 | | In addition to the real, effective, and saved user IDs, the operating system also associates with each process a real group ID number, an effective group ID number, and a saved group ID number. These values are also used to determine a process' access permissions, although they only affect the ability to access files (the user-id is also used to determine permissions to execute certain system calls, and for accounting purposes). An analogous set of functions lets you manipulate the group ID: | |
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