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Top Forums Shell Programming and Scripting How to convert hex numbers to decimal ? Post 302304776 by jack2 on Tuesday 7th of April 2009 09:24:22 AM
Old 04-07-2009
Quote:
Originally Posted by sandholm
Bash has built-in conversion tools. Consider the following:

svn1:~# (( x = 0377 )); echo $x
255

This will assign x the octal value of 0377 (the leading 0 indicates an octal value), which returns the decimal value 255.

svn1:~# (( x = 0xFFFE )); echo $x
65534

This will assign x the hex value of 0xFFFE (the leading 0x means hex), which is the decimal value of 65534.
The use of "((" and "))" is shorthand for the "let" statement.
Thanks my dear friend,

for your excellent solution.
Exactly, it works fine under bash.

My cellular modem generates time ticks every 2 s
in the following format
00001F9C

converting the above hex value into decimal value of
8092
I get a number of seconds my modem Internet connection is on.
Converting seconds into minutes, hours, days for totals,
is exactly what lets me control my airtime.

I have compiled Unix dialog utility for mipsel (router)
to let me open GUI window with session time counters via putty ssh.

Yesterday I tried to test some example shell scripts running dialog widgets
to get no flickered data refresh functionality (ncurses library).

I exprimented with running `date` as " some string" 1st parameter .
Succeeded right now and can run dialog window with data update and no flickering.
`date` is updated in gauge widget box.
wait is 1
So I get data refreshed every second.

Now I will try to preset session time and get session left time displayed
in % + gauge bar.

Jack
 

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TIMETRANS(1p)						User Contributed Perl Documentation					     TIMETRANS(1p)

NAME
timetrans - Converts time into time SYNOPSIS
timetrans [units-options] [-count] DESCRIPTION
timetrans converts time from one type of unit to another. If any of the units options are specified, then timetrans will convert those time units into the number of seconds to which they add up. If given the count option, timetrans will convert that number of seconds into the appropriate number of weeks, days, hours, minutes, and seconds. The converted result is printed out. Units options cannot be specified in the same execution as the count option, and vice versa. timetrans is intended for use with DNSSEC-Tools, for calculating a zone's expiration time. OPTIONS
Units Options The converted value of each unit is totaled and a single result printed. -seconds seconds Count of seconds to convert to seconds. -minutes minutes Count of minutes to convert to seconds. -hours hours Count of hours to convert to seconds. -days days Count of days to convert to seconds. -weeks weeks Count of weeks to convert to seconds. Count Option The specified seconds count is converted to the appropriate number of weeks, days, hours, minutes, and seconds. -count seconds Count of seconds to convert to the appropriate set of units. Other Options timetrans has the following miscellaneous options. -Version Displays the version information for timetrans and the DNSSEC-Tools package. EXAMPLES
Example 1: Converting 5 days into seconds $(42)> timetrans -days 5 432000 Example 2: Converting 2 weeks into seconds $(43)> timetrans -w 2 1209600 Example 3: Converting 8 days and 8 hours into seconds $(44)> timetrans -d 8 -hours 8 720000 Example 4: Converting 1 week, 1 day, and 8 hours into seconds $(46)> timetrans -w 1 -days 1 -h 8 720000 Example 5: Converting 14 weeks, 4 days, 21 hours, 8 minutes, and 8 seconds into seconds $(47)> timetrans -w 14 -d 4 -h 21 -m 8 -s 8 8888888 Example 6: Converting 720000 seconds into time units $(48)> timetrans -c 720000 1 week, 1 day, 8 hours Example 7: Converting 1814421 seconds into time units $(49)> timetrans -c 1814421 3 weeks, 21 seconds Example 8: Converting 8888888 seconds into time units $(50)> timetrans -c 8888888 14 weeks, 4 days, 21 hours, 8 minutes, 8 seconds COPYRIGHT
Copyright 2004-2012 SPARTA, Inc. All rights reserved. See the COPYING file included with the DNSSEC-Tools package for details. AUTHOR
Wayne Morrison, tewok@tislabs.com SEE ALSO
zonesigner(8) Net::DNS::SEC::Tools::timetrans.pm(3) perl v5.14.2 2012-06-21 TIMETRANS(1p)
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