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Need tips to format output generated by PSTK cmlet Invoke-NaSsh

[ Edited ]

Hi,

 

Can someone please give me tips to format, cut and copy the output generated by PSTK cmdlet Invoke-NaSsh.

 

The specific requirement what I am looking is to grep few records from the outpt of [Invoke-NaSsh "sp status"]

 

 

 

Thanks

Charan

Re: Need tips to format output generated by PSTK cmlet Invoke-NaSsh

Hello Charan,

 

 

Using regular expressions you can create a custom object which holds the information.  Here is a crude example:

 

$output = "Service Processor           Status: Online
    Firmware Version:   1.0
    Mgmt MAC Address:   00:A0:98:13:9C:22
    Ethernet Link:      up
    Using DHCP:         yes
IPv4 configuration:
    IP Address:         172.22.131.145
    Netmask:            255.255.224.0
    Gateway:            172.22.128.1"

$spStatus = "" | Select Status,Firmware,MAC,LinkState,UsingDHCP,IP_Address,Netmask,Gateway

if ($output -match 'Status:\s*(.*)\b') {
    $matches
    $spStatus.Status = $matches[1]
} else {
    $spStatus.Status = "unknown"
}

if ($output -match 'Firmware Version:\s*(\d*\.\d*)') {
    $matches
    $spStatus.Firmware = $matches[1]
} else {
    $spStatus.Firmware = "unknown"
}

if ($output -match 'Mgmt MAC Address:\s*(.*)\b') {
    $matches
    $spStatus.MAC = $matches[1]
} else {
    $spStatus.MAC = "unknown"
}

if ($output -match 'Ethernet Link:\s*(.*)\b') {
    $matches
    $spStatus.LinkState = $matches[1]
} else {
    $spStatus.LinkState = "unknown"
}

if ($output -match 'Using DHCP:\s*(.*)\b') {
    $matches
    $spStatus.UsingDHCP = $matches[1]
} else {
    $spStatus.UsingDHCP = "unknown"
}

if ($output -match 'IP Address:\s*(.*)\b') {
    $matches
    $spStatus.IP_Address = $matches[1]
} else {
    $spStatus.IP_Address = "unknown"
}

if ($output -match 'Netmask:\s*(.*)\b') {
    $matches
    $spStatus.Netmask = $matches[1]
} else {
    $spStatus.Netmask = "unknown"
}

if ($output -match 'Gateway:\s*(.*)\b') {
    $matches
    $spStatus.Gateway = $matches[1]
} else {
    $spStatus.Gateway = "unknown"
}

$spStatus

Which would output this:

 

Status     : Online
Firmware   : 1.0
MAC        : 00:A0:98:13:9C:22
LinkState  : up
UsingDHCP  : yes
IP_Address : 172.22.131.145
Netmask    : 255.255.224.0
Gateway    : 172.22.128.1

Since it's an object you can address properties during control statements:

 

if ($spStatus.LinkState -ne "up") {
  # do something
}

Hope that helps,

 

Andrew

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Re: Need tips to format output generated by PSTK cmlet Invoke-NaSsh

Many Thanks Andrew; if possible plz explain the regex[$output -match 'Status:\s*(.*)\b'] that you have used as I am new to use regex.

 

 

Charan

Re: Need tips to format output generated by PSTK cmlet Invoke-NaSsh

Regular expressions are used for pattern matching against strings.  They can be used multiple ways, the most common being to check if a string contains some pattern, or to extract some text which matches a pattern.  In this instance we're doing the latter.

 

if ($output -match 'Netmask:\s*(.*)\b') {
    $matches
    $spStatus.Netmask = $matches[1]
} else {
    $spStatus.Netmask = "unknown"
}

The first line checks to see if the string $output matches against the regular expression 'Netmask:\s*(.*)\b'.  If it matches it goes into the if statement.  Breaking out the regex used, there's a couple of things going on...

 

# look for the text "Netmask:" (no quotes, but colon required)
Netmask:

# followed by any number of white space characters, e.g. tab or space
# the \s is short for whitespace, the * is short for 0 or more
\s*

# capture any text after the last white space character
# the parenthesis denotes "capture text", the period is short for any character,
# and the * is short for any number of occurrences
(.*)

# stop capturing at the end of the word.  \b is short for "word boundary"
\b

Assuming it matches the regex, the extracted text will be found in a created array variable, $matches, with the first value ($matches[0]) being equal to the whole of the matched text, and the second and later values ($matches[1], etc.) equal to the extracted values.

 

There is a huge amount of information on regex out there.  There's a decent reference of the special quantifiers and identifiers here.  Regex can be complicated, but they've been around for a long time (Perl uses them heavily), so for most things you can search the internet and find an example or two to base yours off of.

 

Hope that helps.

 

Andrew

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Re: Need tips to format output generated by PSTK cmlet Invoke-NaSsh

^^

Very nice explanation and tip...  Nice output

 

A quick way I do is

 

$v = Invoke-nassh "sp status"

$v = $v.split("`n")

$v | ? {$_ -like "*ip*"}