1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
// pkg -- the package the running program comes from, and what its package system offers for
// updates (lib/update builds on it; docs/UPDATES.md "Packages")
//
// packaged() -> Packaged Msix(full name) (GetCurrentPackageFullName), Flatpak(app id)
// (/.flatpak-info; $FLATPAK_ID), AppImage(file) ($APPIMAGE, an
// absolute path), Snap ($SNAP), else Plain
// msix_updates() -> Result<MsixUpdates, String> (Windows, in an MSIX package) the App
// Installer file the package came from (Package
// .GetAppInstallerInfo: its address) and, with one, whether it
// offers a newer version (Package.CheckUpdateAvailabilityAsync);
// WinRT through raw COM (win_winrt.rs)
// FlatpakMonitor (Linux, in a Flatpak) the portal's update monitor
// (linux_flatpak.rs): create(), poll(ms) -> UpdateAvailable,
// update(progress, cancel) -> the newest version installed
// flatpak_spawn_latest(args) (Linux) the app's newest installed version started with args
// (the portal's Spawn, LATEST_VERSION) -> its pid
// restart_appimage(args) -> i32 (Linux) the AppImage file started again with args (its
// runtime unpacks the image that is now there): 0 / -1
//
// Elsewhere (web, Android) packaged() is Plain and the rest answers "not available".
use alloc::string::String;
/// where the running program comes from
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Packaged {
/// a program file of its own: a setup, a .deb or .rpm, a portable copy
Plain,
/// an AppImage: the .AppImage file (the program runs from a copy its runtime unpacked)
AppImage(String),
/// a Flatpak: the app id (the program's folder is the read-only /app)
Flatpak(String),
/// an MSIX package: its full name (the install folder is read-only)
Msix(String),
/// a Snap (snapd updates it)
Snap,
}
/// the package the running program comes from
pub fn packaged() -> Packaged {
#[cfg(windows)]
if let Some(name) = msix::full_name() {
return Packaged::Msix(name);
}
#[cfg(target_os = "linux")]
{
let set = |v: &str| crate::env(v).filter(|x| !x.is_empty());
if crate::linux_desk::in_flatpak() || set("FLATPAK_ID").is_some() || crate::env("container").as_deref() == Some("flatpak") {
return Packaged::Flatpak(set("FLATPAK_ID").unwrap_or_default());
}
if let Some(p) = set("APPIMAGE").filter(|p| p.starts_with('/')) {
return Packaged::AppImage(p);
}
if set("SNAP").is_some() {
return Packaged::Snap;
}
}
Packaged::Plain
}
/// what App Installer knows about the running MSIX package (msix_updates)
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct MsixUpdates {
/// the address of the .appinstaller file the package was installed from ("": none -- the
/// Store, Add-AppxPackage, a developer registration)
pub appinstaller: String,
/// Package.CheckUpdateAvailabilityAsync with an .appinstaller: 0 unknown, 1 no updates,
/// 2 available, 3 required, 4 error; without one 0
pub availability: u32,
}
/// the App Installer file of the running MSIX package and whether it offers an update
/// (Windows 10 1809 and later) -> Err: not in a package, or WinRT failed (its HRESULT)
pub fn msix_updates() -> Result<MsixUpdates, String> {
#[cfg(windows)]
{
msix::updates()
}
#[cfg(not(windows))]
{
Err(String::from("no MSIX package"))
}
}
/// UpdateAvailable of the Flatpak portal: the commits of the running, the installed and the
/// remote version (an installed one newer than the running one: restart to use it)
#[derive(Clone, Debug, Default, PartialEq, Eq)]
pub struct FlatpakUpdate {
pub running: String,
pub local: String,
pub remote: String,
}
#[cfg(target_os = "linux")]
#[path = "linux_flatpak.rs"]
mod flatpak;
#[cfg(target_os = "linux")]
pub use flatpak::FlatpakMonitor;
/// (not Linux) there is no Flatpak portal: create() fails
#[cfg(not(target_os = "linux"))]
pub struct FlatpakMonitor;
#[cfg(not(target_os = "linux"))]
impl FlatpakMonitor {
pub fn create() -> Result<FlatpakMonitor, String> {
Err(String::from("no Flatpak"))
}
pub fn poll(&mut self, _ms: i32) -> Option<FlatpakUpdate> {
