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unix: suppress ENOMEM errors from sysctl's implementing Uname(uname *Utsname) on FreeBSD due to truncated fields.

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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>
This commit is contained in:
Yuval Pavel Zholkover
2024-02-10 17:32:14 +02:00
committed by Gopher Robot
parent 2f2cc5dae4
commit 6b4eab51c2
1 changed files with 7 additions and 5 deletions
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12
unix/syscall_freebsd.go
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@@ -13,6 +13,7 @@
package unix
import (
"errors"
"sync"
"unsafe"
)
@@ -169,25 +170,26 @@ func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
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 @@ func Uname(uname *Utsname) error {
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
}