Thanks
I don't run any installers though. In my case a simple grub loader in the /EFI folder loads vmlinuz/initrd passing a from-label cheatcode. But even without that cheatcode the /porteus folder is somehow found anyway! The question is how. I'm going to have to look into initrd myself to find out. I'm preparing for multiple /porteus folders scenario and need to know the search logic. I don't want to use any UUID, LABEL etc., nor any other "from" cheatcode.
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set bootmgr=/EFI/boot/bootx64.efi #grubx64.efi # bootx64.efi
set bootdrv=$root
search -f $bootmgr --set=root
echo bootmgr: $bootmgr
sleep -v -i 3
if [ $root != $bootdrv ]; then
chainloader $bootmgr
else
echo "----------------------------------------"
echo USB drive NOT found.
echo
sleep -v -i 10
fi
set root=$bootdrv
-or-
set porteus_parms="volume=33 reboot=cold extramod=/Modules"
set bootdrv=$root
search -f /boot/syslinux/vmlinuz --set=root
if [ $root != $bootdrv ]; then
linux /boot/syslinux/vmlinuz $porteus_parms
initrd /boot/syslinux/initrd.xz
else
echo "----------------------------------------"
echo USB drive NOT found.
echo
sleep -v -i 10
fi
set root=$bootdrv
}
I'm afraid there's no generic/agnostic way to do that.
Anyway, it is the linuxrc that finds the /porteus folder (aka the location of the porteus-...cfg file and the location of the /porteus/changes) even without any "from" cheatcode. The question is how it chooses the right /porteus folder when there are more than one of those!?
Maybe initrd favours USB drives over static disks? Or does it favor "b" over "a"?It lists the available units using ls /mnt | tac and search in this order. In this case tac will revert the lines that normal ls outputs, and because portable units are usually in the end, by using tac we are most likely booting over portable units, which makes sense given the portable characteristics of the system.
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set PorteusLabel=PorteuSX
set PorteuXLabel=PorteuSXCode: Select all
set PorteusLabel=PorteusUSB
set PorteuXLabel=PorteuXUSBCode: Select all
#get local PorteusLabel, PorteuXLabel
source /local.cfg
menuentry 'Porteus 1920x1080' {
linux /boot/vmlinuz from=LABEL:$PorteusLabel changes=EXIT:/porteus login=root load=1920x1080 fsck
initrd /boot/initrd.zst
}I see the right grub menu then, using the above grub.cfg, I'm quite sure.from=LABEL:Porteus
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root@porteus:~# echo $from
LABEL:Porteus
root@porteus:~# blkid -s LABEL -o value /dev/sdb3
PorteusUSB
root@porteus:~# blkid -s LABEL -o value /dev/sda5
PorteusCode: Select all
# Find *.cfg file:
echo $i"searching for $CFG file"
if [ $IP ]; then BOOTDEV=network; CFGDEV=/mnt/nfs
for x in `lspci | grep 0200: | cut -d: -f3-4 | sed s/:/.*/g | tr a-z A-Z`; do modprobe `grep $x /lib/modules/$(uname -r)/modules.alias | tail -n1 | rev | cut -d" " -f1 | rev` 2>/dev/null; done
ls /sys/class/net | grep -q eth || { for x in `find /lib/modules/$(uname -r)/kernel/drivers/net -name "*.ko" | sed 's/.ko//g'`; do modprobe `basename $x` 2>/dev/null; ls /sys/class/net | grep -q eth && break || modprobe -r `basename $x` 2>/dev/null; done; }
mkdir -p /mnt/nfs/porteus /mnt/nfs/storage; udhcpc; modprobe nfsv4; mount -t nfs4 $IP:/srv/pxe/porteus /mnt/nfs/porteus -o ro,nolock 2>/dev/null || { modprobe nfsv3; mount -t nfs $IP:/srv/pxe/porteus /mnt/nfs/porteus -o ro,nolock 2>/dev/null; }
