32 lines
1.0 KiB
Bash
Executable File
32 lines
1.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright 2020 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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if [ -z "$1" ] || [ -z "$2" ]; then
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echo "usage: $0 <port> <shell-command>"
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exit 1
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fi
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# This construction allows the passed-in command ($2) to optionally read from
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# the client before responding (e.g. an HTTP request).
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CMD_TO_NC=$(mktemp -u)
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NC_TO_CMD=$(mktemp -u)
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mkfifo "$CMD_TO_NC" "$NC_TO_CMD"
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while true; do
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sh -c "$2" > "$CMD_TO_NC" 2>&1 < "$NC_TO_CMD" &
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nc -l -p "$1" -N -w1 < "$CMD_TO_NC" > "$NC_TO_CMD"
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date >> /var/log/hits
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done
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