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| -rw-r--r-- | doc/plugins/write.mdwn | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn index 99eea3d16..1a119b99b 100644 --- a/doc/plugins/write.mdwn +++ b/doc/plugins/write.mdwn @@ -629,6 +629,16 @@ A failure to write the file will result in it dying with an error. If the destination directory doesn't exist, it will first be created. +The filename and directory are separate parameters because of +some security checks done to avoid symlink attacks. Before writing a file, +it checks to make sure there's not a symlink with its name, to avoid +following the symlink. If the filename parameter includes a subdirectory +to put the file in, it also checks if that subdirectory is a symlink, etc. +The directory parameter, however, is not checked for symlinks. So, +generally the directory parameter is a trusted toplevel directory like +the srcdir or destdir, and any subdirectories of this are included in the +filename parameter. + #### `will_render($$)` Given a page name and a destination file name (not including the base |