Module os

Operating system and file system processing module

Instructions:

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var os = require('os');

Object

Service

Service constructor, see Service

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Service os.Service;

Static function

hostname

Query the host name of the current running environment

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static String os.hostname();

Return result:

• String , returns the host name

endianness

Query the byte order of the current CPU

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static String os.endianness();

Return result:

• String , return byte order

type

Query the operating system name of the current running environment

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static String os.type();

Return result:

• String , returns the system name

release

Query the operating system version of the current operating environment

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static String os.release();

Return result:

• String , return version information

homedir

Query current user directory

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static String os.homedir();

Return result:

• String , returns the directory string

arch

Query the current cpu environment

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static String os.arch();

Return result:

• String , returns the cpu type, possible results are'amd64','arm','arm64','ia32'

uptime

Query the running time of the running environment, in seconds

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static Number os.uptime();

Return result:

• Number , returns a numeric value representing the time

loadavg

Query the operating environment for 1 minute, 5 minutes, 15 minutes average load

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static Array os.loadavg();

Return result:

• Array , returns an array containing three load data

totalmem

Query the total memory of the operating environment, in bytes

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static Long os.totalmem();

Return result:

• Long , return memory data

freemem

Query the available memory of the operating environment, in bytes

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static Long os.freemem();

Return result:

• Long , return memory data

cpus

Query the number and parameters of the current operating environment cpu

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static Array os.cpus();

Return result:

• Array , returns an array containing cpu parameters, each item corresponds to a cpu

cpuNumbers

Query the number of CPUs in the current operating environment

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static Integer os.cpuNumbers();

Return result:

• Integer , returns the number of cpu

tmpdir

Query the temporary file directory of the current operating environment

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static String os.tmpdir();

Return result:

• String , returns the temporary file directory

userInfo

Return the current effective user information

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static Object os.userInfo(Object options = {});

Call parameters:

• options : Object, the character encoding used to interpret the result string

Return result:

• Object , current effective execution user information

networkInterfaces

Query current operating environment network information

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static Object os.networkInterfaces();

Return result:

• Object , return network card information

printerInfo

Query the printer information of the current host

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static Array os.printerInfo();

Return result:

• Array , return printer information

openPrinter

Create a printer output object

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static BufferedStream os.openPrinter(String name) async;

Call parameters:

• name : String, printer name

Return result:

• BufferedStream , returns the printer output object

platform

Query the current platform name

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static String os.platform();

Return result:

• String , returns the platform name, possible results are'darwin','freebsd','linux', or'win32'

time

Parse the time string or query the current time of the runtime environment

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static Date os.time(String tmString = "");

Call parameters:

• tmString : String, time string, the default is to query the current time

Return result:

• Date , returns the javascript Date object

dateAdd

Time calculation function, specify calculation time according to part

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static Date os.dateAdd(Date d,
    Integer num,
    String part);

Call parameters:

• d : Date, specified for calculating Date objects
• num : Integer, specify the value of the operation
• part : String, specify the time part of the operation, the accepted values ​​are: "year", "month", "day", "hour", "minute", "second"

Return result:

• Date , returns the javascript Date object

memoryUsage

Query current process memory usage report

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static Object os.memoryUsage();

Return result:

• Object , return contains memory report

The memory report generates results similar to the following:

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{
    "rss": 8622080,
    "heapTotal": 4083456,
    "heapUsed": 1621800,
    "nativeObjects": 122
}

among them:

• rss returns the size of physical memory currently occupied by the process
• heapTotal returns the v8 engine heap memory size
• heapUsed returns the size of the heap memory being used by the v8 engine
• nativeObjects returns the current number of valid built-in objects

Static properties

timezone

Integer, query the current time zone of the runtime environment

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static readonly Integer os.timezone;

EOL

String, query the end of line identifier of the current operating environment, posix:\"\n\"; windows:\"\r\n\"

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static readonly String os.EOL;

execPath

String, query the full path of the current execution file

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static readonly String os.execPath;