NAME    [Toc]    [Back]

     getgroups -- get group access list

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

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

     int
     getgroups(int gidsetlen, gid_t *gidset);

DESCRIPTION    [Toc]    [Back]

     The getgroups() system call gets the current group access list of the
     user process and stores it in the array gidset.  The gidsetlen argument
     indicates the number of entries that may be placed in gidset.  The
     getgroups() system call returns the actual number of groups returned in
     gidset.  No more than NGROUPS_MAX will ever be returned.  If gidsetlen is
     zero, getgroups() returns the number of supplementary group IDs associated
 with the calling process without modifying the array pointed to by
     gidset.

RETURN VALUES    [Toc]    [Back]

     A successful call returns the number of groups in the group set.  A value
     of -1 indicates that an error occurred, and the error code is stored in
     the global variable errno.

ERRORS    [Toc]    [Back]

     The possible errors for getgroups() are:

     [EINVAL]		The argument gidsetlen is smaller than the number of
			groups in the group set.

     [EFAULT]		The argument gidset specifies an invalid address.

SEE ALSO    [Toc]    [Back]

     setgroups(2), initgroups(3)

HISTORY    [Toc]    [Back]

     The getgroups() system call appeared in 4.2BSD.


FreeBSD 5.2.1			 March 5, 1999			 FreeBSD 5.2.1