Messages in this thread | | | Date | Tue, 24 Nov 1998 18:19:44 +0100 | From | Pavel Machek <> | Subject | Re: High UID support for Linux |
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Hi!
> Your real problems will be system calls. There isn't enough space in > some of the structs. Sign extension and trunctuation will cause great > trouble. > > The system call problem is easy; we simply create new system calls that > return new structures, and let glibc handle the problem of deciding > whether or not the new system calls are present. The structure which > glibc exports to the user applications fortunately already supports > 32-bit uid's.
This would mean new stat() system call, would not it? You probably want to extend st_size to 64 bits and maybe even expand st_rdev. Talk to jj@sunsite.ms.mff.cuni.cz, he already did some of this.
> The only problem them would be for people using libc5 or a.out > libraries. They would simply not be able to take advantage of > 16bit > uids on their system.
...which does not hurt that much...
Pavel -- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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