Uid & gid resolution, oneline, noresolve

libbsm.go

@@ -1,15 +1,30 @@
 // This is an implementation of libbsm
 // Copyright johan@nosd.in 2021
 //
+// +build freebsd
+//
+// Use libc to get pw name from uid
+
 package main
 
+/*
+#cgo CFLAGS: -I /usr/lib
+#cgo LDFLAGS: -L. -lc
+#include <sys/types.h>
+#include <stdlib.h>
+#include <utmpx.h>
+#include <grp.h>
+#include <pwd.h>
+*/
+import "C"
+
 import (
 	"io"
 	"os"
 	"fmt"
-//	"net"
 	"time"
 	"bytes"
+	"strconv"
 	"encoding/binary"
 )
 
@@ -96,6 +111,14 @@ const (
 
 	// Display control
 	PRT_ONELINE = 			1
+	PRT_NORESOLVE_USER =	2
+)
+
+var (
+	// A global user/uid cache
+	gUsers		[]user
+	// A global group/gid cache
+	gGroups		[]group
 )
 
 // Fields types, from https://github.com/freebsd/freebsd-src/blob/main/contrib/openbsm/bsm/libbsm.h
@@ -282,6 +305,96 @@ type Text struct {
 
 
 /* Utilities */
+// users ID for resolution
+type user struct {
+	uid		uint32
+	name	string
+}
+
+// groups ID for resolution
+type group struct {
+	gid		uint32
+	name	string
+}
+
+/* Utilities */
+// Return uid if user not found
+func getUserName(uid uint32) (string, error) {
+	for _, u := range gUsers {
+		if u.uid == uid {
+			return u.name, nil
+		}
+	}
+	// Not found in cache, get it from system query
+	u, err := getUserNameByUid(uid)
+	if err != nil {
+		// If not found, return user object with name = uid
+		if err.Error() == "User ID not found" {
+			u.uid = uid
+			u.name = strconv.FormatUint(uint64(uid), 10)
+			gUsers = append(gUsers, u)
+			return u.name, err
+		} else {
+			return "", err
+		}
+	}
+	gUsers = append(gUsers, u)
+	return u.name, nil
+}
+func getUserNameByUid(uid uint32) (user, error) {
+    var pw  *C.struct_passwd
+    var usr user
+
+    pw = C.getpwuid((C.uint32_t)(uid))
+    if pw == nil {
+        return usr, fmt.Errorf("User ID not found")
+    }
+
+    usr.uid = uid
+    usr.name = C.GoString(pw.pw_name)
+
+    return usr, nil
+}
+
+
+func getGroupName(gid uint32) (string, error) {
+	for _, g := range gGroups {
+		if g.gid == gid {
+			return g.name, nil
+		}
+	}
+	// Not found in cache, get it from system query
+	g, err := getGroupNameByGid(gid)
+	if err != nil {
+		// If not found, return group object with name = gid
+		if err.Error() == "Group ID not found" {
+			g.gid = gid
+			g.name = strconv.FormatUint(uint64(gid), 10)
+			gGroups = append(gGroups, g)
+			return g.name, err
+		} else {
+			return "", err
+		}
+	}
+	gGroups = append(gGroups, g)
+	return g.name, nil
+}
+func getGroupNameByGid(gid uint32) (group, error) {
+    var gr  *C.struct_group
+    var grp group
+
+    gr = C.getgrgid((C.uint32_t)(gid))
+    if gr == nil {
+        return grp, fmt.Errorf("Group ID not found")
+    }
+
+    grp.gid = gid
+    grp.name = C.GoString(gr.gr_name)
+
+    return grp, nil
+}
+
+
 func PrintIpv4FromInt(ipv4int uint32) string {
 	return fmt.Sprintf("%d.%d.%d.%d", ipv4int & 0xFF000000 >> 24, ipv4int & 0x00FF0000 >> 16,
 								ipv4int & 0x0000FF00 >> 8, ipv4int & 0x000000FF)
@@ -296,7 +409,6 @@ func PrintIpv6FromInt(ipv6int [4]uint32) string {
 		ipv6int[3] & 0xFFFF0000 >> 16, ipv6int[3] & 0x0000FFFF)
 }
 
