Invalid character in windows file name

For instance, UDF is limited to Unicode 2. Filename maximum length is not standard and might depend on the code unit size. Although it is a serious issue, in most cases this is a limited one. On Linux, this means the filename is not enough to open a file: additionally, the exact byte representation of the filename on the storage device is needed.

This can be solved at the application level, with some tricky normalization calls. The issue of Unicode equivalence is known as 'normalized-name collision'. A solution is the Non-normalizing Unicode Composition Awareness used in the Subversion and Apache technical communities.

Paths are only normalized for the purpose of comparisons. Nonetheless, some communities have patented this strategy, forbidding its use by other communities. Those considerations create a limitation not allowing a switch to a future encoding different from UTF Within a single directory, filenames must be unique.

Since the filename syntax also applies for directories, it is not possible to create a file and directory entries with the same name in a single directory. Multiple files in different directories may have the same name. This means two separate files might be created with the same text filename and a different byte implementation of the filename, such as L'x00C0.

Some filesystems, such as FAT, store filenames as upper-case regardless of the letter case used to create them. For example, a file created with the name 'MyName. Txt' or 'myname. Any variation of upper and lower case can be used to refer to the same file. These kinds of file systems are called case-insensitive and are not case-preserving. Some filesystems prohibit the use of lower case letters in filenames altogether.

Some file systems store filenames in the form that they were originally created; these are referred to as case-retentive or case-preserving. Such a file system can be case-sensitive or case-insensitive. If case-sensitive, then 'MyName. Txt' and 'myname. On a case-insensitive, case-preserving file system, on the other hand, only one of 'MyName.

Txt', 'myname. TXT' can be the name of a file in a given directory at a given time, and a file with one of these names can be referenced by any capitalization of the name. From its original inception, Unix and its derivative systems were case-preserving.

Samba on most Unix-like systems , and SMB client file systems provide case-insensitive behavior. File system case sensitivity is a considerable challenge for software such as Samba and Wine, which must interoperate efficiently with both systems that treat uppercase and lowercase files as different and with systems that treat them the same.

File systems have not always provided the same character set for composing a filename. Before Unicode became a de facto standard, file systems mostly used a locale-dependent character set. By contrast, some new systems permit a filename to be composed of almost any character of the Unicode repertoire, and even some non-Unicode byte sequences. Limitations may be imposed by the file system, operating system, application, or requirements for interoperability with other systems.

Many file system utilities prohibit control characters from appearing in filenames. File system utilities and naming conventions on Windows prohibit particular characters from appearing in filenames: [15]. In Windows utilities, the space and the period are not allowed as the final character of a filename. Workarounds include appending a dot when renaming the file that is then automatically removed afterwards , using alternative file managers, or saving a file with the desired filename from within an application.

Some file systems on a given operating system especially file systems originally implemented on other operating systems , and particular applications on that operating system, may apply further restrictions and interpretations. Also, I'm not super confident in my PHP knowledge, but I think you'll need to double-escape the backslash: once because PHP treats it as an escape character in the string literal even when using single quotes , and a second time for the regex engine.

It looks like C uses the prefix to denote verbatim strings , which look like Python's raw strings , and should only need a single escape for the regex engine. JS does not yet seem to offer unescaped string literals, but RegExp literals don't apply the additional layer of escaping.

The URL is old. IndexOfAny Path. For Python3: import re re. Skip to content. Sign in Sign up. Instantly share code, notes, and snippets. This article will explain which characters can cause problems with files that use these characters. The two systems have much in common, but the characters permitted in a file or folder name may differ.

In the conventions listed below, it is true for both systems unless otherwise specified. Specifically there are cases where NTFS does not have the limitations see note below. In addition to these characters, the following conventions are also illegal: Placing a space at the end of the name Placing a period at the end of the name. I had a folder with a bad file name that I could not delete.

I was not looking forward to turning it on and having to index the entire drive or whatever, or to installing some shady software. When I extracted it, it created a folder …… […].

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