macOS launchd help

noire anqa · Feb 14, 2011

I'm having issues with launchd. I have 2 external hdds, one that stores data, the other that's used for backup.

I store my data on encrypted sparsebundles, 6 in total.
I backup to encrypted sparsebundles: 6 corresponding to the data bundles above, and 3 more for my 3 filevault protected accounts.

I have written a series of scripts that will automount these sparsebundles.
If i launch the scripts manually everything works as expected.

If i set up a launchd plist to run when it detects the external drives it launches the script fine, but the volumes never mount.

The scripts require admin privileges (for security) so i've placed the launchd plist in /Library/LaunchDaemons.

To summarise, the launch daemon launches my script fine, the command to mount is executed with root permissions and logged to the terminal, but nothing ever mounts ..

i'm really at a loss - any ideas?

Here is the launchd script i'm using ..

Code:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>me.test.AutomountExternalVolumes</string>
	<key>ProgramArguments</key>
	<array>
		<string>/Extensions/System/Encrypted Sparsebundles/Mount Commands.sh</string>
	</array>
	<key>WatchPaths</key>
	<array>
		<string>/Volumes</string>
	</array>
	<key>RunAtLoad</key>
	<true/>
	<key>KeepAlive</key>
	<false/>
</dict>
</plist>

Here are the scripts if it's useful to see them .. These are the common commands shared across both scripts, in the file at /Extensions/System/Encrypted Sparsebundles/Common Functions.sh

Code:

#!/bin/sh

# Set of shared functions common to mounting and unmounting tasks.


## GENERAL ##

diskHasUUID()
{
	disk_name=${1}; disk_uuid=${2}
	
	# make sure $disk_name isn't empty
	if [[ "${disk_name}" ]]; then
		
		name_uuid=`diskutil info "${disk_name}" | awk '/Volume UUID/ {print $3}'`
		
		if [[ "${name_uuid}" == "${disk_uuid}" ]]; then
			echo "true"
		else
			echo "false"
		fi		

	fi
}

volumeIsMounted()
{
	volume=${1}
	
	# make sure $volume isn't empty
	if [[ "${volume}" ]]; then

		mount | grep "${volume} (" > /dev/null
		
		if [[ ${?} == 0 ]]; then
			echo "true"
		else
			echo "false"
		fi
		
	fi
}

mountStatus()
{
	status_file=${1};
	
	if [[ -f "${status_file}" ]]; then
		echo `cat "${status_file}"`
	
	else
		sudo echo "Unmounted" > "${status_file}"
		echo "Unmounted"
	fi
}

updateMountStatus()
{
	status_file=${1}; status=${2}

	if [[ `mountStatus "${status_file}"` != "${status}" ]]; then
		sudo echo "${status}" > "${status_file}"
	fi
}


## MOUNTING ##

mountVolume()
{
	sparsebundle_path=${1}; mount_point=${2}
	sudo hdiutil attach -nobrowse "${sparsebundle_path}" -mountpoint "${mount_point}" > /dev/null
}

launchUsersOnMountDiskScript()
{
	# launch user scripts to perform custom actions on mount
	scripts_path=${1}; disk_script=${2}
	
	personal_script="/Users/Personal/${scripts_path}/${disk_script}"
	university_script="/Users/University/${scripts_path}/${disk_script}"
	work_script="/Users/Work/${scripts_path}/${disk_script}"
	
	if [[ -f "${personal_script}" ]]; then
		sudo sh "${personal_script}"
	fi
	
	if [[ -f "${university_script}" ]]; then
		sudo sh "${university_script}"
	fi
	
	if [[ -f "${work_script}" ]]; then
		sudo sh "${work_script}"
	fi
}

mountSparsebundle()
{
	volume_path=${1}; disk_name=${2}; mount_path=${3}; sparsebundle=${4};
	status_file="/${volume_path}/${disk_name}/.${mount_path}/Mount Status"

	if `volumeIsMounted "${mount_path}"`; then
		
		updateMountStatus "${status_file}" "Mounted"
		echo "[Did NOT Mount Volume:] ${sparsebundle} on disk ${disk_name}, it is already mounted."

	else
		
		# check for a hdiutil attach process with the sparsebundles path, if a process exists
		# a compaction of the sparsebundle is in progress and we should quit.
		ps -Af | grep "hdiutil attach" | grep "${sparsebundle}" | grep -v "grep" > /dev/null
		if [[ ${?} == 0 ]]; then
			updateMountStatus "${status_file}" "Unmounted"
			echo "[Did NOT Mount Volume:] ${sparsebundle} on disk ${disk_name}, sparsebundle is being mounted by another process."
			exit 0
		fi
		
		sparsebundle_path="/${volume_path}/${disk_name}/.${mount_path}/${sparsebundle}"

