how to get the ppid of a process?

[chenminhua]

I want to let child process know if it's parent was killed, so I hope the child process can get it's ppid.
If ppid == 1, then i can know the parent has died.

But process module seems not having this prop or method

[mscdex]

This feature request would most likely have to be submitted to the libuv issue tracker as it would need to be added there first. Be aware though, Windows doesn't really have the same kind of support for parent pids like *nix does, in that you can only get the original parent process id (which may/may not have been assigned to another process if the original parent process has since died).

[bnoordhuis]

process.pid is implemented directly in node.js (src/node.cc), it doesn't go through libuv. I'm okay with adding a process.ppid property, I can see no reason not to.

[jayproulx]

Depending on your need, this is working for me, though I'm not looking for a specific PPID, I'm looking for a "stable" PPID that I can use for a "session" across multiple CLI commands. This may be the proper PPID for the current process, however, I think I saw that this was still a child process of bash.

var ppid = (require('child_process').execSync(ps -p ${process.pid} -o ppid=) + '').split('\n')[0];

[cjihrig]

@bnoordhuis the ppid implementation is kind of ugly on Windows. We happen to already have it in libuv though. Would you be opposed to me exposing it from there and using it here?

[cjihrig]

This will be available in the next libuv release, at which point I'll open a PR to expose it in Node.