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unix: add Uname on Darwin

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Darwin doesn't have a uname syscall but the same information can be
retrieved using sysctls. Use the raw sysctl numbers instead of doing the
roundtrip via SysctlString in order to void the additional sysctl calls
in nametomib and SysctlRaw.

This implementation follows the one in
https://opensource.apple.com/source/Libc/Libc-1244.1.7/gen/uname.c

Change-Id: I19541e2a6700f84ced0549a8fb86faa8cb5e6fbe
Reviewed-on: https://go-review.googlesource.com/77270
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Tobias Klauser
2017-11-13 13:29:10 +01:00
committed by Brad Fitzpatrick
parent 1e2299c37c
commit 665f6529cc
11 changed files with 115 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
unix/mkerrors.sh
View File

@@ -48,6 +48,7 @@ includes_Darwin='
#include <sys/sysctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <net/bpf.h>
#include <net/if.h>
@@ -386,7 +387,9 @@ ccflags="$@"
$2 == "SOMAXCONN" ||
$2 == "NAME_MAX" ||
$2 == "IFNAMSIZ" ||
$2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ ||
$2 ~ /^CTL_(HW|KERN|MAXNAME|NET|QUERY)$/ ||
$2 ~ /^KERN_(HOSTNAME|OS(RELEASE|TYPE)|VERSION)$/ ||
$2 ~ /^HW_MACHINE$/ ||
$2 ~ /^SYSCTL_VERS/ ||
$2 ~ /^(MS|MNT|UMOUNT)_/ ||
$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||

46
unix/syscall_darwin.go
View File

@@ -270,6 +270,52 @@ 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
*/

5
unix/types_darwin.go
View File

@@ -39,6 +39,7 @@ package unix
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <net/bpf.h>
#include <net/if.h>
@@ -270,3 +271,7 @@ const (
POLLWRBAND = C.POLLWRBAND
POLLWRNORM = C.POLLWRNORM
)
// uname
type Utsname C.struct_utsname

7
unix/zerrors_darwin_386.go
View File

@@ -249,6 +249,8 @@ const (
CSTOP = 0x13
CSTOPB = 0x400
CSUSP = 0x1a
CTL_HW = 0x6
CTL_KERN = 0x1
CTL_MAXNAME = 0xc
CTL_NET = 0x4
DLT_A429 = 0xb8
@@ -532,6 +534,7 @@ const (
F_VOLPOSMODE = 0x4
F_WRLCK = 0x3
HUPCL = 0x4000
HW_MACHINE = 0x1
ICANON = 0x100
ICMP6_FILTER = 0x12
ICRNL = 0x100
@@ -878,6 +881,10 @@ const (
IXANY = 0x800
IXOFF = 0x400
IXON = 0x200
KERN_HOSTNAME = 0xa
KERN_OSRELEASE = 0x2
KERN_OSTYPE = 0x1
KERN_VERSION = 0x4
LOCK_EX = 0x2
LOCK_NB = 0x4
LOCK_SH = 0x1

7
unix/zerrors_darwin_amd64.go
View File

@@ -249,6 +249,8 @@ const (
CSTOP = 0x13
CSTOPB = 0x400
CSUSP = 0x1a
CTL_HW = 0x6
CTL_KERN = 0x1
CTL_MAXNAME = 0xc
CTL_NET = 0x4
DLT_A429 = 0xb8
@@ -532,6 +534,7 @@ const (
F_VOLPOSMODE = 0x4
F_WRLCK = 0x3
HUPCL = 0x4000
HW_MACHINE = 0x1
ICANON = 0x100
ICMP6_FILTER = 0x12
ICRNL = 0x100
@@ -878,6 +881,10 @@ const (
IXANY = 0x800
IXOFF = 0x400
IXON = 0x200
KERN_HOSTNAME = 0xa
KERN_OSRELEASE = 0x2
KERN_OSTYPE = 0x1
KERN_VERSION = 0x4
LOCK_EX = 0x2
LOCK_NB = 0x4
LOCK_SH = 0x1

7
unix/zerrors_darwin_arm.go
View File

@@ -249,6 +249,8 @@ const (
CSTOP = 0x13
CSTOPB = 0x400
CSUSP = 0x1a
CTL_HW = 0x6
CTL_KERN = 0x1
CTL_MAXNAME = 0xc
CTL_NET = 0x4
DLT_A429 = 0xb8
@@ -532,6 +534,7 @@ const (
F_VOLPOSMODE = 0x4
F_WRLCK = 0x3
HUPCL = 0x4000
HW_MACHINE = 0x1
ICANON = 0x100
ICMP6_FILTER = 0x12
ICRNL = 0x100
@@ -878,6 +881,10 @@ const (
IXANY = 0x800
IXOFF = 0x400
IXON = 0x200
KERN_HOSTNAME = 0xa
KERN_OSRELEASE = 0x2
KERN_OSTYPE = 0x1
KERN_VERSION = 0x4
LOCK_EX = 0x2
LOCK_NB = 0x4
LOCK_SH = 0x1

7
unix/zerrors_darwin_arm64.go
View File

@@ -249,6 +249,8 @@ const (
CSTOP = 0x13
CSTOPB = 0x400
CSUSP = 0x1a
CTL_HW = 0x6
CTL_KERN = 0x1
CTL_MAXNAME = 0xc
CTL_NET = 0x4
DLT_A429 = 0xb8
@@ -532,6 +534,7 @@ const (
F_VOLPOSMODE = 0x4
F_WRLCK = 0x3
HUPCL = 0x4000
HW_MACHINE = 0x1
ICANON = 0x100
ICMP6_FILTER = 0x12
ICRNL = 0x100
@@ -878,6 +881,10 @@ const (
IXANY = 0x800
IXOFF = 0x400
IXON = 0x200
KERN_HOSTNAME = 0xa
KERN_OSRELEASE = 0x2
KERN_OSTYPE = 0x1
KERN_VERSION = 0x4
LOCK_EX = 0x2
LOCK_NB = 0x4
LOCK_SH = 0x1

8
unix/ztypes_darwin_386.go
View File

@@ -479,3 +479,11 @@ const (
POLLWRBAND = 0x100
POLLWRNORM = 0x4
)
type Utsname struct {
Sysname [256]byte
Nodename [256]byte
Release [256]byte
Version [256]byte
Machine [256]byte
}

8
unix/ztypes_darwin_amd64.go
View File

@@ -489,3 +489,11 @@ const (
POLLWRBAND = 0x100
POLLWRNORM = 0x4
)
type Utsname struct {
Sysname [256]byte
Nodename [256]byte
Release [256]byte
Version [256]byte
Machine [256]byte
}

8
unix/ztypes_darwin_arm.go
View File

@@ -480,3 +480,11 @@ const (
POLLWRBAND = 0x100
POLLWRNORM = 0x4
)
type Utsname struct {
Sysname [256]byte
Nodename [256]byte
Release [256]byte
Version [256]byte
Machine [256]byte
}

8
unix/ztypes_darwin_arm64.go
View File

@@ -489,3 +489,11 @@ const (
POLLWRBAND = 0x100
POLLWRNORM = 0x4
)
type Utsname struct {
Sysname [256]byte
Nodename [256]byte
Release [256]byte
Version [256]byte
Machine [256]byte
}