Installation guide

2. Use the sysconfig command to set the following attribute to the

proc subsystem of the /etc/sysconfigtab ﬁle:

# enable_extended_uids=

Where the value of n is 1 to enable and 0 to disable

Alternatively, you can use the dxkerneltuner graphical user

interface to set this attribute. Refer to the dxkerneltuner

(8)

reference page, or see Section 5.2.1.2 for an example of its use.

Extended UID and GID support is now enabled or disabled as required.

9.1.4.2 Checking for Extended UID and GID Support

The following sample program demonstrates how to check the maximum

number of UIDs supported by any version of the Tru64 UNIX operating

system. The maximum number of GIDs will always be the same as the

maximum number of UIDs:

#include #include #include

#include

#ifndef TBL_UIDINFO

#define TBL_UIDINFO 56

#endif

main()

{

uid_t uid_max;

errno = 0;

uid_max = table (TBL_UIDINFO, 0, (char *)0, 1, 0);

if ((errno != 0) && ((int)uid_max < 0))

uid_max = UID_MAX;

printf(%d\n", uid_max);

}

9.1.4.3 Applications Affected by Extended UIDs and GIDs

The following programs are affected by extended UID and GID support.

Clusters

Extended UID and GID support can be enabled in a TruCluster Available

Server Software or TruCluster Production Server Software conﬁguration

9–6 Administering User Accounts and Groups