jak poznat zfailovane open "|..."

[Jan ' Kozo ' Vajda]

:> nejak me honem nenapada, jak nejak hezky poznat, ze open "|neco"
:> zfailovalo napriklad tim, ze 'neco' neexistuje. Muze nekdo poradit?

je nieco zleho na tom, co ponuka man perlfunc ?

  open(OUTPUT, '|sort >foo')  # pipe to sort
    or die "Can't start sort: $!";



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