mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-14 06:12:01 +01:00
8269e7673c
Remove core system call implementations and documentation to lib/libsys and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>. Update paths to allow libc to find them in their new home. Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
102 lines
3.1 KiB
Groff
102 lines
3.1 KiB
Groff
.\" Copyright (c) 1983, 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.
|
|
.\" 3. 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 January 19, 2018
|
|
.Dt SETGROUPS 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm setgroups
|
|
.Nd set group access list
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In unistd.h
|
|
.Ft int
|
|
.Fn setgroups "int ngroups" "const gid_t *gidset"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn setgroups
|
|
system call
|
|
sets the group access list of the current user process
|
|
according to the array
|
|
.Fa gidset .
|
|
The
|
|
.Fa ngroups
|
|
argument
|
|
indicates the number of entries in the array and must be no
|
|
more than
|
|
.Dv {NGROUPS_MAX}+1 .
|
|
.Pp
|
|
Only the super-user may set a new group list.
|
|
.Pp
|
|
The first entry of the group array
|
|
.Pq Va gidset[0]
|
|
is used as the effective group-ID for the process.
|
|
This entry is over-written when a setgid program is run.
|
|
To avoid losing access to the privileges of the
|
|
.Va gidset[0]
|
|
entry, it should be duplicated later in the group array.
|
|
By convention,
|
|
this happens because the group value indicated
|
|
in the password file also appears in
|
|
.Pa /etc/group .
|
|
The group value in the password file is placed in
|
|
.Va gidset[0]
|
|
and that value then gets added a second time when the
|
|
.Pa /etc/group
|
|
file is scanned to create the group set.
|
|
.Sh RETURN VALUES
|
|
.Rv -std setgroups
|
|
.Sh ERRORS
|
|
The
|
|
.Fn setgroups
|
|
system call will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EPERM
|
|
The caller is not the super-user.
|
|
.It Bq Er EINVAL
|
|
The number specified in the
|
|
.Fa ngroups
|
|
argument is larger than the
|
|
.Dv {NGROUPS_MAX}+1
|
|
limit.
|
|
.It Bq Er EFAULT
|
|
The address specified for
|
|
.Fa gidset
|
|
is outside the process
|
|
address space.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr getgroups 2 ,
|
|
.Xr initgroups 3
|
|
.Sh HISTORY
|
|
The
|
|
.Fn setgroups
|
|
system call appeared in
|
|
.Bx 4.2 .
|