Chen Jingpiao's GSoC status report - #12 of #13

[Chen Jingpiao]

Hello, strace community!

Accomplishment:
	* Debug tests/qual_inject-signal.test, the test fail for seccomp stop
	can not inject signal
	* Set seccomp trace ipc(), socketcall() and syscall() system call by default [1]
	* Set enable_seccomp_filter = false [2] by default and update option parser
	* Write a simple test [3]
	* Write a blog to demonstrate my work (draft) [4]

In the following case, we should not enable seccomp filter:

	* strace -p: only when use execve to execute a program can we initialize seccomp
	* strace -einject: seccomp stop can not inject signal
	* strace TRACER(like strace): if enable seccomp filter, we will trace
	the tracee's child process, so the tracee's child process call
	ptrace(PTRACE_TRACEME) fail

[1] https://github.com/ppiao/strace/blob/ppiao/next/filter_seccomp.c#L136-L140
[2] https://github.com/ppiao/strace/blob/ppiao/next/filter_seccomp.c#L43-L43
[3] https://github.com/ppiao/strace/commit/ef0574f16c663c3ed3eb3095a1d6577f0ef8250f
[4] https://ppiao.github.io/2018/08/07/strace-gsoc-2018.html

--
Chen Jingpiao