diff options
| author | Jing Chen <chjing@google.com> | 2020-11-02 23:56:29 -0800 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-11-02 23:58:45 -0800 |
| commit | 1a3f417f4a329339d89fcf89262bd08c18c1f27e (patch) | |
| tree | 54d28b81f22b29ac979308b3cf7e642145916d2e /pkg/sentry/syscalls/linux/sys_sem.go | |
| parent | 1321f837bd9f082e3c1b0a37831453b3637202c3 (diff) | |
Implement command GETZCNT for semctl.
PiperOrigin-RevId: 340389884
Diffstat (limited to 'pkg/sentry/syscalls/linux/sys_sem.go')
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_sem.go | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_sem.go b/pkg/sentry/syscalls/linux/sys_sem.go index c2d4bf805..067f6be6d 100644 --- a/pkg/sentry/syscalls/linux/sys_sem.go +++ b/pkg/sentry/syscalls/linux/sys_sem.go @@ -138,12 +138,15 @@ func Semctl(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscal return 0, nil, err + case linux.GETZCNT: + v, err := getSemzcnt(t, id, num) + return uintptr(v), nil, err + case linux.IPC_INFO, linux.SEM_INFO, linux.SEM_STAT, linux.SEM_STAT_ANY, - linux.GETNCNT, - linux.GETZCNT: + linux.GETNCNT: t.Kernel().EmitUnimplementedEvent(t) fallthrough @@ -258,3 +261,13 @@ func getPID(t *kernel.Task, id int32, num int32) (int32, error) { } return int32(tg.ID()), nil } + +func getSemzcnt(t *kernel.Task, id int32, num int32) (uint16, error) { + r := t.IPCNamespace().SemaphoreRegistry() + set := r.FindByID(id) + if set == nil { + return 0, syserror.EINVAL + } + creds := auth.CredentialsFromContext(t) + return set.GetZeroWaiters(num, creds) +} |