5.13 File Security-Guard Checks
| (require ffi/file) | package: base |
procedure
(security-guard-check-file who path perms) → void?
who : symbol? path : path-string? perms : (listof (or/c 'read 'write 'execute 'delete 'exists))
Checks whether (current-security-guard) permits access to the
file specified by path with the permissions
perms. See make-security-guard for more information
on perms.
The symbol who should be the name of the function on whose behalf the security check is performed; it is passed to the security guard to use in access-denied errors.
procedure
(_file/guard perms [who]) → ctype?
perms : (listof (or/c 'read 'write 'execute 'delete 'exists)) who : symbol? = '_file/guard
Like _file and _path, but conversion from Racket to
C first completes the path using path->complete-path then
cleanses it using cleanse-path, then checks that the current
security guard grants access on the resulting complete path with
perms. As an output value, identical to _path.