Research V7 development

Work on file usr/man/man1/lookall.1

Co-Authored-By: Dennis Ritchie <dmr@research.uucp>
Synthesized-from: v7

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+.TH LOOKALL 1
+.SH NAME
+lookall \- look through all text files on UNIX
+.SH SYNOPSIS
+.B lookall
+[
+.BI \-C n
+]
+.SH DESCRIPTION
+.I Lookall
+accepts keywords from the standard input, performs
+a search similar to that of
+.IR  refer (1),
+and writes the result on the standard output.
+.I Lookall
+consults, however, an index to all the text files on
+the system rather than just bibliographies.
+Only the first 50
+words of each file (roughly) were used to
+make the indexes.
+Blank lines are taken as delimiters between queries.
+.PP
+The
+.BI -C n
+option
+specifies a coordination level search: up to
+.IR n
+keywords may be missing
+from the answers, and the answers are listed
+with those containing the most keywords first.
+.PP
+The command sequence in
+.I /usr/dict/lookall/makindex
+regenerates the index.
+.SH FILES
+The directory
+.I /usr/dict/lookall
+contains the index files.
+.SH DIAGNOSTICS
+`Warning: index precedes file ...'
+means that a file has been changed since the index was made
+and it may be retrieved (or not retrieved) erroneously.
+.SH BUGS
+Coordination level searching doesn't work as described: only
+those acceptable items with the smallest number of
+missing keywords are retreived.