Emscripten: Implement more CRT stuff

Namely:

 - Platform::OpenURI
 - Platform::DoRestart
 - Platform::ExecutableName

src/common/platform/Emscripten.cpp

@@ -17,7 +17,16 @@ namespace Platform
 {
 void OpenURI(ByteString uri)
 {
-	fprintf(stderr, "cannot open URI: not implemented\n");
+	EM_ASM({
+		open(UTF8ToString($0));
+	}, uri.c_str());
+}
+
+void DoRestart()
+{
+	EM_ASM({
+		location.reload();
+	});
 }
 
 long unsigned int GetTime()
@@ -29,7 +38,7 @@ long unsigned int GetTime()
 
 ByteString ExecutableNameFirstApprox()
 {
-	return "";
+	return "powder.wasm"; // bogus
 }
 
 bool CanUpdate()
@@ -81,6 +90,25 @@ void MaybeTriggerSyncFs()
 		});
 	}
 }
+
+ByteString ExecutableName()
+{
+	return DefaultDdir() + "/" + ExecutableNameFirstApprox(); // bogus
+}
+
+bool UpdateStart(const std::vector<char> &data)
+{
+	return false;
+}
+
+bool UpdateFinish()
+{
+	return false;
+}
+
+void UpdateCleanup()
+{
+}
 }
 
 EMSCRIPTEN_KEEPALIVE extern "C" int MainJs(int argc, char *argv[])

src/common/platform/Posix.cpp

@@ -150,72 +150,4 @@ std::vector<ByteString> DirectoryList(ByteString directory)
 	closedir(directoryHandle);
 	return directoryList;
 }
-
-ByteString ExecutableName()
-{
-	auto firstApproximation = ExecutableNameFirstApprox();
-	auto rp = std::unique_ptr<char, decltype(std::free) *>(realpath(&firstApproximation[0], NULL), std::free);
-	if (!rp)
-	{
-		std::cerr << "realpath: " << errno << std::endl;
-		return "";
-	}
-	return rp.get();
-}
-
-void DoRestart()
-{
-	ByteString exename = ExecutableName();
-	if (exename.length())
-	{
-		execl(exename.c_str(), exename.c_str(), NULL);
-		int ret = errno;
-		fprintf(stderr, "cannot restart: execl(...) failed: code %i\n", ret);
-	}
-	else
-	{
-		fprintf(stderr, "cannot restart: no executable name???\n");
-	}
-	Exit(-1);
-}
-
-bool UpdateStart(const std::vector<char> &data)
-{
-	ByteString exeName = Platform::ExecutableName();
-
-	if (!exeName.length())
-		return false;
-
-	auto updName = exeName + "-update";
-
-	if (!WriteFile(data, updName))
-	{
-		RemoveFile(updName);
-		return false;
-	}
-
-	if (chmod(updName.c_str(), 0755))
-	{
-		RemoveFile(updName);
-		return false;
-	}
-
-	if (!RenameFile(updName, exeName, true))
-	{
-		RemoveFile(updName);
-		return false;
-	}
-
-	execl(exeName.c_str(), "powder-update", NULL);
-	return false; // execl returned, we failed
-}
-
-bool UpdateFinish()
-{
-	return true;
-}
-
-void UpdateCleanup()
-{
-}
 }

src/common/platform/PosixProc.cpp

@@ -0,0 +1,79 @@
+#include "Platform.h"
+#include <iostream>
+#include <memory>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <ctime>
+#include <sys/time.h>
+#include <dirent.h>
+
+namespace Platform
+{
+void DoRestart()
+{
+	ByteString exename = ExecutableName();
+	if (exename.length())
+	{
+		execl(exename.c_str(), exename.c_str(), NULL);
+		int ret = errno;
+		fprintf(stderr, "cannot restart: execl(...) failed: code %i\n", ret);
+	}
+	else
+	{
+		fprintf(stderr, "cannot restart: no executable name???\n");
+	}
+	Exit(-1);
+}
+
+ByteString ExecutableName()
+{
+	auto firstApproximation = ExecutableNameFirstApprox();
+	auto rp = std::unique_ptr<char, decltype(std::free) *>(realpath(&firstApproximation[0], NULL), std::free);
+	if (!rp)
+	{
+		std::cerr << "realpath: " << errno << std::endl;
+		return "";
+	}
+	return rp.get();
+}
+
+bool UpdateStart(const std::vector<char> &data)
+{
+	ByteString exeName = Platform::ExecutableName();
+
+	if (!exeName.length())
+		return false;
+
+	auto updName = exeName + "-update";
+
+	if (!WriteFile(data, updName))
+	{
+		RemoveFile(updName);
+		return false;
+	}
+
+	if (chmod(updName.c_str(), 0755))
+	{
+		RemoveFile(updName);
+		return false;
+	}
+
+	if (!RenameFile(updName, exeName, true))
+	{
+		RemoveFile(updName);
+		return false;
+	}
+
+	execl(exeName.c_str(), "powder-update", NULL);
+	return false; // execl returned, we failed
+}
+
+bool UpdateFinish()
+{
+	return true;
+}
+
+void UpdateCleanup()
+{
+}
+}

src/common/platform/meson.build

@@ -21,6 +21,7 @@ elif host_platform == 'darwin'
 	common_files += files(
 		'Darwin.cpp',
 		'Posix.cpp',
+		'PosixProc.cpp',
 		'ExitCommon.cpp',
 	)
 	powder_files += files(
@@ -32,6 +33,7 @@ elif host_platform == 'android'
 	common_files += files(
 		'Android.cpp',
 		'Posix.cpp',
+		'PosixProc.cpp',
 		'ExitCommon.cpp',
 	)
 	powder_files += files(
@@ -51,6 +53,7 @@ elif host_platform == 'linux'
 	common_files += files(
 		'Linux.cpp',
 		'Posix.cpp',
+		'PosixProc.cpp',
 		'ExitCommon.cpp',
 	)
 	powder_files += files(
@@ -62,6 +65,7 @@ else
 	common_files += files(
 		'Null.cpp',
 		'Posix.cpp',
+		'PosixProc.cpp',
 		'ExitCommon.cpp',
 	)
 	powder_files += files(