summer manpage as sent to me by Peter Maydell in December 2006

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+.TH SUMMER "1" "December 2006" "Debian" "Chiark-utils-bin"
+.SH NAME
+summer \- print checksum and system metainformation for files
+.SH SYNOPSIS
+.B summer -ACDbfhqt
+.RI [\| startpoint ...]
+.br
+.SH DESCRIPTION
+.B summer
+prints the MD5 checksum of the contents, and the system
+metainformation (ownership, permissions, timestamps, etc.), for a
+file, or recursively for a whole directory tree.
+
+Each command line argument should be a file or directory to be processed;
+if it is a directory then it will be processed and then its contents will
+also be processed, recursively. If no
+.IR startpoint s
+are specified on the command line then
+.B summer
+will read a list of newline-separated startpoints from standard input.
+
+Since
+.B summer
+correctly handles devices, FIFOs and other non-regular files it is useful
+for generating and comparing summaries of arbitrary directory trees where
+md5sum alone would not be.
+.SH OUTPUT FORMAT
+.B summer
+prints one line of information for each filesystem object it processes.
+Each line has the following columns:
+.TS
+tab (@);
+l l.
+@MD5sum or file type information
+@Size of file in bytes
+@File access rights (in octal)
+@User ID of owner
+@Group ID of owner
+@atime (time of last access)
+@mtime (time of last modification)
+@ctime (time of last status change)
+@Filename
+.TE
+
+For regular files, the first column is the MD5sum. For directories, pipes,
+symlinks and sockets it is the literal string `dir', `pipe', `symlink' or `socket'
+as appropriate. For devices it begins with `c' for character or `b' for block
+devices, followed by the device number as a single 32 bit hex number and as
+four separate 8 bit hex numbers.
+
+Note that certain characters in the filename (including spaces and `\\' characters)
+are escaped using
+.B \\\x\c
+.I NN
+syntax, where
+.I NN
+are two hex digits. This makes the output unambiguous. Filenames will be relative
+if the relevant
+.I startpoint
+was relative, and absolute if it was absolute.
+For symlinks the filename
+column includes an indication of the target of the link.
+.SH OPTIONS
+.TP
+.B \-A
+Do not print the atime (time of last access). The `atime' column will be omitted.
+.TP
+.B \-C
+Do not print the ctime (time of last status change). The `ctime' column will be omitted.
+.TP
+.B \-D
+Do not print directory sizes. The `size' column for directories will read `dir'.
+.TP
+.B \-b
+Do not print mtime (time of last modification) for symbolic links. The `mtime' field
+for symbolic links will read `link'.
+.TP
+.B \-f
+Include information about errors encountered (for example, unreadable files)
+in the output, and continue processing. The default is to print error information
+to standard error and stop immediately an error is encountered.
+.TP
+.B \-h
+Print a brief usage message (and do nothing else).
+.TP
+.B \-q
+Suppress the progress information which
+.B summer
+normally prints to standard error.
+.TP
+.B \-t
+Set the field separator between the information and the filename to a
+tab character (default is space).
+.SH BUGS
+.B summer
+requires switches to be specified in a single argument; that is,
+.B -ACf
+is accepted but
+.B -A -C -f
+is not.
+.SH AUTHOR
+This Manual page was written by Peter Maydell <pmaydell@chiark.greenend.org.uk> but
+may be used by anyone.
+.SH COPYRIGHT
+Copyright (C) 2003-2006 Ian Jackson <ian@chiark.greenend.org.uk>
+.br
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.