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Re: Right tool for the job?

by perrin (Chancellor)
on Sep 24, 2005 at 20:01 UTC ( #494798=note: print w/replies, xml ) Need Help??


in reply to Right tool for the job?

That old "right tool" thing usually gets dragged out as a way of saying "I don't want to use the tool you like." Perl is very good at a much wider range of tasks than most languages, and I don't see much point in learning bash programming or vim regexes when you already have a tool that does a great job.

Learn a new tool when you want to do something that Perl is lousy at, like CPU-intensive number crunching or writing device drivers. Or learn a new tool because you want exposure to new ideas (there is a lot of great writing about software development that is centered around Java or C). But don't feel bad about getting things done with tools that you know.

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[oiskuu]: The useful bits that relate to your process can be found under /proc/self. What information are you thinking of? Tty name?
[tye]: I just daemonized and getlogin() still knew who I had been.
[tye]: perhaps loginuid ? Not that I concede that something not being in /proc means it is not useful.
[Corion]: tye: That's really interesting, but maybe it is because getlogin() returns the name, or the uid, so if that user has been replaced by another user with the same uid in the meantime, that's no problem to the system...
[davido]: or on ubuntu /var/run/utmp
[Corion]: Otherwise, I would imagine that a user with a process still alive would lock that information in memory.
[davido]: so last -f /var/run/utmp on ubuntu provides similar (though more verbose) info
[oiskuu]: glibc getlogin just does ttyname() and falls back on getutline(); it's not security related at all. (reminds me of sendmail and remote finger services of the naive early spam era)
[Corion]: But yes, "who started this process" is interesting information :)
[tye]: no, I really believe that "login user" was added as a fundamental bit of info about each process in order to enhance the usefulness of auditing

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