Go to the first, previous, next, last section, table of contents.
The reaction to a readonly request may be one of the following:
show-pipe
-
The uncompressed data file is sent to the user program using a
pipe. This consumes very few resources, and it allows the decompression
to run in paralell with the user process, but it has the disadvantage
that the user program cannot use lseek. To warn the user program of
this, the data file is shown as a named pipe (FIFO) when it is
stat'ed.
use-tmp-file
-
This is the default setting. The data is uncompressed and put into a
temporary file. The user programs then reads its data from the temporary
file. This has the advantage that the user program may lseek, and the
disadvantage that more disk space is consumed, while the programming is
accessing the file.
hide-pipe
-
The data is sent through a pipe, but the file is shown as a regular file
("hidden") to the user program when it stats it. This might be needed
for programs which are picky about a file type, but who actually don't
need lseek.
leave-compressed
-
The virtual (uncompressed) file is shown as non-existent to stat, and
readdir shows the physical (compressed) file. For certain programs, this
is enough to disable zlibc on a file per file basis. This is useful, for
example, to make emacs use its own compression support (crypt.el)
instead of zlibc. Crypt.el is able to compress files when writing them
back, whereas zlibc isn't able to do so. The
leave-compressed
doesn't work correctly with the directory and subdirectory
criteria. Use the filesystem criterion instead.
dir-leave-compressed
-
The virtual (uncompressed) file is shown to stat, but readdir shows the
physical (compressed) file. This is useful to tell zlibc that we prefer
working on the physical file, but without making access to the virtual
file impossible. The
dir-leave-compressed doesn't work with the
dir and subdir criteria. Use the filesystem
criterion instead.
Go to the first, previous, next, last section, table of contents.