Fix pts dev not found in console test

Dynamically create pts devices to be used in the
TestAccLibvirtDomain_Consoles test, to ensure the
device number exists in the system.

Signed-off-by: Pablo Chacin <pchacin@suse.com>

libvirt/resource_libvirt_domain_test.go

@@ -9,7 +9,9 @@ import (
 	"os/exec"
 	"path/filepath"
 	"strings"
+	"syscall"
 	"testing"
+	"unsafe"
 
 	"github.com/hashicorp/terraform-plugin-sdk/helper/acctest"
 	"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
@@ -626,7 +628,7 @@ func TestAccLibvirtDomain_NetworkInterface(t *testing.T) {
 		Steps: []resource.TestStep{
 			{
 				Config:             config,
-				ExpectNonEmptyPlan: false, 
+				ExpectNonEmptyPlan: false,
 				Check: resource.ComposeTestCheckFunc(
 					testAccCheckLibvirtDomainExists("libvirt_domain."+randomDomainName, &domain),
 					resource.TestCheckResourceAttr(
@@ -989,24 +991,54 @@ func TestAccLibvirtDomain_Filesystems(t *testing.T) {
 	})
 }
 
+func createPts() (string, error) {
+
+	var ptsNumber int
+
+	fd, err := syscall.Open("/dev/ptmx", int(syscall.O_RDWR), 0)
+	if err != nil {
+		fmt.Printf("Error creating pts %v", err)
+	}
+
+	_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), uintptr(syscall.TIOCGPTN), uintptr(unsafe.Pointer(&ptsNumber)))
+
+	if ep != 0 {
+		return "", syscall.Errno(ep)
+	}
+
+	return fmt.Sprintf("/dev/pts/%d", ptsNumber), nil
+
+}
+
 func TestAccLibvirtDomain_Consoles(t *testing.T) {
 	skipIfPrivilegedDisabled(t)
 
 	var domain libvirt.Domain
 	randomDomainName := acctest.RandStringFromCharSet(10, acctest.CharSetAlpha)
+
+	pts1, err := createPts()
+	if err != nil {
+		t.Errorf("error creating pts %v", err)
+	}
+
+	pts2, err := createPts()
+	if err != nil {
+		t.Errorf("error creating pts %v", err)
+	}
+
 	var config = fmt.Sprintf(`
 	resource "libvirt_domain" "%s" {
 		name = "%s"
 		console {
 			type        = "pty"
 			target_port = "0"
-			source_path = "/dev/pts/1"
+			source_path = "%s"
 		}
 		console {
 			type        = "pty"
 			target_port = "0"
 			target_type = "virtio"
-			source_path = "/dev/pts/2"
+			source_path = "%s"
 		}
 		console {
 			type        = "tcp"
@@ -1015,7 +1047,7 @@ func TestAccLibvirtDomain_Consoles(t *testing.T) {
 			source_host = "127.0.1.1"
 			source_service = "cisco-sccp"
 		}
-	}`, randomDomainName, randomDomainName)
+	}`, randomDomainName, randomDomainName, pts1, pts2)
 
 	resource.Test(t, resource.TestCase{
 		PreCheck:     func() { testAccPreCheck(t) },
@@ -1031,15 +1063,15 @@ func TestAccLibvirtDomain_Consoles(t *testing.T) {
 					resource.TestCheckResourceAttr(
 						"libvirt_domain."+randomDomainName, "console.0.target_port", "0"),
 					resource.TestCheckResourceAttr(
-						"libvirt_domain."+randomDomainName, "console.0.source_path", "/dev/pts/1"),
+						"libvirt_domain."+randomDomainName, "console.0.source_path", pts1),
 					resource.TestCheckResourceAttr(
 						"libvirt_domain."+randomDomainName, "console.1.type", "pty"),
 					resource.TestCheckResourceAttr(
 						"libvirt_domain."+randomDomainName, "console.1.target_port", "0"),
 					resource.TestCheckResourceAttr(
 						"libvirt_domain."+randomDomainName, "console.1.target_type", "virtio"),
 					resource.TestCheckResourceAttr(
-						"libvirt_domain."+randomDomainName, "console.1.source_path", "/dev/pts/2"),
+						"libvirt_domain."+randomDomainName, "console.1.source_path", pts2),
 					resource.TestCheckResourceAttr(
 						"libvirt_domain."+randomDomainName, "console.2.type", "tcp"),
 					resource.TestCheckResourceAttr(