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Full Discussion: Cron shell script not executing diskutil command
Top Forums UNIX for Dummies Questions & Answers Cron shell script not executing diskutil command Post 302767183 by xbin on Wednesday 6th of February 2013 10:38:01 AM
Old 02-06-2013
If you do not declare a PATH variable in your script or crontab then the PATH will be
Code:
/usr/bin:/bin

hdiutil manipulates disk images. It will unmount attached file systems but you should be using diskutil to unmount them. diskutil may not need the device node to unmount a file system. I think you can use the mount point. If you want to use the device node then the following should work
Code:
mount | awk '/Rebel Base/ {print $1}'

You should not need to unmount and mount a file system in order to make your backup strategy work. It might be time to rethink what you are doing.
This User Gave Thanks to xbin For This Post:
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LEARN ABOUT MOJAVE

umount

UMOUNT(8)						    BSD System Manager's Manual 						 UMOUNT(8)

NAME

     umount -- unmount filesystems

SYNOPSIS

     umount [-fv] special | node
     umount -a | -A [-fv] [-h host] [-t type]

DESCRIPTION

     The umount command calls the unmount(2) system call to remove a special device or the remote node (rhost:path) from the filesystem tree at
     the point node.  If either special or node are not provided, the appropriate information is taken from the list of filesystems provided by
     getfsent(3).

     The options are as follows:

     -a      All the filesystems described via getfsent(3) are unmounted.

     -A      All the currently mounted filesystems except the root are unmounted.

     -f      The filesystem is forcibly unmounted.  Active special devices continue to work, but all other files return errors if further accesses
	     are attempted.  The root filesystem cannot be forcibly unmounted.

     -h host
	     Only filesystems mounted from the specified host will be unmounted.  This option implies the -A option and, unless otherwise speci-
	     fied with the -t option, will only unmount NFS filesystems.

     -t type
	     Is used to indicate the actions should only be taken on filesystems of the specified type.  More than one type may be specified in a
	     comma separated list.  The list of filesystem types can be prefixed with ``no'' to specify the filesystem types for which action
	     should not be taken.  For example, the umount command:

		   umount -A -t nfs,hfs

	     umounts all currently-mounted filesystems of the type NFS and HFS.  (The -a option only unmounts entries in the /etc/fstab list.)

     -v      Verbose, additional information is printed out as each filesystem is unmounted.

NOTES

     Due to the complex and interwoven nature of Mac OS X, umount may fail often.  It is recommended that diskutil(1) (as in, ``diskutil unmount
     /mnt'') be used instead.

SEE ALSO

     unmount(2), getfsent(3), mount(8), diskutil(1)

HISTORY

     A umount command appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution					    May 8, 1995 					 4th Berkeley Distribution
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