Hostname: Difference between revisions
m
→{{header|Wren}}: Minor tidy
m (→{{header|Wren}}: Minor tidy) |
|||
| (196 intermediate revisions by more than 100 users not shown) | |||
Line 1:
{{task|Programming environment operations}}
[[Category:Networking and Web Interaction]]
;Task:
Find the name of the host on which the routine is running.
<br><br>
=={{header|Ada}}==
Works with GCC/GNAT
<syntaxhighlight lang="ada">with Ada.Text_IO; use Ada.Text_IO;
with GNAT.Sockets;
Line 12 ⟶ 14:
begin
Put_Line (GNAT.Sockets.Host_Name);
end Demo;</syntaxhighlight>
=={{header|Aikido}}==
<syntaxhighlight lang="aikido">
println (System.hostname)
</syntaxhighlight>
=={{header|ALGOL 68}}==
<!-- {{may not works with|ALGOL 68|Standard - extensions to libraries used}} -->
{{works with|ALGOL 68G|Any - tested with release mk15-0.8b.fc9.i386}}
<!-- {{does not works with|ELLA ALGOL 68|Any (with appropriate job cards) - tested with release 1.8.8d.fc9.i386 - No such library function.}} -->
{{works with|POSIX|.1}}
<syntaxhighlight lang="algol68">STRING hostname;
get(read OF execve child pipe("/bin/hostname","hostname",""), hostname);
print(("hostname: ", hostname, new line))</syntaxhighlight>
=={{header|AppleScript}}==
<syntaxhighlight lang="applescript">
host name of (system info)
</syntaxhighlight>
=={{header|Arc}}==
<syntaxhighlight lang="arc">(system "hostname -f")</syntaxhighlight>
=={{header|Arturo}}==
<syntaxhighlight lang="arturo">print sys\hostname</syntaxhighlight>
{{out}}
<pre>drkameleons-Mac.home</pre>
=={{header|AutoHotkey}}==
<syntaxhighlight lang="autohotkey">MsgBox % A_ComputerName</syntaxhighlight>
via Windows Management Instrumentation (WMI)
<syntaxhighlight lang="autohotkey">for objItem in ComObjGet("winmgmts:\\.\root\CIMV2").ExecQuery("SELECT * FROM Win32_ComputerSystem")
MsgBox, % "Hostname:`t" objItem.Name</syntaxhighlight>
=={{header|AWK}}==
{{noticebox||WARNING: the following purported solution makes an assumption about environment variables that may not be applicable in all circumstances.}}
<syntaxhighlight lang="awk">$ awk 'BEGIN{print ENVIRON["HOST"]}'
E51A08ZD</syntaxhighlight>
=={{header|BaCon}}==
<syntaxhighlight lang="freebasic">PRINT "Hostname: ", HOSTNAME$</syntaxhighlight>
=={{header|Batch File}}==
Since Windows 2000 :
<syntaxhighlight lang="dos">Hostname</syntaxhighlight>
=={{header|BBC BASIC}}==
{{works with|BBC BASIC for Windows}}
<syntaxhighlight lang="bbcbasic"> INSTALL @lib$+"SOCKLIB"
PROC_initsockets
PRINT "hostname: " FN_gethostname
PROC_exitsockets</syntaxhighlight>
=={{header|C}}/{{header|C++}}==
{{works with|gcc|4.0.1}}
{{works with|POSIX|.1}}
<
#include <stdio.h>
#include <limits.h>
#include <unistd.h>
int main(void)
{
}</syntaxhighlight>
=={{header|C sharp|C#}}==
<syntaxhighlight lang
=={{header|Caché ObjectScript}}==
<pre>Write ##class(%SYS.System).GetNodeName()</pre>
=={{header|Clojure}}==
<syntaxhighlight lang="clojure">
(.. java.net.InetAddress getLocalHost getHostName)
</syntaxhighlight>
<syntaxhighlight lang="shell">
java -cp clojure.jar clojure.main -e "(.. java.net.InetAddress getLocalHost getHostName)"
</syntaxhighlight>
=={{header|COBOL}}==
<syntaxhighlight lang="cobol"> identification division.
program-id. hostname.
data division.
working-storage section.
01 hostname pic x(256).
01 nullpos pic 999 value 1.
procedure division.
call "gethostname" using hostname by value length of hostname
string hostname delimited by low-value into hostname
with pointer nullpos
display "Host: " hostname(1 : nullpos - 1)
goback.
end program hostname.
</syntaxhighlight>
=={{header|CoffeeScript}}==
<syntaxhighlight lang="coffeescript">
os = require 'os'
console.log os.hostname()
</syntaxhighlight>
=={{header|Common Lisp}}==
Another operating system feature that is implemented differently across lisp implementations. Here we show how to create a function that obtains the required result portably by working differently for each supported implementation. This technique is heavily used to make portable lisp libraries.
