有没有在bash中命名“私有函数”的约定？

# __umount_loop awk_program fstab_file first_msg retry_msg umount_args
# awk_program should process fstab_file and return a list of fstab-encoded
# paths; it doesn't have to handle comments in fstab_file.
__umount_loop() {
    # ...
}

# Similar to __umount loop above,specialized for loopback devices
__umount_loopback_loop() {
    # ...
}

# __proc_pids {program} [pidfile]
# Set $pid to pids from /var/run* for {program}.  $pid should be declared
# local in the caller.
# Returns LSB exit code for the 'status' action.
__pids_var_run() {
    # ...
}

# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/(~|.bak|.orig|.rpmnew|.rpmorig|.rpmsave)$/d'