[SOLVED] Help bash: parsing file into command

fajarpri · 04-06-2012, 01:27 AM

Hi all,
Can pls help me with this.
I have a file consisting:

Code:

user1:pass1
user2:pass2
user3:pass3

How do I create bash script to read the file and to be used with this command:
echo -e "new_password\nnew_password" | (smbpasswd -a -s $USER)

Thank you.
Fajar.

xeleema · 04-06-2012, 02:33 AM

Greetingz!
Please edit your post and wrap the 'file consisting of...' section with [code] and [/code] tags.
That way, the emotes (little faces) don't pop-up.

Example:

Quote:

This is my output
[code]
output line one
output line two
output line three
[code]
Thank you

Also, the 'command' you mention appears to be part of a script. By chance could you post the whole script (using the 'code' tags)?

colucix · 04-06-2012, 03:04 AM

Provided your input is:

Code:

user1:pass1
user2:pass2
user3:pass3

a while read loop should do the trick:

Code:

OLD_IFS="$IFS"
IFS=":"
while read user pass
do
  echo User is $user
  echo Pass is $pass
done < file
IFS="$OLD_IFS"

The Input Field Separator is changed to let the read statement accept two fields simultaneously. It is restored to the original (saved) value outside the loop.

catkin · 04-06-2012, 03:48 AM

Hi colucix

colucix's technique is good. The same can be done in less lines with

Code:

while IFS=: read user pass
do
  echo User is $user
  echo Pass is $pass
done < file

colucix · 04-06-2012, 05:16 AM

Hi catkin!

Thank you for the suggestion. Definitively more plain and effective.

fajarpri · 04-06-2012, 05:38 AM

Hi guys,
Much appreciated for the help. It works

So, the script is:

Code:

file=passlist.txt

while IFS=: read user pass
do
	echo user is $user
	echo pass is $pass
echo -e "$pass\n$pass" | (smbpasswd -s $user)
done < $file

Thank you so much,
Fajar.