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Refresh Xauth patch from upstream PR

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minor .spec cosmetics
epel9
Rex Dieter 4 years ago
parent 0d68a0fd96
commit 771759b219
2 changed files with 95 additions and 72 deletions
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158
0001-Redesign-Xauth-handling.patch
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@ -1,4 +1,4 @@
From fbdf20d59d1c63cd2b8fd78efb3125478a2ea07c Mon Sep 17 00:00:00 2001
From 592ad41960589ea537c3641e39b8947d77389026 Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fabian@ritter-vogt.de>
Date: Wed, 21 Aug 2019 16:32:03 +0200
Subject: [PATCH] Redesign Xauth handling
@ -9,15 +9,10 @@ and easier to read. However, we lose the ability to merge the new cookie into
an existing Xauthority file, so support for using a non-temporary file is
dropped. Even if merging was implemented manually, use of FamilyWild would
"infect" such a file and break it for DMs which don't write it.
Unfortunately, a hack in UserSession is required to get XAUTHORITY into
the process environment. The Xauthority file has to be created as the target
user, but that's only possible in setupChildProcess(). In there, changes to
processEnvironment() to set XAUTHORITY to the generated path are not effective,
so configure the process to inherit the environment instead and use qputenv.
---
CMakeLists.txt | 3 ++
data/man/sddm.conf.rst.in | 8 ----
data/man/sddm.rst.in | 4 ++
src/auth/Auth.cpp | 6 +--
src/auth/Auth.h | 6 +--
src/common/Configuration.h | 2 -
@ -30,9 +25,9 @@ so configure the process to inherit the environment instead and use qputenv.
src/helper/CMakeLists.txt | 8 +++-
src/helper/HelperApp.cpp | 4 +-
src/helper/HelperApp.h | 4 +-
src/helper/UserSession.cpp | 53 +++++++++++----------
src/helper/UserSession.h | 9 ++++
16 files changed, 165 insertions(+), 95 deletions(-)
src/helper/UserSession.cpp | 67 +++++++++++++-------------
src/helper/UserSession.h | 2 +
17 files changed, 166 insertions(+), 105 deletions(-)
create mode 100644 src/common/XauthUtils.cpp
create mode 100644 src/common/XauthUtils.h
@ -76,6 +71,21 @@ index bee0768..e91280a 100644
`DisplayCommand=`
Path of script to execute when starting the display server.
Default value is "@DATA_INSTALL_DIR@/scripts/Xsetup".
diff --git a/data/man/sddm.rst.in b/data/man/sddm.rst.in
index 6403368..a542e3b 100644
--- a/data/man/sddm.rst.in
+++ b/data/man/sddm.rst.in
@@ -34,6 +34,10 @@ Distributions without pam and systemd will need to put the **sddm** user
into the **video** group, otherwise errors regarding GL and drm devices
might be experienced.
+For X11 sessions, the cookie for X authorization is written into a
+temporary file inside @RUNTIME_DIR@, owned and only accessible by the
+user.
+
OPTIONS
=======
diff --git a/src/auth/Auth.cpp b/src/auth/Auth.cpp
index caca314..c2228ae 100644
--- a/src/auth/Auth.cpp
@ -497,10 +507,14 @@ index 3742df1..d417494 100644
/*!