-
 /* Records structs implementation */
 func NewHeader32(h Header32) *Header32 {
 	return &Header32{
@@ -352,6 +464,8 @@ func (h *Header32) Print(file *os.File, delimiter string, flags int) {
 				h.E_type, delimiter, h.E_mod, delimiter, t.Format(time.UnixDate), delimiter, h.Msec)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -393,9 +507,9 @@ func (e *ExecArg) LoadFromBinary(file *os.File) error {
 			return fmt.Errorf("Error searching for null terminated exec arg: Loop exec n%d, offset of record start: %x, error : %v", i, startOf, err)
 		}
 		// Allocate before reading
-		//e.Text[i] = make([]byte, len(buf))
 		totLen += int64(len(arg))
-		e.Text = append(e.Text, arg)
+		//e.Text = append(e.Text, arg)	// Discard last 0
+		e.Text = append(e.Text, arg[:len(arg)-1])
 	}
 
 	startOf, err = file.Seek(int64(startOf+totLen), io.SeekStart)
@@ -417,6 +531,8 @@ func (e *ExecArg) Print(file *os.File, delimiter string, flags int) {
 	}
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -456,7 +572,7 @@ func (p *Path) LoadFromBinary(file *os.File) error {
 		return fmt.Errorf("Error searching for null terminated path: offset of record start: %x, error : %v", startOf, err)
 	}
 	totLen := int64(len(arg))
-	p.Path = arg
+	p.Path = arg[:totLen-1]
 
 	startOf, err = file.Seek(int64(startOf+totLen), io.SeekStart)
 	if err != nil {
@@ -470,6 +586,8 @@ func (p *Path) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "path%s%s", delimiter, string(p.Path))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -511,11 +629,24 @@ func (a *Attribute32) LoadFromBinary(file *os.File) error {
 }
 
 func (a *Attribute32) Print(file *os.File, delimiter string, flags int) {
+	var user	string
+	var group	string
 	// TODO : resolve Uid and Gid (also support domain accounts)
-	fmt.Fprintf(file, "attribute%s%o%s%v%s%v%s%v%s%v%s%v", delimiter, a.Mode, delimiter, a.Uid, delimiter,
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
-				a.Gid, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)
+		user =	string(a.Uid)
+		group =	string(a.Gid)
+	} else {
+		user, _ = getUserName(a.Uid)
+		group, _ = getGroupName(a.Gid)
+	}
+	
+	fmt.Fprintf(file, "attribute%s%o%s%v%s%v%s%v%s%v%s%v", delimiter, a.Mode, delimiter, user, delimiter,
+				group, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)
+
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -557,11 +688,22 @@ func (a *Attribute64) LoadFromBinary(file *os.File) error {
 }
 
 func (a *Attribute64) Print(file *os.File, delimiter string, flags int) {
+	var user string
+	var group string
 	// TODO : resolve Uid and Gid (also support domain accounts)
-	fmt.Fprintf(file, "attribute%s%o%s%v%s%v%s%v%s%v%s%v", delimiter, a.Mode, delimiter, a.Uid, delimiter,
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
-				a.Gid, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)
+		user =	string(a.Uid)
+		group =	string(a.Gid)
+	} else {
+		user, _ =	getUserName(a.Uid)
+		group, _ =	getGroupName(a.Gid)
+	}
+	fmt.Fprintf(file, "attribute%s%o%s%v%s%v%s%v%s%v%s%v", delimiter, a.Mode, delimiter, user, delimiter,
+				group, delimiter, a.Fsid, delimiter, a.Nid, delimiter, a.Dev)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -608,11 +750,28 @@ func (s *Subject32) LoadFromBinary(file *os.File) error {
 }
 
