MBK_IN_FILTER - define the input filter
See the file man1/alc_origin.1.
set the input filter for reading compressed Alliance files.
Filter is typically a string containing filename and options. This filter must
read compressed data flow on it standard input and write non compressed data
flow on it standard output. Files are taken in the first directory where they
are found according to the environment variable MBK_CATA_LIB. If a file
compressed version and a file non compressed version exist booth in the same
directory, the non compressed is opended, and a warning message is supllyed.
To activate filters, variable MBK_FILTER_SFX must be set.
Opening compressed files with gzip :
setenv MBK_IN_FILTER "/asim/gnu/bin/gunzip -c"
setenv MBK_FILTER_SFX ".gz"
See the file man1/alc_bug_report.1.