Re^2: Should I worry about "Inappropriate ioctl for device"?

I was just wondering if this was something I should go through all my work and fix now, or can it wait until later? Is it a critical flaw in my writing? Could an inappropriate use of $! bite me sooner rather than later?

I have been tacking $! onto the end of every string I use in die and warn since I was told to use it there. I had not looked into what it was doing or how it worked. I have been using it because I was told to use it on one occasion, probably when I first used die with an open.

Please forgive me for not knowing my use of $! was not appropriate in the case in my OP. Should this be urgent, I will go through my work and make the needed changes.

My OS is Debian 10 (Buster); my perl versions are 5.28.1 local and 5.16.3 or 5.30.0 on web host depending on the shebang.

No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!

Lady Aleena

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Re^3: Should I worry about "Inappropriate ioctl for device"? by choroba (Cardinal) on Aug 07, 2020 at 14:34 UTC
If you use it just in the messages coming from die or warn, it's confusing, but not critical. Basing the program flow on the value would be a critical problem, though: `... die $! if $!; # Can stop your program for no real reason.` [download] `map{substr$_->[0],$_->[1]\|\|0,1}[\\|\|{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^ARGV,3]`	[reply] [d/l] [select]
Re^4: Should I worry about "Inappropriate ioctl for device"? by Lady_Aleena (Priest) on Aug 07, 2020 at 23:18 UTC
Thank you for explaining this to me. I have removed the confusing use of `$!` from the code above. I will look at my other uses of it as I come across it in my code to make sure it makes sense where it is. Have a nice day! My OS is Debian 10 (Buster); my perl versions are 5.28.1 local and 5.16.3 or 5.30.0 on web host depending on the shebang. *No matter how hysterical I get, my problems are not* time sensitive. So, relax, have a cookie, and a very nice day!** Lady Aleena	[reply] [d/l]
Re^3: Should I worry about "Inappropriate ioctl for device"? by AnomalousMonk (Archbishop) on Aug 07, 2020 at 16:49 UTC
Lady_Aleena: If you didn't run any function that sets $!, or you ran it but it didn't fail, the contents of $! could be anything. E.g.: `c:\@Work\Perl\monks>perl -wMstrict -le "print 0+$!, qq{ == '$!'}; " 9 == 'Bad file descriptor'` [download] Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]


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