<syntaxhighlight lang="lisp">(defun get-host-name ()
#+(or sbcl ccl) (machine-instance)
#+clisp (let ((s (machine-instance))) (subseq s 0 (position #\Space s)))
#-(or sbcl ccl clisp) (error "get-host-name not implemented"))</syntaxhighlight>
{{libheader|CFFI}}
Another way is to use the [[FFI]] to access POSIX' <code>gethostname(2)</code>:
<syntaxhighlight lang="lisp">(cffi:defcfun ("gethostname" c-gethostname) :int
(buf :pointer) (len :unsigned-long))
(defun get-hostname ()
(cffi:with-foreign-object (buf :char 256)
(unless (zerop (c-gethostname buf 256))
(error "Can't get hostname"))
(values (cffi:foreign-string-to-lisp buf))))</syntaxhighlight>
<syntaxhighlight lang="lisp">BOA> (get-hostname)
"aurora"</syntaxhighlight>
=={{header|Crystal}}==
<syntaxhighlight lang="crystal">hostname = System.hostname</syntaxhighlight>
=={{header|D}}==
<syntaxhighlight lang="d">import std.stdio, std.socket;
void main() {
writeln(Socket.hostName());
}</syntaxhighlight>
=={{header|Delphi}}==
<syntaxhighlight lang="delphi">program ShowHostName;
{$APPTYPE CONSOLE}
uses Windows;
var
lHostName: array[0..255] of char;
lBufferSize: DWORD;
begin
lBufferSize := 256;
if GetComputerName(lHostName, lBufferSize) then
Writeln(lHostName)
else
Writeln('error getting host name');
end.</syntaxhighlight>
=={{header|E}}==
<syntaxhighlight lang="e">makeCommand("hostname")()[0].trim()</syntaxhighlight>
Not exactly a good way to do it. A better way ought to be introduced along with a proper socket interface. [[Category:E examples needing attention]]
=={{header|Emacs Lisp}}==
<syntaxhighlight lang="lisp">(system-name)</syntaxhighlight>
=={{header|Erlang}}==
<syntaxhighlight lang="erlang">Host = net_adm:localhost().</syntaxhighlight>
=={{header|F_Sharp|F#}}==
<syntaxhighlight lang="fsharp">printfn "%s" (System.Net.Dns.GetHostName())</syntaxhighlight>
=={{header|Factor}}==
<syntaxhighlight lang="factor">USE: io.sockets
host-name</syntaxhighlight>
=={{header|Forth}}==
{{works with|GNU Forth|0.7.0}}
<syntaxhighlight lang="forth">include unix/socket.fs
hostname type</syntaxhighlight>
=={{header|Fortran}}==
{{works with|gfortran}}
The function/subroutine <tt>HOSTNM</tt> is a GNU extension.
<syntaxhighlight lang="fortran">program HostTest
character(len=128) :: name
call hostnm(name)
print *, name
end program HostTest</syntaxhighlight>
Using fortran 2003 C-interoperability we can call posix C function gethostname (unix system call) directly
<syntaxhighlight lang="fortran">
program test_hostname
use, intrinsic :: iso_c_binding
implicit none
interface !to function: int gethostname(char *name, size_t namelen);
integer(c_int) function gethostname(name, namelen) bind(c)
use, intrinsic :: iso_c_binding, only: c_char, c_int, c_size_t
integer(c_size_t), value, intent(in) :: namelen
character(len=1,kind=c_char), dimension(namelen), intent(inout) :: name
end function gethostname
end interface
integer(c_int) :: status
integer,parameter :: HOST_NAME_MAX=255
character(kind=c_char,len=1),dimension(HOST_NAME_MAX) :: cstr_hostname
integer(c_size_t) :: lenstr
character(len=:),allocatable :: hostname
lenstr = HOST_NAME_MAX
status = gethostname(cstr_hostname, lenstr)
hostname = c_to_f_string(cstr_hostname)
write(*,*) hostname, len(hostname)
contains
! convert c_string to f_string
pure function c_to_f_string(c_string) result(f_string)
use, intrinsic :: iso_c_binding, only: c_char, c_null_char
character(kind=c_char,len=1), intent(in) :: c_string(:)
character(len=:), allocatable :: f_string
integer i, n
i = 1
do
if (c_string(i) == c_null_char) exit
i = i + 1
end do
n = i - 1 ! exclude c_null_char
allocate(character(len=n) :: f_string)
f_string = transfer(c_string(1:n), f_string)
end function c_to_f_string
end program test_hostname
</syntaxhighlight>
=={{header|FreeBASIC}}==
<syntaxhighlight lang="freebasic">' FB 1.05.0 Win64
' On Windows 10, the command line utility HOSTNAME.EXE prints the 'hostname' to the console.
