Fix missing vendor dir

vendor/github.com/shirou/gopsutil/process/process_posix.go

@@ -0,0 +1,180 @@
+// +build linux freebsd openbsd darwin solaris
+
+package process
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"github.com/shirou/gopsutil/internal/common"
+	"golang.org/x/sys/unix"
+)
+
+// POSIX
+func getTerminalMap() (map[uint64]string, error) {
+	ret := make(map[uint64]string)
+	var termfiles []string
+
+	d, err := os.Open("/dev")
+	if err != nil {
+		return nil, err
+	}
+	defer d.Close()
+
+	devnames, err := d.Readdirnames(-1)
+	if err != nil {
+		return nil, err
+	}
+	for _, devname := range devnames {
+		if strings.HasPrefix(devname, "/dev/tty") {
+			termfiles = append(termfiles, "/dev/tty/"+devname)
+		}
+	}
+
+	var ptsnames []string
+	ptsd, err := os.Open("/dev/pts")
+	if err != nil {
+		ptsnames, _ = filepath.Glob("/dev/ttyp*")
+		if ptsnames == nil {
+			return nil, err
+		}
+	}
+	defer ptsd.Close()
+
+	if ptsnames == nil {
+		defer ptsd.Close()
+		ptsnames, err = ptsd.Readdirnames(-1)
+		if err != nil {
+			return nil, err
+		}
+		for _, ptsname := range ptsnames {
+			termfiles = append(termfiles, "/dev/pts/"+ptsname)
+		}
+	} else {
+		termfiles = ptsnames
+	}
+
+	for _, name := range termfiles {
+		stat := unix.Stat_t{}
+		if err = unix.Stat(name, &stat); err != nil {
+			return nil, err
+		}
+		rdev := uint64(stat.Rdev)
+		ret[rdev] = strings.Replace(name, "/dev", "", -1)
+	}
+	return ret, nil
+}
+
+// isMount is a port of python's os.path.ismount()
+// https://github.com/python/cpython/blob/08ff4369afca84587b1c82034af4e9f64caddbf2/Lib/posixpath.py#L186-L216
+// https://docs.python.org/3/library/os.path.html#os.path.ismount
+func isMount(path string) bool {
+	// Check symlinkness with os.Lstat; unix.DT_LNK is not portable
+	fileInfo, err := os.Lstat(path)
+	if err != nil {
+		return false
+	}
+	if fileInfo.Mode() & os.ModeSymlink != 0 {
+		return false
+	}
+	var stat1 unix.Stat_t
+	if err := unix.Lstat(path, &stat1); err != nil {
+		return false
+	}
+	parent := filepath.Join(path, "..")
+	var stat2 unix.Stat_t
+	if err := unix.Lstat(parent, &stat2); err != nil {
+		return false
+	}
+	return stat1.Dev != stat2.Dev || stat1.Ino == stat2.Ino
+}
+
+func PidExistsWithContext(ctx context.Context, pid int32) (bool, error) {
+	if pid <= 0 {
+		return false, fmt.Errorf("invalid pid %v", pid)
+	}
+	proc, err := os.FindProcess(int(pid))
+	if err != nil {
+		return false, err
+	}
+
+	if isMount(common.HostProc()) { // if /<HOST_PROC>/proc exists and is mounted, check if /<HOST_PROC>/proc/<PID> folder exists
+		_, err := os.Stat(common.HostProc(strconv.Itoa(int(pid))))
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return err == nil, err
+	}
+
+	// procfs does not exist or is not mounted, check PID existence by signalling the pid
+	err = proc.Signal(syscall.Signal(0))
+	if err == nil {
+		return true, nil
+	}
+	if err.Error() == "os: process already finished" {
+		return false, nil
+	}
+	errno, ok := err.(syscall.Errno)
+	if !ok {
+		return false, err
+	}
+	switch errno {
+	case syscall.ESRCH:
+		return false, nil
+	case syscall.EPERM:
+		return true, nil
+	}
+
+	return false, err
+}
+
+func (p *Process) SendSignalWithContext(ctx context.Context, sig syscall.Signal) error {
+	process, err := os.FindProcess(int(p.Pid))
+	if err != nil {
+		return err
+	}
+
+	err = process.Signal(sig)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *Process) SuspendWithContext(ctx context.Context) error {
+	return p.SendSignalWithContext(ctx, unix.SIGSTOP)
+}
+
+func (p *Process) ResumeWithContext(ctx context.Context) error {
+	return p.SendSignalWithContext(ctx, unix.SIGCONT)
+}
+
+func (p *Process) TerminateWithContext(ctx context.Context) error {
+	return p.SendSignalWithContext(ctx, unix.SIGTERM)
+}
+
+func (p *Process) KillWithContext(ctx context.Context) error {
+	return p.SendSignalWithContext(ctx, unix.SIGKILL)
+}
+
+func (p *Process) UsernameWithContext(ctx context.Context) (string, error) {
+	uids, err := p.UidsWithContext(ctx)
+	if err != nil {
+		return "", err
+	}
+	if len(uids) > 0 {
+		u, err := user.LookupId(strconv.Itoa(int(uids[0])))
+		if err != nil {
+			return "", err
+		}
+		return u.Username, nil
+	}
+	return "", nil
+}