None
}
pub fn update(&mut self, _progress: &mut dyn FnMut(u32, u32, u32), _cancel: &dyn Fn() -> bool) -> Result<(), String> {
Err(String::from("no Flatpak"))
}
}
/// start this app's newest installed Flatpak version with args (the portal's Spawn with
/// LATEST_VERSION; the same program inside it) -> its pid
pub fn flatpak_spawn_latest(args: &[&str]) -> Result<u32, String> {
#[cfg(target_os = "linux")]
{
flatpak::spawn_latest(args)
}
#[cfg(not(target_os = "linux"))]
{
let _ = args;
Err(String::from("no Flatpak"))
}
}
/// start the running AppImage's file ($APPIMAGE) again with args: its runtime unpacks the
/// image the file holds now (after an update) and runs it -> 0, -1 when not an AppImage or no
/// process could be started
pub fn restart_appimage(args: &[&str]) -> i32 {
#[cfg(target_os = "linux")]
{
match packaged() {
Packaged::AppImage(p) => crate::spawn_file(&p, args),
_ => -1,
}
}
#[cfg(not(target_os = "linux"))]
{
let _ = args;
-1
}
}
#[cfg(windows)]
mod msix {
use alloc::format;
use alloc::string::String;
use alloc::vec::Vec;
use super::MsixUpdates;
use crate::win_winrt::{self, Guid, Obj};
#[link(name = "kernel32", kind = "raw-dylib")]
unsafe extern "system" {
fn GetCurrentPackageFullName(len: *mut u32, name: *mut u16) -> i32;
}
static IID_IPACKAGESTATICS: Guid = Guid(0x4E53_4BDF, 0x2960, 0x4878, [0x97, 0xA4, 0x96, 0x24, 0xDE, 0xB7, 0x2F, 0x2D]);
static IID_IPACKAGE6: Guid = Guid(0x8B1A_D942, 0x12D7, 0x4754, [0xAE, 0x4E, 0x63, 0x8C, 0xBC, 0x0E, 0x3A, 0x2E]);
// IPackageStatics.Current; IPackage6.GetAppInstallerInfo / CheckUpdateAvailabilityAsync;
// IAppInstallerInfo.Uri; IUriRuntimeClass.AbsoluteUri; IAsyncOperation<T>.GetResults;
// IPackageUpdateAvailabilityResult.Availability
const PS_CURRENT: usize = 6;
const P6_APPINSTALLERINFO: usize = 6;
const P6_CHECKUPDATE: usize = 7;
const AI_URI: usize = 6;
const URI_ABSOLUTE: usize = 6;
const OP_RESULTS: usize = 8;
const UR_AVAILABILITY: usize = 6;
const CHECK_MS: u32 = 60_000;
const ERROR_INSUFFICIENT_BUFFER: i32 = 122;
/// the package's full name (None: no package identity)
pub(super) fn full_name() -> Option<String> {
let mut n = 0u32;
// SAFETY: a length query without a buffer, then the name into n wide chars.
unsafe {
if GetCurrentPackageFullName(&mut n, core::ptr::null_mut()) != ERROR_INSUFFICIENT_BUFFER || n == 0 || n > 1024 {
return None;
}
let mut buf: Vec<u16> = alloc::vec![0; n as usize];
if GetCurrentPackageFullName(&mut n, buf.as_mut_ptr()) != 0 {
return None;
}
let len = buf.iter().position(|&c| c == 0).unwrap_or(buf.len());
Some(String::from_utf16_lossy(&buf[..len]))
}
}
fn hr(e: i32) -> String {
format!("WinRT: 0x{:08X}", e as u32)
}
pub(super) fn updates() -> Result<MsixUpdates, String> {
if full_name().is_none() {
return Err(String::from("no MSIX package"));
}
win_winrt::mta(|| {
let statics = win_winrt::factory("Windows.ApplicationModel.Package", &IID_IPACKAGESTATICS).map_err(hr)?;
let package = statics.get_obj(PS_CURRENT).map_err(hr)?;
// Windows 10 1809: IPackage6
let p6 = package.query(&IID_IPACKAGE6).ok_or_else(|| String::from("Package.GetAppInstallerInfo needs Windows 10 1809"))?;
let mut info = 0usize;
// SAFETY: GetAppInstallerInfo(this, out IAppInstallerInfo) (null without one).
let r = unsafe {
let f: unsafe extern "system" fn(usize, *mut usize) -> i32 = core::mem::transmute(p6.vfn(P6_APPINSTALLERINFO));
f(p6.ptr(), &mut info)
};
if r < 0 {
return Err(hr(r));
}
let Some(info) = Obj::own(info) else { return Ok(MsixUpdates { appinstaller: String::new(), availability: 0 }) };
let uri = info.get_obj(AI_URI).and_then(|u| u.get_text(URI_ABSOLUTE)).map_err(hr)?;
let op = p6.get_obj(P6_CHECKUPDATE).map_err(hr)?;
win_winrt::wait(&op, CHECK_MS).map_err(hr)?;
let result = op.get_obj(OP_RESULTS).map_err(hr)?;
let availability = result.get_i32(UR_AVAILABILITY).map_err(hr)?;
Ok(MsixUpdates { appinstaller: uri, availability: availability.clamp(0, 4) as u32 })
})
.unwrap_or_else(|| Err(String::from("no thread for WinRT")))
}
}