MAC=`ifconfig | grep eth0 | cut -d: -f5-7 | sed s/://g | cut -d" " -f1`
if [ "$CHANGES" = /srv/pxe/storage ]; then
if lsmod | grep -q nfsv3; then
mount -t nfs $IP:/srv/pxe/storage /mnt/nfs/storage -o rw,nolock 2>/dev/null && { mkdir -p /mnt/nfs/storage/client-$MAC/changes/home; CHANGES="/storage/client-$MAC"; }
else
mount -t nfs4 $IP:/srv/pxe/storage /mnt/nfs/storage -o rw,nolock 2>/dev/null && { mkdir -p /mnt/nfs/storage/client-$MAC/changes/home; CHANGES="/storage/client-$MAC"; }
fi
fi
elif [ $ISO ]; then CFGDEV=/mnt/isoloop
locate -e $FROM && { BOOTDEV=/mnt/$DEV; mkdir /mnt/isoloop; mount -o loop /mnt/$DEV/$LPTH /mnt/isoloop; ISOSRC=/mnt/$DEV/$LPTH; }
else
if [ $FROM ]; then
locate -e $FROM/porteus/$CFG
if [ $? -eq 0 ]; then
DIR=`echo $LPTH | rev | cut -d/ -f3- | rev`; [ $DIR ] && FOLDER=$DIR/porteus
else
echo -e "${YELLOW}from= cheatcode is incorrect, press enter to search through all devices${RST}"
read -s; search -e porteus/$CFG
fi
else
search -e porteus/$CFG || lazy -e porteus/$CFG
fi
CFGDEV=/mnt/$DEV
fiIf not mistaken what you want.Suppose I have multiple /porteus (and /porteux) folders on different partitions and disks
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APPEND changes=EXIT:UUID:C23A-6012/changes/50save.dat extramod=UUID:C23A-6012/Modules OK, thanks, I should try it then. But in theory, from:LABEL should work too!
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# Find location of Porteus files
locate() { LPATH=`echo $2 | cut -b-5 | sed s@/dev@/mnt@`
if [ $LPATH = /mnt/ ]; then
DEV=`echo $2 | cut -d/ -f3`; LPTH=`echo $2 | cut -d/ -f4-`; SLEEP=6
while [ $SLEEP -gt 0 -a ! -b /dev/$DEV ]; do nap; let SLEEP=SLEEP-1; fstab; done
[ -d /mnt/$DEV ] || mount_device $DEV
[ $1 /mnt/$DEV/$LPTH ]
elif [ $LPATH = UUID: -o $LPATH = LABEL ]; then
ID=`echo $2 | cut -d: -f2 | cut -d/ -f1`; LPTH=`echo $2 | cut -d/ -f2-`; DEV=`blkid | grep $ID | cut -d: -f1 | cut -d/ -f3`; SLEEP=6
while [ $SLEEP -gt 0 -a "$DEV" = "" ]; do nap; let SLEEP=SLEEP-1; fstab; DEV=`blkid | grep $ID | cut -d: -f1 | cut -d/ -f3`; done
[ -d /mnt/$DEV ] || mount_device $DEV
[ $1 /mnt/$DEV/$LPTH ]
else
LPTH=$2; search $* || lazy $*
fi }Code: Select all
linux /boot/vmlinuz from=LABEL:Porteus
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$ echo -e "Porteus\nPorteusUSB" > test
$ cat test
Porteus
PorteusUSB
$ grep Porteus test
Porteus
PorteusUSB
$ grep PorteusUSB test
PorteusUSB
## -w, --word-regexp match only whole words
$ grep -w Porteus test
Porteus
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ID=`echo $2 | cut -d: -f2 | cut -d/ -f1`; LPTH=`echo $2 | cut -d/ -f2-`; DEV=`blkid | grep -w $ID | cut -d: -f1 | cut -d/ -f3`; SLEEP=6
while [ $SLEEP -gt 0 -a "$DEV" = "" ]; do nap; let SLEEP=SLEEP-1; fstab; DEV=`blkid | grep -w $ID | cut -d: -f1 | cut -d/ -f3`; doneOh that's so funny
Yes, the crazy thought of trying different labels did cross my mind. I thought it was too childish though. Thanks for spotting it! Well done! I've relabeled the internal Porteus partition to PortInt, so that I now have "PortInt" and "PorteusUSB" -- 2 words that aren't substrings of the other. But, it is a bug, would you agree Would you fix it maybe in the next version of initrd, please?
