93 lines
3.2 KiB
Groff
93 lines
3.2 KiB
Groff
.\" $NetBSD: do_setresuid.9,v 1.7 2017/10/17 21:11:36 pgoyette Exp $
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.\"
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.\"-
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.\" Copyright (c) 2003 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by David Laight.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd September 28, 2003
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.Dt DO_SETRESUID 9
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.Os
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.Sh NAME
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.Nm do_setresuid ,
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.Nm do_setresgid
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.Nd set process uid and gid
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.Sh SYNOPSIS
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.In sys/ucred.h
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.Ft int
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.Fn do_setresuid "struct lwp *lwp" "uid_t ruid" "uid_t euid" "uid_t svuid" "u_int flags"
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.Ft int
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.Fn do_setresgid "struct lwp *lwp" "uid_t ruid" "uid_t euid" "uid_t svuid" "u_int flags"
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.Sh DESCRIPTION
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The
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.Nm do_setresuid
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and
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.Nm do_setresgid
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functions are used to implement the various system calls that allow a
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process to change its real, effective, and saved uid and gid values.
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.Pp
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The
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.Nm do_setresuid
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function sets the specified process's real user ID to
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.Ar ruid ,
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its effective user ID to
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.Ar euid ,
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and its saved user ID to
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.Ar svuid .
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If any of the uid arguments are \-1 then that assignment is skipped.
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.Pp
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If
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.Fn suser
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is true, then any values may be assigned, otherwise the new uid
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values must match one of the existing values and the caller must have
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set the relevant bit in
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.Ar flags .
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.Pp
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The
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.Ar flags
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argument specifies which of the existing uid values the new value must match.
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It should be set to a logical OR of ID_{R,E,S}_EQ_{R,E,S}, where ID_E_EQ_R
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means that it is valid to set the effective ID to the current value of the
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real ID.
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.Pp
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The
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.Nm do_setresgid
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function sets the group IDs but otherwise behaves in the same manner as
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.Nm .
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The processes group list is neither examined nor effected.
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.Sh CODE REFERENCES
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These functions are implemented in:
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.Pa sys/kern/kern_prot.c .
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.Sh SEE ALSO
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.Xr setregid 2 ,
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.Xr setreuid 2 ,
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.Xr setuid 2
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.Sh HISTORY
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Implemented for
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.Nx 2.0
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to replace ad-hoc code in each system call routine and in the
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various compat modules.
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