how to run some c code for every real and forked ruby process

[Ben Myles]

I have some C code (shown below) which I want executed every time ruby
runs (it spawns a monitoring script that monitors the ruby process).

I tried placing the code in main.c, and this works fine at first
glance. However, if I fork something from within ruby the newly forked
process doesn't get monitored (which is also why I can't just write a
simple bash ruby wrapper).

Could someone point me to a function in the ruby source where I can
insert the code so that it would be run once for both real processes
and forked children?

I'm no C programmer, so I'm a bit out of my league here ;-)

int monitor_pid =3D getpid();
char monitor_buffer[100];
sprintf(monitor_buffer, "/usr/local/bin/monitor %i &", monitor_pid);
system(monitor_buffer);

Thanks!

Ben

 

[Eric Hodel]

I have some C code (shown below) which I want executed every time ruby
runs (it spawns a monitoring script that monitors the ruby process).

I tried placing the code in main.c, and this works fine at first
glance. However, if I fork something from within ruby the newly forked
process doesn't get monitored (which is also why I can't just write a
simple bash ruby wrapper).

Could someone point me to a function in the ruby source where I can
insert the code so that it would be run once for both real processes
and forked children?

I'm no C programmer, so I'm a bit out of my league here ;-)

int monitor_pid = getpid();
char monitor_buffer[100];
sprintf(monitor_buffer, "/usr/local/bin/monitor %i &",
monitor_pid);
system(monitor_buffer);

No need for C.

BEGIN {
system "/usr/local/bin/monitor #{$$} &"
}

 

[Ara.T.Howard]

I have some C code (shown below) which I want executed every time ruby
runs (it spawns a monitoring script that monitors the ruby process).

I tried placing the code in main.c, and this works fine at first
glance. However, if I fork something from within ruby the newly forked
process doesn't get monitored (which is also why I can't just write a
simple bash ruby wrapper).

Could someone point me to a function in the ruby source where I can
insert the code so that it would be run once for both real processes
and forked children?

I'm no C programmer, so I'm a bit out of my league here ;-)

int monitor_pid = getpid();
char monitor_buffer[100];
sprintf(monitor_buffer, "/usr/local/bin/monitor %i &", monitor_pid);
system(monitor_buffer);

No need for C.

BEGIN {
system "/usr/local/bin/monitor #{$$} &"
}

does this work for forked children? i'm guessing not - but i'm maybe the
monitor program does that?

-a
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