Re: Bizarre Proc::Daemon error

[parv]

At the risk of stating the obvious, the isa() test failed as no Proc::Daemon object was returned by Proc::Daemon::Init() call, which in turn had failed, as OP found later (thanks for the update), while changing of user id.

ref test might have been added in 0.10 before eval{ isa() }. You may be using a version around there. (Somebody please give me a clue if it is possible to browse older versions code on MetaCPAN (as it is(or was?) possible on search.cpan).)

[LanX]

> (Somebody please give me a clue if it is possible to browse older versions code on MetaCPAN (as it is(or was?) possible on search.cpan).)

Yes! Click Release Info then you'll find a drop down named Jump to version.

HTH! :)

[parv]

Thanks much, LanX; ITH.

[xtpu2]

I'm using Proc::Daemon version 0.14.

Do you have any ideas why the uid change is causing this failure? I guess I can always work around this problem by starting the script with sudo user, but I like getting things working the way they're supposed to...

Actually, I don't even know if sudo user will work. Could it be that the problem is something about the user I'm trying to use?

[Anonymous Monk]

Proc::Daemon calls &POSIX::setuid but does not check if the call has failed. Try yourself as root (or, via sudo) the user id change ...

perl -MPOSIX=setuid -e '
  sub show { printf qq[%s: real: %d, effective: %d\n] , $_[0] , $< , $
+> }
  show( q[current] );
  $id = 65535; #  Change to the desired value.
  setuid( $id ) or die qq[cannot change to $id: $!];
  show( q[post-change] )
  '

... also check setuid system call documentation for your system.