114 lines
4.6 KiB
Diff
114 lines
4.6 KiB
Diff
From 29ec6fada935ef966e5859082435ed57daa9522d Mon Sep 17 00:00:00 2001
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From: Samuel Dionne-Riel <samuel@dionne-riel.com>
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Date: Tue, 16 Mar 2021 15:03:59 -0400
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Subject: [PATCH] [NixOS] Unwrap executable name for .desktop search
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Why is this necessary even though -a "$0" is used in the wrapper?
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Because it's completely bypassing argv0! This looks at the executable
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file in-use according to the kernel!
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Wrappers cannot affect the `/proc/.../exe` symlink!
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Co-authored-by: Yaroslav Bolyukin <iam@lach.pw>
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---
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src/nixos_utils.h | 41 +++++++++++++++++++++++++++++++++++++++++
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src/service_utils.h | 4 +++-
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src/waylandwindow.cpp | 5 ++++-
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3 files changed, 48 insertions(+), 2 deletions(-)
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create mode 100644 src/nixos_utils.h
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diff --git a/src/nixos_utils.h b/src/nixos_utils.h
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new file mode 100644
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index 0000000..726065d
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--- /dev/null
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+++ b/src/nixos_utils.h
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@@ -0,0 +1,41 @@
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+#ifndef NIXOS_UTILS_H
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+#define NIXOS_UTILS_H
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+
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+// kwin
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+// #include <kwinglobals.h>
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+
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+namespace KWin
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+{
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+
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+static QString unwrapExecutablePath(const QString &in_executablePath)
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+{
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+ // NixOS fixes many packaging issues through "wrapper" scripts that manipulates the environment or does
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+ // miscellaneous trickeries and mischievous things to make the programs work.
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+ // In turn, programs often employs different mischievous schemes and trickeries to do *other things.
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+ // It often happens that they conflict.
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+ // Here, `kwin` tries to detect the .desktop file for a given process.
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+ // `kwin` followed the process `/proc/.../exe` up to the actual binary running.
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+ // It normally would be fine, e.g. /usr/bin/foobar is what's in the desktop file.
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+ // But it's not the truth here! It's extremely likely the resolved path is /nix/store/.../bin/.foobar-wrapped
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+ // rather than what the desktop file points to, something like /nix/store/.../bin/foobar !!
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+ // Since the wrappers for Nixpkgs *always* prepend a dot and append -wrapped, we assume here that we can keep
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+ // `/^(.*)\/\.([^/]*)-wrapped/` until the (equivalent) regex does not match.
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+ // This should canonicalize the wrapper name to the expected name to look for in the desktop file.
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+
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+ // Use a copy of the const string
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+ QString executablePath(in_executablePath);
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+
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+ // While the parts needed are present, "unwrap" one layer of wrapper names.
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+ while (executablePath.endsWith("-wrapped") && executablePath[executablePath.lastIndexOf("/")+1] == QChar('.')) {
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+ // Approximately equivalent to s/-wrapped$//
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+ executablePath.remove(executablePath.length() - 8, 8);
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+ // Approximately equivalent to s;/\.;/;
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+ executablePath.remove(executablePath.lastIndexOf("/")+1, 1);
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+ }
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+
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+ return executablePath;
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+}
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+
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+}// namespace
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+
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+#endif // NIXOS_UTILS_H
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diff --git a/src/utils/serviceutils.h b/src/utils/serviceutils.h
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index 8a70c1f..475b15d 100644
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--- a/src/utils/serviceutils.h
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+++ b/src/utils/serviceutils.h
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@@ -19,6 +19,7 @@
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#include <QLoggingCategory>
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//KF
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#include <KApplicationTrader>
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+#include "nixos_utils.h"
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namespace KWin
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{
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@@ -26,8 +27,9 @@ namespace KWin
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const static QString s_waylandInterfaceName = QStringLiteral("X-KDE-Wayland-Interfaces");
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const static QString s_dbusRestrictedInterfaceName = QStringLiteral("X-KDE-DBUS-Restricted-Interfaces");
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-static QStringList fetchProcessServiceField(const QString &executablePath, const QString &fieldName)
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+static QStringList fetchProcessServiceField(const QString &in_executablePath, const QString &fieldName)
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{
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+ const QString executablePath = unwrapExecutablePath(in_executablePath);
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// needed to be able to use the logging category in a header static function
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static QLoggingCategory KWIN_UTILS ("KWIN_UTILS", QtWarningMsg);
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const auto servicesFound = KApplicationTrader::query([&executablePath] (const KService::Ptr &service) {
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diff --git a/src/waylandwindow.cpp b/src/waylandwindow.cpp
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index fd2c0c1..ae8cf96 100644
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--- a/src/waylandwindow.cpp
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+++ b/src/waylandwindow.cpp
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@@ -10,6 +10,7 @@
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#include "screens.h"
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#include "wayland_server.h"
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#include "workspace.h"
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+#include "nixos_utils.h"
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#include <KWaylandServer/display.h>
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#include <KWaylandServer/clientbuffer.h>
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@@ -173,7 +174,9 @@ void WaylandWindow::updateIcon()
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void WaylandWindow::updateResourceName()
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{
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- const QFileInfo fileInfo(surface()->client()->executablePath());
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+ const QString in_path = surface()->client()->executablePath();
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+ const QString path = unwrapExecutablePath(in_path);
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+ const QFileInfo fileInfo(path);
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if (fileInfo.exists()) {
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const QByteArray executableFileName = fileInfo.fileName().toUtf8();
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setResourceClass(executableFileName, executableFileName);
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--
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2.32.0
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