Linux supports a system call fsuid. Unlike setuid, which grants the user all the rights of the

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Linux supports a system call fsuid. Unlike setuid, which grants the user all the rights of the effective id associated with a program he is running, fsuid grants the user who is running the program special rights only with respect to access to files. Why is this feature useful?
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Modern Operating Systems

ISBN: 978-0133591620

4th edition

Authors: Andrew S. Tanenbaum, Herbert Bos

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