Escape in systemd.timer












1















I have trouble to escape the following part of my systemd.timer



--files-from=<(ssh -p 182 web-iot.com 'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;') 


tried so far:



--files-from=\<(ssh -p 182 web-iot.com \'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;\') 


without success, i could use a shell file but i think it should be possible.



Full systemd.timer exec:



ExecStartPre=/usr/bin/rsync 
--verbose
--archive
--times
--partial
--delete
--progress
--bwlimit=7000
--rsh="ssh -p 182"
--files-from=\<(ssh -p 182 web-iot.com 'find /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;')
web-iot.com:/mnt/backups/postgresql/box/snapshots/
/var/lib/postgresql/backups/box









share|improve this question

























  • Can you provide the complete line? Including which systemd directive you're using?

    – Olorin
    Jan 24 at 8:28











  • added full comand

    – opHASnoNAME
    Jan 24 at 8:31
















1















I have trouble to escape the following part of my systemd.timer



--files-from=<(ssh -p 182 web-iot.com 'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;') 


tried so far:



--files-from=\<(ssh -p 182 web-iot.com \'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;\') 


without success, i could use a shell file but i think it should be possible.



Full systemd.timer exec:



ExecStartPre=/usr/bin/rsync 
--verbose
--archive
--times
--partial
--delete
--progress
--bwlimit=7000
--rsh="ssh -p 182"
--files-from=\<(ssh -p 182 web-iot.com 'find /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;')
web-iot.com:/mnt/backups/postgresql/box/snapshots/
/var/lib/postgresql/backups/box









share|improve this question

























  • Can you provide the complete line? Including which systemd directive you're using?

    – Olorin
    Jan 24 at 8:28











  • added full comand

    – opHASnoNAME
    Jan 24 at 8:31














1












1








1








I have trouble to escape the following part of my systemd.timer



--files-from=<(ssh -p 182 web-iot.com 'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;') 


tried so far:



--files-from=\<(ssh -p 182 web-iot.com \'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;\') 


without success, i could use a shell file but i think it should be possible.



Full systemd.timer exec:



ExecStartPre=/usr/bin/rsync 
--verbose
--archive
--times
--partial
--delete
--progress
--bwlimit=7000
--rsh="ssh -p 182"
--files-from=\<(ssh -p 182 web-iot.com 'find /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;')
web-iot.com:/mnt/backups/postgresql/box/snapshots/
/var/lib/postgresql/backups/box









share|improve this question
















I have trouble to escape the following part of my systemd.timer



--files-from=<(ssh -p 182 web-iot.com 'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;') 


tried so far:



--files-from=\<(ssh -p 182 web-iot.com \'find  /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;\') 


without success, i could use a shell file but i think it should be possible.



Full systemd.timer exec:



ExecStartPre=/usr/bin/rsync 
--verbose
--archive
--times
--partial
--delete
--progress
--bwlimit=7000
--rsh="ssh -p 182"
--files-from=\<(ssh -p 182 web-iot.com 'find /mnt/backups/postgresql/box/snapshots/ -mtime -7 -type f -exec basename {} ;')
web-iot.com:/mnt/backups/postgresql/box/snapshots/
/var/lib/postgresql/backups/box






systemd






share|improve this question















share|improve this question













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share|improve this question








edited Jan 24 at 8:31







opHASnoNAME

















asked Jan 24 at 8:22









opHASnoNAMEopHASnoNAME

1135




1135













  • Can you provide the complete line? Including which systemd directive you're using?

    – Olorin
    Jan 24 at 8:28











  • added full comand

    – opHASnoNAME
    Jan 24 at 8:31



















  • Can you provide the complete line? Including which systemd directive you're using?

    – Olorin
    Jan 24 at 8:28











  • added full comand

    – opHASnoNAME
    Jan 24 at 8:31

















Can you provide the complete line? Including which systemd directive you're using?

– Olorin
Jan 24 at 8:28





Can you provide the complete line? Including which systemd directive you're using?

– Olorin
Jan 24 at 8:28













added full comand

– opHASnoNAME
Jan 24 at 8:31





added full comand

– opHASnoNAME
Jan 24 at 8:31










1 Answer
1






active

oldest

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<( ) is process substitution, it's a special Bash syntax (also in some other shells, but not in dash). Systemd doesn't use a shell to run the command in Exec* lines, and it only does some minimal processing itself (including very specific variable expansion, templating, etc.).



So you cannot use <( ) in the ExecStartPre line directly. At the very least, you'll have to wrap it in a shell:



ExecStartPre=/bin/bash -c '/usr/bin/rsync 
--verbose
--archive
--times
--partial
...


(and escape accordingly). Then systemd will run bash, and bash will process the process substitution.



But it would be better to use a shell script here.






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    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    <( ) is process substitution, it's a special Bash syntax (also in some other shells, but not in dash). Systemd doesn't use a shell to run the command in Exec* lines, and it only does some minimal processing itself (including very specific variable expansion, templating, etc.).



    So you cannot use <( ) in the ExecStartPre line directly. At the very least, you'll have to wrap it in a shell:



    ExecStartPre=/bin/bash -c '/usr/bin/rsync 
    --verbose
    --archive
    --times
    --partial
    ...


    (and escape accordingly). Then systemd will run bash, and bash will process the process substitution.



    But it would be better to use a shell script here.






    share|improve this answer




























      2














      <( ) is process substitution, it's a special Bash syntax (also in some other shells, but not in dash). Systemd doesn't use a shell to run the command in Exec* lines, and it only does some minimal processing itself (including very specific variable expansion, templating, etc.).



      So you cannot use <( ) in the ExecStartPre line directly. At the very least, you'll have to wrap it in a shell:



      ExecStartPre=/bin/bash -c '/usr/bin/rsync 
      --verbose
      --archive
      --times
      --partial
      ...


      (and escape accordingly). Then systemd will run bash, and bash will process the process substitution.



      But it would be better to use a shell script here.






      share|improve this answer


























        2












        2








        2







        <( ) is process substitution, it's a special Bash syntax (also in some other shells, but not in dash). Systemd doesn't use a shell to run the command in Exec* lines, and it only does some minimal processing itself (including very specific variable expansion, templating, etc.).



        So you cannot use <( ) in the ExecStartPre line directly. At the very least, you'll have to wrap it in a shell:



        ExecStartPre=/bin/bash -c '/usr/bin/rsync 
        --verbose
        --archive
        --times
        --partial
        ...


        (and escape accordingly). Then systemd will run bash, and bash will process the process substitution.



        But it would be better to use a shell script here.






        share|improve this answer













        <( ) is process substitution, it's a special Bash syntax (also in some other shells, but not in dash). Systemd doesn't use a shell to run the command in Exec* lines, and it only does some minimal processing itself (including very specific variable expansion, templating, etc.).



        So you cannot use <( ) in the ExecStartPre line directly. At the very least, you'll have to wrap it in a shell:



        ExecStartPre=/bin/bash -c '/usr/bin/rsync 
        --verbose
        --archive
        --times
        --partial
        ...


        (and escape accordingly). Then systemd will run bash, and bash will process the process substitution.



        But it would be better to use a shell script here.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 24 at 8:36









        OlorinOlorin

        2,657924




        2,657924






























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