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Re: Reopen file when contents changed?

by merlyn (Sage)
on Jun 07, 2005 at 14:26 UTC ( #464316=note: print w/replies, xml ) Need Help??

in reply to Reopen file when contents changed?

I'm not sure about things in /proc Normally, if you stat the file and record dev/ino/ctime, and then read the data, you can simply go into a sleep-1 loop until the stat of dev/ino/ctime changes.

For example:

my @base = stat($FILE); my $base = "@base[0,1,10]"; # dev/ino/ctime while (1) { ... read $FILE here, and process it ... while (1) { my @new = stat($FILE); my $new = "@new[0,1,10]"; # current dev/ino/ctime if ($base ne $new) { # changed $base = $new; # reset last; # restart outer loop } sleep 1; # delay because no change } }

-- Randal L. Schwartz, Perl hacker
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