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unix: add Uname on FreeBSD

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FreeBSD doesn't have a uname syscall but the information can be
retrieved using sysctls the same way as on Darwin.

Change-Id: I824c42490d1feed3f1ad3823427c01dd3e5ea3c1
Reviewed-on: https://go-review.googlesource.com/79918
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Tobias Klauser
2017-11-27 18:31:15 +00:00
committed by Tobias Klauser
parent 4ff8c001ce
commit 096928d58b
9 changed files with 106 additions and 0 deletions
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unix/syscall_freebsd.go
+46
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@@ -396,6 +396,52 @@ func IoctlGetTermios(fd int, req uint) (*Termios, error) {
return &value, err
}
func Uname(uname *Utsname) error {
mib := []_C_int{CTL_KERN, KERN_OSTYPE}
n := unsafe.Sizeof(uname.Sysname)
if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
return err
}
mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
n = unsafe.Sizeof(uname.Nodename)
if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
return err
}
mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
n = unsafe.Sizeof(uname.Release)
if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
return err
}
mib = []_C_int{CTL_KERN, KERN_VERSION}
n = unsafe.Sizeof(uname.Version)
if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
return err
}
// The version might have newlines or tabs in it, convert them to
// spaces.
for i, b := range uname.Version {
if b == '\n' || b == '\t' {
if i == len(uname.Version)-1 {
uname.Version[i] = 0
} else {
uname.Version[i] = ' '
}
}
}
mib = []_C_int{CTL_HW, HW_MACHINE}
n = unsafe.Sizeof(uname.Machine)
if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
return err
}
return nil
}
/*
* Exposed directly
*/