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Full Discussion: mkdir limitations
Top Forums UNIX for Dummies Questions & Answers mkdir limitations Post 26918 by Perderabo on Monday 26th of August 2002 08:20:52 AM
Old 08-26-2002
I did a "man mkdir" and I didn't find an answer to these questions.

The mkdir() system call code in the kernel does not directly impose a limit on the length of a filename. However it must talk to the code for filesystem and this will impose a limit. What that limit is depends on the file system. Posix will guarantee at least 14 characters. To be posix compliant, a unix system must allow at least that much. HP-UX still supports the "short filename" option. If you choose, you can make HP-UX enforce a 14 character limit. This is rarely done. The most common limit these days is 255 characters for a filename. And the most common limit for a full path name is 1023.

You probably will find that you have a pathconf() system call that can determine your exact limit. Note that you must give pathconf() a file name because the limits can vary from filesystem to filesystem.

Because a slash is used to separate the components of a pathname, a slash cannot be used inside a component. And binary zero is used to terminate a string. So no binary zeros either. Any other byte value is fair game as far as the kernel is concerned. A filename with an embedded carriage return will cause you nasty problems. And you really will be better off if you limit yourself to printable characters.
 

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gnomevfs-mkdir(1)						   User Commands						 gnomevfs-mkdir(1)

NAME
gnomevfs-mkdir - make a new directory at a VFS location SYNOPSIS
gnomevfs-mkdir URI DESCRIPTION
gnomevfs-mkdir makes a new directory at a URI location that supports the creation of new directories. OPERANDS
The following operands are supported: URI Specifies the location of the new directory in standard URI format. EXAMPLES
Example 1: Making a New Directory in the Home Directory example% gnomevfs-mkdir file:///home/user/newdir ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables: NLSPATH. EXIT STATUS
The exit value 0 is returned regardless of success or failure. FILES
The following files are used by this application: /usr/bin/gnomevfs-mkdir Executable to make a new directory at a VFS location ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWgnome-vfs | +-----------------------------+-----------------------------+ |Interface stability |External | +-----------------------------+-----------------------------+ SEE ALSO
gnomevfs-cat(1), gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1) NOTES
Written by Stephen Browne, Sun Microsystems Inc., 2004. SunOS 5.10 6 Sep 2004 gnomevfs-mkdir(1)
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