funman300
60 lines
1.7 KiB
Bash
Executable File
60 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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# enable-fingerprint.sh — wire pam_fprintd.so into sudo + gtklock auth stacks.
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# Idempotent: re-runs are no-ops once the line is present. Run with sudo.
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# Prerequisite: fprintd installed and at least one finger enrolled
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# (run `fprintd-enroll` as your user first).
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set -euo pipefail
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if [ "$EUID" -ne 0 ]; then
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echo "Run as root: sudo bash $0" >&2
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exit 1
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fi
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if ! command -v fprintd-enroll >/dev/null 2>&1; then
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echo "ERROR: fprintd is not installed. Run install.sh first." >&2
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exit 1
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fi
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PAM_LINE="auth sufficient pam_fprintd.so"
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TARGETS=(/etc/pam.d/sudo /etc/pam.d/gtklock)
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for f in "${TARGETS[@]}"; do
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if [ ! -f "$f" ]; then
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echo "ERROR: $f does not exist. Is the corresponding package installed?" >&2
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exit 1
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fi
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if grep -q "pam_fprintd" "$f"; then
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echo "$f: pam_fprintd already present — skipping"
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continue
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fi
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backup="$f.bak.$(date +%s)"
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cp -a "$f" "$backup"
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echo "$f: backed up to $backup"
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# Insert PAM_LINE on a new line directly before the first `auth ` directive.
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awk -v line="$PAM_LINE" '
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!inserted && /^auth[[:space:]]/ { print line; inserted = 1 }
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{ print }
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' "$f" > "$f.new"
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if ! grep -q "pam_fprintd" "$f.new"; then
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echo "ERROR: failed to insert PAM line into $f (no auth directive found?). Restoring backup." >&2
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rm -f "$f.new"
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exit 1
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fi
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mv "$f.new" "$f"
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chmod --reference="$backup" "$f"
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echo "$f: inserted '$PAM_LINE'"
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done
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echo
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echo "Done. Test with: sudo true (should prompt for fingerprint)"
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echo "Or lock the screen (Mod+Shift+E) and touch the reader."
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echo
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echo "To revert: restore the .bak.<ts> files in /etc/pam.d/, or:"
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echo " sudo sed -i '/pam_fprintd/d' ${TARGETS[*]}"
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