		# check for a hdiutil compact process with the sparsebundles path, if a process exists
		# a compaction of the sparsebundle is in progress and we should quit.
		ps -Af | grep "hdiutil compact ${sparsebundle_path}" | grep -v "grep" > /dev/null
		if [[ ${?} == 0 ]]; then
			updateMountStatus "${status_file}" "Unmounted"
			echo "[Did NOT Mount Volume:] ${sparsebundle} on disk ${disk_name}, sparsebundle is being compacted."
			exit 0
		fi		
		
		echo "[Attempting to Mount Volume:] ${sparsebundle} on disk ${disk_name}."
		mount_point="/${volume_path}/${disk_name}/${mount_path}"
		mountVolume "${sparsebundle_path}" "${mount_point}"
		
		if `volumeIsMounted "${mount_path}"`; then
		
			updateMountStatus "${status_file}" "Mounted"
			echo "[Mounted Volume:] ${sparsebundle} on disk ${disk_name}."
			
			scripts_path="Library/Scripts/Applications/Bash/External Disk/On Mount"
			disk_script="${disk_name}/${mount_path}.sh"
			launchUsersOnMountDiskScript "${scripts_path}" "${disk_script}"
		
		else
			updateMountStatus "${status_file}" "Unmounted"
			echo "[Did NOT Mount Volume:] ${sparsebundle} on disk ${disk_name}, unknown error."		
		fi
	
	fi
}


## UNMOUNTING ##

unmountVolume()
{
	mount_point=${1}
	sudo hdiutil detach "${mount_point}" > /dev/null
}

launchUsersBeforeUnmountDiskScript()
{
	# launch user scripts to perform custom actions on mount
	scripts_path=${1}; disk_script=${2}
	
	personal_script="/Users/Personal/${scripts_path}/${disk_script}"
	university_script="/Users/University/${scripts_path}/${disk_script}"
	work_script="/Users/Work/${scripts_path}/${disk_script}"
	
	if [[ -f "${personal_script}" ]]; then
		sudo sh "${personal_script}"
	fi
	
	if [[ -f "${university_script}" ]]; then
		sudo sh "${university_script}"
	fi
	
	if [[ -f "${work_script}" ]]; then
		sudo sh "${work_script}"
	fi
}

quitAllApplicationsAccessingVolume()
{
	volume=${1}
	
	for process in `lsof -t "/${volume}"`; do
		application=`ps acx | awk '{ if ($1 == '${process}') print $5 }'`
		osascript -e "/Extensions/User/Application Controls/Quit & Save.scpt" "${application}" "save-true"
	done
}

unmountSparsebundle()
{
	volume_path=${1}; disk_name=${2}; mount_path=${3}; sparsebundle=${4}; compact=${5};
	status_file="/${volume_path}/${disk_name}/.${mount_path}/Mount Status"

	if `volumeIsMounted "${mount_path}"`; then
		
		scripts_path="Library/Scripts/Applications/Bash/External Disk/On Unmount"
		disk_script="${disk_name}/${mount_path}.sh"
		launchUsersBeforeUnmountDiskScript "${scripts_path}" "${disk_script}"
	
		#quitAllApplicationsAccessingVolume "${mount_point}"

		echo "[Attempting to Unmount Volume:] ${sparsebundle} on disk ${disk_name}."
		mount_point="/${volume_path}/${disk_name}/${mount_path}"
		unmountVolume "${mount_point}"
		
		if `volumeIsMounted "${mount_path}"`; then		
			updateMountStatus "${status_file}" "Mounted"
			echo "[Did NOT Unmount Volume:] ${sparsebundle} on disk ${disk_name}, unknown error."

		else
		
			if "${compact}"; then
				sparsebundle_path="/${volume_path}/${disk_name}/.${mount_path}/${sparsebundle}"
				compactVolume "${sparsebundle_path}"
				echo "[Volume Compacted:] ${sparsebundle} on disk ${disk_name}."
			fi
		
			updateMountStatus "${status_file}" "Unmounted"
			echo "[Volume Unmounted:] ${sparsebundle} on disk ${disk_name}."
		fi
	
	else
		
		updateMountStatus "${status_file}" "Unmounted"
		echo "[Did NOT Unmount Volume:] ${sparsebundle} on disk ${disk_name}, it's already unmounted."
	
