How to check if a file exists from inside a batch file
I need to run a utility only if a certain file exists. How do I do this in Windows batch?
if exist <insert file name here> ( rem file exists ) else ( rem file doesn't exist )
Or on a single line (if only a single action needs to occur):
if exist <insert file name here> <action>
for example, this opens notepad on autoexec.bat, if the file exists:
if exist c:\autoexec.bat notepad c:\autoexec.bat
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Performs conditional processing in batch programs.
IF [NOT] ERRORLEVEL number command
IF [NOT] string1==string2 command
IF [NOT] EXIST filename command
Try something like the following example, quoted from the output of
IF /? on Windows XP:
IF EXIST filename. ( del filename. ) ELSE ( echo filename. missing. )
You can also check for a missing file with
IF NOT EXIST.
IF command is quite powerful. The output of
IF /? will reward careful reading. For that matter, try the
/? option on many of the other built-in commands for lots of hidden gems.