Chapter 6. Tips and techniques 145
The Save Object (SAV) command is slightly confusing since it does not want only the save
device name (for example, TAP01), but the name of its device description in the new IFS
syntax. An example is /qsys.lib/tap01.devd.
Figure 6-3 shows the Save Object display.
Figure 6-3 Using the SAV command to save the OrderManagement directory
You can create directories using the CRTDIR command, which may also be called MKDIR or
MD. And you may delete directories using the RMVDIR command, which may also be called
RMDIR or RD.
6.1.8 Stream file authority
Stream files and directories are subject to authority in a similar way to traditional objects. The
authority of a stream file or directory may be controlled using the WRKAUT command or by
finding it with WRKLNK and typing option 9 next to it.
The most important authorities are the data authorities. These are UNIX style authorities. For
each user, these may be a combination of R, W, and X. R indicates permission to read. W
indicates permission to write (update) to the file and also to delete the file. For UNIX, X
indicates execute permission, which is not relevant to the iSeries, since programs are not
stored in stream files. However, on both UNIX and the iSeries, X for a directory indicates
permission to set the directory as your current directory.
Lack of X permission to a directory does not prevent access to its contents. If a user has
permission to a file within the directory, then they can still access it using a qualified name.
Lack of R permission to a directory prevents access to its contents.
When a directory is created, its authority is the same as its parent. Therefore, if you create a
directory in the root, it has the same authority as the root directory. Before you change the
authority of the root directory, we recommend that you check the authority of your directory
after it is created. If the authority is inappropriate and you already created subdirectories, then
you must correct their authority as well. If the authority of the parent directory is changed after
the subdirectories are created, then its authority is not changed.
A common authority mistake is to fail to allow QEJB or OMUSER write authority to the log
directory and others in which they need to write files. QEJB is the user used by WebSphere
jobs. OMUSER is a typical user for jobs such as JMS. It can be particularly confusing if the
problem is lack of authority to the log directory since the application will be unable to log the
problem.
