add and install b2sum man page, improve makefile portability

2 files changed, 109 insertions, 5 deletions

diff --git a/b2sum/b2sum.1 b/b2sum/b2sum.1
new file mode 100644
index 0000000..43382b0
--- /dev/null
+++ b/b2sum/b2sum.1
@@ -0,0 +1,94 @@
+.Dd February 20, 2016
+.Dt B2SUM 1
+.Os
+.Sh NAME
+.Nm b2sum
+.Nd generate checksums using the BLAKE2 hash function
+.Sh SYNOPSIS
+.Nm
+.Op Fl a Ar algorithm
+.Op Fl l Ar length
+.Op Fl -tag
+.Op Ar file ...
+.Nm
+.Op Fl -help
+.Sh DESCRIPTION
+The
+.Nm
+command generates checksums for files using the BLAKE2 cryptographic
+hash function and writes them to standard output.
+.Pp
+When
+.Op Ar file ...
+is empty or -,
+.Nm
+reads from standard input.
+.Bl -tag -width Ar
+.It Fl a Ar algorithm
+Specify a variant of BLAKE2 to use when generating checksums. The
+variants are listed under the algorithms section, and the default
+is blake2b.
+.It Fl l Ar length
+Specify the digest length in bits. It must not exceed the maximum
+for the variant of BLAKE2 being used, and must be a multiple of 8.
+.It Fl -tag
+Prepend the checksums with
+.Qq "ALGORITHM-NAME (file) =" ,
+a format common on BSD systems.
+.It Fl -help
+Display usage.
+.El
+.Sh ALGORITHMS
+.Bl -tag -width blake2xx
+.It blake2b
+optimized for 64-bit platforms and NEON-enabled ARMs, produces digests
+of any size between 1 and 64 bytes
+.It blake2s
+optimized for 8 to 32-bit platforms, produces digests of any size
+between 1 and 32 bytes
+.It blake2bp
+4-way parallel BLAKE2b
+.It blake2sp
+8-way parallel BLAKE2s
+.El
+.Sh SEE ALSO
+.Xr shasum 1
+.Sh STANDARDS
+.Bl -tag -width "RFC XXXX"
+.It RFC 7693
+.\".Lk https://tools.ietf.org/rfc/rfc7693.txt RFC 7693
+The BLAKE2 Cryptographic Hash and Message Authentication Code
+.El
+.Sh AUTHORS
+.Nm
+is part of the
+.Em BLAKE2
+official implementation. BLAKE2 was designed by
+.An -nosplit
+.An "Jean-Philippe Aumasson" ,
+.An "Samuel Neves" ,
+.An "Zooko Wilcox-O'Hearn" , and
+.An "Christian Winnerlein" .
+.Pp
+BLAKE2 is based on the SHA-3 proposal
+.Em BLAKE
+which was designed by
+.An "Jean-Philippe Aumasson" ,
+.An "Luca Henzen" ,
+.An "Willi Meier" , and
+.An "Raphael C.-W. Phan" .
+.Pp
+BLAKE2, like BLAKE, relies on the
+.Em ChaCha20
+stream cipher, designed by
+.An Daniel J. Bernstein .
+.Pp
+A mailing list for BLAKE2 can be subscribed to by sending an empty
+message to
+.Mt info-subscribe@blake2.net .
+.Pp
+The four designers of BLAKE2 can be contacted at
+.Mt contact@blake2.net .
+.Pp
+This manual page was written by
+.Lk https://github.com/Scarletts Scarlett .
diff --git a/b2sum/makefile b/b2sum/makefile
index 5b79ee2..4c75924 100644
--- a/b2sum/makefile
+++ b/b2sum/makefile
@@ -1,10 +1,20 @@
-CC=gcc
-CFLAGS=-std=c99 -O3 -march=native -I../sse -static -fopenmp 
+PROG=b2sum
+PREFIX?=/usr/local
+MANDIR?=$(PREFIX)/man
+CC?=gcc
+CFLAGS?=-O3 -march=native -static
+CFLAGS+=-std=c99 -I../sse -fopenmp
 LIBS=
 #FILES=b2sum.c ../ref/blake2b-ref.c ../ref/blake2s-ref.c ../ref/blake2bp-ref.c ../ref/blake2sp-ref.c 
 FILES=b2sum.c ../sse/blake2b.c ../sse/blake2s.c ../sse/blake2bp.c ../sse/blake2sp.c 
 all: $(FILES)
-	$(CC) $(FILES) $(CFLAGS) $(LIBS) -o b2sum 
+	$(CC) $(FILES) $(CFLAGS) $(LIBS) -o $(PROG)
 
-clean:	
-	rm -f b2sum
+clean:
+	rm -f $(PROG)
+
+install:
+	install -d $(DESTDIR)$(PREFIX)/bin
+	install -d $(DESTDIR)$(MANDIR)/man1
+	install -m 755 $(PROG) $(DESTDIR)$(PREFIX)/bin
+	install -m 644 b2sum.1 $(DESTDIR)$(MANDIR)/man1/$(PROG).1