NAME    [Toc]    [Back]

     initgroups - initialize supplementary group IDs

SYNOPSIS    [Toc]    [Back]

     #include <unistd.h>

     int
     initgroups(const char *name, gid_t basegid);

DESCRIPTION    [Toc]    [Back]

     The initgroups() function uses the getgrouplist(3)  function
to calculate
     the  supplementary group IDs for the user specified in name.
This group
     list is then set up  for  the  current  process  using  setgroups(2).  The
     basegid  is automatically included in the group list.  Typically this value
 is given as the group number from the password file.

     If the groups database lists more than  NGROUPS  groups  for
name (including
     one for basegid), the later groups are ignored.

RETURN VALUES    [Toc]    [Back]

     The  initgroups()  function returns -1 if it was not invoked
by the superuser.

SEE ALSO    [Toc]    [Back]

     setgroups(2), getgrouplist(3)

HISTORY    [Toc]    [Back]

     The initgroups() function appeared in 4.2BSD.

BUGS    [Toc]    [Back]

     The getgrouplist(3) function called by initgroups() uses the
routines
     based  on  getgrent(3).  If the invoking program uses any of
these routines,
 the group structure will be overwritten in  the  call
to
     initgroups().

OpenBSD      3.6                           June      4,      1993