I thought I'd worked out how to ensure only 1 instance of a shell script was running (using grep and wc) but I now see that sometimes the script name appears twice in the list of processes - any ideas?
eg (apols for wrapping) when running /home/michael/bin/backup-rsync-VERI we get the below where it appears twice in the list of processes... ++ mktemp /tmp/chk_procs_XXX + TEMPFILE=/tmp/chk_procs_220 + trap 'date|mail -s "$0 error" [EMAIL PROTECTED];echo Error - aborting; exit' ERR + ps -elf + grep /home/michael/bin/backup-rsync-VERI + grep -v grep + tee /tmp/chk_procs_220 4 R michael 20219 20218 0 83 0 - 1020 - 18:18 ? 00:00:00 /bin/bash -x /home/michael/bin/backup-rsync-VERI 1 R michael 20223 20219 0 83 0 - 1020 - 18:18 ? 00:00:00 /bin/bash -x /home/michael/bin/backup-rsync-VERI ++ cat /tmp/chk_procs_220 ++ wc -l + [[ 2 -gt 1 ]] + date ++ hostname -s + mail -s 'ratty /home/michael/bin/backup-rsync-VERI - already running' [EMAIL PROTECTED] + rm /tmp/chk_procs_220 + exit -1 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
