Add client_os for session (#149)

go.mod

@@ -1,3 +1,5 @@
 module github.com/vertica/vertica-sql-go
 
 go 1.13
+
+require github.com/elastic/go-sysinfo v1.8.1

go.sum

@@ -0,0 +1,29 @@
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+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/elastic/go-sysinfo v1.8.1 h1:4Yhj+HdV6WjbCRgGdZpPJ8lZQlXZLKDAeIkmQ/VRvi4=
+github.com/elastic/go-sysinfo v1.8.1/go.mod h1:JfllUnzoQV/JRYymbH3dO1yggI3mV2oTKSXsDHM+uIM=
+github.com/elastic/go-windows v1.0.0 h1:qLURgZFkkrYyTTkvYpsZIgf83AUsdIHfvlJaqaZ7aSY=
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+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+howett.net/plist v0.0.0-20181124034731-591f970eefbb h1:jhnBjNi9UFpfpl8YZhA9CrOqpnJdvzuiHsl/dnxl11M=
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msgs/festartupmsg.go

@@ -35,6 +35,8 @@ package msgs
 import (
 	"fmt"
 	"os/user"
+
+	"github.com/elastic/go-sysinfo"
 )
 
 // FEStartupMsg docs
@@ -46,12 +48,20 @@ type FEStartupMsg struct {
 	Database        string
 	SessionID       string
 	ClientPID       int
+	ClientOS        string
 	OSUsername      string
 }
 
 // Flatten docs
 func (m *FEStartupMsg) Flatten() ([]byte, byte) {
 
+	m.ClientOS = ""
+	host, err := sysinfo.Host()
+	if err == nil {
+		info := host.Info()
+		m.ClientOS = fmt.Sprintf("%s %s %s", info.OS.Name, info.KernelVersion, info.Architecture)
+	}
+
 	m.OSUsername = ""
 	currentUser, err := user.Current()
 	if err == nil {
@@ -79,6 +89,7 @@ func (m *FEStartupMsg) Flatten() ([]byte, byte) {
 	buf.appendLabeledString("client_version", m.DriverVersion)
 	buf.appendLabeledString("client_label", m.SessionID)
 	buf.appendLabeledString("client_pid", fmt.Sprintf("%d", m.ClientPID))
+	buf.appendLabeledString("client_os", m.ClientOS)
 	buf.appendLabeledString("client_os_user_name", m.OSUsername)
 	buf.appendBytes([]byte{0})
 
@@ -87,13 +98,14 @@ func (m *FEStartupMsg) Flatten() ([]byte, byte) {
 
 func (m *FEStartupMsg) String() string {
 	return fmt.Sprintf(
-		"Startup (packet): ProtocolVersion:%08X, DriverName='%s', DriverVersion='%s', UserName='%s', Database='%s', SessionID='%s', ClientPID=%d, ClientOSUserName='%s'",
+		"Startup (packet): ProtocolVersion:%08X, DriverName='%s', DriverVersion='%s', UserName='%s', Database='%s', SessionID='%s', ClientPID=%d, ClientOS='%s', ClientOSUserName='%s'",
 		m.ProtocolVersion,
 		m.DriverName,
 		m.DriverVersion,
 		m.Username,
 		m.Database,
 		m.SessionID,
 		m.ClientPID,
+		m.ClientOS,
 		m.OSUsername)
 }