podman

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# This script is intended to be piped into by automation, in order to
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# mark output lines with timing information.  For example:
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#      /path/to/command |& awk --file timestamp.awk
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BEGIN {
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    STARTTIME=systime()
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    printf "[%s] START", strftime("%T")
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    printf " - All [+xxxx] lines that follow are relative to %s.\n", strftime("%FT%TZ", systime(), 1)
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}
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{
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    printf "[%+05ds] %s\n", systime()-STARTTIME, $0
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}
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END {
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    printf "[%s] END", strftime("%T")
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    printf " - [%+05ds] total duration since %s\n", systime()-STARTTIME, strftime("%FT%TZ", systime(), 1)
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}
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