mirror of https://github.com/cjbassi/gotop.git
141 lines
3.0 KiB
Go
141 lines
3.0 KiB
Go
// +build linux freebsd openbsd darwin
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package process
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import (
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"context"
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"os"
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"os/user"
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"path/filepath"
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"strconv"
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"strings"
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"syscall"
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"golang.org/x/sys/unix"
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)
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// POSIX
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func getTerminalMap() (map[uint64]string, error) {
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ret := make(map[uint64]string)
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var termfiles []string
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d, err := os.Open("/dev")
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if err != nil {
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return nil, err
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}
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defer d.Close()
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devnames, err := d.Readdirnames(-1)
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for _, devname := range devnames {
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if strings.HasPrefix(devname, "/dev/tty") {
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termfiles = append(termfiles, "/dev/tty/"+devname)
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}
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}
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var ptsnames []string
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ptsd, err := os.Open("/dev/pts")
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if err != nil {
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ptsnames, _ = filepath.Glob("/dev/ttyp*")
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if ptsnames == nil {
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return nil, err
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}
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}
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defer ptsd.Close()
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if ptsnames == nil {
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defer ptsd.Close()
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ptsnames, err = ptsd.Readdirnames(-1)
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for _, ptsname := range ptsnames {
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termfiles = append(termfiles, "/dev/pts/"+ptsname)
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}
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} else {
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termfiles = ptsnames
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}
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for _, name := range termfiles {
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stat := unix.Stat_t{}
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if err = unix.Stat(name, &stat); err != nil {
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return nil, err
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}
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rdev := uint64(stat.Rdev)
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ret[rdev] = strings.Replace(name, "/dev", "", -1)
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}
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return ret, nil
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}
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// SendSignal sends a unix.Signal to the process.
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// Currently, SIGSTOP, SIGCONT, SIGTERM and SIGKILL are supported.
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func (p *Process) SendSignal(sig syscall.Signal) error {
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return p.SendSignalWithContext(context.Background(), sig)
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}
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func (p *Process) SendSignalWithContext(ctx context.Context, sig syscall.Signal) error {
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process, err := os.FindProcess(int(p.Pid))
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if err != nil {
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return err
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}
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err = process.Signal(sig)
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if err != nil {
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return err
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}
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return nil
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}
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// Suspend sends SIGSTOP to the process.
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func (p *Process) Suspend() error {
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return p.SuspendWithContext(context.Background())
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}
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func (p *Process) SuspendWithContext(ctx context.Context) error {
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return p.SendSignal(unix.SIGSTOP)
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}
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// Resume sends SIGCONT to the process.
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func (p *Process) Resume() error {
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return p.ResumeWithContext(context.Background())
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}
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func (p *Process) ResumeWithContext(ctx context.Context) error {
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return p.SendSignal(unix.SIGCONT)
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}
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// Terminate sends SIGTERM to the process.
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func (p *Process) Terminate() error {
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return p.TerminateWithContext(context.Background())
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}
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func (p *Process) TerminateWithContext(ctx context.Context) error {
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return p.SendSignal(unix.SIGTERM)
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}
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// Kill sends SIGKILL to the process.
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func (p *Process) Kill() error {
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return p.KillWithContext(context.Background())
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}
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func (p *Process) KillWithContext(ctx context.Context) error {
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return p.SendSignal(unix.SIGKILL)
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}
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// Username returns a username of the process.
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func (p *Process) Username() (string, error) {
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return p.UsernameWithContext(context.Background())
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}
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func (p *Process) UsernameWithContext(ctx context.Context) (string, error) {
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uids, err := p.Uids()
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if err != nil {
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return "", err
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}
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if len(uids) > 0 {
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u, err := user.LookupId(strconv.Itoa(int(uids[0])))
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if err != nil {
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return "", err
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}
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return u.Username, nil
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}
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return "", nil
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}
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