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IRIX Base Documentation 1998 November
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IRIX 6.5.2 Base Documentation November 1998.img
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comb.z
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comb
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1998-10-20
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133 lines
CCCCOOOOMMMMBBBB((((1111)))) CCCCOOOOMMMMBBBB((((1111))))
NNNNAAAAMMMMEEEE
comb - combine SCCS deltas
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
ccccoooommmmbbbb [ ----oooo ][ ----ssss ][ ----pppp sid][ ----cccc list] files
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
_c_o_m_b generates a shell procedure [see _s_h(1)] which, when run, will
reconstruct the given SCCS files. The reconstructed files will,
hopefully, be smaller than the original files. The arguments may be
specified in any order, but all keyletter arguments apply to all named
SCCS files. If a directory is named, _c_o_m_b behaves as though each file in
the directory were specified as a named file, except that non-SCCS files
(last component of the path name does not begin with ssss....) and unreadable
files are silently ignored. If a name of ---- is given, the standard input
is read; each line of the input is taken to be the name of an SCCS file
to be processed; non-SCCS files and unreadable files are silently
ignored. The generated shell procedure is written on the standard
output.
The keyletter arguments are as follows. Each is explained as though only
one named file is to be processed, but the effects of any keyletter
argument apply independently to each named file.
----oooo For each ggggeeeetttt ----eeee generated, this argument causes the reconstructed
file to be accessed at the release of the delta to be created,
otherwise the reconstructed file would be accessed at the most
recent ancestor. Use of the ----oooo keyletter may decrease the size of
the reconstructed SCCS file. It may also alter the shape of the
delta tree of the original file.
----ssss This argument causes _c_o_m_b to generate a shell procedure which, when
run, will produce a report giving, for each file: the file name,
size (in blocks) after combining, original size (also in blocks),
and percentage change computed by:
100 **** (original - combined) / original
It is recommended that before any SCCS files are actually combined,
one should use this option to determine exactly how much space is
saved by the combining process.
----ppppSID
The _C_C_S ID_e_n_t_i_f_i_c_a_t_i_o_n string (SID) of the oldest delta to be
preserved. All older deltas are discarded in the reconstructed
file.
----cccc list A
_l_i_s_t (see _g_e_t(1) for the syntax of a _l_i_s_t) of deltas to be
preserved. All other deltas are discarded.
If no keyletter arguments are specified, _c_o_m_b will preserve only leaf
deltas and the minimal number of ancestors needed to preserve the tree.
PPPPaaaaggggeeee 1111
CCCCOOOOMMMMBBBB((((1111)))) CCCCOOOOMMMMBBBB((((1111))))
FFFFIIIILLLLEEEESSSS
s....COMB The name of the reconstructed SCCS file.
comb????? Temporary.
SSSSEEEEEEEE AAAALLLLSSSSOOOO
admin(1), delta(1), get(1), help(1), prs(1), sh(1), sccsfile(4)
DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
Use _h_e_l_p(1) for explanations.
BBBBUUUUGGGGSSSS
_c_o_m_b may rearrange the shape of the tree of deltas. It may not save any
space; in fact, it is possible for the reconstructed file to actually be
larger than the original.
PPPPaaaaggggeeee 2222