SETGROUPS(2)              386BSD Programmer's Manual              SETGROUPS(2)

NAME
     setgroups - set group access list

SYNOPSIS
     #include <unistd.h>
     #include <sys/param.h>

     int
     setgroups(int ngroups, const int *gidset)

DESCRIPTION
     Setgroups() sets the group access list of the current user process
     according to the array gidset. The parameter ngroups indicates the number
     of entries in the array and must be no more than NGROUPS, as defined in
     <sys/param.h>.

     Only the super-user may set new groups.

RETURN VALUES
     A 0 value is returned on success, -1 on error, with an error code stored
     in errno.

ERRORS
     The setgroups() call will fail if:

     [EPERM]       The caller is not the super-user.

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

SEE ALSO
     getgroups(2),  initgroups(3)

BUGS
     The gidset array should be of type gid_t, but remains integer for
     compatibility with earlier systems.

HISTORY
     The setgroups function call appeared in 4.2BSD.

4.2 Berkeley Distribution       March 10, 1991                               1