This is strace - a diagnostic, debugging and instructional userspace utility
with a traditional command-line interface for Linux. It is used to monitor
and tamper with interactions between processes and the Linux kernel, which
include system calls, signal deliveries, and changes of process state.
The operation of strace is made possible by the kernel feature known as ptrace.
strace is released under a Berkeley-style license at the request
of Paul Kranenburg; see the file COPYING for details.
See the file CREDITS for a list of authors and other contributors.
See the file INSTALL for compilation and installation instructions.
See the file NEWS for information on what has changed in recent versions.
The project's homepage is at
https://strace.io
strace has a mailing list:
strace-devel@lists.strace.io
System requirements:
* Linux kernel >= 2.6.18 is recommended. Older versions might still work
but they haven't been thoroughly tested with this release.
* Linux kernel >= 2.5.46 is required.
Older versions without a decent PTRACE_SETOPTIONS support will not work.
* On mips, Linux kernel >= 2.6.15 is required.
Older versions without a decent PTRACE_GETREGS support will not work.
* On s390 and s390x, Linux kernel >= 2.6.27 is required.
Older versions without a decent PTRACE_GETREGSET support will not work.