New solution: Instead of abusing at, abuse screen. screen -d -m caffeinate -s bacula-idle-watch.sh
On Tue, Jan 15, 2019 at 11:51 AM David Brodbeck <brodb...@math.ucsb.edu> wrote: > Hmm. Unfortunately the solution below does not work on Mojave. Scripts no > longer have permission to run 'at' because they can't create > /usr/lib/cron/jobs/.lockfile. > > Adding bacula-fd to the list of apps with full disk access doesn't do > anything, unfortunately, I guess because it's not a full-fledged app? > Running 'at' manually from the command line works, but only if Terminal is > added to the list, so it seems you need an "official" app somewhere in the > process tree. (This is also a problem for backing up certain files in user > home directories, but that's another issue.) > > > On Mon, Jan 7, 2019 at 11:53 AM David Brodbeck <brodb...@math.ucsb.edu> > wrote: > >> Forgot to CC this to the list, but it's the best solution I've gotten so >> far. It works, but on macOS you have to turn the 'at' service on first. >> I ended up with this: >> >> #!/bin/bash >> >> PATH=/bin:/usr/bin:/usr/local/bin >> >> # Script to prevent system sleep while bacula is working. >> # see bacula-idle-watch.sh for details. >> >> # We need to launch with 'at' to avoid bacula-fd hanging waiting for >> script >> # completion. First we make sure atrun is enabled. >> launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist >> >> echo '/usr/bin/caffeinate -s /usr/local/bin/bacula-idle-watch.sh' | at now >> >> --- >> >> Note that by nature 'at' is not immediate. It may take a minute or so for >> the script to launch, so plan accordingly. >> >> On Sat, Jan 5, 2019 at 8:18 AM Josh Fisher <jfis...@pvct.com> wrote: >> >>> In the ClinetBeforeJob script, use the at command to schedule the launch >>> of the caffeinate job with a runtime of 'now'. For example, >>> >>> at -f caffeinate-script.sh now >>> >>> >>> On 1/4/2019 2:36 PM, David Brodbeck wrote: >>> >>> This is driving me nuts because I feel like it should be straightforward >>> and I must be missing something basic. >>> >>> I want to launch the caffeinate command on OS X before starting a job. >>> Caffeinate takes a command as an argument, then goes into the background >>> and keeps the machine awake until the command exits. I use this after >>> waking machines up using a WOL script. >>> >>> When tested from the command line, caffeinate immediately backgrounds >>> itself. However, when I try to run it as a Bacula ClientBeforeJob script, >>> bacula-fd waits around forever for caffeiniate to exit. >>> >>> Here's what I've tried so far: >>> - Having bacula run a script that then runs caffeinate. >>> - Having bacula run a script that then runs caffeinate using nohup. >>> - Having the script redirect stdin, stdout, and stderr of caffeinate to >>> /dev/null >>> - Adding an ampersand after the script in the bacula ClientBeforeJob >>> specification. >>> >>> What invariably happens is the bash process created by bacula becomes a >>> zombie and waits for caffeinate to exit. Inspecting the caffeinate process >>> with lsof shows all of the file handles are redirected to /dev/null as >>> expected, so I don't think this is a case of stdin or stdout causing >>> problems. In all cases the only way to get bacula to finish the backup is >>> to kill the script that caffeinate is running. >>> >>> I can't figure out why I can't get bacula-fd to move on after the script >>> goes into the background. When I run the script manually from the command >>> line it backgrounds immediately. >>> >>> The oddest thing is this worked fine on clients using bacula-fd version >>> 7.4.x, but fails on a client using 9.2.0. >>> >>> Here's the script bacula-fd runs, as it currently stands: >>> >>> -- >>> #!/bin/bash >>> >>> PATH=/bin:/usr/bin:/usr/local/bin >>> >>> # Script to prevent system sleep while bacula is working. >>> # see bacula-idle-watch.sh for details. >>> >>> nohup caffeinate -s bacula-idle-watch.sh 2>&1 >/dev/null </dev/null & >>> -- >>> >>> Here's the contents of bacula-idle-watch.sh; it just waits to exit until >>> there's no bacula network connection anymore. caffeinate will terminate >>> once the script exits. >>> >>> -- >>> #!/bin/sh >>> >>> # This script delays a few minutes, then loops, checking for bacula-fd >>> # connections. When there are none, it exits. >>> # This is meant to be run with caffeinate in a bacula before-job script, >>> # e.g. "caffeinate -s bacula-idle-watch.sh" >>> # This will prevent the machine from idle-sleeping until bacula finishes. >>> >>> PATH=/bin:/usr/bin:/usr/sbin >>> >>> # We put a long delay here in case it takes bacula a while to get going. >>> sleep 300 >>> >>> # Now loop while looking at the network connection. >>> # We limit checks to once every five minutes because worst-case the >>> machine >>> # just waits an extra five minutes to sleep. >>> while ( netstat -an | grep '\.9102.*ESTABLISHED' >/dev/null ) ; do >>> sleep 300 >>> done >>> >>> # Once the script exits, the wake-lock is released. >>> exit 0 >>> -- >>> >>> >>> -- >>> David Brodbeck >>> System Administrator, Department of Mathematics >>> University of California, Santa Barbara >>> >>> >>> >>> _______________________________________________ >>> Bacula-users mailing >>> listBacula-users@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/bacula-users >>> >>> >> >> -- >> David Brodbeck >> System Administrator, Department of Mathematics >> University of California, Santa Barbara >> >> > > -- > David Brodbeck > System Administrator, Department of Mathematics > University of California, Santa Barbara > > -- David Brodbeck System Administrator, Department of Mathematics University of California, Santa Barbara
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