Tools to unpack and extract iso content and make iso

view iso directory listing

isoinfo -R -f -i <iso>
isoinfo -R -x <file> -i <iso>

extract iso:

#!/usr/local/bin/bash

function print_size {
    local size=`du -hs "$1" | cut -f1`
    printf "%s" "$size"
}

# Extract an ISO file to a directory
function extract_iso() {
    if ! [[ -f $1 ]] ; then
        echo "'$1' is not found"
        exit 1
    fi

    if ! [[ -d $2 ]] ; then
        echo "'$2' not found, create an empty output directory first"
        exit 1
    fi

    local isofile="$1"
    local isodir="$2"
    local size=`print_size "$isofile"`

    mkdir -p "$isodir"
    printf "Extracting ISO '%s' (%s) to: %s\n" "$isofile" "$size" "$isodir"
    files=(`isoinfo -f -R -i "$isofile"`)
    for f in "${files[@]}"; do
        d=`dirname "$isodir/$f"`
        if [ -f "$d" -a ! -s "$d" ]; then
            rm "$d" || error "Cannot remove '$d'"
            mkdir "$d" || error "Cannot create directory '$d'"
        fi
        isoinfo -R -x "$f" -i "$isofile" > "$isodir/$f" || error "Cannot extract '$f'"
    done
    printf "  Unpacked to %s\n" "`print_size "$isodir"`"
}

extract_iso $1 $2

./extract.sh $PWD/iso $PWD/extract_location
Extracting ISO 'iso' (1.6G) to: extract_location/
  Unpacked to 1.6G

squashfs contents:

unsquashfs packages.squashfs

mksquashfs package image/boot/package.squashfs -noappend -no-xattrs

view rpm content:

rpm -ql <rpm> --provides

extract rpm content:

rpm2cpio <rpm> | cpio -idv 2> /dev/null

make iso:

#!/usr/local/bin/bash

function print_size {
    local size=`du -hs "$1" | cut -f1`
    printf "%s" "$size"
}

# create an iso from directory
function make_iso() {
    if ! [[ -d $1 ]] ; then
        echo "'$2' not found. Create the contents first in '$2'"
        exit 1
    fi

    local isodir="$1"
    local isofile="$2"

    printf "Building ISO '%s' from: %s\n" "$isofile" "$isodir"
    mkisofs -R -uid 0 -gid 0 -quiet -o "$isofile" "$isodir/" || error "Error creating new ISO '$isofile'"
    printf "  ISO size is %s\n" "`print_size "$isofile"`"
}

make_iso $1 $2