Search

5.7. Literals passed in from the stap command line

download PDF
Literals are either strings enclosed in double quotes (” ”) or integers. For information about integers, see Section Section 5.2.2, “Integers”. For information about strings, see Section Section 5.2.3, “Strings”.
Script arguments at the end of a command line are expanded as literals. You can use these in all contexts where literals are accepted. A reference to a nonexistent argument number is an error.

5.7.1. $1 … $<NN> for integers

Use $1 … $<NN> for casting as a numeric literal.

5.7.2. @1 … @<NN> for strings

Use @1 … @<NN> for casting as a string literal.

5.7.3. Examples

For example, if the following script named example.stp
probe begin { printf("%d, %s\n", $1, @2) }
is invoked as follows
# stap example.stp 10 mystring
then 10 is substituted for $1 and "mystring" for @2. The output will be
10, mystring
Red Hat logoGithubRedditYoutubeTwitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.

© 2024 Red Hat, Inc.