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33 lines
450 B
Bash
Executable File
33 lines
450 B
Bash
Executable File
#!/bin/sh
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#
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# Wait until a given host is down (determined by ping) then execute the
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# given command
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#
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# Usage:
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# ./when-down HOST COMMAND...
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#
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# Example
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# ./when-down 1.2.3.4 ssh 1.2.3.4
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#
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#
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# Ensure we received the correct number of arguments.
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#
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if [ $# -lt 2 ]; then
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echo "Usage: $0 HOST COMMAND..."
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exit 1
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fi
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HOST=$1
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echo "Waiting for $HOST to get down..."
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true
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while [ $? -ne 1 ]; do
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ping -c 1 -W 1 $HOST > /dev/null
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done
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shift
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"$@"
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