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Postings from December 2000
> and the conclusion of Hugo was > It would not be in such a minority: it is quite common for applications > to set errno to zero for similar purposes. As has been mentioned, system > library calls do not guarantee to preserve errno just because they are > successful; I see no benefit to perl offering such a guarantee itself - > anyone who needs it can save it easily enough themselves. I wouldn't consider a constant lookup an "operation" in that sense. A constant lookup is supposed to never ever fail, it's just that, a lookup. Under no circumstances should it have side effects like resetting errno. These 3 should all behave the same, but don't: spiff@uplink:~ > perl -wle 'use Fcntl; $!=1; print O_NDELAY; print $!' 2048 spiff@uplink:~ > perl -wle 'use constant O_NDELAY => 2048; $!=1; print O_NDELAY; print $!' 2048 Die Operation ist nicht erlaubt spiff@uplink:~ > perl -wle '$!=1; print 2048; print $!' 2048 Die Operation ist nicht erlaubt - KarstenThread Previous | Thread Next