unix: suppress ENOMEM errors from sysctl's implementing Uname(uname *Utsname) on FreeBSD due to truncated fields.
Fixes golang/go#65585.
Change-Id: I7e529eaef224be977e3b0c20d071802f49b297e7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/562617
Reviewed-by: Than McIntosh <thanm@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
diff --git a/unix/syscall_freebsd.go b/unix/syscall_freebsd.go
index 64d1bb4..2b57e0f 100644
--- a/unix/syscall_freebsd.go
+++ b/unix/syscall_freebsd.go
@@ -13,6 +13,7 @@
package unix
import (
+ "errors"
"sync"
"unsafe"
)
@@ -169,25 +170,26 @@
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 {
+ // Suppress ENOMEM errors to be compatible with the C library __xuname() implementation.
+ if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
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 {
+ if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
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 {
+ if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
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 {
+ if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
return err
}
@@ -205,7 +207,7 @@
mib = []_C_int{CTL_HW, HW_MACHINE}
n = unsafe.Sizeof(uname.Machine)
- if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
+ if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil && !errors.Is(err, ENOMEM) {
return err
}