Copyright (c) 2007 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Juan Romero Pardines.
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 NetBSD
Foundation, Inc. and its contributors.
4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 4, 2007 .Dt ENVSYS 4 .Os .Sh NAME .Nm envsys .Nd Environmental Systems framework (version 2) .Sh SYNOPSIS n sys/envsys.h .Sh DESCRIPTION
p The .Nm framework provides support to handle hardware monitor sensors. Hardware monitoring chips are able to report values from different types of sensors.
p The .Nm framework consists of two parts:
p l -enum -offset indent -compact t the userland part, to receive the current sensor data and to set some properties on sensors: .Xr envsys 4 . t the kernel part that is able to talk to the drivers providing sensor data: .Xr sysmon_envsys 9 . .El
p The .Nm framework uses .Xr proplib 3 for communication between kernel and user space. The following .Xr ioctl 2 types are available:
p l -tag -width XX -compact t Dv ENVSYS_GETDICTIONARY (prop_dictionary_t)
p This .Xr ioctl 2 is used to receive the global dictionary that is being used in the kernel by the .Xr sysmon_envsys 9 framework. It will contain an array of dictionaries per device and one dictionary per sensor, each of them with its own characteristics and values.
p The following XML property list represents a virtual device .Dq device0 with one sensor .Dq sensor0 and all available properties set on it:
p
d -literal
p Let's explain some more about those objects: l -tag -width "monitoring-state-critical-overxx" t Fa avg-value Current average value in the sensor. t Fa critical-capacity Critical capacity set previously by the .Ar ENVSYS_SETDICTIONARY .Xr ioctl 2 . Only available on sensors with the .Em want-percentage object enabled. t Fa critical-max-limit Critical max limit set previously by the .Ar ENVSYS_SETDICTIONARY .Xr ioctl 2 . t Fa critical-min-limit Critical min limit set previously by the .Ar ENVSYS_SETDICTIONARY .Xr ioctl 2 . t Fa cur-value Current value in the sensor. t Fa description Description of the sensor. t Fa generic-state-string This is a generic string that .Xr envstat 8 will use to print as .Em current value . Only used in sensors with type of .Em ENVSYS_GSTRING . t Fa max-value Current max value in the sensor. t Fa min-value Current min value in the sensor. t Fa monitoring-state-critical If true, the driver has enabled the flag to monitor a critical state. t Fa monitoring-state-critical-over If true, the driver has enabled the flag to monitor a critical over state. t Fa monitoring-state-critical-under If true, the driver has enabled the flag to monitor a critical under state. t Fa monitoring-state-state-changed If true, the driver has enabled the flag to monitor for state changes in a drive or Battery state sensor. t Fa monitoring-state-warning-over If true, the driver has enabled the flag to monitor a warning over state. t Fa monitoring-state-warning-under If true, the driver has enabled the flag to monitor a warning under state. t Fa monitoring-supported If true, critical capacity/max/min limits may be set by the .Ar ENVSYS_SETDICTIONARY .Xr ioctl 2 . t Fa state Current state in the sensor. t Fa type Type of unit in the sensor. t Fa want-percentage If true, .Em max-value and .Em cur-value are valid and a percentage may be computed from them. .El .El
p l -tag -width XX -compact t Dv ENVSYS_SETDICTIONARY (prop_dictionary_t)
p
This
.Xr ioctl 2
is used to send a dictionary with new properties that should be
processed by the
.Nm
framework. Only a set of predefined keywords are recognized by
the kernel part. The following is the property list representation
of a dictionary with all recognized and required keywords:
d -literal
p A dictionary sent to the kernel with this .Xr ioctl 2 must .Sy always have the objects .Ar driver-name and .Ar sensor-name . They are used to specify the .Sy driver and the .Sy sensor that we want to set a property for.
p .Em NOTE: Only one of the following objects must be added into the dictionary at a time: .Ar new-description , .Ar new-rfact , .Ar critical-capacity , .Ar critical-max-limit , .Ar critical-min-limit , .Ar remove-critical-cap , .Ar remove-cmax-limit , and .Ar remove-cmin-limit .
p The following operation is selected depending what object was added into the dictionary:
p l -bullet -offset indent -compact t change a description. t change the rfact in a voltage sensor. t set a critical capacity limit. t set a critical max limit. t set a critical min limit. t remove a critical capacity limit. t remove a critical max limit. t remove a critical min limit. .El
p If an unknown object was sent with the dictionary, .Er EINVAL will be returned, or if the sensor does not support changing rfact (voltage sensors) or critical/capacity limits, .Er ENOTSUP will be returned. .El
p .Sh NOTES When setting a critical max or min limit with the .Em ENVSYS_SETDICTIONARY .Xr ioctl 2 , the user must be aware that .Xr sysmon_envsys 9 expects to have a proper unit, so the value must be converted. Please see .Xr sysmon_envsys 9 for more information.
p Also when setting a critical capacity limit, the formula to send a proper value to .Xr sysmon_envsys 9 is the following: .Em value = (value / 100) * max value . The max value is available in the sensor's dictionary.
p .Sh EXAMPLES The following example illustrates how to receive the dictionary and to print it in raw XML/plist format: d -literal #define _DEV_SYSMON /dev/sysmon int main(void) { prop_dictionary_t dict; char *buf; int fd; if ((fd = open(_DEV_SYSMON, O_RDONLY)) == -1) err(EXIT_FAILURE, "open") if (prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict)) { (void)close(fd); err(EINVAL, "prop_dictionary_recv_ioctl"); } buf = prop_dictionary_externalize(dict); (void)printf("%s", buf); prop_object_release(dict); free(buf); (void)close(fd); return EXIT_SUCCESS; } .Ed
p Another example that shows how to use the .Ar ENVSYS_SETDICTIONARY .Xr ioctl 2 to change the description in a sensor: d -literal int main(void) { prop_dictionary_t dict; prop_object_t obj; int fd; dict = prop_dictionary_create(); obj = prop_string_create_cstring_nocopy("aiboost0"); if (obj == NULL || !prop_dictionary_set(dict, "driver-name", obj)) err(EINVAL, "driver-name"); prop_object_release(obj); obj = prop_string_create_cstring_nocopy("CPU Temperature"); if (obj == NULL || !prop_dictionary_set(dict, "sensor-name", obj)) err(EINVAL, "sensor-name"); prop_object_release(obj); /* new description */ obj = prop_string_create_cstring_nocopy("CPU temp"); if (obj == NULL || !prop_dictionary_set(dict, "new-description", obj)) err(EINVAL, "new-description"); prop_object_release(obj); if ((fd = open(_DEV_SYSMON, O_RDONLY)) == -1) err(EXIT_FAILURE, "open") /* we are done, send the dictionary */ error = prop_dictionary_send_ioctl(dict, fd, ENVSYS_SETDICTIONARY); prop_object_release(dict); (void)close(fd); return error; } .Ed .Sh AUTHORS The .Nm 2 framework was designed and implemented by .An Juan Romero Pardines for .Nx 5.0 . Many useful comments for this framework were from Jason R. Thorpe, Tim Rightnour and Michael Lorenz. Previous framework was implemented by Tim Rightnour and Bill Squier. .Sh SEE ALSO .Xr envstat 8 , .Xr sysmon_envsys 9
Indexes created Wed Oct 15 16:09:53 GMT 2025