get parent pid from tmux client

Author: lonnywong

go.mod

@@ -10,8 +10,8 @@ require (
 	github.com/stretchr/testify v1.8.4
 	github.com/trzsz/go-arg v1.5.3
 	github.com/trzsz/promptui v0.10.5
-	golang.org/x/sys v0.15.0
-	golang.org/x/term v0.15.0
+	golang.org/x/sys v0.16.0
+	golang.org/x/term v0.16.0
 	golang.org/x/text v0.14.0
 )
 
@@ -24,6 +24,6 @@ require (
 	github.com/josephspurrier/goversioninfo v1.4.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/randall77/makefat v0.0.0-20210315173500-7ddd0e42c844 // indirect
-	golang.org/x/image v0.14.0 // indirect
+	golang.org/x/image v0.15.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -37,15 +37,15 @@ github.com/trzsz/go-arg v1.5.3/go.mod h1:IC6Z/FiVH7uYvcbp1/gJhDYCFPS/GkL0APYakVv
 github.com/trzsz/promptui v0.10.5 h1:tlzJkx+JOeE0sqKWmqgaoToZiYqj5G1Mz+QDV97VFu8=
 github.com/trzsz/promptui v0.10.5/go.mod h1:GMZtu6ZTzU73CBFkzGtmB4wnTROIAbv4GFA74fV8V8g=
 go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
-golang.org/x/image v0.14.0 h1:tNgSxAFe3jC4uYqvZdTr84SZoM1KfwdC9SKIFrLjFn4=
-golang.org/x/image v0.14.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
+golang.org/x/image v0.15.0 h1:kOELfmgrmJlw4Cdb7g/QGuB3CvDrXbqEIww/pNtNBm8=
+golang.org/x/image v0.15.0/go.mod h1:HUYqC05R2ZcZ3ejNQsIHQDQiwWM4JBqmm6MKANTp4LE=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
-golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/term v0.15.0 h1:y/Oo/a/q3IXu26lQgl04j/gjuBDOBlx7X6Om1j2CPW4=
-golang.org/x/term v0.15.0/go.mod h1:BDl952bC7+uMoWR75FIrCDx79TPU9oHkTZ9yRbYOrX0=
+golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
+golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.16.0 h1:m+B6fahuftsE9qjo0VWp2FW0mB3MTJvR0BaMQrq0pmE=
+golang.org/x/term v0.16.0/go.mod h1:yn7UURbUtPyrVJPGPq404EukNFxcm/foM+bV/bfcDsY=
 golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=

trzsz/utils_darwin.go

@@ -29,13 +29,14 @@ import (
 	"os"
 	"os/exec"
 	"strconv"
+	"strings"
 	"sync"
 
 	"golang.org/x/sys/unix"
 )
 
 func getParentWindowID() any {
-	pid := os.Getppid()
+	pid := getParentPid()
 	for i := 0; i < 1000; i++ {
 		kinfo, err := unix.SysctlKinfoProc("kern.proc.pid", pid)
 		if err != nil {
@@ -59,6 +60,26 @@ func getParentWindowID() any {
 	return 0
 }
 
+func getParentPid() int {
+	if _, tmux := os.LookupEnv("TMUX"); !tmux {
+		return os.Getppid()
+	}
+
+	cmd := exec.Command("tmux", "display-message", "-p", "#{client_pid}")
+	cmd.Stdin = os.Stdin
+	out, err := cmd.Output()
+	if err != nil {
+		return os.Getppid()
+	}
+
+	pid, err := strconv.Atoi(strings.TrimSpace(string(out)))
+	if err != nil {
+		return os.Getppid()
+	}
+
+	return pid
+}
+
 var (
 	warpOnce     sync.Once
 	warpTerminal bool