Getrusage for linux.

R=rsc
APPROVED=rsc
DELTA=40  (38 added, 0 deleted, 2 changed)
OCL=29351
CL=29422

src/lib/syscall/Makefile

@@ -3,7 +3,7 @@
 # license that can be found in the LICENSE file.
 
 # DO NOT EDIT.  Automatically generated by gobuild.
-# gobuild -m errstr_${GOOS}.go file_${GOOS}.go socket_${GOOS}.go syscall_${GOARCH}_${GOOS}.go time_${GOARCH}_${GOOS}.go types_${GOARCH}_${GOOS}.go asm_${GOARCH}_${GOOS}.s syscall.go signal_${GOARCH}_${GOOS}.go exec.go >Makefile
+# gobuild -m errstr_${GOOS}.go file_${GOOS}.go socket_${GOOS}.go syscall_${GOARCH}_${GOOS}.go time_${GOARCH}_${GOOS}.go types_${GOARCH}_${GOOS}.go asm_${GOARCH}_${GOOS}.s syscall.go signal_${GOARCH}_${GOOS}.go exec.go proc_${GOOS}.go >Makefile
 
 D=
 
@@ -51,6 +51,7 @@ O2=\
 
 O3=\
 	file_$(GOOS).$O\
+	proc_$(GOOS).$O\
 	socket_$(GOOS).$O\
 	time_$(GOARCH)_$(GOOS).$O\
 
@@ -70,7 +71,7 @@ a2: $(O2)
 	rm -f $(O2)
 
 a3: $(O3)
-	$(AR) grc _obj$D/syscall.a file_$(GOOS).$O socket_$(GOOS).$O time_$(GOARCH)_$(GOOS).$O
+	$(AR) grc _obj$D/syscall.a file_$(GOOS).$O proc_$(GOOS).$O socket_$(GOOS).$O time_$(GOARCH)_$(GOOS).$O
 	rm -f $(O3)
 
 a4: $(O4)

src/lib/syscall/proc_darwin.go

+// 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.
+
+package syscall
+
+// Process operations for Darwin
+// TODO:
+// - getrusage
+// - getrlimit, setrlimit
+
+import (
+	"syscall";
+	"unsafe";
+)

src/lib/syscall/proc_linux.go

+// 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.
+
+package syscall
+
+// Process operations for Linux
+// TODO:
+// - getrlimit, setrlimit
+
+import (
+	"syscall";
+	"unsafe";
+)
+
+func Getrusage(who int64, usage *Rusage) (ret, errno int64) {
+	r1, r2, err := Syscall(SYS_GETRUSAGE, who, int64(uintptr(unsafe.Pointer(usage))), 0);
+	return r1, err
+}

src/lib/syscall/types_amd64_linux.go

@@ -28,6 +28,11 @@ type Timeval struct {
 
 // Processes
 
+const (
+	RUSAGE_SELF = 0;
+	RUSAGE_CHILDREN = -1;
+)
+
 type Rusage struct {
 	Utime	Timeval;
 	Stime	Timeval;