Setting nodename fails when the name is shorter than 5 characters

[kcgthb]

When setting a switch description to a string 4 characters or shorter, the script fails to execute:

# ./ibswinfo.sh -d lid-801 -S test
Device: lid-801
  Current node description: Quantum Mellanox Technologies
  Set node description to : test
>> Confirm? (y/N) y
Setting new node description... 
# echo $?
1

Using a longer node description works as expected:

# ./ibswinfo.sh -d lid-801 -S test1
Device: lid-801
  Current node description: Quantum Mellanox Technologies
  Set node description to : test1
>> Confirm? (y/N) y
Setting new node description...
done!
# echo $?
0