#126 5.1.7 testsuite writes to predefined name in world writeable directory

[Andreas Metzler]

Hello,

the testsuite writes directly to fixed filenames in /tmp like /tmp/regress. Since the respective commands follow symlinks this not just offers an easy way to break other user's building giflib but also allow to overwrite their files.
ln -s /var/mail/alice /tmp/regress

Also the same filename is used for multiple targets in tests/makefile which breaks parallel building.

possible patch attached.

cu Andreas

[Eric S. Raymond]

Patch tested, accepted, and pushed.