Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: While loop not reading all files if ssh fails
Top Forums Shell Programming and Scripting While loop not reading all files if ssh fails Post 302844903 by LES2013 on Tuesday 20th of August 2013 09:03:39 AM
Old 08-20-2013
Through a LOT of trial and error and researching on the net I came across the below while loop
syntax just a little while ago, the first example below. I changed my while loop to match and it
works yet I do not understand why it works. The echo of $? after each ssh “rm” failure is 1 as
it should be because the files do not exit. I am testing the error condition for when a file does not
exist. I would like to understand the reason the syntax works. The previous while loop after the
first file rm failure had control go back to the read and then the script stopped; I used “set -xv”.
It was as if the “rm” failure triggered an EOF.

Code:
while IFS= read -r f <&3;
do
     #do something with "$f"
     rm -f "$f"
done 3< delete.txt
 
while IFS= read -r FileName <&3;
do
       echo `date` '      Deleting file..............................: ' $FileName >> $AUD_DIR/app.log
 
       ssh -i $SSH_DIR/m5kdom6.adc.webserver.pri -b $SrcIP $ADCuid@$AdcIP "rm $DataDir/$FileName" > $LOG_DAY/delete.adc.bill.files.log 2>&1
 
       echo 'RC: ' $?
done 3< $LOG_DAY/bill.files.pulled.lst

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

reading from 2 files through while loop

hi i have two files cat input.txt 123456| 43256 456482|5893242 cat data.txt xv 123456 abcd dsk sd 123456 afsfn dd df 43256 asdf ff ss 456482 aa sf 5893242 ff ff aa 5893242 aa aa i need to read inputs from input.txt and find data for data.txt. then i need to print them as a... (2 Replies)
Discussion started by: windows
2 Replies

2. Shell Programming and Scripting

while loop not reading last line

hi all, i have a while loop which i am using to read lines into an array: k=0 exec 10<file while read LINE <&10; do ARRAY=$LINE ((k++)) done exec 10>&- echo ${ARRAY} for some reason when i display the array it is not showing the last row in the file. any help appreciated. (1 Reply)
Discussion started by: npatwardhan
1 Replies

3. Shell Programming and Scripting

unzip command fails in ssh

I'm trying to run a set of commands on a remote machine using ssh in a shell script. One of the commands is unzip. But when the execution reaches this command, the script fails with an error that unzip is not found. Below is the code and the error snippet. sourceDir=$1 ; filename=$3 ; destDir=$2... (4 Replies)
Discussion started by: farahzaiba
4 Replies

4. Shell Programming and Scripting

until loop fails.

i have a script like below, i am trying to print "...." until a background process that was executed before is running,, the below does work and teh loop keeps on printing "..", can someone help where i am wrong. /tmp/test/abc.sh & until do echo "..\c" done abc.sh is the scipt... (8 Replies)
Discussion started by: yesmani
8 Replies

5. Shell Programming and Scripting

Need Help with expect when ssh fails

I'm trying to write a script using expect. I'd like the script to execute several commands when the ssh succeeds and i want it to exit if the ssh fails. Does this require to define a time out for the ssh command so that if the prompt is back before this defined time the next commands are executed??... (2 Replies)
Discussion started by: Hossam_Nox
2 Replies

6. Ubuntu

Passwordless ssh authentication fails

Unable to set ssh passwordless authentication I am unable to ssh with passwordless authentication from Windows client onto UBuntu server. The ssh version on UBuntu is OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e , while SSH on Windows Client is OpenSSH_5.1p1, OpenSSL 0.9.8k. I turned on ssh... (5 Replies)
Discussion started by: tkota
5 Replies

7. Shell Programming and Scripting

Windows exe file fails when triggered from ssh

Hi, I am triggering a windows exe file using the below command. ssh user@remoteserver command.exe -option1:xx /option2:yy This command is working fine from windows command prompt. When I am triggering the same command from ssh I get the error message cant load Any ideas to deal with... (2 Replies)
Discussion started by: ahmedwaseem2000
2 Replies

8. Shell Programming and Scripting

Ssh fails due to argument position.

I have a constraint to follow organization policy. So i do not have much liberty. ssh -i /opt/nonprod user1@hostone -t bash works while ssh -i /opt/nonprod -t bash user1@hostone fails How can I get this to work when I am enforced to put -t bash before the user@hostname ? Will share debug... (3 Replies)
Discussion started by: mohtashims
3 Replies

9. Shell Programming and Scripting

Ssh fails for one of two users on the same server.

I have two users on dest_host server viz wlsadm & wasadm. From src_host server with root user I m able to passwordless login to wlsadm@dest_host however, the same fails for wasadm@dest_host Below is the debug for both first the working ssh and then the non-working ssh. Works: ... (6 Replies)
Discussion started by: mohtashims
6 Replies

10. Shell Programming and Scripting

ssh fails from one server only with expecting SSH2_MSG_KEXDH_REPLY message

I have two linux servers viz 12.7.44.18 and 12.7.45.18 I wish to ssh from both these server to a destination AiX server 12.7.33.18 The ssh works from 12.7.44.18 -> 12.7.33.18 but fails from 12.7.45.18 -> 12.7.33.18 The openssl version on both linux source 12.7.44.18 and 12.7.45.18 is the... (7 Replies)
Discussion started by: mohtashims
7 Replies

LEARN ABOUT PLAN9

break

break(1)							   User Commands							  break(1)

NAME

       break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until	loop

SYNOPSIS

   sh
       break [n]

       continue [n]

   csh
       break

       continue

   ksh
       *break [n]

       *continue [n]

DESCRIPTION

   sh
       The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.

       The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.

   csh
       The  break  utility  resumes  execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
       line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.

       The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.

   ksh
       The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified,	then  break  n	levels.  If  n	is
       greater than the number of enclosing loops, the outermost enclosing loop shall be exited.

       The  continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
       th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a  vari-
	   able  assignment.  This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera-
	   tion are not performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), exit(1), ksh(1), sh( 1), attributes(5)

SunOS 5.10							    17 Jul 2002 							  break(1)
All times are GMT -4. The time now is 02:17 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy