minsetup.c File Reference

(/usr/bin/git 2023-09-06, commit: d4525ff)

Implementation of minimal early system setup. More...

#include "minsetup.h"
#include <stdbool.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "logio.h"

Include dependency graph for minsetup.c:

Functions
int	crinitForkZombieReaper (void)
int	crinitSetupSystemFs (void)

Detailed Description

Implementation of minimal early system setup.

Function Documentation

crinitForkZombieReaper()

int crinitForkZombieReaper

(

void

)

Forks the calling process, parent will enter a wait-loop, child will return.

Meant to be used during early startup if the calling process is PID 1. After the call, PID 1 will be in a permanent wait-loop to take care of orphaned processes. The new process will return from the funtion and go on.

Returns

-1 if fork() fails, 0 on success in the child process, parent process will never return

crinitSetupSystemFs()

int crinitSetupSystemFs

(

void

)

Sets up devtmpfs, devpts, sysfs, procfs, and a tmpfs on /run

Meant to be used during early startup, so that necessary system interfaces are available.

Returns

0 on success, -1 on error