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|
#!/bin/sh
SUMFILE="SHA256SUM"
SUMPROG="sha256sum"
die()
{
echo "$*" >&2
exit 1
}
# Checksum directory ($1) contents
checksum_dir()
{
local path="$1"
[ -d "$path" ] || die "'$path' is not a directory"
echo "entering directory '$path'"
local olddir="$(pwd)"
cd "$path" || die "cd '$path' failed"
for file in *; do
[ "$file" = "$SUMFILE" ] && {
# Do not checksum the checksum file
continue
}
[ -d "$file" ] && {
# Recurse into subdirectory
checksum_dir "$file"
continue
}
[ -f "$file" ] || {
# This is not a regular file. Don't checksum it.
continue
}
[ -f "$SUMFILE" ] && {
cat "$SUMFILE" | while read line; do
if [ "x$file" = "x$(echo "$line" | cut -d' ' -f2- | cut -c2-)" ]; then
# This file is already checksummed. Skip it.
return 1
fi
done || continue
}
"$SUMPROG" -b "$file" >> "$SUMFILE" ||\
die "checksumming of '$file' failed"
done
echo "leaving directory '$path'"
cd "$olddir" || die "cd '$olddir' failed"
}
for path in "$@"; do
checksum_dir "$path"
done
|
