login name length

[j773303]

What's the login name maximum length in hpux 11.11 ? Below message are catch from limits.h,
is it possible reatchd 64 characters?



/user/include/limits.h

/*
* The size of the storage required for a login name, in bytes,
* including the terminating null.
*/
# define _POSIX_LOGIN_NAME_MAX 9


/* Maximum Length of a login name. */

# define LOGIN_NAME_MAX 64

[Steven E. Protter]

Without using an LDAP server it pretty much ignores characters beyond 8 characters.

SEP

[Bhuvaneswari Selvaraj]

It is only 8...

man utmp will show that utmp is a structure as follows

struct utmp {
char ut_user[8]; /* User login name */

......

[j773303]

Does any knows the /usr/include/limits.h, why
LOGIN_NAME_MAX define to 64 ?



/* Maximum Length of a login name. */

# define LOGIN_NAME_MAX 64

[Steven E. Protter · Accepted solution]

You might be able to hack that, but I don't think so.

If you suceed any problems with authentication will be blamed on these changes. There are ways with LDAP to get full longer login, say a login name like stevenprotter, but its not built into the base operating system.

If you suceeed in hacking your system to do longer logins, you will be non-standard, and people will have trouble helping you with your system.

If you like taking vacations, you might want to consider your options here and find another way. LDAP will do the trick.

SEP