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STAPVARS(3stap) |
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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.
-