TclZipfs_AppHook, Tclzipfs_Mount, TclZipfs_MountBuffer, Tclzipfs_Unmount — handle ZIP files as Tcl virtual filesystems
- TclZipfs_AppHook, Tclzipfs_Mount, TclZipfs_MountBuffer, Tclzipfs_Unmount — handle ZIP files as Tcl virtual filesystems
- TclZipfs_AppHook(argcPtr, argvPtr)
- Tclzipfs_Mount(interp, mountpoint, zipname, password)
- TclZipfs_MountBuffer(interp, mountpoint, data, dataLen, copy)
- Tclzipfs_Unmount(interp, mountpoint)
- SEE ALSO
Tclzipfs_Mount(interp, mountpoint, zipname, password)
TclZipfs_MountBuffer(interp, mountpoint, data, dataLen, copy)
TclZipfs_AppHook is a utility function to perform standard application
initialization procedures, taking into account available ZIP archives as
- int *argcPtr (in)
Pointer to a variable holding the number of command line arguments from
- char ***argvPtr (in)
Pointer to an array of strings containing the command line arguments to
- Tcl_Interp *interp (in)
Interpreter in which the ZIP file system is mounted. The interpreter's result is
modified to hold the result or error message from the script.
- const char *zipname (in)
Name of a ZIP file. Must not be NULL when either mounting or unmounting a ZIP.
- const char *mountpoint (in)
Name of a mount point, which must be a legal Tcl file or directory name. May
be NULL to query current mount points.
- const char *password (in)
An (optional) password. Use NULL if no password is wanted to read the file.
- unsigned char *data (in)
A data buffer to mount. The data buffer must hold the contents of a ZIP
archive, and must not be NULL.
- size_t dataLen (in)
The number of bytes in the supplied data buffer argument, data.
- int copy (in)
If non-zero, the ZIP archive in the data buffer will be internally copied
before mounting, allowing the data buffer to be disposed once
TclZipfs_MountBuffer returns. If zero, the caller guarantees that the
buffer will be valid to read from for the duration of the mount.
If the current application has a mountable ZIP archive, that archive is
mounted under ZIPFS_VOLUME/app as a read-only Tcl virtual file
system. ZIPFS_VOLUME is usually //zipfs: on all platforms, but
zipfs: may also be used on Windows (due to differences in the
platform's filename parsing).
If a file named main.tcl is located in the root directory of that file
system (i.e., at ZIPROOT/app/main.tcl after the ZIP archive is
mounted as described above) it is treated as the startup script for the
If the file ZIPROOT/app/tcl_library/init.tcl is present, the
tcl_library global variable in the initial Tcl interpreter is set to
If the directory tcl_library was not found in the main application
mount, the system will then search for it as either a VFS attached to the
application dynamic library, or as a zip archive named
libtcl_major_minor_patchlevel.zip either in the
present working directory or in the standard Tcl install location. (For
example, the Tcl 8.7.2 release would be searched for in a file
libtcl_8_7_2.zip.) That archive, if located, is also mounted read-only.
On Windows, TclZipfs_AppHook has a slightly different signature, since
it uses WCHAR in stead of char. As a result, it requires your application to
be compiled with the UNICODE preprocessor symbol defined (e.g., via the
-DUNICODE compiler flag).
The result of TclZipfs_AppHook is a Tcl result code (e.g., TCL_OK
when the function is successful). The function may modify the variables
pointed to by argcPtr and argvPtr to remove arguments; the
current implementation does not do so, but callers should not assume
that this will be true in the future.
Tclzipfs_Mount mounts the ZIP archive zipname on the mount point
given in mountpoint using the optional ZIP password password.
Errors during that process are reported in the interpreter interp. If
mountpoint is a NULL pointer, information on all currently mounted ZIP
file systems is written into interp's result as a sequence of mount
points and ZIP file names. The result of this call is a standard Tcl result
Tclzipfs_MountBuffer mounts the ZIP archive in the buffer pointed to by
data on the mount point given in mountpoint. The ZIP archive is
assumed to be not password protected. Errors during that process are reported
in the interpreter interp. The copy argument determines whether
the buffer is internally copied before mounting or not. The result of this
call is a standard Tcl result code.
Tclzipfs_Unmount undoes the effect of Tclzipfs_Mount, i.e., it
unmounts the mounted ZIP file system that was mounted from zipname (at
mountpoint). Errors are reported in the interpreter interp. The
result of this call is a standard Tcl result code.
TclZipfs_AppHook can not be used in stub-enabled extensions.
compress, filesystem, zip
Copyright © 2015 Jan Nijtmans <jan.nijtmans(at)gmail.com>
Copyright © 2015 Christian Werner <chw(at)ch-werner.de>
Copyright © 2017 Sean Woods <yoda(at)etoyoc.com>