CODEWITHSUNDEEP
gosystem-callsuname
waitingkuo
waitingkuo

Reputation: 93934

Cannot get Uname by golang

I'm using golang 1.4.2 on Mac

I want to use Uname to get some information, followings are my codes:

package main

import (
  "syscall"
)

func main() {
  utsname := syscall.Utsname{}
  syscall.Uname(&utsname)
}

But I got these errors:

# command-line-arguments
./main.go:8: undefined: syscall.Utsname
./main.go:9: undefined: syscall.Uname

Any went wrong?

Upvotes: 2

Views: 5182

Answers (2)

Debosmit Ray
Debosmit Ray

Reputation: 5413

(Adding a more direct answer with exactly how I got past this problem)

Instead of importing syscall, I imported golang.org/x/sys/unix.

Then, the following code-block:

u := syscall.Utsname{}
syscall.Uname(&u)

is replaced by:

u := unix.Utsname{}
unix.Uname(&u)

NOTE! You need to call relevant functions for Windows.

Relevant contents of git diff:

-       "syscall"
+       "golang.org/x/sys/unix"

-       utsname := syscall.Utsname{}
-       syscall.Uname(&utsname)
+       utsname := unix.Utsname{}
+       unix.Uname(&utsname)

Upvotes: 2

Leo Correa
Leo Correa

Reputation: 19829

TL;DR Uname and Utsname are not available for OSX.

The reason is because those functions are not defined for the operating system.

Reading the documentation for syscall this jumped at me:

The details vary depending on the underlying system, and by default, godoc will display the syscall documentation for the current system. If you want godoc to display syscall documentation for another system, set $GOOS and $GOARCH to the desired system.

Running godoc syscall on my Mac yielded the sycall documentation which does not include the Utsname type nor the Uname function call.

However, running GOOS=linux GOARCH=amd64 godoc syscall actually shows the Utsname and Uname.

Also, note that the package itself is locked down in favor of OS specific packages

https://golang.org/pkg/syscall/ => https://godoc.org/golang.org/x/sys

Upvotes: 8

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