 func (s *Subject32) Print(file *os.File, delimiter string, flags int) {
-	fmt.Fprintf(file, "subject%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid, delimiter, s.Egid,
+	var euser	string
-				delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
+	var egroup	string
+	var ruser	string
+	var rgroup	string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(s.Euid)
+		egroup =	string(s.Egid)
+		ruser =		string(s.Ruid)
+		rgroup =	string(s.Rgid)
+	} else {
+		euser, _ =		getUserName(s.Euid)
+		egroup, _ =		getGroupName(s.Egid)
+		ruser, _ =		getUserName(s.Ruid)
+		rgroup, _ =		getGroupName(s.Rgid)
+	}
+	fmt.Fprintf(file, "subject%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, euser, delimiter, egroup,
+				delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
 				delimiter, PrintIpv4FromInt(s.Tid.Addr))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -659,11 +818,28 @@ func (p *Process32) LoadFromBinary(file *os.File) error {
 }
 
 func (p *Process32) Print(file *os.File, delimiter string, flags int) {
-	fmt.Fprintf(file, "process%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid, delimiter, p.Egid,
+	var euser	string
-				delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
+	var egroup	string
+	var ruser	string
+	var rgroup	string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(p.Euid)
+		egroup =	string(p.Egid)
+		ruser =		string(p.Ruid)
+		rgroup =	string(p.Rgid)
+	} else {
+		euser, _ =	getUserName(p.Euid)
+		egroup, _ =	getGroupName(p.Egid)
+		ruser, _ =	getUserName(p.Ruid)
+		rgroup, _ =	getGroupName(p.Rgid)
+	}
+	fmt.Fprintf(file, "process%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, euser, delimiter, egroup,
+				delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
 				delimiter, PrintIpv4FromInt(p.Tid.Addr))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -725,17 +901,35 @@ func (s *Subject32Ex) LoadFromBinary(file *os.File) error {
 }
 
 func (s *Subject32Ex) Print(file *os.File, delimiter string, flags int) {
-	if s.Tid.IpVers == 0x04 {
+	var euser	string
-		fmt.Fprintf(file, "subject_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid,
+	var egroup	string
-				delimiter, s.Egid, delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+	var ruser	string
-				s.Tid.Ttype, delimiter, PrintIpv4FromInt(s.Tid.Addr4))
+	var rgroup	string
+	var ip		string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(s.Euid)
+		egroup =	string(s.Egid)
+		ruser =		string(s.Ruid)
+		rgroup =	string(s.Rgid)
 	} else {
-		fmt.Fprintf(file, "subject_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid,
+		euser, _ =	getUserName(s.Euid)
-				delimiter, s.Egid, delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+		egroup, _ =	getGroupName(s.Egid)
-				s.Tid.Ttype, delimiter, PrintIpv6FromInt(s.Tid.Addr6))
+		ruser, _ =	getUserName(s.Ruid)
+		rgroup, _ =	getGroupName(s.Rgid)
 	}
+	if s.Tid.IpVers == 0x04 {
+		ip = PrintIpv4FromInt(s.Tid.Addr4)
+	} else {
+		ip = PrintIpv6FromInt(s.Tid.Addr6)
+	}
+	fmt.Fprintf(file, "subject_ex%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, euser,
+				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+				s.Tid.Ttype, delimiter, ip)
+	
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -797,17 +991,37 @@ func (p *Process32Ex) LoadFromBinary(file *os.File) error {
 }
 
