waitpid and grandchildren Post: 302642877

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Top Forums Programming waitpid and grandchildren Post 302642877 by otheus on Friday 18th of May 2012 06:35:48 AM

05-18-2012

Registered User

Quote:

Once I get the final PID of the daemon in question, I detach from it with a PTRACE_DETACH and let it run unhindered.

My understanding is that once you detach a process, you no longer get signals like SIGCHLD on its behalf.

But the idea of using ptrace for this kind of thing seems novel to me.

Quote:

can I monitor a given grandchild process without becoming the init process

. DJ Bernstein's Daemontools offers a solution. You leave a file-descriptor open to the grandparent (so your monitoring program never truly detaches).

otheus

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LEARN ABOUT DEBIAN

pgrphack

pgrphack(8)						      System Manager's Manual						       pgrphack(8)

NAME

       pgrphack - runs a program in a separate process group.

SYNOPSIS

       pgrphack child

DESCRIPTION

       pgrphack runs child in a new process group.

SEE ALSO

       supervise(8),  svc(8),  svok(8),  svstat(8), svscanboot(8), svscan(8), readproctitle(8), fghack(8), multilog(8), tai64n(8), tai64nlocal(8),
       setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)

       http://cr.yp.to/daemontools.html

																       pgrphack(8)