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lsof ???

 
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# 1  
Old 06-21-2006
lsof ???
Hi All,

I'm having a problem with "lsof" in HP-UX system. Its giving me 2 two different results when running it.

1 . lsof -p 'PID' | wc -l -----gives some value
2 . lsof | grep 'PID' | wc -l

The above two commands gives me two different values with the same PID......

Thanks
# 2  
Old 06-21-2006
Here's the output of lsof on a Sun 5.9 system for pid 1 (init process).

HTML Code:
$ lsof 2>/dev/null |grep " 1 "
init          1     root  cwd   VDIR         256,0       2048          2 /
init          1     root  txt   VREG         256,0     919644      28367 /sbin/init
init          1     root  txt   VREG         256,0     222708    1545266 /etc/lib/ld.so.1
init          1     root  txt   VREG         256,0       3984    1545267 /etc/lib/libdl.so.1
init          1     root    0u  FIFO         256,0        0t0    1543503 /etc/initpipe
$ lsof -p 1 2>/dev/null
COMMAND PID USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
init      1 root  cwd   VDIR  256,0     2048       2 /
init      1 root  txt   VREG  256,0   919644   28367 /sbin/init
init      1 root  txt   VREG  256,0   222708 1545266 /etc/lib/ld.so.1
init      1 root  txt   VREG  256,0     3984 1545267 /etc/lib/libdl.so.1
init      1 root    0u  FIFO  256,0      0t0 1543503 /etc/initpipe
Now the difference in the wc -l for the two will come in because the second output has the header line included in it. I believe that you would be getting the 'lsof -p' output as one greater than the 'lsof |grep pid' output.
# 3  
Old 06-21-2006
Blowtorch,

Thanks for the reply.

lsof -p 'pid' | wc -l is giving me an o/p with difference of around 80 more than lsof | grep pid | wc -l.
# 4  
Old 06-22-2006
I am surprised. I tried the 'lsof -p' versus the 'lsof |grep ' combination several times, but the difference was never more than one.
Maybe you could manually check the difference between the two. Skip the '|wc -l' part and redirect the outputs to different files. Then run a diff between the files to find what the difference between the two commands is.
# 5  
Old 06-22-2006
I will try it tommorrow. I tried it on Linux "Mandriva" and it showed me a difference of one as expected.

Thanks for the reply.
Post u the result tommorow
# 6  
Old 06-22-2006
I tried redirecting the o/p two different files and diff it. It has around 280 lines in it and complaing about each line.

Any other way to do it

???
# 7  
Old 06-23-2006
What is the difference in the number of lines in the two files? I am sorry, but I cannot get more detailed as I don't have lsof that runs on HP-UX
 
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