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SETGROUPS(2)                BSD System Calls Manual               SETGROUPS(2)

NAME
     setgroups -- set group access list

SYNOPSIS
     #include <&lt;sys/types.h>&gt;
     #include <&lt;unistd.h>&gt;

     int
     setgroups(int ngroups, const gid_t *gidset);

DESCRIPTION
     setgroups() sets the group access list of the current user process
     according to the array gidset.  The parameter ngroups indicates the num-
     ber of entries in the array and must be no more than {NGROUPS_MAX}.

     Only the superuser may set new groups.

RETURN VALUES
     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS
     The setgroups() call will fail if:

     [EINVAL]           The value of ngroups is greater than {NGROUPS_MAX}.

     [EPERM]            The caller is not the superuser.

     [EFAULT]           The address specified for gidset is outside the
                        process address space.

SEE ALSO
     getgroups(2), setgid(2), setregid(2), initgroups(3)

HISTORY
     The setgroups() system call first appeared in 4.1cBSD.

BSD                            December 10, 2014                           BSD