Modyfied ways of saving changes

New features which should be implemented in Porteus; suggestions are welcome. All questions or problems with testing releases (alpha, beta, or rc) should go in their relevant thread here, rather than the Bug Reports section.

Modyfied ways of saving changes

Postby tome » 12 Feb 2017, 21:14

I have added some prefixes to /etc/changes-exit.conf (start of lines descriptions):

"/" - file/dir saved during reboot and shutdown when 'changes=EXIT:' cheatcode is used
"!/" - exclude particular subfolder(s) if parent directory is designed to be saved during shutdown ('changes=EXIT:')
For below, new added prefixes 'changes=EXIT:' is unneeded:
"@/" - "path" will be symlink to "LINKDEST"/"path" made during boot (if target exist and other conditions are fulfilled)
"+/" - if file/dir was changed will be copied to "COPYDEST" during shutdown
"++/" - like "+/" but will be created numbered backups of newer files next to copied ones
"+-/" - like "+/" but will be created backups moved to Trash
"&" - line will be executed (designed for special symlinks)

Below is next part of my /etc/changes-exit.conf:
Code: Select all
# Additional descriptions:
# "+/", "++" and "+-" are designed to keep some (not large) files in rootcopy or another place
# "@" - designed to keep large, important or frequently changed content of directories/files between reboots. If paths are files or non empty directories made by you outside modules, symlinks will not be created - it is better to use it without changes=/ cheatcode. Paths with space characters may be not supported.
# By default LINKSTREE is "/" (LINKSTREE=/) and it should be set or changed only for testing

# Uncomment proper destinations or change them, only one for COPYDEST and one for LINKDEST:
# Below COPYDEST is /data/rootcopies/rootcopy3 on boot device and LINKDEST is /data on boot device
#COPYDEST=grep -A1 "Booting" /var/log/porteus-livedbg|tail -n1|sed 's^//^/^g' | sed 's^$^/data/rootcopies/rootcopy3^'
#LINKDEST=grep -A1 "Booting" /var/log/porteus-livedbg|tail -n1|sed 's^//^/^g' | sed 's^$^/data^'

#COPYDEST=/mnt/sda1/data/rootcopies/rootcopy3

#LINKDEST=/mnt/data
#LINKDEST=/tmp/data

In order to save changes in this way you need linkstree.sh script run at start (/etc/rc.d/rc.local) and copyto.sh script run during shutdown (/etc/rc.d/rc.local_shutdown):

linkstree.sh:
Code: Select all
#!/bin/sh

LINKSTREE=`cat /etc/changes-exit.conf | grep '^\s*LINKSTREE\s*=' |  sed -n '$p' | sed 's:^\s*LINKSTREE\s*=\s*::' | sed 's:\s*$::' | sed 's:^\`::' | sed 's:\`$::'`
LINKDEST=`cat /etc/changes-exit.conf | grep '^\s*LINKDEST\s*=' |  sed -n '$p' | sed 's:^\s*LINKDEST\s*=\s*::' | sed 's:\s*$::' | sed 's:^\`::' | sed 's:\`$::'`

[[ `eval "$LINKDEST" 2>/dev/null` ]] && LINKDEST=`eval "$LINKDEST"`

[[ `eval "$LINKSTREE" 2>/dev/null` ]] && LINKSTREE=`eval "$LINKSTREE"`
! [[ "$LINKSTREE" = "" || "$LINKSTREE" = "/" ]] && mkdir -p "$LINKSTREE"

if [[ ! "$LINKDEST" || "$LINKSTREE" == "$LINKDEST" ]]; then echo "Paths not set for symlinks"; else
s=`cat /etc/changes-exit.conf | grep '^@/' | sed s:^@/:/: | tr ' ' '#'`
#d=`cat /etc/changes-exit.conf | grep '^@/' | sed s:^@/:$LINKDEST/: | grep -v ' '`
#mkdir -p $d
t=`cat /etc/changes-exit.conf | grep '^@/' | sed s:^@/:$LINKSTREE/: | sed s:/$:: | sed 's/\(.*\)\/.*/\1/' | sort -u | grep -v ' '`
hgt=`cat /etc/changes-exit.conf | grep '^@/home/guest' | sed s:^@/:$LINKSTREE/: | sed s:/$:: | sed 's/\(.*\)\/.*/\1/' | sort -u | grep -v ' '`
rt=`cat /etc/changes-exit.conf | grep '^@/' | sed s:^@/:$LINKSTREE/: | sed s:/$:: | sed 's/\(.*\)\/.*/\1/' | sort -u | grep -v ' \|/home/guest'`
td=`cat /etc/changes-exit.conf | grep '^@/' | sed s:^@/:$LINKSTREE/: | grep -v ' '`

