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What's wrong after assign it to a variable ?

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# 1  
Old 12-22-2012
What's wrong after assign it to a variable ?
Code:
root@intel_5500_server:/tmp# ID_GUEST="01:00.0"
root@intel_5500_server:/tmp# echo $ID_GUEST|sed 's%:%\\:%g'
01\:00.0
root@intel_5500_server:/tmp# ID_GUEST_P=`echo $ID_GUEST|sed 's%:%\\:%g'`
root@intel_5500_server:/tmp# echo $ID_GUEST_P
01:00.0
root@intel_5500_server:/tmp#

if I assign it to variable, \ will be missing
# 2  
Old 12-22-2012
Escape the backslash with another backslash when assigning to var to disable the special meaning of it when echo is performed:

Code:
ID_GUEST_P=`echo $ID_GUEST|sed 's%:%\\\\:%g'`

Code:
echo $ID_GUEST_P
01\:00.0

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