'\" t
.\"     Title: libnutclient_variables
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 04/26/2022
.\"    Manual: NUT Manual
.\"    Source: Network UPS Tools 2.8.0
.\"  Language: English
.\"
.TH "LIBNUTCLIENT_VARIABL" "3" "04/26/2022" "Network UPS Tools 2\&.8\&.0" "NUT Manual"
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.SH "NAME"
libnutclient_variables, nutclient_get_device_variables, nutclient_get_device_rw_variables, nutclient_has_device_variable, nutclient_get_device_variable_description, nutclient_get_device_variable_values, nutclient_set_device_variable_value, nutclient_set_device_variable_values \- Variable related functions in Network UPS Tools high\-level client access library
.SH "SYNOPSIS"
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.nf
#include <nutclient\&.h>
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.sp
.nf
typedef void* NUTCLIENT_t;
.fi
.sp
.nf
typedef char** strarr;
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.sp
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strarr nutclient_get_device_variables(NUTCLIENT_t client,
        const char* dev);
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.sp
.nf
strarr nutclient_get_device_rw_variables(NUTCLIENT_t client,
        const char* dev);
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.sp
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int nutclient_has_device_variable(NUTCLIENT_t client,
        const char* dev, const char* var);
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.sp
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char* nutclient_get_device_variable_description(NUTCLIENT_t client,
        const char* dev, const char* var);
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.sp
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strarr nutclient_get_device_variable_values(NUTCLIENT_t client,
        const char* dev, const char* var);
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.sp
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void nutclient_set_device_variable_value(NUTCLIENT_t client,
        const char* dev, const char* var, const char* value);
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void nutclient_set_device_variable_values(NUTCLIENT_t client,
        const char* dev, const char* var, const strarr values);
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.SH "DESCRIPTION"
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These functions allow to manage variables of devices\&.
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The \fBnutclient_get_device_variables()\fR function retrieves the list of variables names for a device\&. The returned strarr must be freed by \fIstrarr_free\fR\&.
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The \fBnutclient_get_device_rw_variables\fR function retrieves the list of read\-write variables names for a device\&. The returned strarr must be freed by \fIstrarr_free\fR\&.
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The \fBnutclient_has_device_variable\fR function tests if the specified variable is supported by the device\&. Return 1 is supported and 0 if not\&.
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The \fBnutclient_get_device_variable_description\fR function retrieves the variable description, if any\&. The returned string must be freed\&.
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The \fBnutclient_get_device_variable_values\fR returns variable values (generally only one)\&. The returned strarr must be freed by \fIstrarr_free\fR\&.
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The \fBnutclient_set_device_variable_value\fR intends to set the value of the specified variable\&.
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The \fBnutclient_set_device_variable_values\fR intends to set multiple values of the specified variable\&.
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Common arguments:
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.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIdev\fR
is the device name\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIvar\fR
is the variable name\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIvalue\fR
is the variable value\&.
.RE
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.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fIvalues\fR
is the variable array of values\&.
.RE
.SH "SEE ALSO"
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\fBlibnutclient\fR(3) \fBlibnutclient_devices\fR(3) \fBlibnutclient_general\fR(3)