mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
![Brooks Davis](/assets/img/avatar_default.png)
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
219 lines
5.7 KiB
Groff
219 lines
5.7 KiB
Groff
.\" Copyright (c) 2016 Eric Badger
|
|
.\" 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 (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 September 14, 2016
|
|
.Dt RCTL_ADD_RULE 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm rctl_add_rule ,
|
|
.Nm rctl_get_limits ,
|
|
.Nm rctl_get_racct ,
|
|
.Nm rctl_get_rules ,
|
|
.Nm rctl_remove_rule
|
|
.Nd manipulate and query the resource limits database
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/rctl.h
|
|
.Ft int
|
|
.Fo rctl_add_rule
|
|
.Fa "const char *inbufp" "size_t inbuflen" "char *outbufp" "size_t outbuflen"
|
|
.Fc
|
|
.Ft int
|
|
.Fo rctl_get_limits
|
|
.Fa "const char *inbufp" "size_t inbuflen" "char *outbufp" "size_t outbuflen"
|
|
.Fc
|
|
.Ft int
|
|
.Fo rctl_get_racct
|
|
.Fa "const char *inbufp" "size_t inbuflen" "char *outbufp" "size_t outbuflen"
|
|
.Fc
|
|
.Ft int
|
|
.Fo rctl_get_rules
|
|
.Fa "const char *inbufp" "size_t inbuflen" "char *outbufp" "size_t outbuflen"
|
|
.Fc
|
|
.Ft int
|
|
.Fo rctl_remove_rule
|
|
.Fa "const char *inbufp" "size_t inbuflen" "char *outbufp" "size_t outbuflen"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
These system calls are used to manipulate and query the resource limits
|
|
database.
|
|
For all functions,
|
|
.Fa inbuflen
|
|
refers to the length of the buffer pointed to by
|
|
.Fa inbufp
|
|
and
|
|
.Fa outbuflen
|
|
refers to the length of the buffer pointed to by
|
|
.Fa outbufp .
|
|
.Pp
|
|
The
|
|
.Fn rctl_add_rule
|
|
function adds the rule pointed to by
|
|
.Fa inbufp
|
|
to the resource limits database.
|
|
The
|
|
.Fa outbufp
|
|
and
|
|
.Fa outbuflen
|
|
arguments are unused.
|
|
Rule format is as described in
|
|
.Xr rctl 8 ,
|
|
with exceptions noted in the
|
|
.Sx RULES AND FILTERS
|
|
section.
|
|
.Pp
|
|
The
|
|
.Fn rctl_get_limits
|
|
function returns in
|
|
.Fa outbufp
|
|
a comma-separated list of rules that apply to the process that
|
|
matches the filter specified in
|
|
.Fa inbufp .
|
|
This includes rules with a subject of the process itself as well as rules
|
|
with a different subject (such as user or loginclass) that apply to the
|
|
process.
|
|
.Pp
|
|
The
|
|
.Fn rctl_get_racct
|
|
function returns resource usage information for a given subject.
|
|
The subject is specified by passing a filter in
|
|
.Fa inbufp .
|
|
Filter syntax is as described in
|
|
.Xr rctl 8 ,
|
|
with exceptions noted in the
|
|
.Sx RULES AND FILTERS
|
|
section.
|
|
A comma-separated list of resources and the amount used of each by the
|
|
specified subject is returned in
|
|
.Fa outbufp .
|
|
The resource and amount is formatted as
|
|
.Qq resource=amount .
|
|
.Pp
|
|
The
|
|
.Fn rctl_get_rules
|
|
function returns in
|
|
.Fa outbufp
|
|
a comma-separated list of rules from the resource limits database that
|
|
match the filter passed in
|
|
.Fa inbufp .
|
|
Filter syntax is as described in
|
|
.Xr rctl 8 ,
|
|
with exceptions noted in the
|
|
.Sx RULES AND FILTERS
|
|
section.
|
|
A filter of
|
|
.Va ::
|
|
may be passed to return all rules.
|
|
.Pp
|
|
The
|
|
.Fn rctl_remove_rule
|
|
function removes all rules matching the filter passed in
|
|
.Fa inbufp
|
|
from the resource limits database.
|
|
Filter syntax is as described in
|
|
.Xr rctl 8 ,
|
|
with exceptions noted in the
|
|
.Sx RULES AND FILTERS
|
|
section.
|
|
.Fa outbufp
|
|
and
|
|
.Fa outbuflen
|
|
are unused.
|
|
.Sh RULES AND FILTERS
|
|
This section explains how the rule and filter format described in
|
|
.Xr rctl 8
|
|
differs from the format passed to the system calls themselves.
|
|
The rctl tool provides several conveniences that the system calls do not.
|
|
When using the system call:
|
|
.Bl -dash -offset indent
|
|
.It
|
|
The subject must be fully specified.
|
|
For example, abbreviating
|
|
.Ql user
|
|
to
|
|
.Ql u
|
|
is not acceptable.
|
|
.It
|
|
User and group IDs must be numeric.
|
|
For example,
|
|
.Ql root
|
|
must be expressed as
|
|
.Ql 0 .
|
|
.It
|
|
Units are not permitted on resource amounts.
|
|
For example, a quantity of 1024 bytes must be expressed as
|
|
.Ql 1024
|
|
and not
|
|
.Ql 1k .
|
|
.El
|
|
.Sh RETURN VALUES
|
|
.Rv -std
|
|
.Sh ERRORS
|
|
The rctl system calls may fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er ENOSYS
|
|
RACCT/RCTL support is not present in the kernel or the
|
|
.Va kern.racct.enable
|
|
sysctl is 0.
|
|
.It Bq Er EINVAL
|
|
The rule or filter passed in
|
|
.Fa inbufp
|
|
is invalid.
|
|
.It Bq Er EPERM
|
|
User has insufficient privileges to carry out the requested operation.
|
|
.It Bq Er E2BIG
|
|
.Fa inbufp
|
|
or
|
|
.Fa outbufp
|
|
are too large.
|
|
.It Bq Er ESRCH
|
|
No process matched the provided rule or filter.
|
|
.It Bq Er ENAMETOOLONG
|
|
The loginclass or jail name specified is too long.
|
|
.It Bq Er ERANGE
|
|
The rule amount is outside of the allowable range or
|
|
.Fa outbufp
|
|
is too small.
|
|
.It Bq Er EOPNOTSUPP
|
|
The requested operation is not supported for the given rule or filter.
|
|
.It Bq Er EFAULT
|
|
.Fa inbufp
|
|
or
|
|
.Fa outbufp
|
|
refer to invalid addresses.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr rctl 8
|
|
.Sh HISTORY
|
|
The rctl family of system calls appeared in
|
|
.Fx 9.0 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The rctl system calls were developed by
|
|
.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org
|
|
under sponsorship from the FreeBSD Foundation.
|
|
This manual page was written by
|
|
.An Eric Badger Aq Mt badger@FreeBSD.org .
|