Konstantin Belousov 0ad4dd9a00 The execution of the shebang script requires putting interpreter path,
possible option and script path in the place of argv[0] supplied to
execve(2).  It is possible and valid for the substitution to be shorter
then the argv[0].

Avoid signed underflow in this case.

Submitted by:	Devon H. O'Dell <devon.odell gmail com>
PR:	kern/155321
MFC after:	1 week
2011-03-06 22:59:30 +00:00
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2011-02-21 09:01:34 +00:00
2011-02-21 09:01:34 +00:00