 func (p *Process32Ex) Print(file *os.File, delimiter string, flags int) {
-	if p.Tid.IpVers == 0x04 {
+	var euser	string
-		fmt.Fprintf(file, "process_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid,
+	var egroup	string
-				delimiter, p.Egid, delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+	var ruser	string
-				p.Tid.Ttype, delimiter, PrintIpv4FromInt(p.Tid.Addr4))
+	var rgroup	string
+	var ip		string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(p.Euid)
+		egroup =	string(p.Egid)
+		ruser =		string(p.Ruid)
+		rgroup =	string(p.Rgid)
 	} else {
-		fmt.Fprintf(file, "process_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid,
+		euser, _ =	getUserName(p.Euid)
-				delimiter, p.Egid, delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+		egroup, _ =	getGroupName(p.Egid)
-				p.Tid.Ttype, delimiter, PrintIpv6FromInt(p.Tid.Addr6))
+		ruser, _ =	getUserName(p.Ruid)
+		rgroup, _ =	getGroupName(p.Rgid)
 	}
+	
+	if p.Tid.IpVers == 0x04 {
+		ip = PrintIpv4FromInt(p.Tid.Addr4)
+	} else {
+		ip = PrintIpv6FromInt(p.Tid.Addr6)
+	}
+
+	fmt.Fprintf(file, "process_ex%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, euser,
+				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+				p.Tid.Ttype, delimiter, ip)
+	
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -854,11 +1068,28 @@ func (s *Subject64) LoadFromBinary(file *os.File) error {
 }
 
 func (s *Subject64) Print(file *os.File, delimiter string, flags int) {
-	fmt.Fprintf(file, "subject%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid, delimiter, s.Egid,
+	var euser	string
-				delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
+	var egroup	string
+	var ruser	string
+	var rgroup	string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(s.Euid)
+		egroup =	string(s.Egid)
+		ruser =		string(s.Ruid)
+		rgroup =	string(s.Rgid)
+	} else {
+		euser, _ =	getUserName(s.Euid)
+		egroup, _ =	getGroupName(s.Egid)
+		ruser, _ =	getUserName(s.Ruid)
+		rgroup, _ =	getGroupName(s.Rgid)
+	}
+	fmt.Fprintf(file, "subject%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, euser, delimiter, egroup,
+				delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter, s.Tid.IpVers,
 				delimiter, PrintIpv4FromInt(s.Tid.Addr))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -905,11 +1136,28 @@ func (p *Process64) LoadFromBinary(file *os.File) error {
 }
 
 func (p *Process64) Print(file *os.File, delimiter string, flags int) {
-	fmt.Fprintf(file, "process%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid, delimiter, p.Egid,
+	var euser	string
-				delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
+	var egroup	string
+	var ruser	string
+	var rgroup	string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(p.Euid)
+		egroup =	string(p.Egid)
+		ruser =		string(p.Ruid)
+		rgroup =	string(p.Rgid)
+	} else {
+		euser, _ =	getUserName(p.Euid)
+		egroup, _ =	getGroupName(p.Egid)
+		ruser, _ =	getUserName(p.Ruid)
+		rgroup, _ =	getGroupName(p.Rgid)
+	}
+	fmt.Fprintf(file, "process%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, euser, delimiter, egroup,
+				delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter, p.Tid.IpVers,
 				delimiter, PrintIpv4FromInt(p.Tid.Addr))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -970,17 +1218,36 @@ func (s *Subject64Ex) LoadFromBinary(file *os.File) error {
 }
 
