25 lines
451 B
Bash
Executable File
25 lines
451 B
Bash
Executable File
#!/usr/bin/env sh
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#
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# Check for internet connectivity.
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# Returns 0 if connectivity exists, 1 if it does not.
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hasconnec=0
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for intf in /sys/class/net/*; do
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case $intf in
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"/sys/class/net/lo") break ;;
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*)
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[ "$(cat "$intf/carrier")" = 1 ] && hasconnec=1
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;;
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esac
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done
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if [ $hasconnec -ne 1 ]; then
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ping -q -w 1 -c 1 8.8.8.8 >/dev/null 2>&1 && hasconnec=1
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fi
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if [ $hasconnec -eq 1 ]; then
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exit 0
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else
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exit 1
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fi
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