various changes over time

1 files changed, 42 insertions, 0 deletions

diff --git a/misc/mountimg b/misc/mountimg
new file mode 100755
index 0000000..efe886c
--- /dev/null
+++ b/misc/mountimg
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+set -e
+
+die() { echo "$(basename "$0"): $1" && exit 1 ; }
+
+# file check
+! [ "$1" ]         && die "No file was specified"
+! [ -f "$1" ]      && die "$1 is not a file"
+# mountpoint check
+! [ "$2" ]         && die "No mountpoint was specified"
+! [ -d "$2" ]      && die "Mountpoint $2 is not a directory"
+[ "`ls -A "$2"`" ] && die "Mountpoint $2 is not empty"
+# check disk image validity
+! fdisk -lu "$1" 2>&1 | grep -m1 "\s*Start\s*End" >/dev/null && die "File $1 is not a disk image"
+
+# get sectorsize
+#sectorsize=$(fdisk -lu "$1" | grep -m1 '^Units:' | cut -d' ' -f8)  # Sector size is 8th word
+sectorsize=512
+
+# get partition num, if there is more than one part, interactively if not available
+# TODO check if there is no partitions
+partition="$3"
+if [ -z "$partition" ]; then
+	fdisk -o Size,Type,Name -lu "$1" | awk '!f{print $0};f>0{print "  " f-1 ") " $0; f++};f==-1{print "Part " $0;f=1};/^$/{f=-1}'
+
+	printf "\nChoose partition number to mount: "
+	read partition
+fi
+
+# check if part num valid
+[ -z "${partition##*[!0-9]*}" ] && die "Illegal number: '$partition'"
+
+# get offset from fdisk
+fdisk_ignore_lines=9  # ignore first 9 lines of output
+offset=$(fdisk -o Start -l "$1" | sed $(( fdisk_ignore_lines + partition ))'q;d' )
+
+# check if that produced a valid offset
+[ -z "$offset" ] && die "Partition $partition does not exist"
+
+# try to mount
+mount -o loop,offset=$(( offset * sectorsize )) "$1" "$2" && echo "Successfully mounted" || die "Error mounting"