[PATCH] mc crashes when temporary directory cannot be created

[Jindrich Novy]

Hi all,

there is a breakage in util.c and utilunix.c related to temporary files
creation. The problem is that if a directory for temporary files cannot
be created mc ends up in infinite loop caused by:

tmpbase = concat_dir_and_file (mc_tmpdir (), prefix);

in mc_mkstemps() which then calls mc_tmpdir() back infinitely and ends
up in a stack underflow.

The attached patch fixes it as it disables the creation of the temporary
files when the temp. directory couldn't be created.

Cheers,
Jindrich
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