runtime, syscall: fix Solaris exec tests

Also fixes a long-existing problem in the fork/exec path.

Change-Id: Idec40b1cee0cfb1625fe107db3eafdc0d71798f2
Reviewed-on: https://go-review.googlesource.com/8030Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

src/runtime/syscall2_solaris.go

@@ -22,7 +22,7 @@ import _ "unsafe" // for go:linkname
 //go:cgo_import_dynamic libc_setgroups setgroups "libc.so"
 //go:cgo_import_dynamic libc_setsid setsid "libc.so"
 //go:cgo_import_dynamic libc_setuid setuid "libc.so"
-//go:cgo_import_dynamic libc_setpgid setsid "libc.so"
+//go:cgo_import_dynamic libc_setpgid setpgid "libc.so"
 //go:cgo_import_dynamic libc_syscall syscall "libc.so"
 //go:cgo_import_dynamic libc_forkx forkx "libc.so"
 //go:cgo_import_dynamic libc_wait4 wait4 "libc.so"

src/syscall/exec_solaris_test.go

+// Copyright 2015 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.
+
+// +build solaris
+
+package syscall
+
+var (
+	procGetpgid = modlibc.NewProc("getpgid")
+	procGetpgrp = modlibc.NewProc("getpgrp")
+)
+
+func Getpgid(pid int) (pgid int, err error) {
+	r0, _, e1 := sysvicall6(procGetpgid.Addr(), 1, uintptr(pid), 0, 0, 0, 0, 0)
+	pgid = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+func Getpgrp() (pgrp int) {
+	r0, _, _ := sysvicall6(procGetpgrp.Addr(), 0, 0, 0, 0, 0, 0, 0)
+	pgrp = int(r0)
+	return
+}
+
+var Ioctl = ioctl

src/syscall/exec_unix_test.go

@@ -167,17 +167,12 @@ func TestForeground(t *testing.T) {
 
 	tty, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
 	if err != nil {
-		t.Skipf("Can't test Foreground. Couldn't open /dev/tty: %s",
-			err)
+		t.Skipf("Can't test Foreground. Couldn't open /dev/tty: %s", err)
 	}
 
 	fpgrp := 0
 
-	_, _, errno := syscall.Syscall(syscall.SYS_IOCTL,
-		tty.Fd(),
-		syscall.TIOCGPGRP,
-		uintptr(unsafe.Pointer(&fpgrp)))
-
+	errno := syscall.Ioctl(tty.Fd(), syscall.TIOCGPGRP, uintptr(unsafe.Pointer(&fpgrp)))
 	if errno != 0 {
 		t.Fatalf("TIOCGPGRP failed with error code: %s", errno)
 	}
@@ -212,11 +207,7 @@ func TestForeground(t *testing.T) {
 
 	cmd.Stop()
 
-	_, _, errno = syscall.Syscall(syscall.SYS_IOCTL,
-		tty.Fd(),
-		syscall.TIOCSPGRP,
-		uintptr(unsafe.Pointer(&fpgrp)))
-
+	errno = syscall.Ioctl(tty.Fd(), syscall.TIOCSPGRP, uintptr(unsafe.Pointer(&fpgrp)))
 	if errno != 0 {
 		t.Fatalf("TIOCSPGRP failed with error code: %s", errno)
 	}

src/syscall/export_unix_test.go

+// Copyright 2015 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package syscall
+
+func Ioctl(fd, req, arg uintptr) (err Errno) {
+	_, _, err = Syscall(SYS_IOCTL, fd, req, arg)
+	return err
+}