1SETUID(2)                     System Calls Manual                    SETUID(2)
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NAME

6       setuid, setgid - set user and group ID
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SYNOPSIS

9       setuid(uid)
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11       setgid(gid)
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DESCRIPTION

14       The  user  ID (group ID) of the current process is set to the argument.
15       Both the effective and the real ID are set.  These calls are only  per‐
16       mitted to the super-user or if the argument is the real ID.
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SEE ALSO

19       getuid(2)
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DIAGNOSTICS

22       Zero  is  returned if the user (group) ID is set; -1 is returned other‐
23       wise.
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ASSEMBLER

26       (setuid = 23.)
27       (user ID in r0)
28       sys setuid
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30       (setgid = 46.)
31       (group ID in r0)
32       sys setgid
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36                                                                     SETUID(2)