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-.\" Copyright (c) 2000
-.\" Sheldon Hearn. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES
-.\"
-.\" $FreeBSD$
-.\"
-.Dd February 7, 2015
-.Dt SETRESUID 2
-.Os
-.Sh NAME
-.Nm getresgid ,
-.Nm getresuid ,
-.Nm setresgid ,
-.Nm setresuid
-.Nd "get or set real, effective and saved user or group ID"
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/types.h
-.In unistd.h
-.Ft int
-.Fn getresgid "gid_t *rgid" "gid_t *egid" "gid_t *sgid"
-.Ft int
-.Fn getresuid "uid_t *ruid" "uid_t *euid" "uid_t *suid"
-.Ft int
-.Fn setresgid "gid_t rgid" "gid_t egid" "gid_t sgid"
-.Ft int
-.Fn setresuid "uid_t ruid" "uid_t euid" "uid_t suid"
-.Sh DESCRIPTION
-The
-.Fn setresuid
-system call sets the real,
-effective and saved user IDs of the current process.
-The analogous
-.Fn setresgid
-sets the real, effective and saved group IDs.
-.Pp
-Privileged processes may set these IDs
-to arbitrary values.
-Unprivileged processes are restricted
-in that each of the new IDs must match one of the current IDs.
-.Pp
-Passing -1 as an argument causes the corresponding value
-to remain unchanged.
-.Pp
-The
-.Fn getresgid
-and
-.Fn getresuid
-calls retrieve the real, effective, and saved group and user IDs of
-the current process, respectively.
-.Sh RETURN VALUES
-.Rv -std
-.Sh ERRORS
-.Bl -tag -width Er
-.It Bq Er EPERM
-The calling process was not privileged
-and tried to change one or more IDs to a value
-which was not the current real ID, the current effective ID
-nor the current saved ID.
-.It Bq Er EFAULT
-An address passed to
-.Fn getresgid
-or
-.Fn getresuid
-was invalid.
-.El
-.Sh SEE ALSO
-.Xr getegid 2 ,
-.Xr geteuid 2 ,
-.Xr getgid 2 ,
-.Xr getuid 2 ,
-.Xr issetugid 2 ,
-.Xr setgid 2 ,
-.Xr setregid 2 ,
-.Xr setreuid 2 ,
-.Xr setuid 2
-.Sh HISTORY
-These functions first appeared in HP-UX.