progenyof
Checks whether a calling process is in the progeny of a specified process ID.
int progenyof(pid_t)
The progenyof
function returns non-zero if the calling process is among
the progeny of the specified process ID. The calling process is the process associated with
the thread that triggers the matched probe.
Example 7-35 How to use progenyof to limit a clause to list the write system calls for all child processes of a specified process ID
syscall::write:entry
/progenyof($1)/
{
@[pid,execname,probefunc]=count()
}
This script could be run as follows, to monitor all the system calls that are triggered by a running instance of an application, such as the gnome-terminal-server:
sudo dtrace -n 'syscall::write:entry /progenyof($1)/
{@[pid,execname,probefunc]=count()}' $(pidof gnome-terminal-server)