\brief Write utmp/wtmp/btmp records when a user logs in
diff --git a/src/helper/UserSession.cpp b/src/helper/UserSession.cpp
index c9a8a20..e55e69e 100644
index c9a8a20..4096edc 100644
--- a/src/helper/UserSession.cpp
+++ b/src/helper/UserSession.cpp
@@ -23,6 +23,7 @@
@@ -20,9 +20,11 @@
*/
#include "Configuration.h"
+#include "Constants.h"
#include "UserSession.h"
#include "HelperApp.h"
#include "VirtualTerminal.h"
@ -508,30 +522,63 @@ index c9a8a20..e55e69e 100644
#include <sys/types.h>
#include <sys/ioctl.h>
@@ -35,6 +36,8 @@
#include <fcntl.h>
#include <sched.h>
@@ -45,11 +47,35 @@ namespace SDDM {
}
+#include <QStandardPaths>
bool UserSession::start() {
- QProcessEnvironment env = qobject_cast<HelperApp*>(parent())->session()->processEnvironment();
+ QProcessEnvironment env = processEnvironment();
if (env.value(QStringLiteral("XDG_SESSION_CLASS")) == QLatin1String("greeter")) {
QProcess::start(m_path);
} else if (env.value(QStringLiteral("XDG_SESSION_TYPE")) == QLatin1String("x11")) {
+ // Create the Xauthority file
+ QByteArray cookie = qobject_cast<HelperApp*>(parent())->cookie();
+ if (cookie.isEmpty())
+ return false;
+
namespace SDDM {
UserSession::UserSession(HelperApp *parent)
: QProcess(parent) {
@@ -260,38 +263,38 @@ namespace SDDM {
qWarning() << "Could not redirect stdout";
}
+ // Drop the current environment
+ for (QString key : QProcessEnvironment::systemEnvironment().keys())
+ qunsetenv(qPrintable(key));
+ m_xauthFile.setFileTemplate(QStringLiteral(RUNTIME_DIR "/xauth_XXXXXX"));
+
+ // Apply the new one. This has the nice effect that XDG_RUNTIME_DIR etc are effective
+ for (QString key : processEnvironment().keys())
+ qputenv(qPrintable(key), processEnvironment().value(key).toLocal8Bit());
+ if (!m_xauthFile.open()) {
+ qCritical() << "Could not create the Xauthority file";
+ return false;
+ }
+
// set X authority for X11 sessions only
if (sessionType != QLatin1String("x11"))
return;
+ QString display = processEnvironment().value(QStringLiteral("DISPLAY"));
+ qDebug() << "Adding cookie to" << m_xauthFile.fileName();
+
+ if (!Xauth::writeCookieToFile(m_xauthFile.fileName(), display, cookie)) {
+ qCritical() << "Failed to write the Xauthority file";
+ m_xauthFile.close();
+ return false;
+ }
+
+ env.insert(QStringLiteral("XAUTHORITY"), m_xauthFile.fileName());
+ setProcessEnvironment(env);
+
const QString cmd = QStringLiteral("%1 \"%2\"").arg(mainConfig.X11.SessionCommand.get()).arg(m_path);
qInfo() << "Starting:" << cmd;
QProcess::start(cmd);
@@ -155,6 +181,11 @@ namespace SDDM {
exit(Auth::HELPER_OTHER_ERROR);
}
+ const int xauthHandle = m_xauthFile.handle();
+ if (xauthHandle != -1 && fchown(xauthHandle, pw.pw_uid, pw.pw_gid) != 0) {
+ qCritical() << "fchown failed for" << m_xauthFile.fileName();
+ exit(Auth::HELPER_OTHER_ERROR);
+ }
#ifdef USE_PAM
// fetch ambient groups from PAM's environment;
@@ -259,40 +290,6 @@ namespace SDDM {
} else {
qWarning() << "Could not redirect stdout";
}
-
- // set X authority for X11 sessions only
- if (sessionType != QLatin1String("x11"))
- return;
- QString cookie = qobject_cast<HelperApp*>(parent())->cookie();
- if (!cookie.isEmpty()) {
- QString file = processEnvironment().value(QStringLiteral("XAUTHORITY"));
