Events

Events are actions aMule can take automatically when certain things happen. They are configured on the Events tab of the Preferences dialog, or — when running amuled — in the per-event [UserEvents/<Event>] sections of amule.conf.

Event types

Four events are supported:

Event	Trigger
Download completed	A file finishes downloading.
New chat session started	Another user initiates a chat session with you.
Out of space	aMule runs out of disk space on the partition used for temporary files.
Error on completion	aMule cannot move a completed file from the temporary directory to the incoming directory (typically caused by insufficient disk space). The Download completed command is not run for that file.

Command types

For each event you can specify two independent commands:

Type	Executed by
Core command	Any aMule flavour that has a core: amuled or the monolithic amule.
GUI command	Any aMule flavour that has a GUI: amulegui or the monolithic amule.

When running monolithic amule, both commands are executed if both are specified.

In amulegui, the Core command controls are disabled: set Core commands in the daemon's amule.conf and restart amuled. amulegui runs only two GUI commands:

• New chat session started.
• Download completed, for downloads that complete while it is connected. %FILE is empty, since the file is on the core's machine.

Out of space and Error on completion are raised only by the core.

Variables

Each event exposes a set of variables that are substituted into the command's arguments before execution:

Download completed

Variable	Value
%FILE	Full path and filename of the downloaded file.
%NAME	Filename only (without path).
%HASH	eD2k hash of the downloaded file.
%SIZE	Size in bytes.
%DLACTIVETIME	Cumulative time the download was active, formatted as hours and minutes.

New chat session started

Variable	Value
%SENDER	Username of the person initiating the chat.

Out of space

Variable	Value
%PARTITION	The path of the temporary directory whose partition is low on space.

Error on completion

Variable	Value
%FILE	Full path and filename of the file that could not be moved.

Command syntax

aMule does not run the command through a shell. The command string is split into an executable plus its arguments and executed directly, so shell features such as pipes (|), redirections (>) and operators (&&, ;) are not interpreted. To use any of those, put them inside a shell script and call the script instead.

A command is therefore either a single program with optional parameters, or the path to a script followed by optional parameters:

MyScript.sh %NAME %FILE %HASH %SIZE %DLACTIVETIME

Variables are substituted after the command is split into arguments, and each value stays inside its argument as literal data. So variables never need quotes, and a value cannot add arguments or commands. Use quotes only around fixed text with spaces, or to combine text and variables in one argument:

notify-send "aMule" "Finished %NAME (%SIZE bytes)"

An older command that relied on one variable expanding into several arguments must list those arguments itself.

Inside a shell script, the variables are received as positional parameters $1, $2, $3, etc. Quote them in the script ("$1"). The script must be in $PATH or specified with a full pathname.

aMule refuses to run a command that would put an event value where it could be executed as code:

• A variable cannot be (part of) the executable name.
• A variable cannot be the code or script name of an interpreter (sh, bash, python, perl, node, …). For inline shell code, pass the values as arguments after it: sh -c 'mv -- "$1" "/archive/$2"' _ %FILE %NAME. sh -c "mv %FILE /archive" is refused.
• Launchers such as powershell, env or busybox, and interpreters with options before the script (python -u script.py %FILE), cannot receive variables; use a script instead.
• On Windows, a value containing ", %, ! or a line break is refused for .bat/.cmd files and cmd /c; after cmd /c, name the program's extension (.exe, .bat, …) unless it is a built-in command. .exe programs receive any value.

If the program accepts --, put it before the variables so a value starting with - is not read as an option.

If a command is refused or fails to execute for any reason, the reason is logged in aMule's log file.

Examples

The scripts below are minimal, self-contained starting points. Make each one executable (chmod +x script.sh) and place it somewhere in your $PATH (or call it with a full pathname).

Linux — email on disk full

Sending an email needs a pipe, which aMule cannot run directly (see Command syntax above). Put it in a small script and set the Out of space command to:

diskFull.sh %PARTITION

#!/bin/bash
#
# diskFull.sh - sends an email when aMule runs out of disk space
# Call like this: diskFull.sh %PARTITION

echo "aMule error: $1 is full." | mail -s "aMule: out of disk space" mymail@domain.tld

Sending mail

mail (from mailutils or bsd-mailx) delivers through the local mail system. To send through an external SMTP server (Gmail, your provider, etc.) install msmtp and msmtp-mta and configure it as the system sendmail backend in ~/.msmtprc. msmtp is the maintained replacement for the older ssmtp, which is unmaintained and has been removed from current distributions.

