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Old 04-10-2006, 03:18 PM   #1
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Question how to pipe my tar file


Say I am doing a tar of a particular directory by
"tar -cf newtarfile /opt"

then newtarfile is the tar of the directory /opt.

Now instead of putting the "newtarfile" on my unix harddisk, I would like to send it to another machine simultaneously as it is taring. I do have sockets and use write to write to the other machine. My question is how do i use the output of this and use it as an input to my write function. I am using the unix "write"function.

I am invoking the tar from my code using the system command. Now i am trying to somehow redirect the output. Any ideas/help using the pipe is highly appreciated.

Old 04-10-2006, 06:51 PM   #2
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you give "-" as the filename and tar will output to standard output; for example, to tar and send it to another machine through SSH, do
tar cf - /opt | ssh user@host "cat > newtarfile"

Last edited by spooon; 04-10-2006 at 06:53 PM.
Old 04-11-2006, 11:28 AM   #3
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I already have sockets for the communication. Already a function write_sock is there which uses the unix " write (int socket, (void*)ptr, int numberofbytes);"

Now how do i tell the tar function to send it to this socket?


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