KurlesHS/restic
1
0
Fork 0
forked from TrueCloudLab/restic
Code Pull requests Activity

Properly detect mintty output redirection

Browse source 
mintty on windows always uses pipes to connect stdout between processes
and for the terminal output. The previous implementation always assumed
that stdout connected to a pipe means that stdout is displayed on a
mintty terminal. However, this detection breaks when using pipes to
connect processes and for powershell which uses pipes when redirecting
to a file.

Now the pipe filename is queried and matched against the pattern used by
msys / cygwin when connected to the terminal. In all other cases assume
that a pipe is just a regular pipe.
This commit is contained in:
Michael Eischer 2021-03-07 23:17:11 +01:00
parent 5e6af77b7a
commit 80564a9bc9
3 changed files with 35 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
go.mod
View file

@ -37,7 +37,7 @@ require (
golang.org/x/net v0.0.0-20200904194848-62affa334b73
golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4
golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b
golang.org/x/text v0.3.4
google.golang.org/api v0.32.0
gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect

3
go.sum
View file

@ -379,8 +379,9 @@ golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7w
golang.org/x/sys v0.0.0-20200828194041-157a740278f4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k=
golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b h1:ggRgirZABFolTmi3sn6Ivd9SipZwLedQ5wR0aAKnFxU=
golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221 h1:/ZHdbVpdR/jk3g30/d4yUL0JU9kksj8+F/bnQUVLGDM=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

35
internal/ui/termstatus/terminal_windows.go
View file

@ -4,6 +4,7 @@ package termstatus
import (
"io"
"strings"
"syscall"
"unsafe"
@ -80,6 +81,22 @@ func isPipe(fd uintptr) bool {
return err == nil && typ == windows.FILE_TYPE_PIPE
}
func getFileNameByHandle(fd uintptr) (string, error) {
type FILE_NAME_INFO struct {
FileNameLength int32
FileName [windows.MAX_LONG_PATH]uint16
}
var fi FILE_NAME_INFO
err := windows.GetFileInformationByHandleEx(windows.Handle(fd), windows.FileNameInfo, (*byte)(unsafe.Pointer(&fi)), uint32(unsafe.Sizeof(fi)))
if err != nil {
return "", err
}
filename := syscall.UTF16ToString(fi.FileName[:])
return filename, nil
}
// CanUpdateStatus returns true if status lines can be printed, the process
// output is not redirected to a file or pipe.
func CanUpdateStatus(fd uintptr) bool {
@ -88,11 +105,23 @@ func CanUpdateStatus(fd uintptr) bool {
return true
}
// check that the output file type is a pipe (0x0003)
// pipes require special handling
if !isPipe(fd) {
return false
}
// assume we're running in mintty/cygwin
return true
fn, err := getFileNameByHandle(fd)
if err != nil {
return false
}
// inspired by https://github.com/RyanGlScott/mintty/blob/master/src/System/Console/MinTTY/Win32.hsc
// terminal: \msys-dd50a72ab4668b33-pty0-to-master
// pipe to cat: \msys-dd50a72ab4668b33-13244-pipe-0x16
if (strings.HasPrefix(fn, "\\cygwin-") || strings.HasPrefix(fn, "\\msys-")) &&
strings.Contains(fn, "-pty") && strings.HasSuffix(fn, "-master") {
return true
}
return false
}