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https://github.com/hyzendust/freedoms4-backend-public.git
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73 lines
2.4 KiB
Bash
Executable File
73 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# /usr/local/bin/email-block
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# Block or unblock a virtual mail user by moving their entry in/out of the users file.
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# Usage: sudo /usr/local/bin/email-block <block|unblock> <username>
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ACTION="$1"
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USERNAME="$2"
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USERS_FILE="/var/dovecot/users"
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BACKUP_FILE="/var/dovecot/users.blocked"
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MAIL_ROOT="/var/vmail/${USERNAME}@freedoms4.org"
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VTRANSPORT_FILE="/etc/postfix/virtual_transport"
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ADDRESS="${USERNAME}@freedoms4.org"
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if [[ -z "$ACTION" || -z "$USERNAME" ]]; then
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echo "Usage: $0 <block|unblock> <username>" >&2
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exit 1
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fi
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if ! [[ "$USERNAME" =~ ^[a-zA-Z0-9_-]{1,32}$ ]]; then
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echo "Invalid username" >&2
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exit 2
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fi
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# Skip system users — they authenticate via PAM, not passwd-file
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if id "${USERNAME}" &>/dev/null; then
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echo "system-user"
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exit 0
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fi
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if [[ "$ACTION" == "block" ]]; then
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# Check if entry exists in users file
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if ! grep -q "^${USERNAME}:" "${USERS_FILE}" 2>/dev/null; then
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echo "not-found"
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exit 0
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fi
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# Move entry to backup file
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grep "^${USERNAME}:" "${USERS_FILE}" >> "${BACKUP_FILE}"
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sed -i "/^${USERNAME}:/d" "${USERS_FILE}"
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# Remove Postfix transport entry so new mail is no longer delivered
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if [[ -f "${VTRANSPORT_FILE}" ]]; then
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sed -i "/^${ADDRESS}[[:space:]]/d" "${VTRANSPORT_FILE}"
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postmap "${VTRANSPORT_FILE}" 2>/dev/null || true
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fi
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# Delete existing messages while keeping mailbox folders intact
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if [[ -d "${MAIL_ROOT}" ]]; then
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find "${MAIL_ROOT}" -type d \( -name cur -o -name new -o -name tmp \) -print0 |
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while IFS= read -r -d '' maildir_part; do
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find "${maildir_part}" -mindepth 1 -maxdepth 1 -type f -delete
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done
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fi
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echo "blocked"
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elif [[ "$ACTION" == "unblock" ]]; then
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# Check if entry exists in backup file
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if ! grep -q "^${USERNAME}:" "${BACKUP_FILE}" 2>/dev/null; then
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echo "not-found"
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exit 0
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fi
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# Restore entry to users file
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grep "^${USERNAME}:" "${BACKUP_FILE}" >> "${USERS_FILE}"
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sed -i "/^${USERNAME}:/d" "${BACKUP_FILE}"
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# Restore Postfix transport entry so new mail is delivered again
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if [[ -f "${VTRANSPORT_FILE}" ]] && ! grep -q "^${ADDRESS}[[:space:]]" "${VTRANSPORT_FILE}" 2>/dev/null; then
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echo "${ADDRESS} dovecot" >> "${VTRANSPORT_FILE}"
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postmap "${VTRANSPORT_FILE}" 2>/dev/null || true
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fi
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echo "unblocked"
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else
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echo "Invalid action: $ACTION" >&2
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exit 3
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fi
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