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Diffstat (limited to 'lib/libc/sys/setregid.2')
-rw-r--r-- | lib/libc/sys/setregid.2 | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libc/sys/setregid.2 b/lib/libc/sys/setregid.2 new file mode 100644 index 0000000..2eedae2 --- /dev/null +++ b/lib/libc/sys/setregid.2 @@ -0,0 +1,90 @@ +.\" Copyright (c) 1980, 1991, 1993, 1994 +.\" 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. +.\" 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. +.\" +.\" @(#)setregid.2 8.2 (Berkeley) 4/16/94 +.\" $FreeBSD$ +.\" +.Dd April 16, 1994 +.Dt SETREGID 2 +.Os +.Sh NAME +.Nm setregid +.Nd set real and effective group ID +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In unistd.h +.Ft int +.Fn setregid "gid_t rgid" "gid_t egid" +.Sh DESCRIPTION +The real and effective group ID's of the current process +are set to the arguments. +If the real group ID is changed, the saved group ID is changed to the +new value of the effective group ID. +.Pp +Unprivileged users may change the real group +ID to the effective group ID and vice-versa; only the super-user may +make other changes. +.Pp +Supplying a value of -1 for either the real or effective +group ID forces the system to substitute the current +ID in place of the -1 argument. +.Pp +The +.Fn setregid +system call was intended to allow swapping +the real and effective group IDs +in set-group-ID programs to temporarily relinquish the set-group-ID value. +This system call did not work correctly, +and its purpose is now better served by the use of the +.Xr setegid 2 +system call. +.Pp +When setting the real and effective group IDs to the same value, +the standard +.Fn setgid +system call is preferred. +.Sh RETURN VALUES +.Rv -std setregid +.Sh ERRORS +.Bl -tag -width Er +.It Bq Er EPERM +The current process is not the super-user and a change +other than changing the effective group-id to the real group-id +was specified. +.El +.Sh SEE ALSO +.Xr getgid 2 , +.Xr issetugid 2 , +.Xr setegid 2 , +.Xr setgid 2 , +.Xr setuid 2 +.Sh HISTORY +The +.Fn setregid +system call appeared in +.Bx 4.2 . |