	fi
}

compactVolume()
{
	sparsebundle_path=${1};
	sudo hdiutil compact "${sparsebundle_path}" > /dev/null
}		

ejectDisk()
{
	volume_path=${1}; disk_name=${2}
	
	if `volumeIsMounted "${disk_name}"`; then
		sudo diskutil eject "/${volume_path}/${disk_name}" > /dev/null
		
		if `volumeIsMounted "${disk_name}"`; then
			echo "[Failed to Ejected Disk:] ${disk_name}"
		else
			echo "[Ejected Disk:] ${disk_name}"
		fi
	fi
}

ejectDiskOnUnmountsComplete()
{
	volume_path=${1}; disk_name=${2}; sparsebundles=${3}
	mount_path="/${volume_path}/${disk_name}"
		
	for mount_point in `eval echo ${sparsebundles}`; do
		
		# replace dashes (-) with spaces
		mount_point=`echo ${mount_point} | sed 's/-/ /g'`
		
		mount_status=`cat "${mount_path}/.${mount_point}/Mount Status"`
		while [[ "${mount_status}" != "Unmounted" ]]; do
			sleep 1
			mount_status=`cat "${mount_path}/.${mount_point}/Mount Status"`
		done
	
	done
	
	ejectDisk "${volume_path}" "${disk_name}"
}

These are the mount commands, in the file at /Extensions/System/Encrypted Sparsebundles/Mount Commands.sh

Code:

#!/bin/sh

# Script to mount all specified encrypted sparsebundles at the specified paths.
# Can also define custom commands on each volumes mount.


## GENERAL ##

# must run script as root.
if [[ `id -u` != 0 ]]; then
	echo "   [USAGE:] Script must be run with admin priviledges."
    exit -1
fi

# directory housing all neccesary files.
# required so that launchd plists will be able to locate 
# everything they need wherever they are launched from.
directory="/Extensions/System/Encrypted Sparsebundles"

# set of shared functions common to mounting and unmounting tasks.
source "${directory}/Common Functions.sh"


## MAIN ##

## Beta Aquarii (Internal)
disk_name="Beta Aquarii"

# check the disk named $disk_name is in fact the disk we think it is.
if `diskHasUUID "${disk_name}" "8EB6A1B8-2D69-3154-A1B9-7061BAE27699"`; then
	
	# volume path and disk name for the internal disk need to be blank.
	volume_path=""; disk_name=""

	mount_path="Virtual Machines"
	sparsebundle="Encrypted Virtual Machines.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
fi

	
## Delta Aquarii (Marchmont Data Store)
disk_name="Delta Aquarii"

# check the disk named $disk_name is actually mounted, and is in fact the disk we think it is.
if `volumeIsMounted "${disk_name}"` && \
	`diskHasUUID "${disk_name}" "7FC856A4-086A-39DA-BB49-FBD5EF42F34D"`; then
	
	volume_path="Volumes"

	# Documents
	mount_path="Documents"
	sparsebundle="Encrypted Documents.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Movies
	mount_path="Movies"
	sparsebundle="Encrypted Movies.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Music
	mount_path="Music"
	sparsebundle="Encrypted Music.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Software
	mount_path="Software"
	sparsebundle="Encrypted Software.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# To Sort
	mount_path="To Sort"
	sparsebundle="Encrypted To Sort.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Torrents
	mount_path="Torrents"
	sparsebundle="Encrypted Torrents.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &	
		
fi

		
## Zeta Aquarii (Marchmont Backup)
disk_name="Zeta Aquarii"

# check the disk named $disk_name is actually mounted, and is in fact the disk we think it is.
if `volumeIsMounted "${disk_name}"` && \
	`diskHasUUID "${disk_name}" "FD549F08-B7C5-3D85-B4DA-67E747B1316B"`; then
		
	volume_path="Volumes"

	# Beta Aquarii - Personal Backup
	mount_path="Beta Aquarii Backup/Personal Backup"
	sparsebundle="Personal Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Beta Aquarii - University Backup
	mount_path="Beta Aquarii Backup/University Backup"
	sparsebundle="University Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

	# Beta Aquarii - Work Backup
	mount_path="Beta Aquarii Backup/Work Backup"
	sparsebundle="Work Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
		
