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Postings from September 2011
Chris Adams wrote: >Setting a user/group ID by assigning to the perl special variables does >not clear $!, Yes, generally $! is not cleared by successful operations. It is an exact mirror for the C level errno. You need an independent way to see whether the operation succeeded, such as getting -1 from a syscall, and only check $! on failure. Unfortunately, assignment to magic variables doesn't provide a way to report failure. You've run into the edge of the model here: this is where the magic variables stop behaving like variables. I suggest that you use setgid() from the POSIX module. Unfortunately it seems not to have setegid() and friends; patches welcome. -zeframThread Previous