' We can execute this remotely and read from its 'stdin' stream as follows:
Dim As String hostname
Open Pipe "hostname" For Input As #1
Input #1, hostname
Close #1
Print hostname
Print
Print "Press any key to quit"
Sleep</syntaxhighlight>
=={{header|friendly interactive shell}}==
{{trans|UNIX Shell}}
<syntaxhighlight lang="fishshell">hostname</syntaxhighlight>
or
<syntaxhighlight lang="fishshell">uname -n</syntaxhighlight>
=={{header|Frink}}==
<syntaxhighlight lang="frink">callJava["java.net.InetAddress", "getLocalHost"].getHostName[]</syntaxhighlight>
=={{header|FutureBasic}}==
<syntaxhighlight lang="futurebasic">
include "NSLog.incl"
NSLog( @"%@", fn ProcessInfoHostName )
HandleEvents
</syntaxhighlight>
=={{header|Gambas}}==
'''[https://gambas-playground.proko.eu/?gist=11d7f489117d7909da509050103b7891 Click this link to run this code]'''
<syntaxhighlight lang="gambas">Public Sub Main()
Print System.Host
End</syntaxhighlight>
Output:
<pre>
charlie
</pre>
=={{header|Go}}==
Use [https://golang.org/pkg/os/#Hostname <code>os.Hostname</code>].
<syntaxhighlight lang="go">package main
import (
"fmt"
"os"
)
func main() {
fmt.Println(os.Hostname())
}</syntaxhighlight>
=={{header|Groovy}}==
<syntaxhighlight lang="groovy">println InetAddress.localHost.hostName</syntaxhighlight>
=={{header|Harbour}}==
<syntaxhighlight lang="visualfoxpro">? NetName()</syntaxhighlight>
=={{header|Haskell}}==
{{libheader|network}}
Or if you don't want to depend on the network package being installed, you can implement it on your own (this implementation is based on the implementation in the network package).
<syntaxhighlight lang="haskell">module GetHostName where
import Foreign.Marshal.Array ( allocaArray0, peekArray0 )
import Foreign.C.Types ( CInt(..), CSize(..) )
import Foreign.C.String ( CString, peekCString )
import Foreign.C.Error ( throwErrnoIfMinus1_ )
getHostName :: IO String
getHostName = do
let size = 256
allocaArray0 size $ \ cstr -> do
throwErrnoIfMinus1_ "getHostName" $ c_gethostname cstr (fromIntegral size)
peekCString cstr
foreign import ccall "gethostname"
c_gethostname :: CString -> CSize -> IO CInt
main = do hostName <- getHostName
putStrLn hostName</syntaxhighlight>
=={{header|Icon}} and {{header|Unicon}}==
<syntaxhighlight lang="icon">procedure main()
write(&host)
end</syntaxhighlight>
=={{header|IDL}}==
<syntaxhighlight
=={{header|J}}==
<syntaxhighlight lang="j">NB. Load the socket libraries
load 'socket'
coinsert 'jsocket'
NB. fetch and implicitly display the hostname
> {: sdgethostname ''
NB. If fetching the hostname is the only reason for loading the socket libraries,
NB. and the hostname is fetched only once, then use a 'one-liner' to accomplish it:
> {: sdgethostname coinsert 'jsocket' [ load 'socket'</syntaxhighlight>
=={{header|Java}}==
<
import java.net.
import java.net.UnknownHostException;
</syntaxhighlight>
<syntaxhighlight lang="java">
void printHostname() throws UnknownHostException {
InetAddress localhost = InetAddress.getLocalHost();
System.out.println(localhost.getHostName());
}
</syntaxhighlight>
<pre>
penguin
</pre>
=={{header|JavaScript}}==
{{works with|JScript}}
<syntaxhighlight lang="javascript">var network = new ActiveXObject('WScript.Network');
var hostname = network.computerName;
WScript.echo(hostname);</syntaxhighlight>
=={{header|jq}}==
Currently jq does not have a "gethostname" or a "system" command, so the best ways for a jq program to have access to the hostname are via an environment variable, or via a command line argument, as illustrated here:
<pre>HOST=$(hostname) jq -n --arg hostname $(hostname) '[env.HOST, $hostname]'</pre>
{{output}}
<pre>[
"mini.local",
"mini.local"
]</pre>
=={{header|Jsish}}==
<syntaxhighlight lang="javascript">var hn = exec("hostname", {retAll:true}).data.trim();</syntaxhighlight>
=={{header|Julia}}==
<syntaxhighlight lang="julia">
println(gethostname())
</syntaxhighlight>
{{out}}
<pre>
harlan
</pre>
=={{header|K}}==
