On Sat, 2004-01-10 at 09:58, Steven N. Hirsch wrote: > On Sat, 10 Jan 2004, Lincoln A. Baxter wrote: [snip] > > Ok, the light just went on... One must qualify the value of 'x' when > speaking of perl 5.8.x! In 5.8.0, use of SA_RESTART is a compile-time > choice (not supported, apparently, by the Configure scripts), which > explains why I'm not seeing the desired semantics. In 5.8.1 and 5.8.2 it > is, as you've inferred, a function of your runtime environment > (PERL_SIGNALS=unsafe). > > This begs the further question of why the notion of restartable system > calls is tied so closely to Perl's newer "safe" signal semantics. To me, > these are orthogonal notions. The principle of least surprise would > suggest that they be decoupled, unless I'm overlooking the obvious. > I could not agree more with that statement!
The conclusion I have come to (after a bunch of testing using linux strace and solaris truss, is that, as the new docs say, the ONLY safe way to do it, is use use POSIX::SigAction objects with sigaction(). I will be able to test this on at least 3 *nix's. linux, solaris (5.8), and hpux(11i). Lincoln Lincoln