mkdir -p "$LINKSTREE/home"
a=`stat -c %a "$LINKSTREE/home"`
chmod 777 "$LINKSTREE/home"
su -l guest -c "mkdir -p `echo $hgt`"
mkdir -p $rt
chmod 755 "$LINKSTREE/home"
chmod $a "$LINKSTREE/home"

if [[ "$LINKSTREE" != "" && "$LINKSTREE" != "/" ]]; then
rm -fr $td
for i in $s; do
i=`echo $i | tr '#' ' '`
ln -snfT  "$LINKDEST$i" "$LINKSTREE$i"
done;
else
for i in $s; do
i=`echo $i | tr '#' ' '`
if ! [[ "$( ls -A "/mnt/live/memory/changes$i")" || "$( ls -A "/mnt/live/memory/images/changes$i")" || -f "/mnt/live/memory/changes$i" || -f "/mnt/live/memory/images/changes$i" || ! -e "$LINKDEST$i" || -e "$LINKSTREE$i" && "`df -T "$LINKSTREE$i"/ | awk '{print $2}' | sed -n '2p'`" != "aufs" ]] 2>/dev/null; then
rm -rf  "$LINKSTREE$i"
ln -snfT  "$LINKDEST$i" "$LINKSTREE$i"
fi
done
fi
fi


apart=`cat /etc/changes-exit.conf | grep '^&' | sed s:^\&:: | tr ' ' '#'`

for i in $apart; do
i=`echo $i | tr '#' ' '`
$i
done

copyto.sh:
Code: Select all
#!/bin/sh

COPYDEST=`cat /etc/changes-exit.conf | grep '^\s*COPYDEST\s*=' |  sed -n '$p' | sed 's:^\s*COPYDEST\s*=\s*::' | sed 's:\s*$::' | sed 's:^\`::' | sed 's:\`$::'`

[[ `eval "$COPYDEST" 2>/dev/null` ]] && COPYDEST=`eval "$COPYDEST"`
mkdir -p "$COPYDEST" 2>/dev/null

if [[ -e "$COPYDEST" ]]; then

cd /mnt/live/memory/changes
r1=`cat /etc/changes-exit.conf | grep '^+/' | sed s:^+/:: | tr ' ' '#'`
r2=`cat /etc/changes-exit.conf | grep '^++/' | sed s:^++/:: | tr ' ' '#'`
r3=`cat /etc/changes-exit.conf | grep '^+-/' | sed s:^+-/:: | tr ' ' '#'`

#r2
for i in $r2; do
i=`echo $i | tr '#' ' '`
#cp -afu  --backup=off --parents "$i" "$COPYDEST" 2>/dev/null
cp -afu  --backup=t --parents "$i" "$COPYDEST" 2>/dev/null
#gvfs-trash -f "$COPYDEST/$i.~"*~
done

#r1
for i in $r1; do
i=`echo $i | tr '#' ' '`
cp -afu  --backup=off --parents "$i" "$COPYDEST" 2>/dev/null
#cp -afu  --backup=t --parents "$i" "$COPYDEST" 2>/dev/null
#gvfs-trash -f "$COPYDEST/$i.~"*~
done

#r3
for i in $r3; do
i=`echo $i | tr '#' ' '`
#cp -afu  --backup=off --parents "$i" "$COPYDEST" 2>/dev/null
cp -afu  --backup=simple --parents "$i" "$COPYDEST" 2>/dev/null
gvfs-trash -f "$COPYDEST/$i~" "$COPYDEST/$i"/*~ "$COPYDEST/$i"/*/*~ "$COPYDEST/$i"/*/*/*~
done

cd
fi

#remove all numbered backups from $COPYDEST
#for x in `find $COPYDEST -name "*~*~" 2>/dev/null | tr ' ' '#'`; do x=`echo $x | tr '#' ' ' `; test -e "$COPYDEST/$x" && gvfs-trash -f "$COPYDEST/$x"; done

I have made some tests and it works quite good.
Last edited by tome on 26 Feb 2017, 23:10, edited 1 time in total.
Reason: default path to changes-exit.conf
tome
Contributor
Contributor
 
Posts: 556
Joined: 26 Jun 2013, 15:03
Location: Poland
Distribution: x64 Xfce (LXDE Openbox)

Return to Development



Who is online

Users browsing this forum: No registered users and 1 guest