#include <spawn.h>
+#include <errno.h>
int posix_spawnattr_setflags(posix_spawnattr_t *attr, short flags)
{
+ const unsigned all_flags =
+ POSIX_SPAWN_RESETIDS |
+ POSIX_SPAWN_SETPGROUP |
+ POSIX_SPAWN_SETSIGDEF |
+ POSIX_SPAWN_SETSIGMASK |
+ POSIX_SPAWN_SETSCHEDPARAM |
+ POSIX_SPAWN_SETSCHEDULER |
+ POSIX_SPAWN_USEVFORK |
+ POSIX_SPAWN_SETSID;
+ if (flags & ~all_flags) return EINVAL;
attr->__flags = flags;
return 0;
}