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A Unix process may call another process without fully trusting it. In this situation, the caller may want the called process to have access only to the objects that the caller explicitly passes to it, and not to arbitrary files owned by the caller. One possible solution is to create a restricted user ID, and execute the called process under this restricted UID. Every UNIX process has a Real UID (RUID) and an Effective UID (EUID). What is the difference between the RUID and the EUID? How is each one used by the OS?

A Unix process may call another process without fully trusting it. In this situation, the caller may want the called process to have access only to the objects that the caller explicitly passes to it, and not to arbitrary files owned by the caller. One possible solution is to create a restricted user ID, and execute the called process under this restricted UID. Every UNIX process has a Real UID (RUID) and an Effective UID (EUID). What is the difference between the RUID and the EUID? How is each one used by the OS?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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A Unix process may call another process without fully trusting it. In this situation, the caller may want the called process to have access only to the objects that the caller explicitly passes to it, and not to arbitrary files owned by the caller. One possible solution is to create a restricted user ID, and execute the called process under this restricted UID.

Every UNIX process has a Real UID (RUID) and an Effective UID (EUID). What is the difference between the RUID and the EUID? How is each one used by the OS?

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