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ANSI Common Lisp  20 Files 20.2 Dictionary of Files
| 20.2.3 ensure-directories-exist |
Function |
- Syntax:
-
ensure-directories-exist
pathspec &key verbose
 pathspec, created
- Arguments and Values:
-
pathspec - a pathname designator.
verbose - a generalized boolean.
created - a generalized boolean.
- Description:
-
Tests whether the directories containing the specified file actually exist,
and attempts to create them if they do not.
If the containing directories do not exist and if verbose is true,
then the implementation is permitted (but not required)
to perform output to standard output saying what directories were created.
If the containing directories exist, or if verbose is false,
this function performs no output.
The primary value is the given pathspec so that this operation can
be straightforwardly composed with other file manipulation expressions.
The secondary value, created, is true if any directories were
created.
- Affected By:
-
The host computer's file system.
- Exceptional Situations:
-
An error of type file-error is signaled if the host, device, or directory
part of pathspec is wild.
If the directory creation attempt is not successful,
an error of type file-error is signaled;
if this occurs,
it might be the case that none, some, or all
of the requested creations have actually occurred
within the file system.
- See Also:
-
probe-file,
open,
Section 19.1.2 Pathnames as Filenames
- Allegro CL Implementation Details:
-
See cl:ensure-directories-exist implementation in implementation.html for information on the
implementation in Allegro CL.
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