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sq.manual
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1995-03-18
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SQ(1) UNIX Programmer's Manual SQ(1)
NAME
sq, usq - squeeze (compress) files
SYNOPSYS
sq [ _f_i_l_e_1 ] [ _f_i_l_e_2 ] ...
usq [ -_c_o_u_n_t ] [ -_f_c_o_u_n_t ] [ _f_i_l_e_1 ] [ _f_i_l_e_2 ] ...
DESCRIPTION
_s_q compresses one or more files, using a Huffman coding
scheme. _u_s_q decompresses or displays one or more files
squeezed by _s_q. The algorithm is identical to the one used
by the popular public domain 'SQ' programs, originally
authored by Richard Greenlaw.
sq will squeeze each file passed on the argument line. It
will append `.SQ' to the original file name to create the
output file name. If no file names are given, sq will
prompt for file names from the standard input. A message is
printed for each file, tracing each pass of the compression
process.
_u_s_q will unsqueeze or display the files requested on the
command line. If no files are requested, the file names
are input from the standard input. If no option is given,
the file is unsqueezed to its original name.
If the -count option is used, count lines are displayed from
the start of the file, with all unprintable characters
except CR, LF, TAB, and FF converted to periods. The output
is sent to the standard output. If the -fcount option is
used, the file is displayed with a formfeed appended to the
preview of each file.
AUTHOR
Richard Greenlaw (original), Theo Pozzy (ported versions)
BUGS
The file naming convention is not a one-to-one mapping, so
multiple files may be squeezed to the same output file name.
Also, the output file name for usq cannot be overridden.
SEE ALSO
compact(1)
Printed 2/8/86 Local 1