tree 9df11fcde8f095446a38147faa9cad8e87a269e3
parent 0243493148100bb98527ce82f5c929f071aec999
author Priyanga Ramasamy <priyanga24@in.ibm.com> 1633678132 -0500
committer Santosh Puranik <santosh.puranik@in.ibm.com> 1637930589 +0000

VpdTool:Treat NULL char at the end as a terminator

If there is a non-printable null character at the end or if
there are many non printable null characters towards the end of
the buffer, vpd-tool treats null char(s) as a null terminator
and displays the bytes in ascii format.

vpd-tool displays the vector data in hex if,
 - If there are any other non printable character(s) except null.
 - If the non printable null character(s) is at the middle of the
   buffer.

Test:
Tested on rainier

-> vpd-tool output before emplacing this logic:(displays SN in hex)
(where SN has only one non printable NULL at the end)

root@rain135bmc:/tmp# vpd-tool -o -O /system/chassis/motherboard/powersupply3
[
    {
        "/system/chassis/motherboard/powersupply3": {
            "CC": "2B1E",
            "DR": "IBM PS",
            "FN": "03FP302",
            "LocationCode": "U78DB.ND0.WZS000G-E3",
            "PN": "03FP301",
            "SN": "0x594c31304b593038434b364b00",
            "TYPE": "FRU",
            "type": "xyz.openbmc_project.Inventory.Item.PowerSupply"
        }
    }
]

-> vpd-tool output after emplacing this logic:(displays SN in string format)
(by treating end NULL char as NULL terminator)

root@rain135bmc:/tmp# ./vpd-tool -o -O "/system/chassis/motherboard/powersupply3"
[
    {
        "/system/chassis/motherboard/powersupply3": {
            "CC": "2B1E",
            "DR": "IBM PS",
            "FN": "03FP302",
            "LocationCode": "U78DB.ND0.WZS000G-E3",
            "PN": "03FP301",
            "SN": "YL10KY08CK6K",
            "TYPE": "FRU",
            "type": "xyz.openbmc_project.Inventory.Item.PowerSupply"
        }
    }
]

Signed-off-by: Priyanga Ramasamy <priyanga24@in.ibm.com>
Change-Id: I4fb073c49ed3cad117e8dbd0d4da54dcb35f0dc2