Installation guide

5.6.1.1 Kernel Identiﬁcation

The ident keyword identiﬁes the kernel that you are building. In general,

you identify the kernel according to the machine it runs on; by convention,

the kernel name is in uppercase letters. For example, the identiﬁcation for

a kernel that runs on a machine named MYSYS would have the following

/usr/sys/conf/MYSYS conﬁguration ﬁle entry:

ident MYSYS

5.6.1.2 Time Zone

The Tru64 UNIX kernel does not store time zone information. The

timezone keyword sets the initial value of the kernel’s tz structure, which

is used only for backward compatibility with executables that use the

gettimeofday function. The tz structure maintains its initial value as

long as the system is in single-user mode. The tz structure is overwritten

by the local time zone when the system boots to multiuser mode.

By default, the timezone keyword is speciﬁed as follows:

timezone 0 dst 0

Refer to Section 4.4 for information about conﬁguring the time zone.

5.6.1.3 Process Memory Size Limits

Some keywords deﬁne the default and maximum size limits for the data

and stack segments in the address space of a process. The default size is

the initial limit. The maximum size is the hard limit or the absolute limit.

You can use the C shell limit command and the getrlimit and

setrlimit system calls to change these limits. You can set these limits in

the conﬁguration ﬁle by using the following keywords:

Keyword Usage

dfldsiz

Default data segment size limit

maxdsiz

Maximum data segment size limit

dflssiz

Default stack size limit

maxssiz

Maximum stack size limit

5.6.1.4 System V Functionality

The sys_v_mode keyword speciﬁes whether the kernel exhibits System V

behavior when it sets the group ID and ﬁle mode for newly created ﬁles. If

Conﬁguring the Kernel 5–39