6e78e5feaa
os.homedir() calls libuv's uv_os_homedir() to retrieve the current user's home directory. PR-URL: https://github.com/nodejs/io.js/pull/1791 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Rod Vagg <rod@vagg.org>
4.7 KiB
OS
Stability: 2 - Stable
Provides a few basic operating-system related utility functions.
Use require('os') to access this module.
os.tmpdir()
Returns the operating system's default directory for temporary files.
os.homedir()
Returns the home directory of the current user.
os.endianness()
Returns the endianness of the CPU. Possible values are 'BE' for big endian
or 'LE' for little endian.
os.hostname()
Returns the hostname of the operating system.
os.type()
Returns the operating system name. For example 'Linux' on Linux, 'Darwin'
on OS X and 'Windows_NT' on Windows.
os.platform()
Returns the operating system platform. Possible values are 'darwin',
'freebsd', 'linux', 'sunos' or 'win32'. Returns the value of
process.platform.
os.arch()
Returns the operating system CPU architecture. Possible values are 'x64',
'arm' and 'ia32'. Returns the value of process.arch.
os.release()
Returns the operating system release.
os.uptime()
Returns the system uptime in seconds.
os.loadavg()
Returns an array containing the 1, 5, and 15 minute load averages.
The load average is a measure of system activity, calculated by the operating system and expressed as a fractional number. As a rule of thumb, the load average should ideally be less than the number of logical CPUs in the system.
The load average is a very UNIX-y concept; there is no real equivalent on
Windows platforms. That is why this function always returns [0, 0, 0] on
Windows.
os.totalmem()
Returns the total amount of system memory in bytes.
os.freemem()
Returns the amount of free system memory in bytes.
os.cpus()
Returns an array of objects containing information about each CPU/core installed: model, speed (in MHz), and times (an object containing the number of milliseconds the CPU/core spent in: user, nice, sys, idle, and irq).
Example inspection of os.cpus:
[ { model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 252020,
nice: 0,
sys: 30340,
idle: 1070356870,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 306960,
nice: 0,
sys: 26980,
idle: 1071569080,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 248450,
nice: 0,
sys: 21750,
idle: 1070919370,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 256880,
nice: 0,
sys: 19430,
idle: 1070905480,
irq: 20 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 511580,
nice: 20,
sys: 40900,
idle: 1070842510,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 291660,
nice: 0,
sys: 34360,
idle: 1070888000,
irq: 10 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 308260,
nice: 0,
sys: 55410,
idle: 1071129970,
irq: 880 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 266450,
nice: 1480,
sys: 34920,
idle: 1072572010,
irq: 30 } } ]
Note that since nice values are UNIX centric in Windows the nice values of
all processors are always 0.
os.networkInterfaces()
Get a list of network interfaces:
{ lo:
[ { address: '127.0.0.1',
netmask: '255.0.0.0',
family: 'IPv4',
mac: '00:00:00:00:00:00',
internal: true },
{ address: '::1',
netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
family: 'IPv6',
mac: '00:00:00:00:00:00',
internal: true } ],
eth0:
[ { address: '192.168.1.108',
netmask: '255.255.255.0',
family: 'IPv4',
mac: '01:02:03:0a:0b:0c',
internal: false },
{ address: 'fe80::a00:27ff:fe4e:66a1',
netmask: 'ffff:ffff:ffff:ffff::',
family: 'IPv6',
mac: '01:02:03:0a:0b:0c',
internal: false } ] }
Note that due to the underlying implementation this will only return network interfaces that have been assigned an address.
os.EOL
A constant defining the appropriate End-of-line marker for the operating system.