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Setgid

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(changing setgid and seteuid to redirect to setuid)
 
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[[setgid]] (and it's brothers, [[setuid]] and [[seteuid]]) are all system calls that a program can use to change the group ID, user ID and effective user ID (respectively.)
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#REDIRECT [[Setuid]]
 
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From the man page for setuid:
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    The setuid() system call sets the real and effective user IDs and the
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    saved set-user-ID of the current process to the specified value.  The
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    setuid() system call is permitted if the specified ID is equal to the
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    real user ID or the effective user ID of the process, or if the effective
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    user ID is that of the super user.
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    The setgid() system call sets the real and effective group IDs and the
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    saved set-group-ID of the current process to the specified value.  The
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    setgid() system call is permitted if the specified ID is equal to the
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    real group ID or the effective group ID of the process, or if the effec-
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    tive user ID is that of the super user.
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    The seteuid() system call (setegid()) sets the effective user ID (group
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    ID) of the current process.  The effective user ID may be set to the
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    value of the real user ID or the saved set-user-ID (see intro(2) and
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    execve(2)); in this way, the effective user ID of a set-user-ID exe-
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    cutable may be toggled by switching to the real user ID, then re-enabled
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    by reverting to the set-user-ID value.  Similarly, the effective group ID
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    may be set to the value of the real group ID or the saved set-group-ID.
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See also http://setuid.org/
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[[Category:FreeBSD Terminology]]
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Latest revision as of 12:11, 16 March 2005

  1. REDIRECT Setuid
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