<syntaxhighlight lang="k">
_h
</syntaxhighlight>
{{out}}
<pre>
`"narasimman-pc"
</pre>
=={{header|Kotlin}}==
<syntaxhighlight lang="scala">// version 1.1.4
import java.net.InetAddress
fun main(args: Array<String>) {
println(InetAddress.getLocalHost().hostName)
}</syntaxhighlight>
=={{header|Lasso}}==
This will ge the hostname as reported by the web server
<syntaxhighlight lang="lasso">[web_request->httpHost]</syntaxhighlight>
-> www.myserver.com
This will ge the hostname as reported by the system OS
<syntaxhighlight lang="lasso">define host_name => thread {
data
public initiated::date, // when the thread was initiated. Most likely at Lasso server startup
private hostname::string // as reported by the servers hostname
public onCreate() => {
.reset
}
public reset() => {
if(lasso_version(-lassoplatform) >> 'Win') => {
protect => {
local(process = sys_process('cmd',(:'hostname.exe')))
#process -> wait
.hostname = string(#process -> readstring) -> trim&
#process -> close
}
else
protect => {
local(process = sys_process('/bin/hostname'))
#process -> wait
.hostname = string(#process -> readstring) -> trim&
#process -> close
}
}
.initiated = date(date -> format(`yyyyMMddHHmmss`)) // need to set format to get rid of nasty hidden fractions of seconds
.hostname -> size == 0 ? .hostname = 'undefined'
}
public asString() => .hostname
}
host_name</syntaxhighlight>
-> mymachine.local
=={{header|LFE}}==
<syntaxhighlight lang="lisp">
(net_adm:localhost)
</syntaxhighlight>
=={{header|Liberty BASIC}}==
<syntaxhighlight lang="lb">lpBuffer$=Space$(128) + Chr$(0)
struct SIZE,sz As Long
SIZE.sz.struct=Len(lpBuffer$)
calldll #kernel32, "GetComputerNameA",lpBuffer$ as ptr, SIZE as struct, result as Long
CurrentComputerName$=Trim$(Left$(lpBuffer$, SIZE.sz.struct))
print CurrentComputerName$</syntaxhighlight>
=={{header|Limbo}}==
As with nearly anything in Inferno, it boils down to reading a file:
<syntaxhighlight lang="limbo">implement Hostname;
include "sys.m"; sys: Sys;
include "draw.m";
Hostname: module {
init: fn(nil: ref Draw->Context, nil: list of string);
};
init(nil: ref Draw->Context, nil: list of string)
{
sys = load Sys Sys->PATH;
buf := array[Sys->ATOMICIO] of byte;
fd := sys->open("/dev/sysname", Sys->OREAD);
if(fd == nil)
die("Couldn't open /dev/sysname");
n := sys->read(fd, buf, len buf - 1);
if(n < 1)
die("Couldn't read /dev/sysname");
buf[n++] = byte '\n';
sys->write(sys->fildes(1), buf, n);
}
die(s: string)
{
sys->fprint(sys->fildes(2), "hostname: %s: %r", s);
raise "fail:errors";
}
</syntaxhighlight>
Sys->ATOMICIO is usually 8 kilobytes; this version truncates if you have a ridiculously long hostname.
=={{header|Lingo}}==
{{libheader|Shell Xtra}}
<syntaxhighlight lang="lingo">
sx = xtra("Shell").new()
if the platform contains "win" then
hostname = sx.shell_cmd("hostname", ["eol":RETURN]).line[1] -- win 7 or later
else
hostname = sx.shell_cmd("hostname", RETURN).line[1]
end if</syntaxhighlight>
=={{header|LiveCode}}==
<syntaxhighlight lang="livecode">answer the hostName</syntaxhighlight>
=={{header|Lua}}==
Requires: LuaSocket
<syntaxhighlight lang="lua">socket = require "socket"
print( socket.dns.gethostname() )</syntaxhighlight>
=={{header|M2000 Interpreter}}==
<syntaxhighlight lang="m2000 interpreter">
Module Host {
\\ one way
Print computer$
\\ second way
Declare objNetwork "WScript.Network"
With objNetwork, "ComputerName" as cName$
Print cName$, cName$=Computer$
Declare objNetwork Nothing
}
Host
</syntaxhighlight>
=={{header|Maple}}==
<syntaxhighlight lang="maple">Sockets:-GetHostName()</syntaxhighlight>
=={{header|Mathematica}} / {{header|Wolfram Language}}==
<syntaxhighlight lang="mathematica">$MachineName</syntaxhighlight>
=={{header|MATLAB}}==
This is a built-in MATLAB function. "failed" is a Boolean which will be false if the command sent to the OS succeeds. "hostname" is a string containing the system's hostname, provided that the external command <tt>hostname</tt> exists.
