all: initial support for freebsd

- Use `copy_file_range(2)` over `sendfile(2)` which has wider
compatibility.
- Special case pam on freebsd and document `configDirectory`
incompatibility.
- Disable jemalloc for FreeBSD by default as it is the system allocator.
- Disable breakpad by default on FreeBSD as breakpad is not supported.

CMakeLists.txt

@@ -44,8 +44,13 @@ boption(BUILD_TESTING "Build tests (dev)" OFF)
 boption(ASAN "ASAN (dev)" OFF) # note: better output with gcc than clang
 boption(FRAME_POINTERS "Keep Frame Pointers (dev)" ${ASAN})
 
-boption(CRASH_REPORTER "Crash Handling" ON)
-boption(USE_JEMALLOC "Use jemalloc" ON)
+if (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+	boption(CRASH_REPORTER "Crash Handling" OFF)
+	boption(USE_JEMALLOC "Use jemalloc" OFF)
+else()
+	boption(CRASH_REPORTER "Crash Handling" ON)
+	boption(USE_JEMALLOC "Use jemalloc" ON)
+endif()
 boption(SOCKETS "Unix Sockets" ON)
 boption(WAYLAND "Wayland" ON)
 boption(WAYLAND_WLR_LAYERSHELL "  Wlroots Layer-Shell" ON REQUIRES WAYLAND)

changelog/next.md

@@ -21,6 +21,7 @@ set shell id.
 
 ## Other Changes
 
+- FreeBSD is now partially supported.
 - IPC operations filter available instances to the current display connection by default.
 
 ## Bug Fixes

src/core/logging.cpp

@@ -27,7 +27,7 @@
 #include <qtmetamacros.h>
 #include <qtypes.h>
 #include <sys/mman.h>
-#include <sys/sendfile.h>
+#include <unistd.h>
 
 #include "instanceinfo.hpp"
 #include "logcat.hpp"
@@ -392,7 +392,7 @@ void ThreadLogging::initFs() {
 		delete detailedFile;
 		detailedFile = nullptr;
 	} else {
-		auto lock = flock {
+		struct flock lock = {
 		    .l_type = F_WRLCK,
 		    .l_whence = SEEK_SET,
 		    .l_start = 0,
@@ -414,7 +414,7 @@ void ThreadLogging::initFs() {
 		auto* oldFile = this->file;
 		if (oldFile) {
 			oldFile->seek(0);
-			sendfile(file->handle(), oldFile->handle(), nullptr, oldFile->size());
+			copy_file_range(oldFile->handle(), nullptr, file->handle(), nullptr, oldFile->size(), 0);
 		}
 
 		this->file = file;
@@ -426,7 +426,14 @@ void ThreadLogging::initFs() {
 		auto* oldFile = this->detailedFile;
 		if (oldFile) {
 			oldFile->seek(0);
-			sendfile(detailedFile->handle(), oldFile->handle(), nullptr, oldFile->size());
+			copy_file_range(
+			    oldFile->handle(),
+			    nullptr,
+			    detailedFile->handle(),
+			    nullptr,
+			    oldFile->size(),
+			    0
+			);
 		}
 
 		crash::CrashInfo::INSTANCE.logFd = detailedFile->handle();
@@ -889,7 +896,7 @@ bool LogReader::continueReading() {
 }
 
 void LogFollower::FcntlWaitThread::run() {
-	auto lock = flock {
+	struct flock lock = {
 	    .l_type = F_RDLCK, // won't block other read locks when we take it
 	    .l_whence = SEEK_SET,
 	    .l_start = 0,

src/core/paths.cpp

@@ -361,7 +361,7 @@ void QsPaths::createLock() {
 			return;
 		}
 
-		auto lock = flock {
+		struct flock lock = {
 		    .l_type = F_WRLCK,
 		    .l_whence = SEEK_SET,
 		    .l_start = 0,
@@ -389,7 +389,7 @@ bool QsPaths::checkLock(const QString& path, InstanceLockInfo* info, bool allowD
 	auto file = QFile(QDir(path).filePath("instance.lock"));
 	if (!file.open(QFile::ReadOnly)) return false;
 
-	auto lock = flock {
+	struct flock lock = {
 	    .l_type = F_WRLCK,
 	    .l_whence = SEEK_SET,
 	    .l_start = 0,

src/core/toolsupport.cpp

@@ -54,7 +54,7 @@ bool QmlToolingSupport::lockTooling() {
 		return false;
 	}
 
-	auto lock = flock {
+	struct flock lock = {
 	    .l_type = F_WRLCK,
 	    .l_whence = SEEK_SET, // NOLINT (fcntl.h??)
 	    .l_start = 0,

src/services/pam/conversation.cpp

@@ -6,6 +6,8 @@
 #include <qsocketnotifier.h>
 #include <qstring.h>
 #include <qtmetamacros.h>
+#include <csignal>
+#include <sys/signal.h>
 #include <sys/wait.h>
 
 #include "../../core/logcat.hpp"

src/services/pam/qml.hpp

@@ -6,7 +6,11 @@
 #include <qtclasshelpermacros.h>
 #include <qthread.h>
 #include <qtmetamacros.h>
+#ifdef __FreeBSD__
+#include <security/pam_types.h>
+#else
 #include <security/_pam_types.h>
+#endif
 #include <security/pam_appl.h>
 
 #include "conversation.hpp"
@@ -35,6 +39,8 @@ class PamContext
 	///
 	/// The configuration directory is resolved relative to the current file if not an absolute path.
 	///
+	/// On FreeBSD this property is ignored as the pam configuration directory cannot be changed.
+	///
 	/// This property may not be set while @@active is true.
 	Q_PROPERTY(QString configDirectory READ configDirectory WRITE setConfigDirectory NOTIFY configDirectoryChanged);
 	/// The user to authenticate as. If unset the current user will be used.

src/services/pam/subprocess.cpp

@@ -7,7 +7,11 @@
 #include <qloggingcategory.h>
 #include <qstring.h>
 #include <sched.h>
+#ifdef __FreeBSD__
+#include <security/pam_types.h>
+#else
 #include <security/_pam_types.h>
+#endif
 #include <security/pam_appl.h>
 #include <unistd.h>
 
@@ -83,7 +87,11 @@ PamIpcExitCode PamSubprocess::exec(const char* configDir, const char* config, co
 	logIf(this->log) << "Starting pam session for user \"" << user << "\" with config \"" << config
 	                 << "\" in dir \"" << configDir << "\"" << std::endl;
 
+#ifdef __FreeBSD__
+	auto result = pam_start(config, user, &conv, &handle);
+#else
 	auto result = pam_start_confdir(config, user, &conv, configDir, &handle);
+#endif
 
 	if (result != PAM_SUCCESS) {
 		logIf(true) << "Unable to start pam conversation with error \"" << pam_strerror(handle, result)