NAME    [Toc]    [Back]

     initgroups - initialize supplementary group IDs

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

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 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.

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() 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().

BSD                              June 4, 1993                              BSD