Re: [Help-bash] Question: Capturing command output (on-screen keyword colorizer/prettifier).

[Chet Ramey]

On 10/6/16 2:49 PM, Matthew Giassa wrote:
> Is it possible to hook the bash builtin malloc? I'm not explicitly
> calling calloc/malloc, so I wonder if it's something else that could be
> triggering this behavior, such as pthread_create. If that's the case, I
> guess I'll need to drop threads and instead issue an additional
> fork/exec call.

That's probably too difficult, since the bash malloc is statically linked
into the bash binary, and LD_PRELOAD can't see it.  It can shadow
functions bash gets from a dynamically-linked libc, but not something
static in the binary.

> Also, I had considered creating a pseudo terminal to intercept the data
> in place of the pipe approach I'm utilizing, but I believe BASh
> installed a SIGCHLD signal handler, so using grantpt would be error
> prone. Is this assumption correct?

Why would a SIGCHLD handler interfere with grantpt? Or are you worried
about signals interrupting your library's system calls?

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/