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

Exit Values
Related Information
mv, rm, rmdir
0 Successful completion
1 Failure due to any of the following:
v No write permission for directory containing link to be removed
v Attempting to unlink a file that does not exist
v Pathname specified is a directory
2 Failure due to incorrect number of arguments specified
unmount — Remove a file system from the file hierarchy
Format
Description
Options
unmount [–R] [–v] [–o normal|drain|immediate|force|reset] pathname...
The unmount shell command, located in /usr/sbin, unmounts file systems.
Note: An unmount user must have UID(0) or at least have READ access to the
SUPERUSER.FILESYS.MOUNT resource found in the UNIXPRIV class.
–R Unmounts the specified file system and all the file systems below it in the
file system hierarchy.
–o normal|drain|immediate|force|reset
normal
unlink
Specifies that if no user is accessing any of the files in the specified
file system, the system processes the unmount request. Otherwise,
the system rejects the unmount request. This is the default
drain Specifies that an unmount drain request is to be made. The system
will wait for all use of the file system to be ended normally before
the unmount request is processed or until another UNMOUNT
command is issued.
Note: Currently unmount –o drain is not supported in a sysplex. If
an unmount –o drain is issued in a sysplex, the following
behavior is exhibited:
v If there is no activity in the file system, unmount -o drain
will perform the unmount, but it will behave like an
unmount normal.
v If there is activity in the file system, unmount -o drain will
return a Return_value of -1 with Return_code EINVAL and
Reason_code JrNotSupInSysplex.
immediate
The system will unmount the file system immediately. Any users
accessing files in the specified file system will receive failing return
Chapter 2. Shell command descriptions 729