2015-08-25 23:52 GMT+02:00 Raffi Enficiaud <raffi.enfici...@mines-paris.org> :
> Le 25/08/15 16:48, Eric Noulard a écrit : > >> I would suggest checking (in CPackDeb generator code) whether if CPack >> has been called in a fakerootED environment. This can be done by >> checking whether if "FAKEROOTKEY" env var is defined or not. >> If fakeroot is already in action then one should not call fakeroot again >> (whatever the fakerootED user is). >> > > Hmmm, unfortunately it does not work. This variable does not exist on the > fakerooted shell. I think there is no "good" way to detect that we are in a > fakerooted environment because their purpose is to mimic the commands as if > the real root user is entering them (and introspection should not be > possible by design). > You are right the design of fakeroot is to mimic... I tested it using erk@capitaine:tmp$ fakeroot bash root@capitaine:tmp# echo $FAKEROOTKEY 489393277 but it does not seem to be set when fakerooting a simple command (outside a shell). > I see two technical solutions: > - either using the system tar: this would not work in the case of cross > compilation (and in some circumstances only) but would work in the other > case. I believe that all the debian packaging tools are just using the > system provided tar, so this should closely mimic the debian-packaging > machinery better, > Cross-compiling is one thing, cross packaging is another. I think trying to cross-package is a very hard task (unless you simply create a bare archive (tar, zip, etc...) - or using a CPACK variable to avoid having fakeroot executed > seems awkward to disable black magic with another black magic spell. > > I see several workarounds/hacks: > - executing with fakeroot in cpack first and in case of failure falling > back to run tar without fakeroot > - detect if the current user is root already > Detecting if user is already root doesn't seems to be such a big hack it should even be robust as well and should be a 2 line modfication in CPackDeb.cmake protecting it even detecting FAKEROOT alltogether. -- Eric
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