File selection Criteria

The criterion describes what parts of the filename should match:

filename

The entire filename of the target data file must match name.

basename

The basename (filename without directory) of the target data file must match name.

directory

The data file must live in the directory name. If the user program opens the file with an absolute pathname, that filename is used as is. If on the other hand the user program uses a relative pathname, zlibc uses the most direct path to the file (i.e. without symlinks).

subdirectory

The data file must live in the directory name or in one of its subdirectories. If the user program opens the file with an absolute pathname, that filename is used as is. If on the other hand the user program uses a relative pathname, zlibc uses the most direct path to the file (i.e. without symlinks).

suffix

The data file's name must end in name. This is useful for selecting files according to their extension.

filesystem

The data file must live on the same filesystem as name. This criterion can for example be used for example to disable zlibc on a doublespaced filesystem (where zlibc would be redundant), or to switch off uncompressed size reporting on an ftpfs filesystems (4).

default

All data files match. All class definitions must have a default line, and this default line must be the last line of the definition. The default criterion needs no 'name' parameter.

all

All data files match. Unlike default, this line needs not to be the last line of the class definitions. Thus it is possible to specify several all lines for different aspects of zlibc behaviour.

The lines of each class definition are scanned in sequence, and, for each aspect(5), the first matching line is adopted. The class may be defined in another initialisation file, if this file is scanned later. The criterion parameter may be omitted if it can be deduced from the name. In that case, the following heuristics are used:

• Names beginning with a dot are considered as suffix.
• Names beginning with a slash, but not ending with a slash are considered as filename.
• Names beginning and ending with a slash are considered as subdirectory.
• A missing name is considered as default.
• All the other names are considered as basename.

filesystem criteria, because these tend to be more predictable.

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