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(zsh.info)Miscellaneous Features
Miscellaneous Features ====================== Configuration ------------- Various styles are available using the standard shell style mechanism, described in Note: The zsh/zutil Module. Briefly, the command `zstyle ':zftp:*' STYLE VALUE ...'. defines the STYLE to have value VALUE; more than one value may be given, although that is not useful in the cases described here. These values will then be used throughout the zftp function system. For more precise control, the first argument, which gives a context in which the style applies, can be modified to include a particular function, as for example `:zftp:zfget': the style will then have the given value only in the zfget function. Values for the same style in different contexts may be set; the most specific function will be used, where strings are held to be more specific than patterns, and longer patterns and shorter patterns. Note that only the top level function name, as called by the user, is used; calling of lower level functions is transparent to the user. Hence modifications to the title bar in zftp_chpwd use the contexts :zftp:zfopen, :zftp:zfcd, etc., depending where it was called from. The following styles are understood: progress Controls the way that zftp_progress reports on the progress of a transfer. If empty, unset, or `none', no progress report is made; if `bar' a growing bar of inverse video is shown; if `percent' (or any other string, though this may change in future), the percentage of the file transferred is shown. The bar meter requires that the width of the terminal be available via the $COLUMNS parameter (normally this is set automatically). If the size of the file being transferred is not available, bar and percent meters will simply show the number of bytes transferred so far. When zfinit is run, if this style is not defined for the context :zftp:*, it will be set to `bar'. update Specifies the minimum time interval between updates of the progress meter in seconds. No update is made unless new data has been received, so the actual time interval is limited only by $ZFTP_TIMEOUT. As described for progress, zfinit will force this to default to 1. remote-glob If set to `1', `yes' or `true', filename generation (globbing) is performed on the remote machine instead of by zsh itself; see below. titlebar If set to `1', `yes' or `true', zftp_chpwd will put the remote host and remote directory into the titlebar of terminal emulators such as xterm or sun-cmd that allow this. As described for progress, zfinit will force this to default to 1. chpwd If set to `1' `yes' or `true', zftp_chpwd will call the function chpwd when a connection is closed. This is useful if the remote host details were put into the terminal title bar by zftp_chpwd and your usual chpwd also modifies the title bar. When zfinit is run, it will determine whether chpwd exists and if so it will set the default value for the style to 1 if none exists already. Note that there is also an associative array zfconfig which contains values used by the function system. This should not be modified or overwritten. Remote globbing --------------- The commands for retrieving files usually perform filename generation (globbing) on their arguments; this can be turned off by passing the option -G to each of the commands. Normally this operates by retrieving a complete list of files for the directory in question, then matching these locally against the pattern supplied. This has the advantage that the full range of zsh patterns (respecting the setting of the option EXTENDED_GLOB) can be used. However, it means that the directory part of a filename will not be expanded and must be given exactly. If the remote server does not support the UNIX directory semantics, directory handling is problematic and it is recommended that globbing only be used within the current directory. The list of files in the current directory, if retrieved, will be cached, so that subsequent globs in the same directory without an intervening zfcd are much faster. If the remote-glob style (see above) is set, globbing is instead performed on the remote host: the server is asked for a list of matching files. This is highly dependent on how the server is implemented, though typically UNIX servers will provide support for basic glob patterns. This may in some cases be faster, as it avoids retrieving the entire list of directory contents. Automatic and temporary reopening --------------------------------- As described for the zfopen command, a subsequent zfopen with no parameters will reopen the connection to the last host (this includes connections made with the zfanon command). Opened in this fashion, the connection starts in the default remote directory and will remain open until explicitly closed. Automatic re-opening is also available. If a connection is not currently open and a command requiring a connection is given, the last connection is implicitly reopened. In this case the directory which was current when the connection was closed again becomes the current directory (unless, of course, the command given changes it). Automatic reopening will also take place if the connection was close by the remote server for whatever reason (e.g. a timeout). It is not available if the -1 option to zfopen or zfanon was used. Furthermore, if the command issued is a file transfer, the connection will be closed after the transfer is finished, hence providing a one-shot mode for transfers. This does not apply to directory changing or listing commands; for example a zfdir may reopen a connection but will leave it open. Also, automatic closure will only ever happen in the same command as automatic opening, i.e a zfdir directly followed by a zfget will never close the connection automatically. Information about the previous connection is given by the zfstat function. So, for example, if that reports: Session: default Not connected. Last session: ftp.bar.com:/pub/textfiles then the command zfget file.txt will attempt to reopen a connection to ftp.bar.com, retrieve the file /pub/textfiles/file.txt, and immediately close the connection again. On the other hand, zfcd .. will open the connection in the directory /pub and leave it open. Note that all the above is local to each session; if you return to a previous session, the connection for that session is the one which will be reopened. Completion ---------- Completion of local and remote files, directories, sessions and bookmarks is supported. The older, compctl-style completion is defined when zfinit is called; support for the new widget-based completion system is provided in the function Completion/Zsh/Command/_zftp, which should be installed with the other functions of the completion system and hence should automatically be available.
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