<syntaxhighlight lang="matlab">[failed,hostname] = system('hostname')</syntaxhighlight>
=={{header|mIRC Scripting Language}}==
<syntaxhighlight lang="mirc">echo -ag $host</syntaxhighlight>
=={{header|Modula-3}}==
<syntaxhighlight lang="modula3">MODULE Hostname EXPORTS Main;
IMPORT IO, OSConfig;
Line 75 ⟶ 588:
BEGIN
IO.Put(OSConfig.HostName() & "\n");
END Hostname.</syntaxhighlight>
=={{header|MUMPS}}==
<syntaxhighlight lang="mumps">Write $Piece($System,":")</syntaxhighlight>
=={{header|NetRexx}}==
<syntaxhighlight lang="netrexx">/* NetRexx */
options replace format comments java crossref savelog symbols binary
say InetAddress.getLocalHost.getHostName
</syntaxhighlight>
=={{header|NewLISP}}==
<syntaxhighlight lang="newlisp">(! "hostname")</syntaxhighlight>
=={{header|Nim}}==
There are several ways to get the host name, for instance reading the environment variable HOSTNAME or calling the low level Posix function “gethostname”. The simplest way consists to use the function “getHostName” from module “nativeSockets”:
<syntaxhighlight lang="nim">import nativesockets
echo getHostName()</syntaxhighlight>
=={{header|Oberon-2}}==
Works with oo2c version 2
<syntaxhighlight lang="oberon2">
MODULE HostName;
IMPORT
OS:ProcessParameters,
Out;
BEGIN
Out.Object("Host: " + ProcessParameters.GetEnv("HOSTNAME"));Out.Ln
END HostName.
</syntaxhighlight>
Output:
<pre>
Host: localhost.localdomain
</pre>
=={{header|Objeck}}==
<syntaxhighlight lang="objeck">
use Net;
bundle Default {
class Hello {
function : Main(args : String[]) ~ Nil {
TCPSocket->HostName()->PrintLine();
}
}
}
</syntaxhighlight>
=={{header|Objective-C}}==
Cocoa / Cocoa Touch / GNUstep:
<syntaxhighlight lang="objc">
NSLog(@"%@", [[NSProcessInfo processInfo] hostName]);
</syntaxhighlight>
Example Output:
<syntaxhighlight lang="objc">
2010-09-16 16:20:00.000 Playground[1319:a0f] sierra117.local // Hostname is sierra117.local.
</syntaxhighlight>
=={{header|OCaml}}==
<syntaxhighlight lang
=={{header|Octave}}==
Similarly to [[Discover the Hostname#MATLAB|MATLAB]], we could call system command <tt>hostname</tt> to know the hostname. But we can also call the internal function <tt>uname()</tt> which returns a structure holding several informations, among these the hostname (nodename):
<syntaxhighlight lang="octave">uname().nodename</syntaxhighlight>
=={{header|ooRexx}}==
These solutions are platform specific.
===Windows Platform===
A solution using ActiveX/OLE on Windows
<syntaxhighlight lang="oorexx">say .oleObject~new('WScript.Network')~computerName</syntaxhighlight>
and one using the Windows environment variables
<syntaxhighlight lang="oorexx">say value('COMPUTERNAME',,'environment')</syntaxhighlight>
===UNIX Platform===
Some UNIX solutions (tested under Mac OS X):
ooRexx (and [[REXX|Rexx]]) can issue commands directly to the shell it's running under.
Output of the shell commands will normally be STDOUT and STDERR.
These next two samples will simply output the host name to the console if the program is run from a command prompt.
:'''Note:''' The '''<tt>address command</tt>''' clause causes the contents of the literal string that follows it to be sent to the command shell.
<syntaxhighlight lang="oorexx">address command 'hostname -f'</syntaxhighlight>
<syntaxhighlight lang="oorexx">address command "echo $HOSTNAME"</syntaxhighlight>
Command output can also be captured by the program to allow further processing.
ooRexx provides an external data queue manager ('''''<tt>rxqueue</tt>''''') that can be used for this.
In the following examples output written to STDOUT/STDERR is piped into '''<tt>rxqueue</tt>''' which sends it in turn to a Rexx queue for further processing by the program:
<syntaxhighlight lang="oorexx">/* Rexx */
address command "echo $HOSTNAME | rxqueue"
address command "hostname -f | rxqueue"
loop q_ = 1 while queued() > 0
parse pull hn
say q_~right(2)':' hn
end q_
</syntaxhighlight>
A utility class is also provided as a wrapper around the external data queue:
<syntaxhighlight lang="oorexx">/* Rexx */
qq = .rexxqueue~new()
address command "echo $HOSTNAME | rxqueue"
address command "hostname -f | rxqueue"
loop q_ = 1 while qq~queued() > 0
hn = qq~pull()
say q_~right(2)':' hn
end q_
</syntaxhighlight>
=={{header|Oz}}==
<syntaxhighlight lang="oz">{System.showInfo {OS.getHostByName 'localhost'}.name}</syntaxhighlight>
=={{header|PARI/GP}}==
Running the <code>hostname</code> or <code>uname</code> program and capturing its output (the first line of output) in a string.
<syntaxhighlight lang="parigp">str = externstr("hostname")[1];
str = externstr("uname -n")[1];</syntaxhighlight>
=={{header|Pascal}}==
For Windows systems see the [[Hostname#Delphi | Delphi]] example.
