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Shell Programming and Scripting

Need to add colons

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# 1  
Old 10-20-2006
Need to add colons
Hey guys i need to take the MAC address in the format of

0x00255T08D433

and convert it to

00:25:5T:08Smilie4:33 (it goes :08: D4:33 with no space the forum is making it a big smiley)

for a script i am working on. I am Not quite sure where to start with this one any help would be appreciated.

Sean
# 2  
Old 10-20-2006
Code:
a=`expr substr "0x00255T08D433" 3 2`

or
Code:
b=`echo "0x00255T08D433" | cut -c 3-4`

Code:
c=`expr substr "0x00255T08D433" 5 2
echo ${a}":"${b}

# 3  
Old 10-20-2006
Python alternative

Code:
a = "0x00255T08D433"
c = a[2:]            #c = "00255T08D433"
mac = [c[i:i+2] for i in range(0,len(c),2)]   ##mac = ['00', '25', '5T', '08', 'D4', '33']
print ':'.join(mac)

output:
Code:
00:25:5T:08:D4:33

# 4  
Old 10-23-2006
You can also use sed :
Code:
a=0x00255T08D433
b=$(echo "$a" | sed 's/^0[xX]//;s/\(..\)/\1:/g;s/:$//')
echo "$a --> $b"

Output :
Code:
0x00255T08D433 --> 00:25:5T:08:D4:33


Jean-Pierre.
# 5  
Old 10-23-2006
Sweet all of them work great. I went with aigles's code because it was the shortest but now I need to look into python. Thanks a lot guys.
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