initgroups

NAME

       initgroups  -  initialize  the  supplementary group access
       list

SYNOPSIS

       #include <grp.h>
       #include <sys/types.h>

       int initgroups(const char *user, gid_t group);

DESCRIPTION

       The initgroups() function  initializes  the  group  access
       list  by  reading  the group database /etc/group and using
       all groups of which user  is  a  member.   The  additional
       group group is also added to the list.

RETURN VALUE

       The  initgroups()  function returns 0 on success, or -1 if
       an error occurs.

ERRORS

       EPERM  The calling process does not have sufficient privi-
              leges.

       ENOMEM Insufficient  memory  to allocate group information
              structure.

FILES

       /etc/group          group database file

CONFORMING TO

       SVID 3, BSD 4.3

SEE ALSO

       getgroups(2), setgroups(2)