os: Getwd returns wrong path format in MinGW

[enihcam]

What version of Go are you using (go version)?

$ go version
go1.15.7 windows/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
set GO111MODULE=on
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\guest\AppData\Local\go-build
set GOENV=C:\Users\guest\AppData\Roaming\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\guest\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\guest\go
set GOPRIVATE=
set GOPROXY=
set GOROOT=c:\go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=c:\go\pkg\tool\windows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=NUL
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\guest\AppData\Local\Temp\go-build066057222=/tmp/go-build -gno-record-gcc-switches

What did you do?

run exec.Command(filepath.Join(os.Getwd(), 'app') under:

~ $ uname -a
MINGW64_NT-10.0-17763 dell 3.1.7-340.x86_64 2020-10-23 13:08 UTC x86_64 Msys
~ $ pwd
/c/Users/guest

What did you expect to see?

app output

What did you see instead?

exec: "C:\\Users\\guest\\app": file does not exist

[AlexRouSg]

Is the issue the printed path shows "C:\\Users\\guest\\app" or is the issue that it gives a error?

Because I cannot reproduce the error on msys on windows if app is actually in the working directory.

[enihcam]

@AlexRouSg @seankhliao here is how i reproduce the problem:

~ $ ls app
app*
~ $ pwd
/c/Users/guest

now try this code:

func main() {
	dir, _ := os.Getwd()
	ret := exec.Command(filepath.Join(dir, "app"))
	fmt.Println(ret.Output())
}

i got

[] exec: "C:\\Users\\guest\\app": file does not exist

my expectation would be:

1. os.Getwd() returns /c/Users/guest instead of C:\\Users\\guest, i.e. same as the output from bash cmd pwd
2. correspondingly, filepath.Join() returns /c/Users/guest/app
3. execute /c/Users/guest/app.

thanks.

[AlexRouSg]

There is nothing wrong with os.Getwd() and related functions returning a different format other than cosmetics.
You can even run cd C:\\Users\\guest on msys

This is a issue of exec not being able to run programs without the .exe extension.
i.e. it will work if you rename app to app.exe (only the filename, you do not have to change the code)

cc @alexbrainman for windows

[enihcam]

@AlexRouSg i see. thanks.

[seankhliao]

should this be closed as working as intended?

[AlexRouSg]

@seankhliao
No idea if it's intentional

[AlexRouSg]

maybe change the title to: exec: Unable to run programs without .exe extension on windows?

[enihcam]

maybe change the title to: exec: Unable to run programs without .exe extension on windows?

however the app (without .exe) runs under MinGW. i thought Go should be more UNIX-ish? :)

[alexbrainman]

What did you expect to see?

app output

What did you see instead?

exec: "C:\\Users\\guest\\app": file does not exist

@enihcam looks like you are using Cygwin shell.

Go is not supported to run under Cygwin. If you want to run program built with Go for Windows, just use plain Windows.

Alex