there's no sudo command in cygwin

Question

Because there's no sudo command in Cygwin, scripts that I want to run fail with

./install.sh: line N: sudo: command not found

What's the standard way for getting around this? Editing the scripts to remove sudo? Getting some sudo-like tool for windows?

Answer 1

One way is to create a fake "sudo" command with the following content:

#!/usr/bin/bash

"$@"

This will allow the install.sh to continue, because sudo is found.

This doesn't elevate privileges like real sudo does. If you really need elevated privileges start cygwin shell with from an account with administrative privileges (XP) or r-click on cygwin.bat and "run as administrator" (Vista,Win7)

Answer 2

Sudo(Elevate) for Windows™

I do a lot of work on the command line in Windows™.
In cygwin itself i believe you can run a root command with su -c /the/cmd as for sudo itself within Windows™ file-system elevating the users permissions from the command line, If you are an Administrator this will work great for you otherwise use runas and get admin's pass ;).
Now I cannot remember where we got this code but here it is. Hope it helps.

BTW. package we use to compile this was gcc-mingw32

$ i586-mingw32msvc-gcc sudo.c -o sudo.exe
# put sudo.exe in /usr/bin or in your windows path (%homedrive%\windows)
#example:
$ sudo vi /cygdrive/c/windows/system32/drivers/etc/hosts

/**
* (sudo for Windows™)
* @filename sudo.c
*/
#ifndef UNICODE
#define UNICODE
#endif
#include <windows.h>
#include <shellapi.h>
#include <wchar.h>
LPWSTR *mergestrings(LPWSTR *left, LPCWSTR right)
{
    size_t size = ( 1 + lstrlen(*left) + lstrlen(right) ) * sizeof(LPWSTR*);
    if ( *left ) {
        LPWSTR leftcopy = _wcsdup(*left);
        *left = (LPWSTR)realloc(*left, size);
        *left = lstrcpy(*left, leftcopy);
        *left = lstrcat(*left, right);
        free( leftcopy );
    } else *left = _wcsdup(right);
    return left;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE prevInstance, LPSTR lpcommand, int nShowCmd)
{
    DWORD result = 0x2a;
    LPWSTR *argv = NULL;
    int argc = 0;
    if ( argv = CommandLineToArgvW(GetCommandLineW(), &argc) ) {
        if ( argc < 2 ) {
            LPWSTR usagemsg = NULL;
            usagemsg = *mergestrings(&usagemsg, argv[0]);
            usagemsg = *mergestrings(&usagemsg, TEXT(" <command_to_run> [arguments]"));
            MessageBox(NULL, usagemsg, TEXT("Usage:"), MB_OK | MB_ICONEXCLAMATION );
            LocalFree( argv );
            free( usagemsg );
            return ERROR_BAD_ARGUMENTS;
        } else {
            LPWSTR command = argv[1];
            LPWSTR arguments = NULL;
            int c;
            for ( c = 2; c < argc; c++ ) {
                arguments = *mergestrings(&arguments, argv[c]);
                arguments = *mergestrings(&arguments, TEXT(" "));
            }
            result = (DWORD)ShellExecute(NULL, TEXT("runas"), command, arguments, NULL, SW_SHOWNORMAL);
            LocalFree( argv );
            if ( arguments ) free( arguments );
            switch ( result )
            {
                case 0:
                    result = ERROR_OUTOFMEMORY; 
                    break;

                case 27:
                case 31: 
                    result = ERROR_NO_ASSOCIATION;
                    break;

                case 28:
                case 29:
                case 30: 
                    result = ERROR_DDE_FAIL;
                    break;
                case 32:
                    result = ERROR_DLL_NOT_FOUND;
                    break;
                default:
                    if ( result > 32 ) result = 0x2a;
            }
        }
    } else result = GetLastError(); 
    if (result != 0x2a) {
        LPWSTR errormsg = NULL;
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,
                      NULL, result, 0, (LPWSTR)&errormsg, 0, NULL);
        MessageBox(NULL, errormsg, TEXT("Error:"), MB_OK | MB_ICONERROR);
        LocalFree( errormsg );
        return result;
    }  else return NO_ERROR;
}

Answer 3

Windows 7: Launch Cygwin.bat by right-click and "Run as administrator".