Had a quick search around but didn't really find anything that fits my question.
I have a backup script here that's been in use long before I worked here. The main part of it is:
Code:
cd /
tar cvf /dev/rmt0.1 ./dir1 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir2 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir3 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir4 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir5 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir62>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir7 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir8 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvf /dev/rmt0.1 ./dir9 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
tar cvfX /dev/rmt0 /scripts/tar_exclude . 2>&1 | tee -a ${LOG}
if [[ $? != 0 ]] then RESULT=$?; echo "ERROR: Result code "$RESULT; fi
The script backs up dir1, dir2, dir3, dir4, dir5, dir6, dir7, dir8 and dir9. Yet these are listed in the exclude file? As is /tmp, which is not listed initially. I don't really understand what it is doing.
I guess it has something to do with the "." in red? And it is to rmt0 and not rmt0.1?
Thanks in advance,
Rab
---------- Post updated at 11:55 AM ---------- Previous update was at 09:50 AM ----------
I think I may have worked it out:
tar cvfX/dev/rmt0/scripts/tar_exclude. 2>&1
Does this mean...
Backup to rmt0 but rewind the tapeeverything in the current directoryexcept tmp, dir1, dir2, dir3, dir4, dir5, dir6, dir7, dir8 and dir9
Last edited by Scott; 08-07-2010 at 06:31 AM..
Reason: Updated title
Once upon a time, tar supported the notion of "options" followed by parameter tokens that were to be supplied in the same order as the options. In your case '/dev/rmt0' would match the f option and ./scripts/tar_exclude' would match the X option.
With GNU tar (most common these days), the command line flags are consitant with other commands and thus the -f option takes the absolutely next string and uses that as the output file, so -cvfX creates the tar archive into X and does not see the X as an option but as a file to include in the archive. Try this syntax:
Code:
tar cvf /dev/rmt0 -X /scripts/tar_exclude .
2010/08/07 11:08 EDT:
Didn't see your last bit before I posted my response. It's been a long time since I've played with real tapes, rmt0.1 probably is the device that does not do a rewaind operation after the device is closed. This keeps the tape positioned to the spot just following the previous output -- ready for the next archive file. Writing to rmt0 will rewind the tape on device close and so the tape is nicely rewound after the script is done -- and thus the last output should be /dev/rmt0 as is in your script.
Last edited by agama; 08-07-2010 at 12:11 PM..
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