ns_mktemp uses the deprecated old POSIX call mktemp(), which should not be used anymore for security r…
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Reduce usage of ns_mktemp in OpenACSns_mktemp uses the deprecated old POSIX call mktemp(), which shouldnot be used anymore for security reasons (race between the namecreation and opening the file). This change removes several usages of"ns_mktemp" from OpenACS and replaces it with calls to thesafe Tcl call "file tempfile ..." (introduced by Tcl 8.6).
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