z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

chmount
Options
Example
Usage Note
Rule: A chmount user must have UID(0) or at least have READ access to the
SUPERUSER.FILESYS.MOUNT resource found in the UNIXPRIV class.
–a
yes|no|unmount|include,sysname1,...,sysnameN|exclude,sysname1,...,sysnameN
The -a option specifies the AUTOMOVE attribute of the file system in a
sysplex environment where systems are exploiting the shared file system
capability.
–a yes allows the system to automatically move logical ownership for a
specified file system as needed. This is the default.
–a no prevents ownership movement in some situations.
–a umount unmounts the file system in some situations.
–a include,sysname1,...,sysnameN specifies a list of systems, in priority
order, to which the file system's ownership can be moved. include can
be abbreviated to i.
–a exclude,sysname1,...,sysnameN specifies a list of systems, in
priority order, to which the file system's ownership cannot be moved.
exclude can be abbreviated to e.
See z/OS UNIX System Services Planning for details about the behavior of
the AUTOMOVE options.
–D Reassigns logical ownership of a file system to any available file system
participating in shared file system.
–d destsys
To designate a specific reassignment, use –d destsys, where destsys
becomes the logical owner of a file system in a shared file system
environment.
–R Changes the attributes of a specified file system and all file systems
mounted below it in the file system hierarchy.
–r Switches the specified file system to read-only mode.
–w Switches the specified file system to read-write mode.
pathname... specifies the pathnames to use for locating the file systems that need
attributes changed.
To move ownership of the file system that contains /u/wjs to SY1:
chmount -d SY1 /u/wjs
The pathname for chmount/unmount is a node so symlinks can not be followed
unless a trailing slash is added to the symbolic link name. For example, if /etc has
been converted into a symbolic link, /etc -> $SYSNAME/etc, issuing chmount -w
/etc (without the trailing slash) will result in trying to chmount -w /etc ->
$SYSNAME/etc. This may result in RACF errors depending on the security access
for the symlinked file. However, adding the trailing slash, by specifying chmount -w
/etc/ the symlink will be followed and RACF will determine the access from the
symlinked file.
128 z/OS V1R9.0 UNIX System Services Command Reference