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Think about Loose Coupling

Re^2: Wget using backquotes

by hacker (Priest)
on Feb 18, 2007 at 19:07 UTC ( #600736=note: print w/replies, xml ) Need Help??

in reply to Re: Wget using backquotes
in thread Wget using backquotes

As I previously mentioned... you want IPC::Run or IPC::Open3...

You do not want to use system here either. Well ok, you CAN use system in "list mode" here to avoid spawning a shell, but this is NOT what zentara showed you, that approach is unsafe.

Using "backticks" (otherwise properly known as "accent grave" is deathly unsafe, and you should never use anything of the sort. From the pod:

IPC::Open3, open3 - open a process for reading, writing, and error handling

Also, you should be using one of the standard LWP modules here, and catching the response codes that come back, instead of relying on a userland binary (which can easily be faked, opening a hole in your system).

If you don't value the security of the system, then go ahead and implement the unsafe, incorrect approach.

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[karlgoethebier]: or no education?
[choroba]: their = his or her
[Discipulus]: anyway once I proposed an automatic font decrease for post below -1, stepping every 5 votes: i'm still thinks it's a good idea but dunno if feasible
[shmem]: ...emulated dual in english
[shmem]: Discipulus: has that been in the CB? or in a PM node proper? for the latter case, can you provide the ID?
[Discipulus]: you seriously can use their in this way in eng?
[Corion]: Meh. $effin_bad_system has an interface breakdown and then loads events in parallel with events overtaking one another instead of being processed sequentially
[shmem]: Discipulus: dunno, but we do all the time ^^
[choroba]: Discipulus I was taught so by a Londoner
[shmem]: Corion: very clear case of missing sequence number

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