Avoid calling setenv with identical previous contents. #27
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As also stated in the stdlib documentation, setenv() is a bit of a dangerous interface and can cause a lot of headaches. For instance, perl before version 5.38 (at the time of writing, debian stable (bookworm) uses version 5.36) manipulates the `environ` pointer directly. When calling rust (or any other language) code from perl via bindings, calling `setenv` easily leads to crashes[2]. In perl 5.38 this was fixed [1] and perl should itself also stick to using `setenv`. This improves the situation a lot and leaves only the threading issue we cannot solve here. This commit allows the perl code to preset the environment variables to avoid at least this instance of setenv causing crashes. See-also: Perl/perl5#339 See-also: Perl/perl5#859 See-also: [1] Perl/perl5@916a038 See-also: [2] https://bugzilla.proxmox.com/show_bug.cgi?id=4979 Signed-off-by: Wolfgang Bumiller <[email protected]>
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As also stated in the stdlib documentation, setenv() is a bit of a dangerous interface and can cause a lot of headaches. For instance, perl before version 5.38 (at the time of writing, debian stable (bookworm) uses version 5.36) manipulates the
environpointer directly. When calling rust (or any other language) code from perl via bindings, callingsetenveasily leads to crashes[2].In perl 5.38 this was fixed [1] and perl should itself also stick to using
setenv. This improves the situation a lot and leaves only the threading issue we cannot solve here.This commit allows the perl code to preset the environment variables to avoid at least this instance of setenv causing crashes.
See-also: Perl/perl5#339
See-also: Perl/perl5#859
See-also: [1] Perl/perl5@916a038
See-also: [2] https://bugzilla.proxmox.com/show_bug.cgi?id=4979
Note: ideally we could avoid the 2nd query to the env vars, but that would require a breaking change to
ProbeResultto include where the values came from.