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Re: Reading AND writing on BSD?

by diskcrash (Hermit)
on Apr 20, 2001 at 08:02 UTC ( #74072=note: print w/replies, xml ) Need Help??

in reply to Reading AND writing on BSD?

Hey there A. M.

Would a flush(); be useful?


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Re: Re: Reading AND writing on BSD?
by Anonymous Monk on Apr 20, 2001 at 08:36 UTC
    but im reading everything into a variable first, then seek()ing to the beginning of the file to write to it, then the close() should automatically flush the write buffer, shouldnt it? so where would I put the flush()? the code is as follows:
    open(FH,"+<file.txt") || die($!); @fh = <FH>; # operate on file contents, store shit to print in $fh seek(FH,0,0); print FH $fh; close(FH);
      Have you confirmed that $fh contains data? If there is a bug in the code you omitted and $fh is undefined then the file will not be changed.
      Just a guess, do you mean
      print FH @fh;

      Try some opening one file for reading and one for writing. Does it make it there?
Re: Re: Reading AND writing on BSD?
by Beatnik (Parson) on Apr 20, 2001 at 12:52 UTC
    AFAIK flush(); isnt a default perlfunc...

    ... Quidquid perl dictum sit, altum viditur.

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[tye]: probably something in the init subsystem that does the mounting that you could disable and reboot.
davido needs to close laptop to board flight home from yapc.
[davido]: I'll look into it in a few hours probably.
[davido]: when i do get to that point I think I'll do it in a vm snapshot just in case. :)
[oiskuu]: tye, you were right: loginuid/sessionid are part of task struct if compiled with AUDITSYSCALL. I have some doubts if you should actually depend on that feature.
[Corion]: oiskuu: Depends on what you want to do with that information
[tye]: I'm not depending on that feature. But I could in this environment. I'm using getlogin(). shrug
[Corion]: For benign logging (which user started this DB instance), it's OK
[tye]: We use auditd for security monitoring. So we can rely on auditing being enabled. I'm not sure who would want to not be able to audit. Maybe some VM inside another system with audit?

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