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# 1  
Old 02-19-2014
Using finger in a loop
Hi,

I have taken all active user list and passing it to below code

Code:
for i in $(cat sample.out)
do
finger ${usr}> report.txt
done

I got below O/P
Code:
Login       Name               TTY         Idle     When     Where
de4s1     john                  console    111d   Fri 03:00
efr56      Marry                pts/105     1:32  Thu 11:07  remnjk26er3
er3v3     Scott                 pts/74       18    Thu 12:20  remnjk26er3
mki2d      Patty                 pts/102      17   Thu 12:22  remnjk26er3

But is I harcode the finger command like
Code:
for i in $(cat sample.out)
do
finger erdbn > report.txt
done

getting below O/P

Code:
Login name: erdbn                       In real life: 
Directory: /export/home/erdbn       remnjk26er3
Shell: /bin/ksh
On since Feb 20 12:30:09 on pts/4 from 1 minute 55 seconds Idle Time
Mail last read Sat Feb  1 15:25:28 2014
No Plan.

Moderator's Comments:
Mod Comment This posting was originally posted as a follow up to a related thread. A new thread was created because this is a new issue.
Last edited by Don Cragun; 02-19-2014 at 10:06 PM.. Reason: Explain creation of new thread.
# 2  
Old 02-19-2014
Quote:
Originally Posted by stew
Hi,

I have taken all active user list and passing it to below code

Code:
for i in $(cat sample.out)
do
finger ${usr}> report.txt
done

I got below O/P
Code:
Login       Name               TTY         Idle     When     Where
de4s1     john                  console    111d   Fri 03:00
efr56      Marry                pts/105     1:32  Thu 11:07  remnjk26er3
er3v3     Scott                 pts/74       18    Thu 12:20  remnjk26er3
mki2d      Patty                 pts/102      17   Thu 12:22  remnjk26er3

But is I harcode the finger command like
Code:
for i in $(cat sample.out)
do
finger erdbn > report.txt
done

getting below O/P

Code:
Login name: erdbn                       In real life: 
Directory: /export/home/erdbn       remnjk26er3
Shell: /bin/ksh
On since Feb 20 12:30:09 on pts/4 from 1 minute 55 seconds Idle Time
Mail last read Sat Feb  1 15:25:28 2014
No Plan.

Moderator's Comments:
Mod Comment This posting was originally posted as a follow up to a related thread. A new thread was created because this is a new issue.
Was usr an exported variable in the shell that invoked your script? I assume that it was not; so you effectively have a loop that runs the command:
Code:
finger > report.txt

one time for every word in the file sample.out. Each time you invoke this command, the contents of the file report.txt is overwritten. As a wild guess, I would think that the following might come closer to providing the output you were trying to produce:
Code:
> report.txt                        # Clear output file.
while read -r usr
do      finger "$usr" >> report.txt # Add finger report for the user name read from sample.out.
done < sample.out

Last edited by Don Cragun; 02-19-2014 at 10:24 PM.. Reason: Add color to show relationship between read variable name and the argument to finger.
This User Gave Thanks to Don Cragun For This Post:
stew
# 3  
Old 02-19-2014
Hi Don,

I tried the below one

Code:
while read -r `${usr}`
do
finger `${usr}`>> report.txt
done < sample.out

But still I am getting


Code:
Login       Name               TTY         Idle     When     Where
de4s1     john                  console    111d   Fri 03:00
efr56      Marry                pts/105     1:32  Thu 11:07  remnjk26er3
er3v3     Scott                 pts/74       18    Thu 12:20  remnjk26er3
mki2d      Patty                 pts/102      17   Thu 12:22  remnjk26er3

Actucally I am getting
Code:
usr

by select query, the query will retrive active users and I am passing those active users to
Code:
finger

command to list their last user id detials.
# 4  
Old 02-19-2014
Do you see any difference between:
Code:
> report.txt 
while read -r usr
do      finger "$usr" >> report.txt
done < sample.out

and:
Code:
while read -r `${usr}`
do
finger `${usr}`>> report.txt
done < sample.out

Reading into a variable name (usr) and reading into a variable named by the output of the command substitution of the expansion of a variable name (`${usr}`) are two COMPLETELY different things.

Passing the expansion of a variable name as an argument ("${usr}") and passing the output of the command substitution of the expansion of a variable name (`${usr}`) are two COMPLETELY different things.

Single quotes, back quotes, and double quotes all have meaning to the shell; and they all mean different things. Back quotes and double quotes ARE NOT INTERCHANGEABLE! Please try running the script I suggested (without changing it) and see if the results are different.

