[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: euidaccessat [Re: one more openat-style function required: fchmodat
From: |
Jim Meyering |
Subject: |
Re: euidaccessat [Re: one more openat-style function required: fchmodat |
Date: |
Thu, 05 Jan 2006 14:38:13 +0100 |
Roland McGrath <address@hidden> wrote:
> Is Solaris eaccess the same as euidaccess?
Yes. Irix and FreeBSD have eaccess, too.
> Should glibc provide eaccess as
> an alias for euidaccess?
Good idea.
> Except on the Hurd, euidaccess actually either just uses access (when r==e)
> or uses stat and the usual st_mode rules assuming those are what the
> filesystem will actually use, which you can do yourself. rm et al I expect
> are never setuid and so can always use the method of calling access, which
I admit it is very unlikely that anyone will ever find
a use for an rm binary with the set-UID bit set.
However, rm might easily be invoked from a set-UID
program or script, and using access(2) in that context
would be wrong.
> is superior in telling truth about permission, but lacks the *at features.
>
> In keeping with the other interfaces, it should be faccessat and use a new
> AT_* flag bit to distinguish real-user from effective-user access checking.
>
> int faccessat (int fd, const char *file, int type, int flag);
>
> Does that sound reasonable?
That sounds fine.
Thanks!