InitSystem (Haiku): add support

Author: mmuman

CMakeLists.txt

@@ -1148,7 +1148,7 @@ elseif(Haiku)
         src/detection/gtk_qt/gtk.c
         src/detection/host/host_windows.c
         src/detection/icons/icons_nosupport.c
-        src/detection/initsystem/initsystem_linux.c
+        src/detection/initsystem/initsystem_haiku.cpp
         src/detection/keyboard/keyboard_nosupport.c
         src/detection/libc/libc_nosupport.c
         src/detection/lm/lm_nosupport.c

src/detection/initsystem/initsystem_haiku.cpp

@@ -0,0 +1,52 @@
+extern "C" {
+#include "initsystem.h"
+#include "common/processing.h"
+#include "util/binary.h"
+#include "util/stringUtils.h"
+};
+
+#include <AppFileInfo.h>
+#include <File.h>
+#include <libgen.h>
+#include <OS.h>
+#include <Path.h>
+#include <unistd.h>
+
+const char* ffDetectInitSystem(FFInitSystemResult* result)
+{
+    team_info teamInfo;
+    int32 cookie = 0;
+
+    // Since it runs first, registrar does not know about it,
+    // so we can't query be_roster for it.
+    BPath path("/boot/system/servers/launch_daemon");
+    if (path.InitCheck() != B_OK)
+        return NULL;
+
+    ffStrbufSetS(&result->exe, path.Path());
+    ffStrbufSetStatic(&result->name, "launch_daemon");
+
+    while (get_next_team_info(&cookie, &teamInfo) == B_OK)
+    {
+        if (strcmp(teamInfo.args, path.Path()) == 0)
+        {
+            result->pid = (int)teamInfo.team;
+            break;
+        }
+    }
+
+    BFile f(path.Path(), B_READ_ONLY);
+    if (f.InitCheck() != B_OK)
+        return NULL;
+    BAppFileInfo fileInfo(&f);
+    if (f.InitCheck() != B_OK)
+        return NULL;
+
+    version_info version;
+    if (fileInfo.GetVersionInfo(&version, B_SYSTEM_VERSION_KIND) != B_OK)
+        return NULL;
+
+    ffStrbufSetF(&result->version, "%d.%d.%d", (int)version.major, (int)version.middle, (int)version.minor);
+
+    return NULL;
+}