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sets
the group access list of the current user process according to the array
The parameter indicates the number of entries in the array and must
be no more than Only the super-user may set new groups.
A
0 value is returned on success, -1 on error, with an error code stored in
The call will fail if: The value of is greater than The caller
is not the super-user. The address specified for is outside the process
address space.
The function call appeared in
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