Re: gen_initramfs_list.sh escaping problem or stale dependency file?

From: Michal Marek
Date: Tue Sep 13 2016 - 03:24:27 EST


On Mon, Sep 12, 2016 at 05:12:15PM -0700, Florian Fainelli wrote:
> Hi,
>
> I have a root filesystem embedding filenames that look like these:
>
> /lib/data/<vid>:<pid>
>
> these are essentially files that can be matched against an USB
> vendor/product id in an easy way.
>
> Now, the fun part is that this is only a problem when doing the
> following (using OpenWrt/LEDE as a build system):
>
> 1:
> - set CONFIG_INITRAMFS_SOURCE=""
> - build kernel modules
> - build my user-space tools
> - build the kernel image
> - reconfigure the kernel to now use an initramfs
> - build the kernel w/ initramfs
>
> and then back to step 1 with the kernel build, would I hit this error:
>
> usr/Makefile:64: *** multiple target patterns. Stop.
[...]
> Which sorts of make sense here because the file name contains a ":"
> which is not escaped, so GNU Make tries to interpret it.
>
> Now the part that does not quite make sense to me is why this file is
> even relevant here considering that the first thing we do is set
> CONFIG_INITRAMFS_SOURCE="" to disable the initramfs basically.

It is possible that we read usr/Makefile twice for some reason. But the
real problem is the lack of escaping. Can you try the following
(untested) patch?


diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 17fa901418ae..5d3188e74101 100755
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -97,7 +97,10 @@ print_mtime() {
}

list_parse() {
- [ ! -L "$1" ] && echo "$1 \\" || :
+ if [ -L "$1" ]; then
+ return
+ fi
+ echo "$1" | sed 's/\([:%]\)/\\\1/g; s/$/ \\/'
}

# for each file print a line in following format

Thanks,
Michal