Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Re^2: Changing parent process environment variable

by cdarke (Prior)
on Dec 20, 2007 at 21:42 UTC ( #658287=note: print w/replies, xml ) Need Help??


in reply to Re: Changing parent process environment variable
in thread Changing parent process environment variable

If it helps, this is how I have changed the PATH env. var. using some other weird obscure language (OK, C++). Sorry it is not in Perl, I hope this is enough for you to get the gist:
#define ENVNAME "Path" #define MAXLEN 1024 static void UpdatePath (char *szDir) { char szPath [MAXLEN]={0}; DWORD dwReturnValue; // Get previous value if ( !GetEnvironmentVariable (ENVNAME, szPath, MAX_PATH) ) ReportError ("GetEnvironmentVariable", GetLastError()); // Update path strcat (szPath, ";"); strcat (szPath, szDir); // On W2K we need OSVERSIONINFOEX OSVERSIONINFO OsVer; OsVer.dwOSVersionInfoSize = sizeof (OsVer); GetVersionEx (&OsVer); if ( OsVer.dwPlatformId == VER_PLATFORM_WIN32_NT ) { // Write to the user environment variables - // only exists on WNT/W2K! HKEY hEnv; dwReturnValue = RegOpenKeyEx (HKEY_CURRENT_USER, "Environment", 0, KEY_SET_VALUE, &hEnv) ; if ( dwReturnValue != ERROR_SUCCESS ) ReportError ("RegOpenKeyEx", dwReturnValue); dwReturnValue = RegSetValueEx (hEnv, ENVNAME, 0, REG_SZ, (BYTE*)szPath, strlen(szPath)+1); if ( dwReturnValue != ERROR_SUCCESS ) ReportError ("RegSetValueEx", dwReturnValue); RegFlushKey (hEnv); if ( hEnv ) RegCloseKey(hEnv); } // Tell the rest of the world (cmd line) if ( !SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM) "Environment", SMTO_ABORTIFHUNG, 5000, &dwReturnValue) ) { ReportError ("SendMessageTimeout", GetLastError()); } // Tell our children if ( !SetEnvironmentVariable (ENVNAME, szPath) ) ReportError ("SetEnvironmentVariable", GetLastError()); } // UpdEnv

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://658287]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (5)
As of 2023-02-06 12:22 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    I prefer not to run the latest version of Perl because:







    Results (34 votes). Check out past polls.

    Notices?