And, no, that is not what your script was doing. Your originally posted script executed the command:
Code:
finger > report.txt

once for each word in sample.out. (It sets the variable i to a different word in sample.out each time through the loop, but after setting the variable i, you never referenced it. It never set the variable usr, so the expansion of that variable ($usr) expanded to nothing.)
This User Gave Thanks to Don Cragun For This Post:
stew
# 5  
Old 02-20-2014
Hi Don,

I ran as you suggested, it is passing row by row with user id as attached below

Code:
+ read -r usr
+ finger er3sc ,
+ 1>> report.txt
+ read -r 43r34
+ finger gco45 ,
+ 1>> report.txt
+ read -r usr
+ finger 67hfr ,
+ 1>> report.txt
+ read -r usr
+ finger 56frf ,
+ 1>> report.txt
+ read -r usr
+ finger 56fj7 ,
+ 1>> report.txt
+ read -r usr
+ exit 0

but when I open the file I got

Code:
Login name: chaos ,                     In real life: ???
Login name: rfr01 ,                     In real life: ???
Login name: cke05 ,                     In real life: ???
Login name: dma83 ,                     In real life: ???
Login name: fmo01 ,                     In real life: ???
Login name: jby05 ,                     In real life: ???

---------- Post updated 02-20-14 at 12:28 AM ---------- Previous update was 02-19-14 at 11:59 PM ----------

I got it what blunder I done. Now its reading correctly. Thanks for your help.
# 6  
Old 02-20-2014
Quote:
Originally Posted by stew
Hi Don,

I ran as you suggested, it is passing row by row with user id as attached below

Code:
+ read -r usr
+ finger er3sc ,
+ 1>> report.txt
+ read -r 43r34
+ finger gco45 ,
+ 1>> report.txt
+ read -r usr
+ finger 67hfr ,
+ 1>> report.txt
+ read -r usr
+ finger 56frf ,
+ 1>> report.txt
+ read -r usr
+ finger 56fj7 ,
+ 1>> report.txt
+ read -r usr
+ exit 0

but when I open the file I got

Code:
Login name: chaos ,                     In real life: ???
Login name: rfr01 ,                     In real life: ???
Login name: cke05 ,                     In real life: ???
Login name: dma83 ,                     In real life: ???
Login name: fmo01 ,                     In real life: ???
Login name: jby05 ,                     In real life: ???

The trace output shown above does not match the contents of report.txt shown above! (The login names shown in the output do not match the arguments passed to finger in the trace.)

But, it is obvious that your input file contains data with lines in the following format:
Code:
<login-ID><space><comma>

rather than lines with the format:
Code:
<login-ID>

which was what I expected when you said you had an active user list.

Change the:
Code:
while read -r usr

in the script to:
Code:
while read -r usr junk

and then try running the script again.
This User Gave Thanks to Don Cragun For This Post:
stew
# 7  
Old 02-20-2014
Actually when I taken the active users I passes the O/P with comma
Code:
34frb,
se3r4,
34d2w,

that was the cause for the error. I corrected it. Thanks

---------- Post updated at 01:18 AM ---------- Previous update was at 01:08 AM ----------

Hi Don,

I have text file like

Code:
Login name: jro02                       In real life: ???
Login name: gco45                       In real life: ???
Login name: gma05                       In real life: ???
Login name: abe96                       In real life: Directory: /export/home/abe96           Shell: /bin/ksh
Last login Fri Feb 14 2014 11:16 on pts/56 from redbftyu45
No unread mail
No Plan.
Login name: kna51                       In real life: 
Directory: /export/home/kna51           Shell: /bin/ksh
Last login Wed Aug 7, 2013 on pts/111
No unread mail
No Plan.
Login name: 34e34                       In real life: 
Directory: /export/home/34e34           Shell: /bin/ksh
On since Feb 20 2014 12:19:08 on pts/24 from revbf43dbhtty
4 hours 5 minutes Idle Time
Login name: ttr17                       In real life: ???
Login name: van03                      In real life: ???
Login name: 4rtge                      In real life:
Directory: /export/home/4rtge           Shell: /bin/ksh
On since Feb 20 2014 11:26:13 on pts/11 from  revbf43dbhtty
33 minutes Idle Time
No unread mail

if you see above the file contains both recent active user (2014 logged on date) and last year logon date user

so I want to only take their last logon details

so I have written below command

Code:
if [grep 'Login name:' report.txt};
then 
count from Login name line till +2 (Lastlogin or Onsince) > newfile.txt
else
dont pass to newfile.txt

Here I want to know how I can increment line from Login name: then goto next two line.
 
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