SETREGID(2)             COMMAND REFERENCE             SETREGID(2)



NAME
     setregid - set real and effective group ID

SYNOPSIS
     setregid(rgid, egid)
     int rgid, egid;

DESCRIPTION
     The real and effective group ID's of the current process are
     set to rgid and egid respectively.  Only the super-user may
     change the real group ID of a process.  Unprivileged users
     may change the effective group ID to the real group ID, but
     to no other.

     Supplying a value of -1 for either the real or effective
     group ID forces the system to substitute the current ID in
     place of the -1 parameter.

DIAGNOSTICS
     [EPERM]      The current process is not the super-user and a
                  change other than changing the effective group
                  ID to the real group ID was specified.

RETURN VALUE
     Upon successful completion, a value of 0 is returned.
     Otherwise, a value of -1 is returned and errno is set to
     indicate the error.

SEE ALSO
     getgid(2), setreuid(2), and setgid(3c).

























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