STAPVARS(3stap) STAPVARS(3stap)
NAME
stapvars - systemtap variables
DESCRIPTION
The following sections enumerate the public variables provided by standard tapsets installed, (the installation path is show in the stap-
paths(7) manual page). Each variable is described with a type, and its behavior/restrictions. The syntax is the same as printed with the
stap option -p2. Examples:
example1:long
Variable "example1" contains an integer.
example2:string [long]
Variable "example2" is an array of strings, indexed by integers.
ARGV
argc:long
Contains the value of the $# value: the number of command line arguments passed to the systemtap script. It is initialized with an
implicit begin(-1) probe.
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.
NULL
NULL:long
Simply defined as the number 0.
FILES
More files and their corresponding paths can be found in the stappaths(7) manual page.
SEE ALSO
stap(1) stappaths(7)
STAPVARS(3stap)