Messages in this thread |  | | | Date | Tue, 20 Jun 2006 23:05:31 -0700 | | From | "H. Peter Anvin" <> | | Subject | Re: [patch] sharing maximum errno symbol used in __syscall_return (i386) |
Masatake YAMATO wrote: >>> Hi, >>> >>> __syscall_return in unistd.h is maintained? >>> >>> In the macro the value returned from system call is >>> compared with the maximum error number defined in a header file >>> to know the call is successful or not. However, the maximum error number >>> is hard-coded and is not updated. >>> >> And it's wrong, anyway. It has long been agreed that the maximum errno >> value, for any architecture, is 4095. > > So we should do just: > > > #define GENERIC_ERRNO_MAX 4095 > > Here my patch is proved to be useful for maintaining __syscall_return:-P >
Well, most of the various macros in unistd.h really should go too, since they're mostly underutilized and definitely ill-maintained.
The only one that I know of which is still used by the kernel itself is execve. If so, perhaps we should just have an open-coded execve.
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