+.TH "FINDDUP" 1 "Mar 2010" "Francois Fleuret" "User Commands"
+
\" This man page was written by Francois Fleuret <francois@fleuret.org>
\" and is distributed under a Creative Commons Attribution-Share Alike
\" 3.0 License.
-.TH "FINDDUP" 1 "Mar 2010" "Francois Fleuret" "User Commands"
-
.SH "NAME"
-finddup \- Find files common to several directories or not
+finddup \- Find files common to two directories (or not)
.SH "SYNOPSIS"
-\fBfinddup\fP [OPTION]... [FILE]...
+\fBfinddup\fP [OPTION]... DIR1 [[not:]DIR2]
.SH "DESCRIPTION"
-\fBfinddup\fP is a command line utility to find duplicate files, files
-common to two directories or files existing in one directories and not
-in another one.
+With a single directory argument, \fBfinddup\fP prints the duplicated
+files found in it. With two directories, it prints either the files
+common to both DIR1 and DIR2, or with the `not:' prefix, the ones
+present in DIR1 and not in DIR2.
.SH "OPTIONS"
.TP
\fB-h\fR
display help and exit
.TP
+\fB-d\fR
+ignore files and directories starting with a dot
+.TP
+\fB-c\fR
+do not show which files from DIR2 corresponds to files from DIR1
+.TP
+\fB-g\fR
+show the file group IDs (one group for each content)
+.TP
\fB-r\fR
shows the real path of the files
.SH "BUGS"
-None known, probably many though.
+Every pair of different files with same content are listed, which
+results in K^2 printed lines when K files are similar.
.SH "AUTHOR"