Long Username / Groupname

The current limit on username / groupname has been enhanced from 8 to 255 bytes. By default HP-UX still has 8 as the limit for usernames / groupnames. With an enabler (lugadmin -e) this limit can be enhanced to 255. Long username / groupname once enabled cannot be disabled in the future. A disable option is not provided due to the impracticality of automatically finding all instances of stable storage that may contain names in excess of the default limits.

Summary of Change

What’s New for Customers Migrating from HP-UX 11i v1 September 2005?

The following sub-systems have been enhanced to support long usernames / groupnames:

Commands:
- acct(1M)
- acctcom(1M)
- at(1)
- cancel(1)
- cron(1M)
- crontab(1)
- finger(1)
- fwtmp(1M)
- groupadd(1M)
- groupdel(1M)
- groupmod(1M)
- groups(1)
- ipcs(1)
- last(1)
- leave(1)
- login(1)
- lp(1)
- lpadmin(1M)
- lpalt(1)
- lpsched(1M)
- lpstat(1)
- ls(1)
- passwd(1)
- pipcs(1)
- ps(1)
- pwgr(1M)
- pwck(1M)
- rcs(1)
- reboot(1M)
- rlpstat(1M)
- sccs(1)
- timex(1)
- top(1)
- uptime(1)
- useradd(1M)
- userdel(1M)
- usermod(1M)
- vipw(1M)
- who(1)
HP-UX C Library (libc):
- initgroups(3C)
- sysconf(2)
A new api ug_display_width(3C) is also provided for applications to query the display width.For more details please refer to “HP-UX C library (libc) - Other Changes”.
File System Commands:
- ff(1M) (HFS and VxFS)
- repquota(1M) (HFS)
- quotacheck(1M) (HFS)
For more details, please refer to “Long Username Support by HFS ff, VxFS 4.1 ff, repquota, quotacheck”.
DCE - Client
Host IDs
IPFilter
Kerberos Client
Kerberos SSAPI Server
PAM framework:
- libpam
- pam_unix(5)
- pam_hpsec(5)
HP-UX auditing subsystem (see audit(5))
ONC+
Internet Services
Legacy SAM and HP-UX Accounts for Users and Groups (ugweb)
CDE Desktop
STM Diagnostics

What’s New for Customers Migrating from HP-UX 11i v2 June 2006?

See “What’s New for Customers Migrating from HP-UX 11i v1 September 2005?”

Impact

You can have username / groupname up to 255 characters, in the above listed products. The syslogd(1M), tsm(1) and shl(1) commands currently do not support long user and group name and are planned for future release. In addition, once the long username / groupname is enabled, it cannot be disabled in future. A disable option is not provided due to the impracticality of automatically finding all instances of stable storage that may contain names in excess of the default limits.

Compatibility

The changes are compatible with previous releases.




	NOTE: Long username/groupname is not supported for trusted systems.

Performance

There is no impact on performance.

Documentation

For further information, see the manpages lugadmin(1M) and ug_display_width(3C), as well as the white paper “Username and Groupname Sizes on HP-UX,” available at http://docs.hp.com.

Obsolescence

Not available.