Add 1cm margins left and right to every page of a PDF using pdflatex directly

pdfmargins

for INPUT_PDF_FILE in "$@"; do
    if [ "$(file -b --mime-type "$INPUT_PDF_FILE")" == "application/pdf" ]; then
        OUTPUT_PDF_FILE="${INPUT_PDF_FILE%.pdf}.margins"
        pdflatex -jobname "$OUTPUT_PDF_FILE" "\documentclass{article}\usepackage{pdfpages}\begin{document}\includepdf[pages=-,trim=1cm 0cm 1cm 0cm]{$INPUT_PDF_FILE}\end{document}"
    else
        echo "Skipping non-PDF file: $INPUT_PDF_FILE"
    fi
done

pdfmargins.single.sh

INPUT_PDF_FILE="$1" OUTPUT_PDF_FILE="${INPUT_PDF_FILE%.pdf}.margins"; pdflatex -jobname "$OUTPUT_PDF_FILE" "\documentclass{article}\usepackage{pdfpages}\begin{document}\includepdf[pages=-,trim=1cm 0cm 1cm 0cm]{$INPUT_PDF_FILE}\end{document}