Regix in grep or something like this

ruby-talk
1

Hi

/dev/cciss/c0d11p1
/dev/cciss/c0d1p1
/dev/cciss/c0d2p1

#Function to check if the Hardrive is mounted or not
def mount_check(drive_path)
        chk_mount=`df -h | grep '#{drive_path}' | wc -l `
        return chk_mount
end

problem is :
its taking
c0d1 also c0d11

but if pass variable c0d1
i just want to get line with has c0d1 , not c0d11

but confused how to do

Can any one please help me

···

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2

`man grep`

···

On Fri, Sep 7, 2012 at 1:41 PM, Ferdous ara <lists@ruby-forum.com> wrote:

Can any one please help me

--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com

twitter: @hassan

3

hi
thanks
but i think i know about grep..
but dont know what regix to use ..

···

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4

Uh, here we go again. What did you try after your last post. You
should be able to do this with only the most basic of Ruby knowledge.
This is what "df -h" gives me...

# Filesystem Size Used Avail Capacity Mounted on
# /dev/disk0s2 465Gi 389Gi 75Gi 84% /
# devfs 191Ki 191Ki 0Bi 100% /dev
# map -hosts 0Bi 0Bi 0Bi 100% /net
# map auto_home 0Bi 0Bi 0Bi 100% /home
# /dev/disk2s2 1.4Ti 504Gi 893Gi 37% /Volumes/Backup
# /dev/disk1s6 466Gi 305Gi 161Gi 66% /Volumes/Spare

def mount_check(drive_path)
  %x{df -h}.split(/\n/).each do |line|
    if line.split(/\s+/).first == drive_path
      return true
    end
  end

  return false
end

mount_check("/dev/disk0s2") => true

The only point to note is you must give the full drive path,
/dev/disk0s2, rather than just part of it, such as disk0s2.

Also this solution and your solution has absolutely nothing to do with
regexs at all.

Please at least attempt to learn how to program before posting another question.

5

HI
thanks for the solution
problem is i am not that good in Regix.. and Currently I have very less
time to learn ..
as I am doing some project and trying to finish this quicly so i am
just asking those small bit when i dont know..
may be after i finish the projet.. i will give more time to lear n

the regix i am affer is

/dev/cciss/c0d11p1
/dev/cciss/c0d1p1

c0d1
its end with number
then Charater

p1

also problem is :
i need to provide only c0d1
i cant provide full path

···

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Posted via http://www.ruby-forum.com/.

6

Sorry.. is not it better to give the solution rather then pulling some
else's Leg ???

ok (I dont know grep,Surrender)
would be able to tell me
which Grep parameter will give me output :

only /dev/cciss/c0d1p1 line by providing c0d1 ,(not cod1p1)

From here :
/dev/cciss/c0d1p1
/dev/cciss/c0d10p1
/dev/cciss/c0d11p1
/dev/cciss/c0d12p1

Thanks

···

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7

Sorry, if you asked that question, it's obvious you *don't* know grep.

···

On Fri, Sep 7, 2012 at 1:57 PM, Ferdous ara <lists@ruby-forum.com> wrote:

but i think i know about grep..
but dont know what regix to use ..

--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com

twitter: @hassan

8

here's how you can practice it: http://rubular.com

Paste the data above into the "text string" box, then try your regexp in the regexp box. It'll show what it matches live. You can then tweak the regexp until it matches everything you want.

···

On Sep 7, 2012, at 14:34 , Ferdous ara <lists@ruby-forum.com> wrote:

Sorry.. is not it better to give the solution rather then pulling some
else's Leg ???

ok (I dont know grep,Surrender)
would be able to tell me
which Grep parameter will give me output :

only /dev/cciss/c0d1p1 line by providing c0d1 ,(not cod1p1)

From here :
/dev/cciss/c0d1p1
/dev/cciss/c0d10p1
/dev/cciss/c0d11p1
/dev/cciss/c0d12p1

9

HI
thanks for the solution
problem is i am not that good in Regix.. and Currently I have very less
time to learn ..
as I am doing some project and trying to finish this quicly so i am
just asking those small bit when i dont know..
may be after i finish the projet.. i will give more time to lear n

A friendly suggestion: please learn *now*! That will save you
(and us) a lot of time. This really is most basic stuff, and
if you keep asking these kind of questions you risk that people
eventually won't help you anymore when you are in real trouble.

a simplistic solution:

1.9.3-p194 :001 > drive = 'c0d1'
  => "c0d1"
1.9.3-p194 :002 > /#{drive}p/ === '/dev/cciss/c0d1p1'
  => true
1.9.3-p194 :003 > /#{drive}p/ === '/dev/cciss/c0d11p1'
  => false

···

Am 07.09.2012 23:18, schrieb Ferdous ara:

the regix i am affer is

/dev/cciss/c0d11p1
/dev/cciss/c0d1p1

c0d1
its end with number
then Charater

p1

also problem is :
i need to provide only c0d1
i cant provide full path

--
<https://github.com/stomar/&gt;

10

Paste the data above into the "text string" box, then try your regexp in
the regexp box. It'll show what it matches live. You can then tweak the
regexp until it matches everything you want.

I been to these site before but bit confused about how it works

Under Regular expresson ,i type

c0d1
its give me 3 match ..

but i want only 1 math.. so how that site helping to build regular
expression ??
Thanks for advise.

···

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Posted via http://www.ruby-forum.com/\.

11

From: Ferdous ara <lists@ruby-forum.com>

I been to these site before but bit confused about how it works

It's your friend.

12

Writing the regexp is up to you. I'm providing you tools to get faster feedback so you can learn regexps. Also check out my quickref, it has a whole section an what can go into a regexp:

···

On Sep 7, 2012, at 15:05 , Ferdous ara <lists@ruby-forum.com> wrote:

Paste the data above into the "text string" box, then try your regexp in
the regexp box. It'll show what it matches live. You can then tweak the
regexp until it matches everything you want.

I been to these site before but bit confused about how it works

Under Regular expresson ,i type

c0d1
its give me 3 match ..

but i want only 1 math.. so how that site helping to build regular
expression ??