						
	# Delta Aquarii - Documents
	mount_path="Delta Aquarii Backup/Documents Backup"
	sparsebundle="Documents Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Delta Aquarii - Movies
	mount_path="Delta Aquarii Backup/Movies Backup"
	sparsebundle="Movies Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Delta Aquarii - Music
	mount_path="Delta Aquarii Backup/Music Backup"
	sparsebundle="Music Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Delta Aquarii - Software
	mount_path="Delta Aquarii Backup/Software Backup"
	sparsebundle="Software Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Delta Aquarii - To Sort
	mount_path="Delta Aquarii Backup/To Sort Backup"
	sparsebundle="To Sort Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &
	
	# Delta Aquarii - Torrents
	mount_path="Delta Aquarii Backup/Torrents Backup"
	sparsebundle="Torrents Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &	
		
fi


## Alpha Aquarii (Forum Backup)
disk_name="Alpha Aquarii"

# check the disk named $disk_name is actually mounted, and is in fact the disk we think it is.
if `volumeIsMounted "${disk_name}"` && \
	`diskHasUUID "${disk_name}" "B79B8E10-AC24-3D93-9F6E-5B5A8A594CB7"`; then
		
	volume_path="Volumes"

	# Personal Incremental Backup
	mount_path="Personal Incremental Backup"
	sparsebundle="Personal Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

	# University Incremental Backup
	mount_path="University Incremental Backup"
	sparsebundle="University Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

	# Work Incremental Backup
	mount_path="Work Incremental Backup"
	sparsebundle="Work Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

fi


## Tau Aquarii (Mobile Backup)
disk_name="Tau Aquarii"

# check the disk named $disk_name is actually mounted, and is in fact the disk we think it is.
if `volumeIsMounted "${disk_name}"` && \
	`diskHasUUID "${disk_name}" "5294130A-E658-3D82-B722-E17829FA6555"`; then

	volume_path="Volumes"
		
	# Personal Incremental Backup
	mount_path="Personal Incremental Backup"
	sparsebundle="Personal Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

	# University Incremental Backup
	mount_path="University Incremental Backup"
	sparsebundle="University Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

	# Work Incremental Backup
	mount_path="Work Incremental Backup"
	sparsebundle="Work Encrypted Backup.sparsebundle"
	
	mountSparsebundle "${volume_path}" "${disk_name}" "${mount_path}" "${sparsebundle}" &

fi

exit 0

kainjow · Feb 15, 2011

When you're running it manually, how are you doing this?

Also, you're piping the output of hdiutil attach to /dev/null - why not to a file so you can see what errors it's showing?

Lastly, when you call mountVolume you don't check the return status ${?} before continuing.

noire anqa · Feb 16, 2011

Thanks for the help, i really appreciate it.

By manually i mean running the following in a terminal:
sudo /Extensions/System/Encrypted\ Sparsebundles/Mount\ Commands.sh

As per suggestion i piped everything to a log file; both the outputs of hdiutil, and my own informational echoes.

Here's the log file generated when i run the above command in a terminal:

Code:

