Coreutils' install.c currently compares a context against the
magic string, "<<none>>":
/* If there's an error determining the context, or it has none,
return to allow default context */
if ((matchpathcon (file, st.st_mode, &scontext) != 0) ||
STREQ (scontext, "<<none>>"))
{
if (scontext != NULL)
freecon (scontext);
return;
}
BTW, matchpathcon(8) does, too.
Is there a better way to test for that condition?
It'd be nice if that string were available via a libselinux header,
but I don't see it on rawhide:
$ grep none $(rpm -ql libselinux-devel|grep -F .h)
[Exit 1]
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