On Unix systems, FreePascal has the function GetHostName:
<syntaxhighlight lang="pascal">Program HostName;
uses
unix;
begin
writeln('The name of this computer is: ', GetHostName);
end.</syntaxhighlight>
Output example on Mac OS X:
<pre>
The name of this computer is: MyComputer.local
</pre>
=={{header|Perl}}==
{{works with|Perl|5.8.6}}
{{libheader|Sys::Hostname}}
<
$name = hostname;</
=={{header|Phix}}==
<!--<syntaxhighlight lang="phix">(notonline)-->
<span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- (system_exec, file i/o)</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">tmp</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"hostname.txt"</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">cmd</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()=</span><span style="color: #004600;">WINDOWS</span><span style="color: #0000FF;">?</span><span style="color: #008000;">"hostname"</span><span style="color: #0000FF;">:</span><span style="color: #008000;">"uname -n"</span><span style="color: #0000FF;">)</span>
<span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">system_exec</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%s > %s"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">cmd</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tmp</span><span style="color: #0000FF;">}),</span><span style="color: #000000;">4</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">string</span> <span style="color: #000000;">host</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">trim</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">get_text</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tmp</span><span style="color: #0000FF;">))</span>
<span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">delete_file</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"hostname.txt"</span><span style="color: #0000FF;">)</span>
<span style="color: #0000FF;">?</span><span style="color: #000000;">host</span>
<!--</syntaxhighlight>-->
{{out}}
<pre>
"Pete-PC"
</pre>
=={{header|PHP}}==
<syntaxhighlight lang
<syntaxhighlight lang
{{works with|PHP|5.3+}}
<syntaxhighlight lang="php">echo gethostname();</syntaxhighlight>
=={{header|PicoLisp}}==
This will just print the hostname:
<syntaxhighlight lang="picolisp">(call 'hostname)</syntaxhighlight>
To use it as a string in a program:
<syntaxhighlight lang="picolisp">(in '(hostname) (line T))</syntaxhighlight>
=={{header|Pike}}==
<syntaxhighlight lang="pike">import System;
int main(){
write(gethostname() + "\n");
}</syntaxhighlight>
=={{header|PL/SQL}}==
<syntaxhighlight lang="plsql">SET serveroutput on
BEGIN
DBMS_OUTPUT.PUT_LINE(UTL_INADDR.GET_HOST_NAME);
END;</syntaxhighlight>
=={{header|Pop11}}==
=={{header|PowerBASIC}}==
This retreives the localhost's name:
<syntaxhighlight lang="powerbasic">HOST NAME TO hostname$</syntaxhighlight>
This attempts to retreive the name of an arbitrary machine on the network (assuming ipAddress& is valid):
<syntaxhighlight lang="powerbasic">HOST NAME ipAddress& TO hostname$</syntaxhighlight>
=={{header|PowerShell}}==
Windows systems have the <code>ComputerName</code> environment variable which can be used:
<syntaxhighlight lang="powershell">$Env:COMPUTERNAME</syntaxhighlight>
Also PowerShell can use .NET classes and methods:
<syntaxhighlight lang="powershell">[Net.Dns]::GetHostName()</syntaxhighlight>
=={{header|PureBasic}}==
{{works with|PureBasic|4.41}}
<syntaxhighlight lang="purebasic">InitNetwork()
answer$=Hostname()</syntaxhighlight>
=={{header|Python}}==
{{works with|Python|2.5}}
<
host = socket.gethostname()</
=={{header|R}}==
Sys.info provides information about the platform that R is running on. The following code returns the hostname as a string.
<syntaxhighlight lang="r">Sys.info()[["nodename"]]</syntaxhighlight>
Note that Sys.info isn't guaranteed to be available on all platforms. As an alternative, you can call an OS command.
<syntaxhighlight lang="r">system("hostname", intern = TRUE)</syntaxhighlight>
... or retrieve an environment variable
<syntaxhighlight lang="r">
env_var <- ifelse(.Platform$OS.type == "windows", "COMPUTERNAME", "HOSTNAME")
Sys.getenv(env_var)
</syntaxhighlight>
=={{header|Racket}}==
<syntaxhighlight lang="racket">
#lang racket/base
(require racket/os)
(gethostname)
</syntaxhighlight>
=={{header|Raku}}==
(formerly Perl 6)
<syntaxhighlight lang="raku" line>my $host = qx[hostname];</syntaxhighlight>
=={{header|REBOL}}==
<syntaxhighlight lang="rebol">print system/network/host</syntaxhighlight>
=={{header|REXX}}==
===REGINA and PC/REXX under most MS NT Windows===
This REXX solution is for REGINA and PC/REXX under the Microsoft NT family of Windows (XP, Vista, 7, etc).
<br>Other names could be used for the 3rd argument.
<br><br>The ''computername'' is the same as the output for the '''hostname.exe''' program.