Linux — email notification on download completed

Set the Core command for Download completed to:

doneDL.sh %NAME %FILE %HASH %SIZE %DLACTIVETIME

#!/bin/bash
#
# doneDL.sh - sends an email when an aMule download completes
# Call like this: doneDL.sh %NAME %FILE %HASH %SIZE %DLACTIVETIME
#
# Enter your email address here:
EMAIL="youremail@address.com"

name=$1
path=$2
hash=$3
size=$4
dlTime=$5

{
    echo "aMule completed this download:"
    echo
    echo "File:  $name"
    echo "Path:  $path"
    echo "Hash:  $hash"
    echo "Size:  $size bytes ($(( size / 1024 / 1024 )) MiB)"
    echo "Time:  $dlTime"
} | mail -s "aMule: $name" "$EMAIL"

Linux — desktop notification with sound

Show a desktop notification (and optionally play a sound) on the machine running aMule. These use notify-send (package libnotify-bin) and play (package sox). Install them first:

apt-get install libnotify-bin sox

Set the Core command for each event to its matching script:

# Download completed:
doneDL.sh %NAME %FILE %HASH %SIZE %DLACTIVETIME

# New chat session:
newMsg.sh %SENDER

# Out of space:
noDiskSpace.sh %PARTITION

# Error on completion:
errorDL.sh %FILE

doneDL.sh — download completed:

#!/bin/bash
#
# doneDL.sh — desktop notification on download complete
# Call like this: doneDL.sh %NAME %FILE %HASH %SIZE %DLACTIVETIME
#
# Sound file (the freedesktop sound theme is installed on most desktops):
soundPath="/usr/share/sounds/freedesktop/stereo/complete.oga"

notify-send -i amule "Download completed" \
    "File: $1
     Path: $2
     Size: $4 bytes
     Active download time: $5" \
    && play -q "$soundPath"

errorDL.sh — error on completion:

#!/bin/bash
#
# errorDL.sh — desktop notification on download error
# Call like this: errorDL.sh %FILE
#
soundPath="/usr/share/sounds/freedesktop/stereo/complete.oga"

notify-send -i amule "aMule error" \
    "Could not complete the download of: $1" \
    && play -q "$soundPath"

newMsg.sh — new chat session:

#!/bin/bash
#
# newMsg.sh — desktop notification on new chat message
# Call like this: newMsg.sh %SENDER
#
soundPath="/usr/share/sounds/freedesktop/stereo/complete.oga"

notify-send -i amule "New message" \
    "The user $1 sent you a message." \
    && play -q "$soundPath"

noDiskSpace.sh — out of space:

#!/bin/bash
#
# noDiskSpace.sh — desktop notification on disk full
# Call like this: noDiskSpace.sh %PARTITION
#
soundPath="/usr/share/sounds/freedesktop/stereo/complete.oga"

notify-send -i amule "No disk space available" \
    "The partition $1 does not have enough space to continue downloading.
     Free some space to resume." \
    && play -q "$soundPath"

suggerimento

If you don't have sox, drop the && play … part, or use paplay (PulseAudio/PipeWire) or canberra-gtk-play -i complete instead.

Windows — toast notification

Show a native Windows 10/11 toast notification when a download completes. The easiest way is the BurntToast PowerShell module. Install it once (in an elevated PowerShell):

Install-Module BurntToast -Scope CurrentUser

Save this script as e.g. C:\Scripts\notify.ps1:

param([string]$Name)
New-BurntToastNotification -Text "aMule", "Download completed: $Name"

aMule does not pass event values to powershell.exe directly, so call it from a batch file. Save this as C:\Scripts\notify.cmd, next to the script:

@echo off
powershell.exe -NoProfile -ExecutionPolicy Bypass -File "%~dp0notify.ps1" "%~1"

In Preferences → Events → Download completed, enable command execution and set the command to:

C:\Scripts\notify.cmd %NAME

File names containing ", % or ! get no notification (see Command syntax).

nota

The old net send / Windows Messenger service approach no longer works: that service was removed from Windows starting with Windows Vista. Use toast notifications (as above) on modern Windows.