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129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*
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* SET.C - set internal command.
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*
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*
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* History:
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*
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* 06/14/97 (Tim Norman)
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* changed static var in set() to a malloc'd space to pass to putenv.
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* need to find a better way to do this, since it seems it is wasting
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* memory when variables are redefined.
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*
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* 07/08/1998 (John P. Price)
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* removed call to show_environment in set command.
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* moved test for syntax before allocating memory in set command.
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* misc clean up and optimization.
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*
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* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* added config.h include
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*
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* 28-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* added set_env function to set env. variable without needing set command
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*
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* 09-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Added help text ("/?").
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*
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* 24-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Fixed Win32 environment handling.
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* Unicode and redirection safe!
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*
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* 25-Feb-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Fixed little bug.
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*/
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#include "config.h"
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#ifdef INCLUDE_CMD_SET
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#include <windows.h>
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#include <tchar.h>
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#include <string.h>
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#include <stdlib.h>
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#include "cmd.h"
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/* initial size of environment variable buffer */
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#define ENV_BUFFER_SIZE 1024
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INT cmd_set (LPTSTR cmd, LPTSTR param)
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{
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LPTSTR p;
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if (!_tcsncmp (param, _T("/?"), 2))
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{
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ConOutPuts (_T("Displays, sets, or removes environment variables.\n\n"
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"SET [variable[=][string]]\n\n"
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" variable Specifies the environment-variable name.\n"
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" string Specifies a series of characters to assign to the variable.\n\n"
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"Type SET without parameters to display the current environment variables.\n"));
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return 0;
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}
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/* if no parameters, show the environment */
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if (param[0] == _T('\0'))
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{
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LPTSTR lpEnv;
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LPTSTR lpOutput;
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INT len;
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lpEnv = (LPTSTR)GetEnvironmentStrings ();
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if (lpEnv)
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{
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lpOutput = lpEnv;
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while (*lpOutput)
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{
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len = _tcslen(lpOutput);
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if (len)
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{
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if (*lpOutput != _T('='))
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ConOutPuts (lpOutput);
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lpOutput += (len + 1);
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}
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}
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FreeEnvironmentStrings (lpEnv);
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}
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return 0;
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}
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p = _tcschr (param, _T('='));
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if (p)
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{
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/* set or remove environment variable */
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*p = _T('\0');
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p++;
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SetEnvironmentVariable (param, p);
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}
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else
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{
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/* display environment variable */
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LPTSTR pszBuffer;
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DWORD dwBuffer;
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pszBuffer = (LPTSTR)malloc (ENV_BUFFER_SIZE * sizeof(TCHAR));
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dwBuffer = GetEnvironmentVariable (param, pszBuffer, ENV_BUFFER_SIZE);
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if (dwBuffer == 0)
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{
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ConErrPrintf ("CMD: Not in environment \"%s\"\n", param);
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return 0;
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}
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else if (dwBuffer > ENV_BUFFER_SIZE)
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{
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pszBuffer = (LPTSTR)realloc (pszBuffer, dwBuffer * sizeof (TCHAR));
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GetEnvironmentVariable (param, pszBuffer, dwBuffer * sizeof (TCHAR));
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}
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ConOutPrintf ("%s\n", pszBuffer);
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free (pszBuffer);
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return 0;
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}
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return 0;
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}
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#endif
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