 func (s *Subject64Ex) Print(file *os.File, delimiter string, flags int) {
-	if s.Tid.IpVers == 0x04 {
+	var euser	string
-		fmt.Fprintf(file, "subject_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid,
+	var egroup	string
-				delimiter, s.Egid, delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+	var ruser	string
-				s.Tid.Ttype, delimiter, PrintIpv4FromInt(s.Tid.Addr4))
+	var rgroup	string
+	var ip		string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(s.Euid)
+		egroup =	string(s.Egid)
+		ruser =		string(s.Ruid)
+		rgroup =	string(s.Rgid)
 	} else {
-		fmt.Fprintf(file, "subject_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, s.Euid,
+		euser, _ =	getUserName(s.Euid)
-				delimiter, s.Egid, delimiter, s.Ruid, delimiter, s.Rgid, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+		egroup, _ =	getGroupName(s.Egid)
-				s.Tid.Ttype, delimiter, PrintIpv6FromInt(s.Tid.Addr6))
+		ruser, _ =	getUserName(s.Ruid)
+		rgroup, _ =	getGroupName(s.Rgid)
 	}
+	if s.Tid.IpVers == 0x04 {
+		ip = PrintIpv4FromInt(s.Tid.Addr4)
+	} else {
+		ip = PrintIpv6FromInt(s.Tid.Addr6)
+	}
+
+	fmt.Fprintf(file, "subject_ex%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, s.Auid, delimiter, euser,
+				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, s.Sid, delimiter, s.Tid.Port, delimiter,
+				s.Tid.Ttype, delimiter, ip)
+	
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -998,7 +1265,7 @@ func NewProcess64Ex(p Process64Ex) *Process64Ex {
 }
 
 func (p *Process64Ex) GetType() uint8 {
-	return AUT_SUBJECT64_EX
+	return AUT_PROCESS64_EX
 }
 
 func (p *Process64Ex) LoadFromBinary(file *os.File) error {
@@ -1041,17 +1308,36 @@ func (p *Process64Ex) LoadFromBinary(file *os.File) error {
 }
 
 func (p *Process64Ex) Print(file *os.File, delimiter string, flags int) {
-	if p.Tid.IpVers == 0x04 {
+	var euser	string
-		fmt.Fprintf(file, "process_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid,
+	var egroup	string
-				delimiter, p.Egid, delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+	var ruser	string
-				p.Tid.Ttype, delimiter, PrintIpv4FromInt(p.Tid.Addr4))
+	var rgroup	string
+	var ip		string
+	if PRT_NORESOLVE_USER == flags & PRT_NORESOLVE_USER {
+		euser =		string(p.Euid)
+		egroup =	string(p.Egid)
+		ruser =		string(p.Ruid)
+		rgroup =	string(p.Rgid)
 	} else {
-		fmt.Fprintf(file, "process_ex%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, p.Euid,
+		euser, _ =	getUserName(p.Euid)
-				delimiter, p.Egid, delimiter, p.Ruid, delimiter, p.Rgid, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+		egroup, _ =	getGroupName(p.Egid)
-				p.Tid.Ttype, delimiter, PrintIpv6FromInt(p.Tid.Addr6))
+		ruser, _ =	getUserName(p.Ruid)
+		rgroup, _ =	getGroupName(p.Rgid)
 	}
+	if p.Tid.IpVers == 0x04 {
+		ip = PrintIpv4FromInt(p.Tid.Addr4)
+	} else {
+		ip = PrintIpv6FromInt(p.Tid.Addr6)
+	}
+
+	fmt.Fprintf(file, "process_ex%s%v%s%s%s%s%s%s%s%s%s%v%s%v%s%v%s%s", delimiter, p.Auid, delimiter, euser,
+				delimiter, egroup, delimiter, ruser, delimiter, rgroup, delimiter, p.Sid, delimiter, p.Tid.Port, delimiter,
+				p.Tid.Ttype, delimiter, ip)
+	
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1080,6 +1366,8 @@ func (r *Return32) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "return%s%v%s%v", delimiter, r.Status, delimiter, r.Ret)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1108,6 +1396,8 @@ func (r *Return64) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "return%s%v%s%v", delimiter, r.Status, delimiter, r.Ret)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1134,10 +1424,9 @@ func (t *Trailer) LoadFromBinary(file *os.File) error {
 
 func (t *Trailer) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "trailer%s%v", delimiter, t.Count)
-	if 0 == (flags & PRT_ONELINE) {
+// The trailer close the record print, whatever the oneLine flag value
 	fmt.Fprintf(file, "\n")
 }
-}
 
