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improve usage messages (thanks henesy)

Fix inconsistencies between programs and their usage
messages,  correct instances where information seems
to be missing or lost. This  includes missing arguments,
making usage consistent with manuals, and so on.

--- a/rc/bin/approx

+++ b/rc/bin/approx

@@ -1,6 +1,6 @@

 #!/bin/rc

 if(! ~ $#* 3){

-	echo usage: approx ratio min max

+	echo usage: approx ratio min max >[1=2]

 	exit usage

 }

 echo $1 $2 $3 | awk '

--- a/rc/bin/doc2txt

+++ b/rc/bin/doc2txt

@@ -3,7 +3,7 @@

 rfork en

 if(! ~ $#* 0 1) {

-	echo 'Usage: doc2txt [file.doc]' >[1=2]

+	echo 'usage: doc2txt [file.doc]' >[1=2]

 	exit usage

 }

--- a/rc/bin/doctype

+++ b/rc/bin/doctype

@@ -1,6 +1,11 @@

 #!/bin/rc

 # doctype:  synthesize proper command line for troff

+if(~ $#* 0){

+	echo 'usage: doctype [ -n ] [ -T dev ] [ file ] ...' >[1=2]

+	exit usage

+}

+

 troff=troff

 eqn=eqn

 prefer=prefer

--- a/rc/bin/juke

+++ b/rc/bin/juke

@@ -26,7 +26,7 @@

 		sname=$2

 		shift

 	case -*

-		echo Usage: classical [-d level] [-t] [-h srvhost]

+		echo usage: juke [-d level] [-tw] [-s srv] [-h srvhost] >[1=2]

 		exit usage

 	}

 	shift

--- a/rc/bin/lookman

+++ b/rc/bin/lookman

@@ -16,7 +16,7 @@

 *=`{echo $*|tr A-Z a-z|tr -dc 'a-z0-9_. \012'}	# fold case, delete funny chars

 if(~ $#* 0){

-	echo Usage: lookman key ... >/fd/2

+	echo usage: lookman key ... >/fd/2

 	exit usage

 }

 look $1 $index | sed 's/.*	//' | sort -u >$t1

--- a/rc/bin/lp

+++ b/rc/bin/lp

@@ -93,7 +93,7 @@

 argv0=lp

 if(! ifs=() eval `{aux/getflags $*}) {

-	echo $USAGE

+	echo $USAGE >[1=2]

 	exit usage

 }

 if(~ $flagd '?'){

--- a/rc/bin/man

+++ b/rc/bin/man

@@ -59,8 +59,8 @@

 search=yes

 while(~ $d 0) {

 	if(~ $#* 0) {

-		echo 'Usage: man [-bntpPSw] [0-9] [0-9] ... name1 name2 ...' >[1=2]

-		exit

+		echo 'usage: man [-bntpPSw] [0-9] [0-9] ... name1 name2 ...' >[1=2]

+		exit usage

 	}

 	if(test -d $S/$1){

 		sec=($sec $1)

--- a/rc/bin/psfax

+++ b/rc/bin/psfax

@@ -10,8 +10,8 @@

 switch($#*){

 case 0 1

-	echo usage: $0 telephone-number recipient '[files]'

-	exit 0

+	echo usage: $0 telephone-number recipient '[files]' >[1=2]

+	exit usage

 case 2

 	stdin=yes

 }

--- a/rc/bin/psu

+++ b/rc/bin/psu

@@ -15,6 +15,6 @@

 case 1

 	ps $flags | sed -n '/^'$1' /p'

 case *

-	echo Usage: psu '[ps-flags] [ user ]' >[1=2]

