cemkeylan/shinit

Basic Init Daemon in POSIX sh

shinit

Basic init daemon in POSIX sh with only 5 lines of code. It supports acting upon signals.

On USR1 signal it will poweroff, and on INT signal it will reboot.

Installing

Before installing, edit the second command to use your boot/poweroff script. If you are using Carbs Linux or KISS, you don't need to change it.

You can then install with make.

make install

Note on halting the system

shinit does NOT deal with system halting. You will need an extra utility for that given purpose. ubase halt deals with this. You can also use compile this really simple C program that tells to kernel to shutdown or reboot.

#include <sys/reboot.h>

int
main(int argc, char *argv[])
{
    switch ((int) argv[argc < 2 ? 0 : 1][0]) {
    case 'p': reboot(RB_POWER_OFF); break;
    case 'r': reboot(RB_AUTOBOOT);  break;
    default: return 1;
    }
    return 0;
}

You can compile the following program to something named halt or whatever you like. If you call halt p it will power off, if you call halt r it will reboot. Just note that this needs to be at the end of your init script, because this command will shut your computer down straight away. You can do the following check at the end of your init script:

case "$1" in
    poweroff) halt p ;;
    reboot)   halt r ;;
esac

shinit's Issues

Why not wait'ing?

Why not replacing the sleep with wait? One cannot know how long will a user have its computer on (I, for instance, usually keep it on for more than a day). wait will wait (what a surprise 😅) until all spawned processes finish.