From The Stevens Book: 'If _POSIX_CHOWN_RESTRICTED is in effect for the specified file, then: 1. only a superuser process can change the user ID of the file; 2. a nonsuperuser process can change the group ID of the file if a. the process owns the file (the effective user ID equals the user ID of the file and, b. *owner* equals the user ID of the file and *group* equals either the effective group ID of the process or one of the process's supplementary group IDs.
This means that when _POSIX_CHOWN_RESTRICTED is in effect you can't change the user ID of other user's file. You can change the group ID of files you own, but only to groups you below to." From /usr/include/bits/posix_opt.h on my FC1 machine: #define _POSIX_CHOWN_RESTRICTED 1 Hope this helps. Ken -- "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."--Benjamin Franklin " 'Necessity' is the plea for every infringement of human liberty; it is the argument of tyrants; it is the creed of slaves."--William Pitt
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