<syntaxhighlight lang="rexx">say value('COMPUTERNAME',,"ENVIRONMENT")
say value('OS',,"ENVIRONMENT")</syntaxhighlight>
'''output''' (using Windows/XP)
<pre>
GERARD46
Windows_NT
</pre>
===R4 and ROO under most MS NT Windows===
This REXX solution is for R4 and ROO under the Microsoft NT family of Windows (XP, Vista, 7, etc).
<br>Other names could be used for the 3rd argument.
<syntaxhighlight lang="rexx">say value('COMPUTERNAME',,"SYSTEM")
say value('OS',,"SYSTEM")</syntaxhighlight>
===MS DOS (without Windows), userid===
Under Microsoft DOS (with no Windows), the closest thing to a name of a host would be the userid.
<syntaxhighlight lang="rexx">say userid()</syntaxhighlight>
===MS DOS (without Windows), version of DOS===
But perhaps the name or version of the MS DOS system would be more appropriate than the userid.
<syntaxhighlight lang="rexx">'VER' /*this passes the VER command to the MS DOS system. */</syntaxhighlight>
Each REXX interpreter has their own name (some have multiple names) for the environmental variables.
<br>Different operating systems may call their hostnames by different identifiers.
<br>IBM mainframes (at one time) called the name of the host as a ''nodename'' and it needn't be
<br>specified, in which case an asterisk (*) is returned.
<br>I recall (perhaps wrongly) that Windows/95 and Windows/98 had a different environmental name for the name of the host.
===UNIX Solution===
This solution is platform specific and uses features that are available to the Regina implementation of Rexx.
:Tested with Regina on Mac OS X. Should work on other UNIX/Linux distros.
<syntaxhighlight lang="rexx">/* Rexx */
address command "hostname -f" with output stem hn.
do q_ = 1 to hn.0
say hn.q_
end q_
exit</syntaxhighlight>
=={{header|Ruby}}==
<
host = Socket.gethostname</
=={{header|Run BASIC}}==
<syntaxhighlight lang="runbasic">print Platform$ ' OS where Run BASIC is being hosted
print UserInfo$ ' Information about the user's web browser
print UserAddress$ ' IP address of the user</syntaxhighlight>
=={{header|Rust}}==
Works on windows and linux with crate <code>hostname</code> version 0.1.5
<syntaxhighlight lang="rust">fn main() {
match hostname::get_hostname() {
Some(host) => println!("hostname: {}", host),
None => eprintln!("Could not get hostname!"),
}
}</syntaxhighlight>
=={{header|Scala}}==
<syntaxhighlight lang="scala">println(java.net.InetAddress.getLocalHost.getHostName)</syntaxhighlight>
=={{header|Scheme}}==
{{works with|Chicken Scheme}}
<syntaxhighlight lang="scheme">(use posix)
(get-host-name)</syntaxhighlight>
{{works with|Guile}}
<syntaxhighlight lang="scheme">(gethostname)</syntaxhighlight>
=={{header|Seed7}}==
The library [http://seed7.sourceforge.net/libraries/socket.htm socket.s7i]
defines the function [http://seed7.sourceforge.net/libraries/socket.htm#getHostname getHostname],
which returns the hostname.
<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";
include "socket.s7i";
const proc: main is func
begin
writeln(getHostname);
end func;</syntaxhighlight>
=={{header|Sidef}}==
<syntaxhighlight lang="ruby">var sys = frequire('Sys::Hostname');
var host = sys.hostname;</syntaxhighlight>
Or:
<syntaxhighlight lang="ruby">var host = `hostname`.chomp;</syntaxhighlight>
=={{header|Slate}}==
<syntaxhighlight lang="slate">Platform current nodeName</syntaxhighlight>
=={{header|Slope}}==
<syntaxhighlight lang="slope">(hostname)</syntaxhighlight>
=={{header|Smalltalk}}==
{{works with|Smalltalk/X}}
<syntaxhighlight lang="smalltalk">OperatingSystem getHostName</syntaxhighlight>
=={{header|SNOBOL4}}==
<syntaxhighlight lang="snobol4">
output = host(4,"HOSTNAME")
end</syntaxhighlight>
=={{header|SQL}}==
{{works with|Oracle}}
<syntaxhighlight lang="sql">
select host_name from v$instance;
</syntaxhighlight>
=={{header|SQL PL}}==
{{works with|Db2 LUW}}
<syntaxhighlight lang="sql pl">
SELECT HOST_NAME FROM SYSIBMADM.ENV_SYS_INFO
</syntaxhighlight>
Output:
<pre>
HOST_NAME
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
hostname
1 record(s) selected.
