If you don't have and cannot install zipinfo for any reason, you can imitate it by using unzip with -Z option. To list the contents of the zip use unzip -Z1:
pw="$(unzip -Z1 file1.zip | cut -f1 -d'.')" unzip -P "$pw" file1.zip Put it to a loop:
zipfile="file1.zip" while unzip -Z1 "$zipfile" | head -n1 | grep "\.zip$"; do next_zipfile="$(unzip -Z1 "$zipfile" | head -n1)" unzip -P "${next_zipfile%.*}" "$zipfile" zipfile="$next_zipfile" done or a recursive function:
unzip_all() { zipfile="$1" next_zipfile="$(unzip -Z1 "$zipfile" | head -n1)" if echo "$next_zipfile" | grep "\.zip$"; then unzip -P "${next_zipfile%%.*}" "$zipfile" unzip_all "$next_zipfile" fi } unzip_all "file1.zip" -Z zipinfo(1) mode. If the first option on the command line is -Z, the remaining options are taken to be zipinfo(1) options. See the appropriate manual page for a description of these options.
-1 : list filenames only, one per line. This option excludes all others; headers, trailers and zipfile comments are never printed. It is intended for use in Unix shell scripts.
