URL:
<http://savannah.gnu.org/bugs/?49937>
Summary: Cannot pass a single backslash in multiboot cmdline
Project: GNU GRUB
Submitted by: jermar
Submitted on: Mon 26 Dec 2016 06:38:21 PM GMT
Category: Booting
Severity: Major
Priority: 5 - Normal
Item Group: Software Error
Status: None
Privacy: Public
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release:
Release: other
Reproducibility: Every Time
Planned Release: None
_______________________________________________________
Details:
I am observing a strange behavior when passing boot arguments with a backslash
to the kernel (the multiboot cmd_line via the multiboot command in grub.cfg).
I would like to pass e.g. foo\bar to the kernel, but to no avail. I tried:
<ul>
<li>foo\bar gets passed as foobar
<li>foo\\bar gets passed as foo\\bar
<li>'foo\bar' gets passed as foo\\bar
<li>"foo\bar" gets passed as foo\\bar
</ul>
Note that the backslash gets doubled when I try to escape it.
I am using grub 2.02~beta2, revision
bc220962e366b1b46769ed6f9fa5be603ba58ab5.
This is my grub.cfg:
<pre>
set default=0
set timeout=10
insmod vbe
insmod vga
menuentry 'HelenOS 0.6.0' --class helenos --class os {
multiboot /boot/kernel.bin console=devices/\hw\pci0\00:01.0\com1\a
module /boot/ns /boot/ns
module /boot/loader /boot/loader
module /boot/init /boot/init
module /boot/locsrv /boot/locsrv
module /boot/rd /boot/rd
module /boot/vfs /boot/vfs
module /boot/logger /boot/logger
module /boot/ext4fs /boot/ext4fs
module /boot/initrd.img /boot/initrd.img
}
</pre>
HelenOS is a multiboot-compliant microkernel, but you need a modified version
of it that makes use of the multiboot info cmd_line argument to be able to
reproduce this issue.
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