Created
April 26, 2021 07:58
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| # Use it by including it directly in the unix-ruby script | |
| def run_script_once | |
| emails = %w[info@example.com] | |
| path = "#{$0}.pid" | |
| if File.exists?(path) | |
| pid = IO.read(path).to_i | |
| begin | |
| if Process.getpgid(pid) | |
| puts "Already Running!" | |
| hostname = `/bin/hostname` | |
| emails.each do |email| | |
| `/usr/bin/mail -s "WARNING: script #{path} on host #{hostname} already running" "#{email}" < /dev/null` | |
| end | |
| exit | |
| end | |
| rescue Errno::ESRCH | |
| puts "** .pid file exists, but process isn't running, continue.. **" | |
| end | |
| end | |
| at_exit { File.unlink(path) if File.exist?(path) } | |
| IO.write(path, Process.pid.to_s) | |
| end | |
| run_script_once |
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| #!/usr/bin/env ruby | |
| require "#{__dir__}/run_once" | |
| max = 12 | |
| delay = 10 | |
| 1.upto(max) do |idx| | |
| puts "#{idx}/#{max} Waiting #{delay} seconds .." | |
| sleep delay | |
| end |
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