Chapter 1.1:  What's new in version 4.0

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1.1 Incompatible Changes in 4.0

For the most part, CML pages written for Caucus version 3.1 will work properly under version 4.0.  There is only one known change in version 4.0 that may cause incompatibilities.  The shell functions $shell(), $jshell(), $silent(), and $asynch() now always execute as the real userid of the Caucus subserver process (rather than, in some cases in 3.1, as the effective userid).

To run a shell command as the effective userid, use the new $xshell() function.

1.2 What's New in version 4.0

The following functions and features have been added since Caucus version 3.1.

New	item & response functions
	$re_epoch()	response time in seconds
	$re_bits()	special property bits of response
	$add_resp()	Expanded way to add a response
	$add_item()	Expanded way to add an item
	$re_copied()	Information about "copied" responses
	$re_copier()	Who copied a "copied" response?
New	logic, math, and string functions
	$bit_and()	bitwise and
	$bit_or()	bitwise or
	$bit_not()	bitwise negation
	$hex2dec()	hexadecimal to decimal conversion
	$dec2hex()	decimal to hexadecimal conversion
	$random()	Produce a random number
	$epoch()	Convert date to epoch timing
	$timezone()	Difference in seconds to UTC
	$dateof()	Convert epoch time to full date
	$quote()	quote text as one word
	$unquote()	undoes effect of $quote()
	$asc2dec()	decimal values of characters in string
New	conference creation and manipulation functions
	$create_conf()	create a new conference
	$co_remove()	delete an existing conference
	$co_makeorg()	add yourself as an organizer to a conference
	$set_co_org()	change primary organizer of a conference
	$co_rename()	rename a conference
	$jshell()	japanese shell output
	$xshell()	Comprehensive shell access function
New	file access functions
	$rename()	rename a file
	$dirlist()	list contents of a directory
	$delfile()	delete a file
	$file_data()	check contents of file against a range of values
New	CML directives and language features
	Eval	New directive (to replace "set ignore")
	Quit	Immediately cease CML page processing
	Macros	Dynamically defineable and expandable macros
New	system, license, and state information functions
	$admin_mail()	Administrator E-mail
	$opsys()	host server operating system
	$caucus_lib()	Caucus library directory path
	$disk_failure()	Did a disk-write error occur?
	$cml_path()	CML directory path
	$caucus_path()	full pathname of Caucus home directory
	$http_lib()	full URL of Caucus library directory
	$lice_max_users()	total # users allowed by license
	$lice_act_users()	actual # users
	$lice_expires()	epoch time when license expires
	$all_users()	list of all caucus userids
	$new_win()	set size of windows created by $t2url()
	$browser_format()	browser language code
	$set_browser_format()	set browser language code
New	sorting functions
	$gen_sort()	sort arbitrary list of words
	$num_sort()	sort arbitrary list of numbers
	$triplet_sort()	sort triplet list of item numbers
	$item_sort()	sort items by title, author, response date
New	management functions
	$mgr_list()	display list of managers and their capabilities
	$set_mgr_list()	set list of managers and capabilities
	$pw_...()	new password functions
	$per_delete()	delete person
New	miscellaneous functions
	$cl_visible()	is conference visible to this user?
	$clear...()	clear user/conf/item/site variable caches