Help of the DOS Command
Begins localization of environment changes in a batch file.
Environment changes made after SETLOCAL has been issued are local to the batch file. ENDLOCAL must be issued to restore the previous settings. When the end of a batch script is reached, an implied ENDLOCAL is executed for any outstanding
SETLOCAL commands issued by that batch script.:
If Command Extensions are enabled
SETLOCAL changes as follows:
``SETLOCAL`` batch command now accepts optional arguments:
- ENABLEEXTENSIONS / DISABLEEXTENSIONS:
enable or disable command processor extensions. These arguments takes precedence over the CMD
/E:OFFswitches. See CMD /? for details.
- ENABLEDELAYEDEXPANSION / DISABLEDELAYEDEXPANSION:
enable or disable delayed environment variable expansion. These arguments takes precedence over the CMD
/V:OFFswitches. See CMD /? for details.
These modifications last until the matching ENDLOCAL command, regardless of their setting prior to the
SETLOCAL command will set the
ERRORLEVEL value if given an argument. It will be zero if one of the two valid arguments is given and one otherwise. You can use this in batch scripts to determine if the extensions are available, using the following technique:
VERIFY OTHER 2>nul SETLOCAL ENABLEEXTENSIONS IF ERRORLEVEL 1 echo Unable to enable extensions
This works because on old versions of CMD.EXE,
SETLOCAL does NOT set the
ERRORLEVEL value. The VERIFY command with a bad argument initializes the
ERRORLEVEL value to a non-zero value.
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