Get started with strace and debug faster
What you will see is the write line (Listing 10). In both the Perl and the C cases, what happens eventually is that a write call is made to output a string (the second argument in the method call) to the screen. In difference the case of Perl is that this is done via the interpreter, whereas in the case of C, it's the program itself that makes the call (but you can't tell this from the line, just from the context of it.)
01 write(1, "Hello World", 11) = 11
Once again, there's an exit_group call, but this time it's called on the write call (value 11, in my example), rather than on the interpreter (value 0), as in the Perl case.
This quick introduction shows some basic information that you can learn from studying system calls with strace. Also, you might want to try strace out on a "Hello World" Bash script, or you could also try running strace on short commands such as cd or pwd.
Buy this article as PDF
Linux Foundation's big event celebrates the 25th anniversary of Linux
Competitors get in the game with RHEL without Red Hat
Security researchers have already notified Microsoft; some fixes are available
The company is collaborating with Google and Intel to use Kubernetes as an engine for Fuel
Customers can take a free test drive of SLES for HPC on the Azure Cloud
San Francisco-based chip company announces their first fully open source chip platform.
The whole distro gets rebuilt on glibc 2.3
Ubuntu Vendor tries to solve app packaging and distribution problem across distributions.