@ -542,47 +589,31 @@ index c9a8a20..e55e69e 100644
- // create the path
- QFileInfo finfo(file);
- QDir().mkpath(finfo.absolutePath());
-
- QFile file_handler(file);
- file_handler.open(QIODevice::Append);
- file_handler.close();
-
- QString cmd = QStringLiteral("%1 -f %2 -q").arg(mainConfig.X11.XauthPath.get()).arg(file);
+ QByteArray cookie = qobject_cast<HelperApp*>(parent())->cookie();
+ if (cookie.isEmpty())
+ return;
-
- // execute xauth
- FILE *fp = popen(qPrintable(cmd), "w");
+ QString dir = QStandardPaths::writableLocation(QStandardPaths::RuntimeLocation);
+ if (!dir.isEmpty()) {
+ m_xauthFile.setFileTemplate(dir + QStringLiteral("/xauth_XXXXXX"));
+ m_xauthFile.open();
+ }
-
- // check file
- if (!fp)
- return;
- fprintf(fp, "remove %s\n", qPrintable(display));
- fprintf(fp, "add %s . %s\n", qPrintable(display), qPrintable(cookie));
- fprintf(fp, "exit\n");
+ if (m_xauthFile.fileName().isEmpty())
+ qWarning() << "Could not create the Xauthority file";
+ else {
+ QString display = processEnvironment().value(QStringLiteral("DISPLAY"));
+ qDebug() << "Adding cookie to" << m_xauthFile.fileName();
-
- // close pipe
- pclose(fp);
+ if (!Xauth::writeCookieToFile(m_xauthFile.fileName(), display, cookie))
+ qWarning() << "Failed to write the Xauthority file";
+ else
+ qputenv("XAUTHORITY", m_xauthFile.fileName().toUtf8());
}
- }
}
void UserSession::setCachedProcessId(qint64 pid) {
diff --git a/src/helper/UserSession.h b/src/helper/UserSession.h
index 7069084..23776f4 100644
index 7069084..0ae627d 100644
--- a/src/helper/UserSession.h
+++ b/src/helper/UserSession.h
@@ -25,6 +25,7 @@
@ -593,27 +624,14 @@ index 7069084..23776f4 100644
namespace SDDM {
class HelperApp;
@@ -53,12 +54,20 @@ namespace SDDM {
*/
qint64 cachedProcessId();
+ /* Hack! QProcess does not allow changing processEnvironment by
+ setupChildProcess(), but this is needed for creating XAUTHORITY.
+ So inherit the caller's environment and apply the assignments manually. */
+ QProcessEnvironment processEnvironment() { return m_processEnv; }
+ void setProcessEnvironment(QProcessEnvironment env) { m_processEnv = env; }
+
protected:
void setupChildProcess();
@@ -59,6 +60,7 @@ namespace SDDM {
private:
QString m_path { };
qint64 m_cachedProcessId;
+ QProcessEnvironment m_processEnv;
+ QTemporaryFile m_xauthFile;
};
}
--
2.25.1
2.29.2

9
sddm.spec
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@ -9,7 +9,7 @@
Name: sddm
Version: 0.19.0
Release: 3%{?dist}
Release: 4%{?dist}
License: GPLv2+
Summary: QML based X11 desktop manager
@ -116,12 +116,13 @@ ls -sh src/greeter/theme/background.png
%build
%{cmake} \
%cmake \
-DBUILD_MAN_PAGES:BOOL=ON \
-DCMAKE_BUILD_TYPE:STRING="Release" \
-DENABLE_JOURNALD:BOOL=ON \
-DSESSION_COMMAND:PATH=/etc/X11/xinit/Xsession \
-DWAYLAND_SESSION_COMMAND:PATH=/etc/sddm/wayland-session
%cmake_build
@ -222,6 +223,10 @@ fi
%changelog
* Tue Jan 26 2021 Rex Dieter <rdieter@fedoraproject.org> - 0.19.0-4
- Refresh Xauth patch from upstream PR
- minor .spec cosmetics
* Fri Jan 22 2021 Neal Gompa <ngompa13@gmail.com> - 0.19.0-3
- Adjust sddm state file trigger for plasma-workspace 5.20.90-2

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