September 2014
Intermediate to advanced
240 pages
5h 53m
English
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Using strace to clarify permission issues
The strace application is a popular debugging application on Linux systems. It allows developers and administrators to look at various system calls made by an application. As SELinux often has access controls on specific system calls, using strace can prove to be very useful in debugging permission issues.
How to do it…
To properly use strace, follow the next set of steps:
- Enable the
allow_ptraceBoolean:~# setsebool allow_ptrace on - Run the application with
strace:~$ strace -o strace.log -f -s 256 tmux - In the resulting logfile, look for the error message that needs to be debugged.
How it works…
The allow_ptrace Boolean (on some distributions, the inverse Boolean called deny_ptrace is available) needs to be ...
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