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| 18:46.14 | mnemoc | hi, there is any "standard" script name to use as bb's initab ::shutdown: ? (instead of tons of code hardcoded in inittab) |
| 18:53.41 | landley | mnemoc: check out the busybox help page, I think there's a sample there? |
| 18:54.05 | landley | http://busybox.net/downloads/BusyBox.html#item_init |
| 18:58.15 | mnemoc | landley: they do direct calls to umount and swapoff |
| 18:59.00 | landley | mnemoc: so? |
| 18:59.12 | mnemoc | landley: but as rcS for ::sysinit: I wanted to use an script for ::shutdown: .. but with an "standard" name :\ I guess I'll use rc0 |
| 18:59.37 | landley | If you want to know what busybox is doing in the absence of a script, there it is. |
| 18:59.42 | landley | If you want to do something else, you're welcome to. |
| 18:59.54 | landley | If you want to do something else and have it called a "standard", we're having a semantic argument. :) |
| 19:00.20 | landley | Personally, I tend to make bsd style init scripts. |
| 19:00.28 | landley | A script to bring the system up, and a script to bring the system down. |
| 19:00.54 | mnemoc | landley: and what name would you use for the script to bring the system down? :) |
| 19:00.55 | landley | Breaking it into 8 gazillion little scripts called with "start" and "stop" arguments was done by the system 5 guys so they could have a GUI tool enable/disable them. |
| 19:01.02 | landley | Doesn't apply to embedded systems much. |
| 19:01.14 | landley | <PROTECTED> |
| 19:01.28 | mnemoc | great suggestion :) |
| 19:01.42 | mnemoc | thanks a lot ,-) I use that |
| 19:01.47 | landley | You're welcome. |
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| 19:41.18 | mnemoc | landley: in the case the "system" that use bb's init is actually an initramfs, there is any suggested place to switch_root? |
| 19:43.21 | landley | mnemoc: what do you mean? |
| 19:43.45 | landley | place to call switch_root from? Place to switch_root to? Place to keep the switch_root executable...? |
| 19:44.40 | mnemoc | place from where to call switch_root |
| 19:44.48 | mnemoc | rc.reboot ? |
| 19:45.22 | landley | mnemoc: ok, the kernel calls /init out of initramfs. |
| 19:45.36 | landley | That's generally going to be a shell script if you want to do a switch_root. |
| 19:45.58 | landley | Have your shell script do whatever setup it needs, and then "exec switch_root". (Don't forget to exec, you want switch_root to be pid 1, not a child of pid 1.) |
| 19:46.58 | mnemoc | yes, in a normal case that's what i do |
| 19:47.21 | mnemoc | but i was requested to make a "rescue" initrd... with ssh support and stuff |
| 19:47.27 | mnemoc | in the case root doesn't mount properly |
| 19:47.36 | landley | ok.. |
| 19:47.46 | landley | In that case, you probably don't want to call switch_root at all. |
| 19:47.58 | landley | When you call switch_root, the contents of initramfs get deleted. |
| 19:48.17 | landley | You can do a mount --bind and a chroot instead... |
| 19:48.59 | landley | Except that requires finding a directory in the final filesystem to do the bind mount on, and that's iffy... |
| 19:49.00 | mnemoc | .oO |
| 19:49.27 | landley | Probably just keep the hard drive's filesystem mounted as a subdirectory and work with it in there. |
| 19:50.25 | mnemoc | but the "real" /sbin/init wont be pid 1 in that case... wont that cause troubles? |
| 19:50.42 | landley | Ok, what do you want the system to _do_? |
| 19:51.04 | landley | If the final root filesystem doesn't mount, don't call switch_root. (You have nothing to switch_root into.) |
| 19:51.16 | landley | If it does mount, switch_root and delete the content of initramfs. |
| 19:51.21 | landley | Is that what you want to do? |
| 19:51.27 | mnemoc | aha! |
| 19:51.30 | mnemoc | got your point |
| 19:52.06 | mnemoc | thanks a lot for the enlightenment! |
| 19:52.49 | mnemoc | i was about to start the rescue system always and then "shut it off" if the mount and switch_root works fine :p |
| 19:53.27 | mnemoc | but you are right, the rescue system has to go up only if i can't switch_root :D |
| 19:53.33 | mnemoc | thank you very much :) |
| 19:53.45 | mnemoc | back to drawing |
| 19:54.48 | landley | You're welcome. |
| 19:55.15 | mnemoc | :) |
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