diff options
Diffstat (limited to 'src/runtime/sys_darwin.go')
| -rw-r--r-- | src/runtime/sys_darwin.go | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/runtime/sys_darwin.go b/src/runtime/sys_darwin.go index 88af894409..03a2294e5e 100644 --- a/src/runtime/sys_darwin.go +++ b/src/runtime/sys_darwin.go @@ -382,8 +382,13 @@ func sysctlbyname_trampoline() //go:nosplit //go:cgo_unsafe_args -func fcntl(fd, cmd, arg int32) int32 { - return libcCall(unsafe.Pointer(abi.FuncPCABI0(fcntl_trampoline)), unsafe.Pointer(&fd)) +func fcntl(fd, cmd, arg int32) (ret int32, errno int32) { + args := struct { + fd, cmd, arg int32 + ret, errno int32 + }{fd, cmd, arg, 0, 0} + libcCall(unsafe.Pointer(abi.FuncPCABI0(fcntl_trampoline)), unsafe.Pointer(&args)) + return args.ret, args.errno } func fcntl_trampoline() @@ -485,8 +490,10 @@ func closeonexec(fd int32) { //go:nosplit func setNonblock(fd int32) { - flags := fcntl(fd, _F_GETFL, 0) - fcntl(fd, _F_SETFL, flags|_O_NONBLOCK) + flags, _ := fcntl(fd, _F_GETFL, 0) + if flags != -1 { + fcntl(fd, _F_SETFL, flags|_O_NONBLOCK) + } } // Tell the linker that the libc_* functions are to be found |