Initial commit

osext.go

@@ -0,0 +1,8 @@
+package osext
+
+// Returns the full path of the running executable
+// as reported by the system. Includes the executable
+// image name.
+func GetExePath() (exePath string, err error) {
+	return getExePath()
+}

osext_darwin.go

@@ -0,0 +1,8 @@
+package osext
+
+import "errors"
+
+// _NSGetExecutablePath()
+func getExePath() (exePath string, err error) {
+	return "", errors.New("Unimplemented")
+}

osext_freebsd.go

@@ -0,0 +1,7 @@
+package osext
+
+// FreeBSD: sysctl CTL_KERN KERN_PROC KERN_PROC_PATHNAME -1
+// BSD with procfs: readlink /proc/curproc/file
+func getExePath() (exePath string, err error) {
+	return os.Readlink(`/proc/curproc/file`)
+}

osext_linux.go

@@ -0,0 +1,8 @@
+package osext
+
+import "os"
+
+// readlink /proc/self/exe
+func getExePath() (exePath string, err error) {
+	return os.Readlink(`/proc/self/exe`)
+}

osext_test.go

@@ -0,0 +1,11 @@
+package osext
+
+import "testing"
+
+func TestGetExePath(t *testing.T) {
+	p, err := GetExePath()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("IMG EXE PATH: %s", p)
+}

osext_windows.go

@@ -0,0 +1,29 @@
+package osext
+
+import (
+	"unsafe"
+	"utf16"
+)
+
+var (
+	kernel = syscall.MustLoadDLL("kernel32.dll")
+	getModuleFileNameProc = kernel.MustFindProc("GetModuleFileNameW")
+)
+
+// GetModuleFileName() with hModule = NULL
+func getExePath() (exePath string, err error) {
+	return getModuleFileName()
+}
+
+func getModuleFileName() (string, error) {
+        var n uint32
+        b := make([]uint16, syscall.MAX_PATH)
+        size := uint32(len(b))
+
+        r0, _, e1 := getModuleFileNameProc.Call(0, uintptr(unsafe.Pointer(&b[0])), uintptr(size))
+        n = uint32(r0)
+        if n == 0 {
+                return "", e1
+        }
+        return string(utf16.Decode(b[0:n])), nil
+}