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NetBSD 6.1.5 - man page for do_setresuid (netbsd section 9)

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DO_SETRESUID(9) 		  BSD Kernel Developer's Manual 		  DO_SETRESUID(9)

NAME
     do_setresuid, do_setresgid -- set process uid and gid

SYNOPSIS
     #include <sys/ucred.h>

     int
     do_setresuid(struct lwp *lwp, uid_t ruid, uid_t euid, uid_t svuid, u_int flags);

     int
     do_setresgid(struct lwp *lwp, uid_t ruid, uid_t euid, uid_t svuid, u_int flags);

DESCRIPTION
     The do_setresuid and do_setresgid functions are used to implement the various system calls
     that allow a process to change its real, effective, and saved uid and gid values.

     The do_setresuid function sets the specified processes real user ID to ruid, its effective
     user ID to euid, and its saved user ID to svuid.  If any of the uid arguments are -1 then
     that assignment is skipped.

     If suser() is true, then any values may be assigned, otherwise the new uid values must match
     one of the existing values and the caller must have set the relevant bit in flags.

     The flags argument specifies which of the existing uid values the new value must match.  It
     should be set to a logical OR of ID_{R,E,S}_EQ_{R,E,S}, where ID_E_EQ_R means that it is
     valid to set the effective ID to the current value of the real ID.

     The do_setresgid function sets the group IDs but otherwise behaves in the same manner as
     do_setresuid.  The processes group list is neither examined nor effected.

SEE ALSO
     setregid(2), setreuid(2), setuid(2), suser(9)

CODE REFERENCES
     These functions are implemented in: sys/kern/kern_prot.c.

HISTORY
     Implemented for NetBSD 2.0 to replace ad-hoc code in each system call routine and in the
     various compat modules.

BSD					September 28, 2003				      BSD
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