On 25.5.2010 14:57, Jatin Davey wrote:

On 5/25/2010 6:20 PM, Jakub Jedelsky wrote:

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On 25.5.2010 14:27, Jatin Davey wrote:

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Hi

I have a linux box which has CentOS running in it. I logged into the box using root and wrote a script in the /home/proc_threads directory. saved the file and quit. I changed the file permissions such that any user could execute it using the "chmod 777 filename" command.

When i log out and log in as a non-root user i was not able to execute the script though.

Could some one please help in this regard. I am a newbie to linux.

Thanks Jatin _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Hi,

have another users access to /home/proc_threads directory? :) Don't you call any functions from script which can be executed only by root..? Send us the exact error which you get after execute your script as an user.. If it is a bash script, you can debug it with "-x" option..

Excuse my english :)

Jakub J.

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CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount > /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

Thanks Jatin

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CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

...and what are permissions of /home/proc_threads/tempfile? It seems, that users can't write to it.. Try 'chmod o+w /home/proc_threads/tempfile'

Jatin Davey wrote:

Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount > /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

The script is running, but the 'awk' line is failing to read /home/proc_threads/tempfile. What are the permissions on that file and directory?

$ ls -ld /home/proc_threads

$ ls -l /home/proc_threads/tempfile

On Tue, May 25, 2010 at 8:27 AM, Jatin Davey jashokda@cisco.com wrote:

On 5/25/2010 6:44 PM, Bowie Bailey wrote:

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Jatin Davey wrote:

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Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount> /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

The script is running, but the 'awk' line is failing to read /home/proc_threads/tempfile. What are the permissions on that file and directory?

 $ ls -ld /home/proc_threads

 $ ls -l /home/proc_threads/tempfile

Thanks all

I finally figured out that the tempfile that i was creating did not have proper permissions for the script to write into. Now i have fixed it using the chmod command and it is working fine.

If more than one other user executes this script at the same time, tempfile may be overwritten by the second before the first can run the awk line. Change this to use a pipe.

On 25 May 2010 14:14, Bowie Bailey Bowie_Bailey@buc.com wrote:

Jatin Davey wrote:

...

Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount > /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

The script is running, but the 'awk' line is failing to read /home/proc_threads/tempfile.  What are the permissions on that file and directory?

$ ls -ld /home/proc_threads

$ ls -l /home/proc_threads/tempfile

-- Bowie _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Looks like it is failing before the awk...

For that script to run the directory will need to be writeable by the user running the script...

chmod o+w /home/proc_threads will do if you don't care for security of the file/directory... or arrange the group of the user running the script to be able to write to the directory instead.

James

On Tue, May 25, 2010 at 9:42 AM, Les Mikesell lesmikesell@gmail.com wrote:

Bowie Bailey wrote:

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Jatin Davey wrote:

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Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount > /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

The script is running, but the 'awk' line is failing to read /home/proc_threads/tempfile.  What are the permissions on that file and directory?

$ ls -ld /home/proc_threads

$ ls -l /home/proc_threads/tempfile

Unless you have some other use for the contents of tempfile, you could use a pipeline instead to avoid any permissions issue.

If you don't mind, I would like to see the pipeline equivalent. :)

I used an array in a similar situation, (to avoid creating tmp file) but maybe that does not scale? For this case, maybe something like this? ...

#!/bin/sh OLD=$IFS IFS=$'\n' R_PS=($(ps -C java -o thcount)) IFS=$OLD # R_PS is now an array, each element is one line of the ps output

for (( i = 0; i < ${#R_PS[@]}; i++ )) ; do # Sum the desired arguments done echo $total

-Bob

Bowie wrote:

Bob Beers wrote:

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On Tue, May 25, 2010 at 9:42 AM, Les Mikesell lesmikesell@gmail.com wrote:

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Bowie Bailey wrote:

...

Jatin Davey wrote:

...

Here is the script that i am trying to execute as a non-root user:

#!/bin/sh ps -C java -o thcount > /home/proc_threads/tempfile awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile

here is the output when i try to execute as a non-root user:

./javathreads: line 2: /home/proc_threads/tempfile: Permission denied awk: cmd. line:1: fatal: cannot open file `/home/proc_threads/tempfile' for reading (Permission denied)

The script is running, but the 'awk' line is failing to read /home/proc_threads/tempfile. What are the permissions on that file and directory?

$ ls -ld /home/proc_threads
$ ls -l /home/proc_threads/tempfile

Unless you have some other use for the contents of tempfile, you could use a pipeline instead to avoid any permissions issue.

If you don't mind, I would like to see the pipeline equivalent. :)

ps -C java -o thcount | awk ' { total += $1 } END { print total } '

Now, as dearly as I love awk, ps -C java --no-heading | wc -l

mark

m.roth@5-cent.us wrote:

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Bowie wrote:

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ps -C java -o thcount | awk ' { total += $1 } END { print total } '

Now, as dearly as I love awk, ps -C java --no-heading | wc -l

You are counting processes, the original is counting threads.

$ ps -C java -o thcount | awk ' { total += $1 } END { print total } ' 29

$ ps -C java --no-heading | wc -l 1

So? $ ps -C java -o thcount --no-heading | wc -l

mark "shorter is us"

On 5/25/2010 9:55 AM, m.roth@5-cent.us wrote:

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m.roth@5-cent.us wrote:

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Bowie wrote:

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ps -C java -o thcount | awk ' { total += $1 } END { print total } '

Now, as dearly as I love awk, ps -C java --no-heading | wc -l

You are counting processes, the original is counting threads.

$ ps -C java -o thcount | awk ' { total += $1 } END { print total } ' 29

$ ps -C java --no-heading | wc -l 1

Oh, I take that back - I see what's going on, a and yeah, you're right.

How about: ps H -C java |wc -l

Les wrote:

On 5/25/2010 9:55 AM, m.roth@5-cent.us wrote:

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m.roth@5-cent.us wrote:

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Bowie wrote:

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ps -C java -o thcount | awk ' { total += $1 } END { print total } '

Now, as dearly as I love awk, ps -C java --no-heading | wc -l

You are counting processes, the original is counting threads.

$ ps -C java -o thcount | awk ' { total += $1 } END { print total } ' 29

$ ps -C java --no-heading | wc -l 1

Oh, I take that back - I see what's going on, a and yeah, you're right.

How about: ps H -C java |wc -l

No joy. On one of our servers, if I do that, I show three processes, but if I use the thread count flag, I get THCNT 63 59 62 and the original poster wanted the total threadcount.

mark