From be22b15ae2ff8d7fe06b6e14fddf0c5b444a95da Mon Sep 17 00:00:00 2001 From: rgrimes Date: Fri, 27 May 1994 05:00:24 +0000 Subject: BSD 4.4 Lite Lib Sources --- lib/libc/sys/setuid.2 | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 lib/libc/sys/setuid.2 (limited to 'lib/libc/sys/setuid.2') diff --git a/lib/libc/sys/setuid.2 b/lib/libc/sys/setuid.2 new file mode 100644 index 0000000..383a8f5 --- /dev/null +++ b/lib/libc/sys/setuid.2 @@ -0,0 +1,122 @@ +.\" Copyright (c) 1983, 1991, 1993 +.\" The Regents of the University of California. 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. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" @(#)setuid.2 8.1 (Berkeley) 6/4/93 +.\" +.Dd June 4, 1993 +.Dt SETUID 2 +.Os BSD 4.2 +.Sh NAME +.Nm setuid , +.Nm seteuid , +.Nm setgid , +.Nm setegid , +.Nd set user and group ID +.Sh SYNOPSIS +.Fd #include +.Fd #include +.Ft int +.Fn setuid "uid_t uid" +.Ft int +.Fn seteuid "uid_t euid" +.Ft int +.Fn setgid "gid_t gid" +.Ft int +.Fn setegid "gid_t egid" +.Sh DESCRIPTION +The +.Fn setuid +function +sets the real and effective +user IDs and the saved set-user-ID of the current process +to the specified value. +The +.Fn setuid +function is permitted if the specified ID is equal to the real user ID +of the process, or if the effective user ID is that of the super user. +.Pp +The +.Fn setgid +function +sets the real and effective +group IDs and the saved set-group-ID of the current process +to the specified value. +The +.Fn setgid +function is permitted if the specified ID is equal to the real group ID +of the process, or if the effective user ID is that of the super user. +.Pp +The +.Fn seteuid +function +.Pq Fn setegid +sets the effective user ID (group ID) of the +current process. +The effective user ID may be set to the value +of the real user ID or the saved set-user-ID (see +.Xr intro 2 +and +.Xr execve 2 ) ; +in this way, the effective user ID of a set-user-ID executable +may be toggled by switching to the real user ID, then re-enabled +by reverting to the set-user-ID value. +Similarly, the effective group ID may be set to the value +of the real group ID or the saved set-user-ID. +.Pp +.Sh RETURN VALUES +Upon success, these functions return 0; +otherwise \-1 is returned. +.Pp +If the user is not the super user, or the uid +specified is not the real, effective ID, or saved ID, +these functions return \-1. +.Sh SEE ALSO +.Xr getuid 2 , +.Xr getgid 2 +.Sh STANDARDS +The +.Fn setuid +and +.Fn setgid +functions are compliant with the +.St -p1003.1-88 +specification with +.Li _POSIX_SAVED_IDS +not defined. +The +.Fn seteuid +and +.Fn setegid +functions are extensions based on the +.Tn POSIX +concept of +.Li _POSIX_SAVED_IDS , +and have been proposed for a future revision of the standard. -- cgit v1.1