foot/reaper.h

#pragma once

#include <stdbool.h>
#include <sys/wait.h>

#include "fdm.h"

struct reaper;

struct reaper *reaper_init(struct fdm *fdm);
void reaper_destroy(struct reaper *reaper);

typedef bool (*reaper_cb)(struct reaper *reaper, pid_t pid, void *data);

void reaper_add(struct reaper *reaper, pid_t pid, reaper_cb cb, void *cb_data);
void reaper_del(struct reaper *reaper, pid_t pid);
reaper: new module, uses a signalfd to wait() on child processes Use a signalfd to listen for SIGCHLD signals. When we receive a SIGCHLD over the signalfd, reap all dead children by looping over all registered child PIDs and call waitpid(WNOHANG) on them. 2020-05-21 20:15:10 +02:00			`#pragma once`

reaper: add optional callback When calling ‘reaper_add()’, the caller can provide a callback. If non-NULL, the reaper will call the callback to handle the actual reaping. If the callback is NULL, or if it returns false, the reaper reaps the child process. 2020-12-26 01:26:54 +01:00			`#include <stdbool.h>`
reaper: new module, uses a signalfd to wait() on child processes Use a signalfd to listen for SIGCHLD signals. When we receive a SIGCHLD over the signalfd, reap all dead children by looping over all registered child PIDs and call waitpid(WNOHANG) on them. 2020-05-21 20:15:10 +02:00			`#include <sys/wait.h>`

			`#include "fdm.h"`

			`struct reaper;`

			`struct reaper reaper_init(struct fdm fdm);`
			`void reaper_destroy(struct reaper *reaper);`

reaper: add optional callback When calling ‘reaper_add()’, the caller can provide a callback. If non-NULL, the reaper will call the callback to handle the actual reaping. If the callback is NULL, or if it returns false, the reaper reaps the child process. 2020-12-26 01:26:54 +01:00			`typedef bool (reaper_cb)(struct reaper reaper, pid_t pid, void *data);`

			`void reaper_add(struct reaper reaper, pid_t pid, reaper_cb cb, void cb_data);`
reaper: add reaper_del() - pid is no longer watched/monitored after this 2021-01-12 09:20:02 +01:00			`void reaper_del(struct reaper *reaper, pid_t pid);`