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3. 개발 관련/정리 :: issue 와 resovle

dmesg convert uptime to realtime.

by kyuho.choi 2013. 11. 2.
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I googling for search time stamp in kernel, not uptime.

Here are really good tips for how convert uptime to real time.

 

http://linuxaria.com/article/how-to-make-dmesg-timestamp-human-readable

 
#!/usr/bin/perl
 
use strict;
use warnings;
 
my @dmesg_new = ();
my $dmesg = "/bin/dmesg";
my @dmesg_old = `$dmesg`;
my $now = time();
my $uptime = `cat /proc/uptime | cut -d"." -f1`;
my $t_now = $now - $uptime;
 
sub format_time {
 my @time = localtime $_[0];
 $time[4]+=1;    # Adjust Month
 $time[5]+=1900;    # Adjust Year
 return sprintf '%4i-%02i-%02i %02i:%02i:%02i', @time[reverse 0..5];
}
 
foreach my $line ( @dmesg_old )
{
 chomp( $line );
 if( $line =~ m/\[\s*(\d+)\.(\d+)\](.*)/i )
 {
 # now - uptime + sekunden
 my $t_time = format_time( $t_now + $1 );
 push( @dmesg_new , "[$t_time] $3" );
 }
}
 
print join( "\n", @dmesg_new );
print "\n";
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