Open System Services Shell and Utilities Reference Manual (G06.28+, H06.05+)

User Commands (c) chmod(1)

t Save text permission.

In some versions of the UNIX system, setting this permission bit causes the text seg-

ment of a program to remain in virtual memory after its ﬁrst use. Such systems there-

fore do not transfer the program code of frequently accessed programs into the paging

area.

You can specify this permission for OSS ﬁles, but it has no effect. The letter t appears

in the execute position of the all others option to indicate that the ﬁle has this bit (the

sticky bit) set.

If a directory has this bit set, then deletion in it is restricted. An entry in a sticky direc-

tory can be removed or renamed by a user only if the user has write permission for the

directory and the user is the owner of the ﬁle, the owner of the directory, or has

appropriate permissions.

The u, g, and o options indicate that permission is to be taken from the current mode. Omitting

permission is useful only with = to remove all permissions. For example, entering the following

command clears all permission ﬁelds for the user and resets them all to those of the group for

ﬁle1:

u=g ﬁle1

All permission bits not explicitly speciﬁed are cleared.

You can specify multiple symbolic modes, separated with commas. Do not separate items in this

list with spaces. Operations are performed in the order they appear from left to right.

Absolute Mode

Absolute mode lets you use octal notation to set each bit in the permission code. The chmod

command sets the permissions to the permission_code you provide. permission_code is con-

structed by combining with logical OR the following values:

01000000

Sets the trust bit for a TNS/E native loadﬁle regardless of whether an I/O buffer is in a

shared memory segment (the S_TRUSTSHARED bit). On a server running an H-

series RVU, only a user with appropriate privileges (the super ID) can use this setting.

This bit is ignored on a server running a G-series RVU.

00400000

Sets the trust bit for a TNS/E native load ﬁle for cases where an I/O buffer is not in a

shared memory segment (the S_TRUST bit). On a server running an H-series RVU,

only a user with appropriate privileges (the super ID) can use this setting. This bit is

ignored on a server running a G-series RVU.

00004000

Sets user ID on execution (the S_ISUID bit).

00002000

Sets group ID on execution (the S_ISGID bit).

00001000

Sets sticky bit:

• Retains memory image after execution (executable ﬁle).

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