.\" -*- nroff -*-
.TH STAPVARS 3stap @DATE@ "Red Hat"
.SH NAME
stapvars \- systemtap variables

.SH DESCRIPTION
The following sections enumerate the public variables provided by
standard tapsets installed under @prefix@/share/systemtap/tapset.  Each
variable is described with a type, and its behavior/restrictions.
The syntax is the same as printed with the 
.IR stap " option " \-p2 .
Examples:

.TP
example1:long
Variable "example1" contains an integer.

.TP
example2:string [long]
Variable "example2" is an array of strings, indexed by integers.

.SS ARGV

.TP
argc:long
Contains the value of the
.BR
$#
value: the number of command line arguments passed to the systemtap script.
It is initialized with an implicit begin(-1) probe.

.TP
argv:string [long]
Contains each command line argument as a string.  argv[1] will equal @1 if
there was at least one command line argument.  Arguments beyond #32 are not
transcribed, and produce a warning message within the begin(-1) probe that
initializes this array.

.SS NULL

.TP
NULL:long
Simply defined as the number 0.

.SH FILES
.nh
.IR @prefix@/share/systemtap/tapset
.hy

.SH SEE ALSO
.IR stap (1)