go pid tid

PID(process ID): 进程ID
PPID(parent process ID)：父进程ID号
PGID(Process Group ID 进程组 ID号)
TGID(Thread Group ID): 线程组ID号
SID(Session ID): 会话ID。在shell支持工作控制(job control)的前提下，多个进程组还可以构成一个会话。
TID(Thread ID): 线程ID

package main
import (
    "fmt"
    "golang.org/x/sys/unix"
    "time"
)

func see(s string) {
    getid("see " + s)

}

func getid(s string) {
    pid := unix.Getpid()
    fmt.Println(s+" Getpid", pid)
    fmt.Println(s+" Gettid", unix.Gettid())
    fmt.Println(s+" Getppid", unix.Getppid())
    pgid, _ := unix.Getpgid(pid)
    fmt.Println(s+" Getpgid", pgid)
    sid, _ := unix.Getsid(pid)
    fmt.Println(s+" Getsid", sid)
    /*
    fmt.Println(s+" Getegid", unix.Getegid())
    fmt.Println(s+" Geteuid", unix.Geteuid())
    fmt.Println(s+" Getgid", unix.Getgid())
    fmt.Println(s+" Getuid", unix.Getuid())
    */
}

func main() {
    go see("hello")
    go see("world")
    getid("main")
    time.Sleep(1 * time.Second)
}

 

cts@cts-pc:~/test$ ./test
main Getpid 29402
main Gettid 29402
main Getppid 28599
main Getpgid 29402
main Getsid 28599
see hello Getpid 29402
see hello Gettid 29406
see hello Getppid 28599
see hello Getpgid 29402
see hello Getsid 28599
see world Getpid 29402
see world Gettid 29405
see world Getppid 28599
see world Getpgid 29402
see world Getsid 28599