 func NewArg32(a Arg32) *Arg32 {
 	return &Arg32{
@@ -1182,7 +1471,7 @@ func (a *Arg32) LoadFromBinary(file *os.File) error {
 		return fmt.Errorf("Error searching for null terminated path: offset of record start: %x, error : %v", startOf, err)
 	}
 	totLen := int64(len(arg))
-	a.Text = arg
+	a.Text = arg[:totLen-1]
 
 	startOf, err = file.Seek(int64(startOf+totLen), io.SeekStart)
 	if err != nil {
@@ -1196,6 +1485,8 @@ func (a *Arg32) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "argument%s%v%s%v%s%s", delimiter, a.No, delimiter, a.Val, delimiter, string(a.Text))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1242,7 +1533,7 @@ func (a *Arg64) LoadFromBinary(file *os.File) error {
 		return fmt.Errorf("Error searching for null terminated path: offset of record start: %x, error : %v", startOf, err)
 	}
 	totLen := int64(len(arg))
-	a.Text = arg
+	a.Text = arg[:totLen-1]
 
 	startOf, err = file.Seek(int64(startOf+totLen), io.SeekStart)
 	if err != nil {
@@ -1256,6 +1547,8 @@ func (a *Arg64) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "argument%s%v%s%v%s%s", delimiter, a.No, delimiter, a.Val, delimiter, string(a.Text))
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1284,6 +1577,8 @@ func (e *Exit) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "exit%s%v%s%v", delimiter, e.Status, delimiter, e.Ret)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1306,7 +1601,7 @@ func (t *Text) LoadFromBinary(file *os.File) error {
 	text := make([]byte, t.Length)
 	err = binary.Read(file, binary.BigEndian, &text)
 	if err != nil { return fmt.Errorf("Unable to read Text.Text from file: %v", err) }
-	t.Text = text
+	t.Text = text[:len(text)-1]
 
 	return nil
 }
@@ -1315,6 +1610,8 @@ func (t *Text) Print(file *os.File, delimiter string, flags int) {
 	fmt.Fprintf(file, "text%s%s", delimiter, t.Text)
 	if 0 == (flags & PRT_ONELINE) {
 		fmt.Fprintf(file, "\n")
+	} else {
+		fmt.Fprintf(file, "%s", delimiter)
 	}
 }
 
@@ -1334,7 +1631,6 @@ func readRecordToStruct(file *os.File) (Record, error) {
 /*	startOf, _ := file.Seek(0, io.SeekCurrent)
 	fmt.Printf("Offset dans le fichier : %x\n", startOf)
 */	
-	//switch hdr.(int8) {
 	switch (int8)(hdr[0]) {
 		case AUT_HEADER32:
 			var h Header32

main.go

@@ -104,8 +104,12 @@ func print_tokens(filename string) error {
 
 
 func main() {
+	var flags int
+	var oneLine bool
+	var noUserResolve bool
 
-	pflag.BoolVarP(&randFlag, "randFlag", "r", false, "A random flag, just to play you.")
+	pflag.BoolVarP(&oneLine, "oneline", "l", false, "Prints the entire record on the same line. If this option is not specified, every token is displayed on a different line.")
+	pflag.BoolVarP(&noUserResolve, "numeric", "n", false, "Do not convert user and group IDs to their names but leave in their numeric forms.")
 	pflag.BoolVarP(&showVersion, "version", "V", false, "Show version then exit")
 
 	pflag.Parse()
@@ -115,6 +119,14 @@ func main() {
 		return
 	}
 
+	if oneLine {
+		flags = flags + PRT_ONELINE
+	}
+
+	if noUserResolve {
+		flags = flags + PRT_NORESOLVE_USER
+	}
+
 	args := os.Args
 
 	filename := args[len(args)-1]
@@ -146,7 +158,7 @@ func main() {
 				}
 				return
 			}
-			rec.Print(os.Stdout, ",", 0)
+			rec.Print(os.Stdout, ",", flags)
 		}
 	}
 }