Mount Began on Wed Feb 16 14:09:24 GMT 2011
[Tried to mount volumes on disk Beta Aquarii]
[Did NOT Mount Volume:] Encrypted Virtual Machines.sparsebundle on disk , it is already mounted.
[Tried to mount volumes on disk Delta Aquarii]
[Attempting to Mount Volume:] Encrypted Software.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Documents.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Movies.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Torrents.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Music.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted To Sort.sparsebundle on disk Delta Aquarii.
[Tried to mount volumes on disk Zeta Aquarii]
[Attempting to Mount Volume:] Software Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] University Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Work Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Personal Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Documents Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] To Sort Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Movies Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Torrents Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Attempting to Mount Volume:] Music Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk7          	GUID_partition_scheme          	
/dev/disk7s1        	EFI                            	
/dev/disk7s2        	Apple_HFS                      	/Volumes/Delta Aquarii/Music
[Mounted Volume:] Encrypted Music.sparsebundle on disk Delta Aquarii.
/dev/disk8          	GUID_partition_scheme          	
/dev/disk8s1        	EFI                            	
/dev/disk8s2        	Apple_HFS                      	/Volumes/Delta Aquarii/Documents
[Mounted Volume:] Encrypted Documents.sparsebundle on disk Delta Aquarii.
/dev/disk9          	GUID_partition_scheme          	
/dev/disk9s1        	EFI                            	
/dev/disk9s2        	Apple_HFS                      	/Volumes/Delta Aquarii/Torrents
[Mounted Volume:] Encrypted Torrents.sparsebundle on disk Delta Aquarii.
/dev/disk12         	GUID_partition_scheme          	
/dev/disk12s1       	EFI                            	
/dev/disk12s2       	Apple_HFS                      	/Volumes/Delta Aquarii/Movies
/dev/disk10         	GUID_partition_scheme          	
/dev/disk10s1       	EFI                            	
/dev/disk10s2       	Apple_HFS                      	/Volumes/Delta Aquarii/Software
[Mounted Volume:] Encrypted Movies.sparsebundle on disk Delta Aquarii.
[Mounted Volume:] Encrypted Software.sparsebundle on disk Delta Aquarii.
/dev/disk11         	GUID_partition_scheme          	
/dev/disk11s1       	EFI                            	
/dev/disk11s2       	Apple_HFS                      	/Volumes/Delta Aquarii/To Sort
[Mounted Volume:] Encrypted To Sort.sparsebundle on disk Delta Aquarii.
/dev/disk13         	Apple_partition_scheme         	
/dev/disk13s1       	Apple_partition_map            	
/dev/disk13s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/Documents Backup
/dev/disk14         	GUID_partition_scheme          	
/dev/disk14s1       	EFI                            	
/dev/disk14s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/Torrents Backup
[Mounted Volume:] Torrents Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Mounted Volume:] Documents Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk15         	GUID_partition_scheme          	
/dev/disk15s1       	EFI                            	
/dev/disk15s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/Software Backup
[Mounted Volume:] Software Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk17         	GUID_partition_scheme          	
/dev/disk17s1       	EFI                            	
/dev/disk17s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Beta Aquarii Backup/Work Backup
[Mounted Volume:] Work Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk18         	GUID_partition_scheme          	
/dev/disk18s1       	EFI                            	
/dev/disk18s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/Music Backup
[Mounted Volume:] Music Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk19         	GUID_partition_scheme          	
/dev/disk19s1       	EFI                            	
/dev/disk19s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Beta Aquarii Backup/University Backup
[Mounted Volume:] University Encrypted Backup.sparsebundle on disk Zeta Aquarii.
/dev/disk16         	GUID_partition_scheme          	
/dev/disk16s1       	EFI                            	
/dev/disk16s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Beta Aquarii Backup/Personal Backup
/dev/disk20         	GUID_partition_scheme          	
/dev/disk20s1       	EFI                            	
/dev/disk20s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/Movies Backup
/dev/disk21         	GUID_partition_scheme          	
/dev/disk21s1       	EFI                            	
/dev/disk21s2       	Apple_HFS                      	/Volumes/Zeta Aquarii/Delta Aquarii Backup/To Sort Backup
[Mounted Volume:] Personal Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Mounted Volume:] Movies Encrypted Backup.sparsebundle on disk Zeta Aquarii.
[Mounted Volume:] To Sort Encrypted Backup.sparsebundle on disk Zeta Aquarii.

and here's how it looks when launchd initiates it:

Code:

Mount Began on Wed Feb 16 14:02:04 GMT 2011
[Tried to mount volumes on disk Beta Aquarii]
[Did NOT Mount Volume:] Encrypted Virtual Machines.sparsebundle on disk , it is already mounted.
[Tried to mount volumes on disk Delta Aquarii]
[Attempting to Mount Volume:] Encrypted Software.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted To Sort.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Documents.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Torrents.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Music.sparsebundle on disk Delta Aquarii.
[Attempting to Mount Volume:] Encrypted Movies.sparsebundle on disk Delta Aquarii.
[Tried to mount volumes on disk Zeta Aquarii]

EDIT 1:
It looks like hdiutil is crashing, and it produces no errors. Furthermore i have no idea why it attempts to mount all 6 volumes on Delta Aquarii correctly but then fails to even launch them n Zeta Aquarii - they use the same code.

EDIT 2:
No it doesn't! it looks like launchd is crashing, or at least the process assigned to my launchd plist is crashing. I wonder why it crashes when launchd runs it but doesn't when i run it manually?

noire anqa · Feb 24, 2011

I finally got it ..

I wasn't waiting for the mounts to complete before my original script that launches all mounts in a separate thread completes.

So, the mounts would all launch in their own thread, the script launching them would complete, and launchd was terminating the mount commands since they were sub processes of the original script.

The remedy is to block while the subprocesses complete their mounts. Incidentally the documentation does warn against fork and forget behaviour. I should have read it more carefully.

Hopefully anyone else reading this thread will be saved hours of head scratching.

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