implements Pids() and Pid_exists() on freebsd.

README.rst

@@ -64,6 +64,8 @@ Current Status
   - disk_usage (linux, freebsd, windows)
   - boot_time (linux, freebsd, windows(but little broken))
   - users (linux, freebsd)
+  - pids (freebsd)
+  - pid_exists (freebsd)
 
 - not yet
 
@@ -72,11 +74,14 @@ Current Status
   - disk_io_counters
   - net_io_counters
   - net_connections
-  - pids
+  - Process class
-  - pid_exists
+
+- future work
+
   - process_iter
   - wait_procs
-  - process class
+
+
 
 License
 ------------

process.go

@@ -74,3 +74,32 @@ type Io_countersStat struct {
 	Read_bytes  int32
 	Write_bytes int32
 }
+
+func Pids() ([]int32, error) {
+	ret := make([]int32, 0)
+	procs, err := processes()
+	if err != nil {
+		return ret, nil
+	}
+
+	for _, p := range procs {
+		ret = append(ret, p.Pid)
+	}
+
+	return ret, nil
+}
+
+func Pid_exists(pid int32) (bool, error) {
+	pids, err := Pids()
+	if err != nil {
+		return false, err
+	}
+
+	for _, i := range pids {
+		if i == pid {
+			return true, err
+		}
+	}
+
+	return false, err
+}

process_test.go

@@ -1,16 +1,27 @@
 package gopsutil
 
 import (
-	"encoding/json"
-	"fmt"
 	"testing"
 )
 
-func Test(t *testing.T) {
+func Test_Pids(t *testing.T) {
-	v, err := findProcess(0)
+	ret, err := Pids()
 	if err != nil {
 		t.Errorf("error %v", err)
 	}
-	d, _ := json.Marshal(v)
+	if len(ret) == 0 {
-	fmt.Printf("%s\n", d)
+		t.Errorf("could not get pids %v", ret)
+	}
+}
+
+func Test_Pid_exists(t *testing.T) {
+	ret, err := Pid_exists(1)
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+
+	if ret == false {
+		t.Errorf("could not get init process %v", ret)
+	}
+
 }