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Check if file is locked otherwise gzip it

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# 8  
Old 03-16-2013
Ok, this is the situation before the script starts from crontab:
Code:
-rw-r--r-- 1 root root  3128771 Mar 16 20:00 tcpdump_continuous_20130316_195558.cap.gz
-rw-r--r-- 1 root root  2802194 Mar 16 20:03 tcpdump_continuous_20130316_200012.cap.gz
-rw-r--r-- 1 root root  3018276 Mar 16 20:06 tcpdump_continuous_20130316_200335.cap.gz
-rw-r--r-- 1 root root 18641426 Mar 16 20:08 tcpdump_continuous_20130316_200606.cap
-rw-r--r-- 1 root root 18049102 Mar 16 20:11 tcpdump_continuous_20130316_200824.cap
-rw-r--r-- 1 root root 13959168 Mar 16 20:14 tcpdump_continuous_20130316_201132.cap

The last bold/red file is in use by tcpdump, but the script just gzip all the file even the one in use:
Code:
-rw-r--r-- 1 root root 3018276 Mar 16 20:06 tcpdump_continuous_20130316_200335.cap.gz
-rw-r--r-- 1 root root 3015096 Mar 16 20:08 tcpdump_continuous_20130316_200606.cap.gz
-rw-r--r-- 1 root root 3067111 Mar 16 20:11 tcpdump_continuous_20130316_200824.cap.gz
-rw-r--r-- 1 root root 2566943 Mar 16 20:15 tcpdump_continuous_20130316_201132.cap.gz

And this is the debug file:
Code:
# cat log.log 
ZIP the following file: /home/user/trace/tcpdump_continuous_20130316_200606.cap
ZIP the following file: /home/user/trace/tcpdump_continuous_20130316_200824.cap
ZIP the following file: /home/user/trace/tcpdump_continuous_20130316_201132.cap

Maybe tcpdump open a new file, but I've to test it. BTW, I don't understand why the script in root crontab doesn't work! Smilie
# 9  
Old 03-16-2013
The fuser version would become something like:

Code:
for file in /home/user/trace/tcpdump*.cap
do
  if [ -z "$(fuser -- "$file" 2>/dev/null)" ]; then
    gzip "$file"
  fi
done

# 10  
Old 03-16-2013
Thanks Scrutinizer,
this works too, but as always works on command line, but gzip all files if it starts from crontab. Smilie
Last edited by Lord Spectre; 03-16-2013 at 06:41 PM..
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