An NZBGet post processing script that sets user, group and permissions of folders and files.

FixPermissions.sh

#!/bin/sh
################################################################################
### NZBGET POST-PROCESSING SCRIPT                                            ###
# Change user:group ownership and folder/file permission.
################################################################################
### OPTIONS                                                                  ###
# Set owner and group (yes, no).
#SetOwner=yes
# Owner user ID or username.
#User=nobody
# Owner group ID or group name.
#Group=nogroup
# Set folder and file permissions (yes, no).
#SetMode=no
# File permission mode.
#Mode=664
# Folder permission mode.
#DirMode=775
### NZBGET POST-PROCESSING SCRIPT                                            ###
################################################################################
# Exit codes
#POSTPROCESS_PARCHECK=92
#POSTPROCESS_SUCCESS=93
POSTPROCESS_ERROR=94
#POSTPROCESS_NONE=95
POSTPROCESS=95

# Check if the script is called from nzbget 11.0 or later
if [ "${NZBOP_SCRIPTDIR}" = "" ]; then
  echo "*** NZBGet post-processing script ***"
  echo "This script is supposed to be called from nzbget (11.0 or later)."
  exit ${POSTPROCESS_ERROR}
fi
# Check if directory exists
if [ -d "${NZBPP_DIRECTORY}" ]; then
  # chown
  if [ "${NZBPO_SETOWNER}" = "yes" ]; then
    if chown "${NZBPO_USER}:${NZBPO_GROUP}" -R "${NZBPP_DIRECTORY}"; then
      echo "[INFO] Ownership set to ${NZBPO_USER}:${NZBPO_GROUP}"
      POSTPROCESS=93
    else
      echo "[WARN] User and group NOT set"
      exit ${POSTPROCESS_ERROR}
    fi
  fi
  # chmod
  if [ "${NZBPO_SETMODE}" = "yes" ]; then
    # recursively set perms on files
    if find "${NZBPP_DIRECTORY}" -type f -exec chmod "${NZBPO_MODE}" '{}' ';'; then
      echo "[INFO] File permissions set to ${NZBPO_MODE}"
      POSTPROCESS=93
    else
      echo "[WARN] File permissions NOT set"
      exit ${POSTPROCESS_ERROR}
    fi
    # recursively set perms on folders
    if find "${NZBPP_DIRECTORY}" -type d -exec chmod "${NZBPO_DIRMODE}" '{}' ';'; then
      echo "[INFO] Folder permissions set to ${NZBPO_DIRMODE}"
      POSTPROCESS=93
    else
      echo "[WARN] Folder permissions NOT set"
      exit ${POSTPROCESS_ERROR}
    fi
  fi
else
  echo "[WARN] Directory not found"
  echo "[DETAIL] $NZBPP_DIRECTORY"
  exit ${POSTPROCESS}
fi

exit ${POSTPROCESS}

Adjusted to /bin/sh, adapted to newer config style.