+	echo usage: psu '[ps-flags] [ user ]' >[1=2]

 	exit usage

 }

--- a/rc/bin/sig

+++ b/rc/bin/sig

@@ -5,8 +5,8 @@

 *=`{echo $*|tr A-Z a-z|tr -dc 'a-z0-9_ \012'}	# fold case, delete funny chars

 if(~ $#* 0){

-	echo Usage: sig function ... >/fd/2

-	exit 1

+	echo usage: sig function ... >/fd/2

+	exit usage

 }

 for (i) {

--- a/rc/bin/ssam

+++ b/rc/bin/ssam

@@ -4,7 +4,8 @@

 flagfmt='n,e script,f sfile'

 args='[ file ... ]'

-fn usage { echo $0 '[ -n ] [ -e script ] [ -f sfile ] [ file ... ]' >[1=2] }

+argv0=$0

+fn usage { echo usage: $argv0 '[ -n ] [ -e script ] [ -f sfile ] [ file ... ]' >[1=2] }

 if(! ifs=() eval `{aux/getflags $*}){

 	usage

 	exit usage

--- a/rc/bin/tap

+++ b/rc/bin/tap

@@ -2,7 +2,7 @@

 rfork e

 if(~ $#* 0){

-	echo 'Usage: ' $0 '[ pid ... ]' >[1=2]

+	echo 'usage:' $0 '[ pid ... ]' >[1=2]

 	exit usage

 }

--- a/sys/man/1/mothra

+++ b/sys/man/1/mothra

@@ -4,7 +4,7 @@

 .SH SYNOPSIS

 .B mothra

 [

-.B -va

+.B -dvak

 ]

 [

 .B -m

@@ -71,6 +71,9 @@

 .B -v

 Verbose mode. Causes HTML errors to be printed

 on file-descriptor 2.

+.TP

+.B -d

+Enables debug mode.

 .PP

 The display contains the last message from

 .I mothra,

--- a/sys/src/cmd/aan.c

+++ b/sys/src/cmd/aan.c

@@ -65,7 +65,7 @@

 static void

 usage(void)

 {

-	fprint(2, "Usage: %s [-cd] [-m maxto] dialstring|netdir\n", argv0);

+	fprint(2, "usage: %s [-cd] [-m maxto] dialstring|netdir\n", argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/auth/httpauth.c

+++ b/sys/src/cmd/auth/httpauth.c

@@ -5,7 +5,7 @@

 void

 usage(void)

 {

-	fprint(2, "Usage:\n\t%s user pass\n\t%s authorization\n", argv0, argv0);

+	fprint(2, "usage:\n\t%s user pass\n\t%s authorization\n", argv0, argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/awk/main.c

+++ b/sys/src/cmd/awk/main.c

@@ -62,7 +62,7 @@

 	cmdname = argv[0];

 	if (argc == 1) {

-		Bprint(&stderr, "Usage: %s [-F fieldsep] [-mf n] [-mr n] [-v var=value] [-f programfile | 'program'] [file ...]\n", cmdname);

+		Bprint(&stderr, "usage: %s [-F fieldsep] [-d] [-mf n] [-mr n] [-safe] [-v var=value] [-f programfile | 'program'] [file ...]\n", cmdname);

 		exits("usage");

 	}

--- a/sys/src/cmd/bc.y

+++ b/sys/src/cmd/bc.y

@@ -956,7 +956,7 @@

 			sflag++;

 			break;

 		default:

-			fprint(2, "Usage: bc [-cdls] [file ...]\n");

+			fprint(2, "usage: bc [-cdls] [file ...]\n");

 			exits("usage");

 		}

 		argc--;

--- a/sys/src/cmd/colors.c

+++ b/sys/src/cmd/colors.c

@@ -102,7 +102,7 @@

 	if(argc){

 	Usage:

-		fprint(2, "Usage: %s [-rx]\n", argv0);

+		fprint(2, "usage: %s [-rx]\n", argv0);

 		exits("usage");

 	}

--- a/sys/src/cmd/compress/compress.c

+++ b/sys/src/cmd/compress/compress.c

@@ -112,9 +112,9 @@

 Usage()

 {

 #ifdef DEBUG

-	fprintf(stderr,"Usage: compress [-cdfDV] [-b maxbits] [file ...]\n");

