getltsconffile fails to parse BOOT_IMAGE correctly for some cases

[Norman Gaywood]

/usr/share/ltsp/init-ltsp.d/05-getltsconffile parses /proc/cmdline to decide a filename and path to the lts.conf file on the tftpd server.

There are some cases where this fails, for example a pxelinux.conf/ config that looks like:

 kernel http://123.456.78.9/ltsp/amd64/vmlinuz
 append ro initrd=http://123.456.78.9/ltsp/amd64/initrd.img-generic init=/sbin/init-ltsp root=/dev/nbd0

Here is a patch to /usr/share/ltsp/init-ltsp.d/05-getltsconffile that will allow it to parse such BOOT_IMAGE strings:

# diff 05-getltsconffile /opt/ltsp-old/amd64/usr/share/ltsp/init-ltsp.d/05-getltsconffile
5,6c5
< # The path may also be part of a URL so also need to remove leading 'proto://host'
< # If there is no path, we want just "lts.conf" without inserting a slash, as some tftp
---
> # If it doesn't, we want just "lts.conf" without inserting a slash, as some tftp
11c10
< boot_image=$(cat /proc/cmdline | sed -n 's/.*BOOT_IMAGE=\([^[:space:]]*\).*/\1/p' | sed 's#^[^:]*://[^/]*##')
---
> boot_image=$(sed -n 's/.*BOOT_IMAGE=\([^[:space:]]*\).*/\1/p' /proc/cmdline)

[Alkis Georgopoulos (alkisg)]

Hi Norman, please test the patch attached at the last comment of https://bugs.launchpad.net/ltsp/+bug/1594840
Closing this bug as duplicate of the other one.
Thanks!