Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Re: A mystery?

by vsespb (Hermit)
on Jul 15, 2013 at 23:06 UTC ( #1044469=note: print w/ replies, xml ) Need Help??


in reply to A mystery?

Interesting that it dies under Linux with empty $! (unless I replace sysread with read), even if I replace CRLF with LF.


Comment on Re: A mystery?
Re^2: A mystery?
by BrowserUk (Pope) on Jul 15, 2013 at 23:34 UTC
    Interesting that it dies under Linux with empty $!

    I've no knowledge to address that.

    The only possibility that springs to mind is that *nix sysread really objects to being used on a filehandle that has previously been used in "formatted IO" mode.

    Ie. As the DATA pseudo-handle is actually the same handle used to read the source, which presumably reads it using formatted IO, trying to read it with low-level IO sysread() causes it to throw its hands up in disgust :)

    even if I replace CRLF with LF.

    sysread should be completely oblivious to CRLF/LF -- even if I was asking it to read one or more -- but I'm asking it to read 80 characters only, so there are no newlines (of any flavour) being read.


    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

      Works for me (Linux) if I prepend sysread() with

      binmode( DATA );

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1044469]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (10)
As of 2014-09-02 22:04 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    My favorite cookbook is:










    Results (31 votes), past polls