Formatting Help needed

C

Compiler

Adept
How would i write a script which will add a following content to a file.

File Before running script.

Code:

acpi = 1
apic = 1
builder = 'hvm'
device_model = '/usr/lib/xen/bin/qemu-dm'
disk = ['file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/running_pool/IFLMUD5IM0196/System-hdc.img,hda,w',
',hdc:cdrom,r',
]
File After running the script.
Code:

acpi = 1
apic = 1
builder = 'hvm'
device_model = '/usr/lib/xen/bin/qemu-dm'
disk = ['file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/running_pool/IFLMUD5IM0196/System-hdc.img,hda,w',
'file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/iso_pool/WindowXP/XpBoot.iso,hdc:cdrom,r',
]
Here i have added file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/iso_pool/WindowXP/XpBoot.iso
file.

There fore if i want to rerun the script with another value it should remove the previous entry and enter the new entry.
as below.

File Before running script.
Code:

acpi = 1
apic = 1
builder = 'hvm'
device_model = '/usr/lib/xen/bin/qemu-dm'
disk = ['file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/running_pool/IFLMUD5IM0196/System-hdc.img,hda,w',
'file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/iso_pool/WindowXP/XpBoot.iso,hdc:cdrom,r',
]
File After running the script.
Code:

acpi = 1
apic = 1
builder = 'hvm'
device_model = '/usr/lib/xen/bin/qemu-dm'
disk = ['file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/running_pool/IFLMUD5IM0196/System-hdc.img,hda,w',
'file:/var/ovs/mount/825D2FF7ED2645428AD5AED714B5E777/iso_pool/Window2003/2k3.iso,hdc:cdrom,r',
]
Being a new to unix scripting this task is a big challenge for me and i could not able to solve it.
therefore seeking your help here.
 
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