Or maybe I just don't recognize the answer when I see it...
I'm building a schell script that will backup my systems to CD-ROM. Or DVD when I can talk my wife into a burner. :-)
I'm stuck on two items:
1) Since my tar files CAN exceed the capacity of a CD-ROM, I want to check in the script if I have to call split.
The closest I can come to determining the size of the output file from tar (e.g.ad0s1a.tgz) is: file_size=`du -k /tmp/ad0s1a.tgz`.
The problem I have is, while this gives me the result in number of K blocks, it also returns the file name and directory. I don't know how to get JUST the number of K blocks so I can do a numeric compare against 700m.
2) I have a function written that will tar/gzip the filesystem then split it into pieces that will be turned into .iso files that will be fed to burncd. I would like to capture the output of commands (e.g. ls -l /tmp/ad0s1a.*) into a "table" that I can examine to determine what was output by the split command so I know what mkisofs commands, and how many, I have to build/execute. Example: If I end up with a ad0s1a.tgz.aa, ab, and ac from split, I know I have to do mkisofs' for 3 files.
I also hope to use the same technique for determining what filesystems I have to backup in the first place. e.g. If I do a df command I want to pull out the filesystem name and what mountpoint it is on. The mountpoint is important to me because I do not want to back up some filesystems. e.g. I do not want to backup /tmp.
TIA. Cheers...
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