(Doesn’t work properly if _ appears in extension.): ren *_* *_NEW.*Ībcdef.jpg (Not renamed because it doesn't match sourceMask)Ībcd_123.a_b -> abcd_123.a_NEW (not desired, but no simple RENAME form will work in this case)Īny name can be broken up into components that are delimited by. (Obviously could add an additional ? on either end of targetMask to preserve names and extensions up to 6 chars long.): ren ?.?.* ?.?ġ23456.123456.123456 (Not renamed because it doesn't match sourceMask)Ĭhange characters after last _ in name and attempt to preserve extension. Same as above, but filter out files with initial name and/or extension longer than 5 chars so that they are not truncated.
BATCH FILE RENAME EXTENSION FULL
Note that adequate ? must be used to preserve the full existing name and initial extension: ren * ?.?ġ23456.123456.123456 -> 12345.12345 (note truncated name and extension because not enough `?` were used) Remove any extra extension after the initial extension. Substitute a character in the 1st and 3rd positions prior to any extension (adds a 2nd or 3rd character if it doesn’t exist yet) ren * A?Z*Ĭhange the (final) extension of every file: ren * *.txtĪppend an extension to every file: ren * *?.bak If the File was not found, could not be renamed or bad parameters %ERRORLEVEL% = 1 Examples If the File(s) were successfully renamed %ERRORLEVEL% = 0 Note that most programming languages use = assignments the other way around: Let dest=some_source_expressionįor this reason the use of = is not recommended in this context. Multiple delimiters are treated as one, so all the following are equivalent:
The delimiter between the source and target is normally a space but can be any of Comma, If 8.3 name generation is disabled then RENAME always gives the expected result. If 8.3 name generation is enabled, the SourceMask matches the original long name, the initial rename generates a short name that still matches SourceMask and sorts later in the alphabet, then this bug might be triggered.
If the result of the first rename operation still matches the SourceMask then the same file can be renamed twice. When 8.3 filenames exist then the SourceMask will first look for a match against the long file name, and then against the short file name. 8.3 Filename bug - a single command can rename the same file twice! It appears these same rules also work for the target name of the COPY commmand.
BATCH FILE RENAME EXTENSION WINDOWS
(Note: a valid Windows file/folder name cannot end with. Matches itself or it can match the end of name (nothing) if no more characters remain. It will match as little or as much as is needed to enable subsequent characters to match.Īll non-wildcard characters must match themselves, with a few special case exceptions. * Matches any 0 or more characters including. However it will match nothing without failure if at name end or if the next character is a. This wildcard is greedy - it always consumes the next character if it is not a. The wildcards work here the same as with any other command that filters file names. The sourceMask works as a filter to determine which files are renamed. TXT in the 'C:\demo\' folder and all sub-folders:įor /R %%G in (*.LOG) do Echo REN "%%G" "%% ~dpnG.TXT" RENAME is a synonym for REN Rename files within subdirectoriesīy default REN with a wildcard will only rename the files in a single folder, to recurse down into sub folders use a FOR /R command, after first changing to the top level directory.Į.g. If you issue a wildcard rename that matches only directories then a syntax error will be thrown. REN can also be used to rename directories, but this behaviour is undocumented.Ī simple REN folderA folderB will work, but wildcard operations are not supported for directories, if you issue a wildcard rename that matches both files and directories, the file(s) will be renamed and the folders will be ignored. Instead use " MOVE /y" to rename and replace an existing file. If TargetMask matches an existing file name, the following error message appears: Duplicate file name or file not found.Characters represented by wildcard characters in TargetMask will be identical to the corresponding characters in SourceMask.You cannot specify a new or different drive or path for TargetMask - use the MOVE command instead.REN SourceMask TargetMaskīoth the SourceMask and TargetMask can contain * and/or ? wildcards.Īs described below, the behavior of these wildcards is slightly different for a source or a target mask.
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