ptrace (process trace system call) on Linux from D

[Matej Nanut]

Thank you for the reply, your recommendation works.

I could however not find ptrace anywhere in druntime.  There is 
only one mention of it in std.process, in a comment.

But I do have some other questions:

(1) Can I declare a ptrace function which calls the original 
ptrace?  (I would like to check the return value and errno for 
exception throwing and such).  I essentially want to shadow the 
original.

(2) Is it more D-ish to use something like "enum PTRequest { 
traceMe = 0, ... }" instead of the fully capitalised originals?  
It doesn't seem to affect the working of things.

(3) wait() is declared as returning a pid_t in the manpage, and 
is declared as such in core.sys.posix.sys.wait.  In std.c.process 
however, it returns an int.  I can't even find a process.h in my 
Linux install.  What am I supposed to use?  I know it essentially 
doesn't matter, as pid_t is aliased as int.

Are there D alternatives to wait() and fork() that I could use 
with ptrace() instead of the C posix system functions?

(4) Some things are declared only in core.*, not in std.*.  Will 
they be added at some point or is this how it's supposed to be?