"Alistair Crooks" <[email protected]>, Tuesday, August 05, 2014 at 10:46 PM
> Just provide the file as stdin, e.g.
>
> % md5 < Makefile
> c484c4693b61f058087c0bb84091adfb
> %

Hello,

Thank you for your reply. Actually my idea was to omit pipes (as my tool 
doesn't support it in an unbitter way),

I've just pushed the things forward and did a research. NetBSD ships with '-n', 
an equivalent of '-r' from FreeBSD and OpenBSD. The quiet (-q) mode was added 
and the patch against current is attached to this mail.

I'll submit a public-report for this task along with the patch and link to this 
thread. I'm open for comments.

Thanks in advance,
Index: cksum.1
===================================================================
RCS file: /cvsroot/src/usr.bin/cksum/cksum.1,v
retrieving revision 1.45
diff -u -r1.45 cksum.1
--- cksum.1	28 Mar 2013 22:54:25 -0000	1.45
+++ cksum.1	20 Aug 2014 22:57:25 -0000
@@ -47,32 +47,32 @@
 .Sh SYNOPSIS
 .Nm cksum
 .Op Fl n
-.Op Fl a Ar algorithm Oo Fl ptx Oc Oo Fl s Ar string Oc
+.Op Fl a Ar algorithm Oo Fl pqtx Oc Oo Fl s Ar string Oc
 .Op Fl o Ar 1 Ns | Ns Ar 2
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm sum
 .Op Fl n
-.Op Fl a Ar algorithm Oo Fl ptx Oc Oo Fl s Ar string Oc
+.Op Fl a Ar algorithm Oo Fl pqtx Oc Oo Fl s Ar string Oc
 .Op Fl o Ar 1 Ns | Ns Ar 2
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm md2
-.Op Fl nptx
+.Op Fl npqtx
 .Op Fl s Ar string
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm md4
-.Op Fl nptx
+.Op Fl npqtx
 .Op Fl s Ar string
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm md5
-.Op Fl nptx
+.Op Fl npqtx
 .Op Fl s Ar string
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm rmd160
-.Op Fl nptx
+.Op Fl npqtx
 .Op Fl s Ar string
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Nm sha1
-.Op Fl nptx
+.Op Fl npqtx
 .Op Fl s Ar string
 .Op Ar Li \&| Fl c Oo Fl w Oc Oo Ar sumfile Oc
 .Sh DESCRIPTION
@@ -191,6 +191,10 @@
 .It Fl p
 Echo input from standard input to standard output, and append the
 selected message digest.
+.It Fl q
+Quiet mode \(em only the checksum is printed out. Overrides the
+.Fl n
+option.
 .It Fl s Ar string
 Print the hash of the given string
 .Ar string .
@@ -323,6 +327,10 @@
 .Pq Fl c
 first appeared in
 .Nx 4.0 .
+Quiet mode
+.Pq Fl q
+was added in
+.Nx 7.0 .
 .\" .Pp
 .\" The
 .\" .Nm sum
Index: cksum.c
===================================================================
RCS file: /cvsroot/src/usr.bin/cksum/cksum.c,v
retrieving revision 1.46
diff -u -r1.46 cksum.c
--- cksum.c	18 Oct 2013 20:47:06 -0000	1.46
+++ cksum.c	20 Aug 2014 22:57:25 -0000
@@ -104,6 +104,9 @@
 
 #include "extern.h"
 
+#define PRINT_NORMAL     0x01
+#define PRINT_QUIET      0x02
+
 typedef char *(*_filefunc)(const char *, char *);
 
 const struct hash {
@@ -157,14 +160,15 @@
 	int (*cfncn) (int, u_int32_t *, off_t *);
 	void (*pfncn) (char *, u_int32_t, off_t);
 	const struct hash *hash;
-	int normal, i, check_warn, do_check;
+	int i, check_warn, do_check;
+	int print_flags;
 
 	cfncn = NULL;
 	pfncn = NULL;
 	pflag = nohashstdin = 0;
-	normal = 0;
 	check_warn = 0;
 	do_check = 0;
+	print_flags = 0;
 
 	setlocale(LC_ALL, "");
 
@@ -186,7 +190,7 @@
 		}
 	}
 
-	while ((ch = getopt(argc, argv, "a:cno:ps:twx")) != -1)
+	while ((ch = getopt(argc, argv, "a:cno:pqs:twx")) != -1)
 		switch(ch) {
 		case 'a':
 			if (hash) {
@@ -221,7 +225,7 @@
 			do_check = 1;
 			break;
 		case 'n':
-			normal = 1;
+			print_flags |= PRINT_NORMAL;
 			break;
 		case 'o':
 			if (hash) {
@@ -245,6 +249,9 @@
 				requirehash("-p");
 			pflag = 1;
 			break;
+		case 'q':
+			print_flags |= PRINT_QUIET;
+			break;
 		case 's':
 			if (hash == NULL)
 				requirehash("-s");
@@ -310,7 +317,7 @@
 				 * Assume 'normal' output if there's a '('
 				 */
 				p_filename += 1;
-				normal = 0;
+				print_flags &= ~(PRINT_NORMAL);
 
 				p_cksum = strrchr(p_filename, ')');
 				if (p_cksum == NULL) {
@@ -364,7 +371,7 @@
 					/*
 					 * 'normal' output, no (ck)sum
 					 */
-					normal = 1;
+					print_flags |= PRINT_NORMAL;
 					nspaces = 1;
 					
 					p_cksum = buf;
@@ -468,7 +475,7 @@
 			if (*argv) {
 				fn = *argv++;
 				if (hash != NULL) {
-					if (hash_digest_file(fn, hash, normal)) {
+					if (hash_digest_file(fn, hash, print_flags)) {
 						warn("%s", fn);
 						rval = 1;
 					}
@@ -497,7 +504,7 @@
 }
 
 static int
-hash_digest_file(char *fn, const struct hash *hash, int normal)
+hash_digest_file(char *fn, const struct hash *hash, int flags)
 {
 	char *cp;
 
@@ -505,7 +512,9 @@
 	if (cp == NULL)
 		return 1;
 
-	if (normal)
+	if (flags & PRINT_QUIET)
+		printf("%s\n", cp);
+	else if (flags & PRINT_NORMAL)
 		printf("%s %s\n", cp, fn);
 	else
 		printf("%s (%s) = %s\n", hash->hashname, fn, cp);

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