[gambit-list] checking for dangling symlink without raising an exception
Thomas Hafner
thomas at hafner.NL.EU.ORG
Wed Jan 11 14:16:17 EST 2006
Is it possible to check for a symlink without raising an exception,
even if the symling is dangling?
I think not, because:
- file-exists? cannot be used to check, because it evaluates to #f in
case of a dangling symlink.
- file-info cannot be used to check, because it raises an exception,
if there's nothing.
Here's an example:
(create-symbolic-link "/doesnotexist" "~/dangling")
;; worked, the symlink has been created.
(file-exists? "~/dangling")
;; evaluates to #f.
(create-symbolic-link "/anotherplace" "~/dangling")
;; ERROR: File exists.
(file-info "~/dangling")
;; ERROR: No such file or directory.
(file-info "~/dangling" #f)
;; Ok, informs about the symlink.
(delete-file "~/dangling")
(file-info "~/dangling" #f)
;; ERROR: No such file or directory.
I think it would be nice, if file-exists? had also an optional
parameter ``CHASE?'' like file-info has.
Regards
Thomas
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