setreuid
========
:title: Shellcode Compiler Runtime

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int setreuid(uid_t rid, uid_t eid);
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Sets the real user ID to `rid` and the effective user ID to `eid`.  If either parameter is zero, the corresponding ID
is not set.  Returns zero on success, or the negation of the error code on error.

See also
--------
link:geteuid.html[geteuid],
link:getuid.html[getuid],
link:setuid.html[setuid],
link:seteuid.html[seteuid]