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yait/tools/check_header_footer

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#!/bin/bash
# Usage: ./ensure_header_footer.sh filename
FILE="$1"
HEADER=$(cat <<'EOF'
// Copyright (C) 2025 vx_clutch ( owestness@gmail.com )
// See end of file for extended copyright information.
EOF
)
HEADER+=$'\n'
FOOTER=$(cat <<'EOF'
/* yait is yet another init tool.
* Copyright (C) 2025 vx-clutch
*
* This file is part of yait.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation or
* other materials provided with the distribution.
* 3. Neither the name of vx-clutch nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
EOF
)
if [[ -z "$FILE" ]]; then
echo "Usage: $0 <filename>"
exit 1
fi
if [[ ! -f "$FILE" ]]; then
echo "Error: File '$FILE' does not exist."
exit 1
fi
TMP_FILE="$(mktemp)"
read -r FIRST_LINE < "$FILE"
if [[ "$FIRST_LINE" != "$HEADER" ]]; then
echo "$HEADER" > "$TMP_FILE"
cat "$FILE" >> "$TMP_FILE"
mv "$TMP_FILE" "$FILE"
else
rm "$TMP_FILE"
fi
if [[ "$(tail -n 1 "$FILE")" != "$FOOTER" ]]; then
echo "$FOOTER" >> "$FILE"
fi
echo "Checked '$FILE' for header/footer."