Mail Archives: cygwin/2005/02/02/09:09:15
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According to Corinna Vinschen on 2/2/2005 3:07 AM:
> This is newlib schtuff, so I CCd the newlib mailing list.
> [Resend because I forgot the CC]
>
> On Feb 1 20:58, Erik Blake wrote:
Eric, not Erik.
>
> include/pwd.h is a newlib file. However, I was pretty happy that pw_uid
> and pw_gid were defined as int, when we changed uids and gids from 16 to
> 32 bits. It was the one file which wasn't necessary to change.
Is it worth introducing two definitions in cygwin, guarded by
__CYGWIN_USE_BIG_TYPES__, as is done elsewhere (for example sys/dirent.h)?
Or how about something like the following to ensure that pw_comment
remains at the same offset regardless of whether sizeof(uid_t) == sizeof(int):
struct passwd {
char *pw_name;
char *pw_passwd;
union {
int __filler;
uid_t upw_uid;
} u;
/* etc. */
};
#define pw_uid u.upw_uid;
>
> We could just redefine struct passwd to use uid_t and gid_t, but this
> would break (very very very very unlikely) builds of Cygwin using
> sources of versions before 1.5.0. In other words, old Cygwin sources
> using 16 bit uids/gids would go down hell.
>
> Personally, I think I can live with that, but I would like to hear if
> there's any good reason to build historic versions (say, b20) with a
> recent newlib.
I don't think so. Anyone brave enough to want to build something that old
should build a complete system from sources from that time, rather than
mixing and matching old cygwin with newer newlib.
- --
Life is short - so eat dessert first!
Eric Blake ebb9 AT byu DOT net
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