Summary of Built-in Functions

Table 1. File Handling Functions
Function	Description
file.cat	Returns the contents of a file.
file.escape	Returns an escaped or safe version of the input string.
file.exists	Checks to see if a file exists on the filesystem.
file.head	Returns the first line of the file.
file.mkdir	Create a directory on the filesystem.
file.rm	Removes a file from the filesystem.
file.rmdir	Removes a directory from the filesystem.
file.size	Returns the size of a file.
file.tail	Return the last line of a file or the last number(n) of lines of a file.
file.touch	Create a file if it does not already exist.

Miscellaneous Functions

Table 2. Miscellaneous Functions
Function	Description
Server Configuration	Examine configuration items.
length	Get the length of data.
Miscellaneous	Functions to execute. regular expression search on string, using pattern.
module.call	Call a virtual module
rand	Generate random integers.

Pair Manipulation

Table 3. Pair Manipulation
Function	Description
debug	Print attributes to the debug output.
immutable	Mark attributes as immutable (cannot be changed).
print	Print attribute name and value to string.

Table 4. Profiling Functions
Function	Description
callgrind.start	Switch callgrind instrumentation on.
callgrind.stop	Switch callgrind instrumentation off.
callgrind.dump	Write a callgrind profile dump, then zero the costs.
callgrind.zero	Zero the callgrind costs without writing a dump.
gperftools.start	Start the gperftools CPU profiler, writing samples to a file.
gperftools.stop	Write buffered gperftools samples, then stop the profiler.
gperftools.flush	Write buffered gperftools samples and keep the profiler running.

String Manipulation

Table 5. String manipulation
Function	Description
concat	Concatenate strings with delimiters.
split	Split a string based on delimiters.
length	Returns the size of the data.
lpad	Left pad a string.
rpad	Right pad a string.
rand	Return a random string .based on input format
lower	Convert the input string. to lowercase.
upper	Convert the input string. to uppercase

Time Management

Table 6. Time Management
Function	Description
character	Single character. expansions
time	Generic (too complex). time function
is_dst	Is the system running in DST?.
now	Return the current time.
offset	Return UTC offset.
request	Return the time when the request was received.

IPv4 Handling

Table 7. IPv4 handling
Function	Description
broadcast	Get the broadcast address from an IPv4 prefix
netmask	Get the netmask from an IPv4 prefix