Creating implementation for idiom 105 : Current executable name

Idiom

# 105 Current executable name

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Assign to the string s the name of the currently executing program (but not its full path).

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with Ada.Command_Line; use Ada.Command_Line;
with Ada.Directories; use Ada.Directories;

S : String := (Simple_Name (Command_Name));

#include <string.h>

#ifdef _WIN32
#define PATH_SEP '\\'
#else
#define PATH_SEP '/'
#endif

int main(int argc, char* argv[])
{
    char *s = strchr(argv[0], PATH_SEP);
    s = s ? s + 1 : argv[0];

    return 0;
}

#include <iostream>
#include <filesystem>


int main(int argc, char* argv[])
{
    std::cout << std::filesystem::path(argv[0]).filename() << '\n';
}

using System;
using System.IO;

var path=Environment.CommandLine;
var s=Path.GetFileName(path);

import std.path;

void main(string[] args) {
    string s = args[0].baseName;
}

import 'dart:io';

var s = File(Platform.resolvedExecutable).uri.pathSegments.last;

program p
implicit none
character(len=:),allocatable :: s
integer                      :: stat,l,i,j,k
 call get_command_argument (0,length=l)
 allocate(character(len=l) :: s)
 call get_command_argument (0,s,status=stat)
 if (stat == 0) then
  i=index(s,'/',back=.true.)
  j=index(s,'\',back=.true.)
  k=max(i,j)
  if(k.ne.0)s=s(k+1:)
  print *, "The program's name is " // trim (s)
 endif
end program p

import "os"
import "path/filepath"

path := os.Args[0]
s = filepath.Base(path)

Demo
Doc

import (
  "os"
  "path/filepath"
)

path, err := os.Executable()
if err != nil {
  panic(err)
}
s = filepath.Base(path)

Demo
Doc

import System.Environment

s <- getProgName

var s = process.argv0;

String s = System.getProperty("sun.java.command");

Demo
Origin

s = arg[0]

Demo

$s = $_SERVER['PHP_SELF'];

s := ExtractFileName(ParamStr(0));

my $s = $0;

import sys

s = sys.argv[0]

s = $0

s = __FILE__

let s = std::env::current_exe()
    .expect("Can't get the exec path")
    .file_name()
    .expect("Can't get the exec name")
    .to_string_lossy()
    .into_owned();

Demo
Doc

fn get_exec_name() -> Option<String> {
    std::env::current_exe()
        .ok()
        .and_then(|pb| pb.file_name().map(|s| s.to_os_string()))
        .and_then(|s| s.into_string().ok())
}

fn main() -> () {
    let s = get_exec_name().unwrap();
    println!("{}", s);
}

Demo

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