cpp/llvm; os.Args; build: add llvm.BinDir to PATH

internal/lib/os/proc.go

@@ -0,0 +1,65 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Process etc.
+
+package os
+
+import (
+	"runtime"
+	"unsafe"
+
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/os"
+)
+
+// Args hold the command-line arguments, starting with the program name.
+var Args []string
+
+func init() {
+	if runtime.GOOS == "windows" {
+		// TODO(xsw): check windows implementation
+		// Initialized in exec_windows.go.
+		return
+	}
+	Args = runtimeArgs(int(c.Argc), c.Argv)
+}
+
+func runtimeArgs(argc int, argv **c.Char) []string {
+	args := make([]string, argc)
+	for i := 0; i < argc; i++ {
+		arg := *c.Advance(argv, i)
+		args[i] = unsafe.String((*byte)(unsafe.Pointer(arg)), c.Strlen(arg))
+	}
+	return args
+}
+
+// Getgroups returns a list of the numeric ids of groups that the caller belongs to.
+//
+// On Windows, it returns syscall.EWINDOWS. See the os/user package
+// for a possible alternative.
+func Getgroups() ([]int, error) {
+	/* TODO(xsw):
+	gids, e := syscall.Getgroups()
+	return gids, NewSyscallError("getgroups", e)
+	*/
+	panic("todo: os.Getgroups")
+}
+
+// Exit causes the current program to exit with the given status code.
+// Conventionally, code zero indicates success, non-zero an error.
+// The program terminates immediately; deferred functions are not run.
+//
+// For portability, the status code should be in the range [0, 125].
+func Exit(code int) {
+	// Inform the runtime that os.Exit is being called. If -race is
+	// enabled, this will give race detector a chance to fail the
+	// program (racy programs do not have the right to finish
+	// successfully). If coverage is enabled, then this call will
+	// enable us to write out a coverage data file.
+	// TODO(xsw):
+	// runtime_beforeExit(code)
+
+	os.Exit(c.Int(code))
+}