples like yours. Smilie

-Sys

Quote:
Originally posted by Ygor
Convert times to minutes; subtract start time from end time; if negative then started before mignight; print result....
Code:
#!usr/bin/ksh

start="23:45:33 EDT 2004"
end="00:25:06 EDT 2004"

((start_mins = $(expr substr "$start" 1 2)*60 + $(expr substr "$start" 4 2)))
((end_mins = $(expr substr "$end" 1 2)*60 + $(expr substr "$end" 4 2)))
((elapsed_mins = end_mins - start_mins))

if [[ "$elapsed_mins" -lt 0 ]]
then
   ((elapsed_mins += 1440))
fi

if [[ "$elapsed_mins" -gt 59 ]]
then
   print $((elapsed_mins / 60)) hours and $((elapsed_mins % 60)) minutes
else
   print $elapsed_mins minutes
fi

 

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ICONV_SUBSTR(3) 							 1							   ICONV_SUBSTR(3)

iconv_substr - Cut out part of a string

SYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter- nal_encoding")]) DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters. PARAMETERS
o $str - The original string. o $offset - If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero. If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of $str. o $length - If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at $offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also negative, the start position is calculated beforehand according to the rule explained above. o $charset - If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset, whilst the counterpart substr(3) always takes these for byte offsets. RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters. If $str is shorter than $offset characters long, FALSE will be returned. SEE ALSO
substr(3), mb_substr(3), mb_strcut(3). PHP Documentation Group ICONV_SUBSTR(3)
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