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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## *strict-probe-file*

When given a pathname in a directory that is not readable by the user running the Lisp process (because, for example, the user does not have read permission in that directory), probe-file should signal an error. (The ANS says "An error of type file-error is signaled if the file system cannot perform the requested operation.") However, Allegro CL (in common with other implementations of Common Lisp) has returned `nil` rather than signaling an error. Therefore, there is no programmatic way to distinguish between a file not existing and a file possibly existing, but in a directory that cannot be read by the user running Lisp.

This variable, `*strict-probe-file*`, controls the behavior of probe-file in this case. When `nil` (its initial value), probe-file returns `nil` when the argument path designates a file in an unreadable directory, preserving the behavior of earlier releases. When `*strict-probe-file*` is non-`nil`, probe-file signals an error in that case. (It also reports on what the access problems are.)

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This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version