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authorpeter <peter@FreeBSD.org>1997-03-31 15:59:14 +0000
committerpeter <peter@FreeBSD.org>1997-03-31 15:59:14 +0000
commitf551f7b0a0f8da3cbf8c5e92356ec03ca8003ac4 (patch)
tree1fd7b427f9761c9a3701cfb7320cd5b5f930698b /lib/libc/sys/issetugid.2
parenta3b55ed48c23a0f4f5089da84037346e6250643d (diff)
downloadFreeBSD-src-f551f7b0a0f8da3cbf8c5e92356ec03ca8003ac4.zip
FreeBSD-src-f551f7b0a0f8da3cbf8c5e92356ec03ca8003ac4.tar.gz
Steal issetugid man page from OpenBSD. Needs work..
Obtained from: OpenBSD
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+.\" $OpenBSD: issetugid.2,v 1.7 1997/02/18 00:16:09 deraadt Exp $
+.\"
+.\" Copyright (c) 1980, 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.
+.\"
+.Dd August, 25 1996
+.Dt ISSETUGID 2
+.Os OpenBSD 2.0
+.Sh NAME
+.Nm issetugid
+.Nd is current executable running setuid or setgid
+.Sh SYNOPSIS
+.Fd #include <unistd.h>
+.Ft int
+.Fn issetugid void
+.Sh DESCRIPTION
+The
+.Fn issetugid
+function returns 1 if the process was made setuid or setgid as
+the result of the last
+.Fn execve
+system call.
+Otherwise it returns 0.
+.Pp
+This system call exists so that library routines (inside libc, libtermlib,
+or other libraries) can gaurantee safe behavior when used inside
+setuid or setgid programs.
+Some library routines may not be passed sufficient information to know
+if the current program was started setuid or setgid because higher level
+calling code may have made changes to the uid or the euid.
+In particular, it is wise to use this call to determine if a
+pathname returned from a
+.Fn getenv
+call may safely be used to
+.Fn open
+the specified file.
+.Pp
+.Fn issetugid
+is unaffected by calls to
+.Fn setuid ,
+.Fn fork ,
+and other such calls. It is only controlled by
+.Fn execve .
+.Sh ERRORS
+The
+.Fn issetugid
+function is always successful, and no return value is reserved to
+indicate an error.
+.Sh SEE ALSO
+.Xr execve 2 ,
+.Xr setuid 2 ,
+.Xr seteuid 2,
+.Xr setgid 2 ,
+.Xr setegid 2
+.Sh HISTORY
+A
+.Fn lstat
+function call appeared in
+OpenBSD 2.0
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