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
       stappaths (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)