On 10/04/17 15:24, Kenneth Johansson wrote:
On 2017-04-10 14:43, John Crispin wrote:
On 10/04/17 14:25, Kenneth Johansson wrote:
I found that we touch the file /tmp/sysupgrade in a few places
---
git grep "tmp/sysupgrade" | grep touch
package/base-files/files/sbin/sysupgrade:touch /tmp/sysupgrade
package/system/fstools/files/snapshot: touch /tmp/sysupgrade
package/system/procd/files/nand.sh: touch /tmp/sysupgrade
---
But why ? did not find anything that uses that file.
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Hi
procd [1] uses it to detect if an upgrade is in progress
John
[1]
https://git.lede-project.org/?p=project/procd.git;a=blob;f=initd/preinit.c;h=729978ea2f2af790653baaee5ae788f05a88a177;hb=HEAD#l62
Aha. there is was. But now I got even mode questions. how do procd
enter preinit state again and is it just killed later since it enters
an infinite wait.
Hi,
procd has an open FD to the rootfs mount. if we want to flash rootfs all
FDs must be closed prior. to achieve this procd will under certain
circumstances do an exec to self. to prevent it from booting the system
a second time and allowing sysupgrade to complete we use this stamp file.
John
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