Show filt result in tree&json, fix sth in listenerHEADmasterdev

In the listener, I change the order coroutines are started to avoid
'send on a closed channel'. Besides, the method to get syscall names
and numbers are not so universial, so let's go back to check unistd.h.

In the filter, the output is set to be written to ./log dir. Pid tree
are shown in logs/tree.log, and detail info in pids.log, while file info
in the logs/files.log. tree.log shows a tree just like `tree` command,
the other two files are written in json.

What's more, the flags while opening files are also checked ans showed
in files.log.

1 files changed, 44 insertions, 29 deletions

diff --git a/filter/global.go b/filter/global.go
index bade895..7ba3fc1 100644
--- a/filter/global.go
+++ b/filter/global.go
@@ -1,39 +1,40 @@
 package main
 
 import (
+        "encoding/json"
         "fmt"
         "time"
 )
 
 type Exec struct {
-        Timestamp time.Time `bson:"timestamp"`
-        ExecArgs  []string  `bson:"execArgs"`
+        Timestamp time.Time `bson:"timestamp" json:"timestamp"`
+        ExecArgs  []string  `bson:"execArgs" json:"execArgs"`
 }
 
 type Process struct {
-        Star           bool      `bson:"star"`
-        StartTimestamp time.Time `bson:"start_timestamp"`
-        Ppid           int       `bson:"ppid"`
-        ParentTgid     int       `bson:"parentTgid"`
-        Pid            int       `bson:"pid"`
-        Tgid           int       `bson:"tgid"`
-        Args           []string  `bson:"args"`
-        Comm           string    `bson:"comm"`
-        RootFS         string    `bson:"rootfs"`
-        Cwd            string    `bson:"cwd"`
-        Children       []int     `bson:"children"`
-        DockerId       string    `bson:"docker_id"`
-        Execve         []Exec    `bson:"execve"`
-        ExitCode       int       `bson:"exit_code"`
-        ExitSignal     int       `bson:"exit_signal"`
-        ExitTimestamp  time.Time `bson:"exit_timestamp"`
+        Star           bool      `bson:"star" json:"star"`
+        StartTimestamp time.Time `bson:"start_timestamp" json:"start_timestamp"`
+        Ppid           int       `bson:"ppid" json:"ppid"`
+        ParentTgid     int       `bson:"parentTgid" json:"parentTgid"`
+        Pid            int       `bson:"pid" json:"pid"`
+        Tgid           int       `bson:"tgid" json:"tgid"`
+        Args           []string  `bson:"args" json:"args"`
+        Comm           string    `bson:"comm" json:"comm"`
+        RootFS         string    `bson:"rootfs" json:"rootfs"`
+        Cwd            string    `bson:"cwd" json:"cwd"`
+        Children       []int     `bson:"children" json:"children"`
+        DockerId       string    `bson:"docker_id" json:"docker_id"`
+        Execve         []Exec    `bson:"execve" json:"execve"`
+        ExitCode       int       `bson:"exit_code" json:"exit_code"`
+        ExitSignal     int       `bson:"exit_signal" json:"exit_signal"`
+        ExitTimestamp  time.Time `bson:"exit_timestamp" json:"exit_timestamp"`
 }
 
 type tgidNode struct {
-        Tgid      int         `bson:"tgid"`
-        FindPid   map[int]int `bson:"findPid"`
-        Threads   []Process   `bson:"threads"`
-        ChildTgid []int       `bson:"child_tgid"`
+        Tgid      int         `bson:"tgid" json:"tgid"`
+        FindPid   map[int]int `bson:"findPid" json:"findPid"`
+        Threads   []Process   `bson:"threads" json:"threads"`
+        ChildTgid []int       `bson:"child_tgid" json:"child_tgid"`
 }
 
 func (p Process) String() string {
@@ -80,13 +81,27 @@ func (node tgidNode) String() string {
 }
 
 type File struct {
-        OpenTimestamp  time.Time   `bson:"timestamp"`
-        FileName       string      `bson:"fileName"`
-        Pid            int         `bson:"pid"`
-        Fd             int         `bson:"fd"`
-        Flags          [4]uint64   `bson:"flags"`
-        Written        []time.Time `bson:"written"`
-        CloseTimestamp time.Time   `bson:"close_timestamp"`
+        OpenTimestamp  time.Time   `bson:"timestamp" json:"timestamp"`
+        FileName       string      `bson:"fileName" json:"fileName"`
+        Pid            int         `bson:"pid" json:"pid"`
+        Fd             int         `bson:"fd" json:"fd"`
+        Flags          [4]uint64   `bson:"flags" json:"flags"`
+        Written        []time.Time `bson:"written" json:"written"`
+        CloseTimestamp time.Time   `bson:"close_timestamp" json:"close_timestamp"`
+}
+
+func (f File) MarshalJSON() ([]byte, error) {
+        type Alias File // 使用别名避免递归调用
+
+        return json.Marshal(&struct {
+                Alias
+                Flags0 string `json:"FileNamePointer"`
+                Flags1 string `json:"FileFlags"`
+        }{
+                Alias:  Alias(f),
+                Flags0: fmt.Sprintf("%#012x", f.Flags[0]), // flags[0] 转换为小写16进制
+                Flags1: parseFlags(f.Flags[1]),            // flags[1] 解析为字符串
+        })
 }
 
 // Queue 定义一个队列结构体