</pre>
=={{header|Standard ML}}==
<syntaxhighlight lang="sml">NetHostDB.getHostName ()</syntaxhighlight>
=={{header|Swift}}==
Swift 3
<syntaxhighlight lang="swift">print(ProcessInfo.processInfo.hostName)</syntaxhighlight>
=={{header|Tcl}}==
The basic introspection tool in TCL is the <tt>info</tt> command. It can be used to find out about the version of the current Tcl or Tk, the available commands and libraries, variables, functions, the level of recursive interpreter invocation, and, amongst a myriad other things, the name of the current machine:
<syntaxhighlight
=={{header|Toka}}==
=={{header|TUSCRIPT}}==
<syntaxhighlight lang="tuscript">
$$ MODE TUSCRIPT
host=HOST ()
</syntaxhighlight>
=={{header|UNIX Shell}}==
<syntaxhighlight lang="bash">hostname</syntaxhighlight>
or
<syntaxhighlight lang="bash">uname -n</syntaxhighlight>
=={{header|Ursa}}==
<syntaxhighlight lang="ursa">out (ursa.net.localhost.name) endl console</syntaxhighlight>
=={{header|Ursala}}==
The user-defined hostname function ignores its argument and returns a string.
<syntaxhighlight lang="ursala">#import cli
hostname = ~&hmh+ (ask bash)/<>+ <'hostname'>!</syntaxhighlight>
For example, the following function returns the square root of its argument
if it's running on host kremvax, but otherwise returns the square.
<syntaxhighlight lang="ursala">#import flo
creative_accounting = (hostname== 'kremvax')?(sqrt,sqr)</syntaxhighlight>
=={{header|VBScript}}==
<syntaxhighlight lang="vb">
Set objNetwork = CreateObject("WScript.Network")
WScript.Echo objNetwork.ComputerName
</syntaxhighlight>
=={{header|Vim Script}}==
<syntaxhighlight lang="vim">echo hostname()</syntaxhighlight>
=={{header|Visual Basic}}==
{{works with|Visual Basic|5}}
{{works with|Visual Basic|6}}
{{works with|VBA|Access 97}}
{{works with|VBA|6.5}}
{{works with|VBA|7.1}}
<syntaxhighlight lang="vb">Option Explicit
Private Declare Function GetComputerName Lib "kernel32.dll" Alias "GetComputerNameW" _
(ByVal lpBuffer As Long, ByRef nSize As Long) As Long
Private Const MAX_COMPUTERNAME_LENGTH As Long = 31
Private Const NO_ERR As Long = 0
Private Function Hostname() As String
Dim i As Long, l As Long, s As String
s = Space$(MAX_COMPUTERNAME_LENGTH)
l = Len(s) + 1
i = GetComputerName(StrPtr(s), l)
Debug.Assert i <> 0
Debug.Assert l <> 0
Hostname = Left$(s, l)
End Function
Sub Main()
Debug.Assert Hostname() = Environ$("COMPUTERNAME")
End Sub</syntaxhighlight>
=={{header|V (Vlang)}}==
In Vlang, the "main()" entry point and declaration can be skipped in one file programs and when used like a script.
<syntaxhighlight lang="v (vlang)">import os
println(os.hostname())</syntaxhighlight>
=={{header|Wren}}==
Wren CLI doesn't currently expose a way to find the host name.
However, if Wren is embedded in (say) a suitable Go program, then we can ask the latter to get it for us.
<syntaxhighlight lang="wren">/* Hostname.wren */
class Host {
foreign static name() // the code for this is provided by Go
}
System.print(Host.name())</syntaxhighlight>
which we embed in the following Go program and run it.
{{libheader|WrenGo}}
<syntaxhighlight lang="go">/* Hostname.go */
package main
import (
wren "github.com/crazyinfin8/WrenGo"
"os"
)
type any = interface{}
func hostname(vm *wren.VM, parameters []any) (any, error) {
name, _ := os.Hostname()
return name, nil
}
func main() {
vm := wren.NewVM()
fileName := "Hostname.wren"
methodMap := wren.MethodMap{"static name()": hostname}
classMap := wren.ClassMap{"Host": wren.NewClass(nil, nil, methodMap)}
module := wren.NewModule(classMap)
vm.SetModule(fileName, module)
vm.InterpretFile(fileName)
vm.Free()
}</syntaxhighlight>
=={{header|zkl}}==
<syntaxhighlight lang="zkl">System.hostname</syntaxhighlight>
Or open a server socket, which contains the hostname.
<syntaxhighlight lang="zkl">Network.TCPServerSocket.open(8080).hostname</syntaxhighlight>
{{omit from|ACL2}}
{{omit from|Locomotive Basic|Does not have a hostname.}}
{{omit from|ML/I}}
{{omit from|PARI/GP}}
{{omit from|TI-83 BASIC}} {{omit from|TI-89 BASIC}} <!-- Does not have network access. -->
{{omit from|Unlambda|Does not have network access.}}
{{omit from|ZX Spectrum Basic|Does not have a hostname.}}
{{omit from|Commodore BASIC}}
| |||