+	fprintf(stderr,"usage: compress [-cdfDV] [-b maxbits] [file ...]\n");

 #else

-	fprintf(stderr,"Usage: compress [-cdfvV] [-b maxbits] [file ...]\n");

+	fprintf(stderr,"usage: compress [-cdfvV] [-b maxbits] [file ...]\n");

 #endif /* DEBUG */

 }

--- a/sys/src/cmd/db/main.c

+++ b/sys/src/cmd/db/main.c

@@ -93,7 +93,7 @@

 		sprint(b2, "/proc/%s/mem", argv[0]);

 		corfil = b2;

 	} else if (argc > 0) {

-		fprint(2, "Usage: db [-kw] [-m machine] [-I dir] [symfile] [pid]\n");

+		fprint(2, "usage: db [-kw] [-m machine] [-I dir] [symfile] [pid]\n");

 		exits("usage");

 	}

 	if (!symfil)

--- a/sys/src/cmd/dict/canonind.awk

+++ b/sys/src/cmd/dict/canonind.awk

@@ -1,8 +1,8 @@

 # turn output of mkindex into form needed by dict

 BEGIN {

 	if(ARGC != 2) {

-		print "Usage: awk -F'	' -f canonind.awk rawindex > index"

-		exit 1

+		print "usage: awk -F'	' -f canonind.awk rawindex > index"

+		exit usage

 	}

 	file = ARGV[1]

 	ARGV[1] = ""

--- a/sys/src/cmd/dict/dict.c

+++ b/sys/src/cmd/dict/dict.c

@@ -160,7 +160,7 @@

 	int i;

 	char *a, *b;

-	Bprint(bout, "Usage: %s [-d dict] [-k] [-c cmd] [word]\n", argv0);

+	Bprint(bout, "usage: %s [-k] [-d dict] [-c cmd] [pattern]\n", argv0);

 	Bprint(bout, "dictionaries (brackets mark dictionaries not present on this system):\n");

 	for(i = 0; dicts[i].name; i++){

 		a = b = "";

--- a/sys/src/cmd/getmap.c

+++ b/sys/src/cmd/getmap.c

@@ -131,7 +131,7 @@

 	int fd, id;

 	if(argc>2){

-		fprint(2, "Usage: %s colormap\n", argv[0]);

+		fprint(2, "usage: %s colormap\n", argv[0]);

 		exits("usage");

 	}

 	map = "rgbv";

--- a/sys/src/cmd/mk/main.c

+++ b/sys/src/cmd/mk/main.c

@@ -236,7 +236,7 @@

 badusage(void)

 {

-	fprint(2, "Usage: mk [-f file] [-n] [-a] [-e] [-t] [-k] [-i] [-d[egp]] [targets ...]\n");

+	fprint(2, "usage: mk [-f file] [-n] [-a] [-e] [-t] [-k] [-i] [-d[egp]] [targets ...]\n");

 	Exit();

 }

--- a/sys/src/cmd/mothra/mothra.c

+++ b/sys/src/cmd/mothra/mothra.c

@@ -331,7 +331,7 @@

 	switch(argc){

 	default:

 	Usage:

-		fprint(2, "Usage: %s [-dvak] [-m mtpt] [url]\n", argv0);

+		fprint(2, "usage: %s [-dvak] [-m mtpt] [url]\n", argv0);

 		exits("usage");

 	case 0:

 		url=getenv("url");

--- a/sys/src/cmd/ratrace.c

+++ b/sys/src/cmd/ratrace.c

@@ -156,7 +156,7 @@

 void

 usage(void)

 {

-	fprint(2, "Usage: ratrace [-c cmd [arg...]] | [pid]\n");

+	fprint(2, "usage: ratrace [-c cmd [arg...]] | [pid]\n");

 	threadexits("usage");

 }

--- a/sys/src/cmd/sum.c

+++ b/sys/src/cmd/sum.c

@@ -10,7 +10,7 @@

 void

 usage(void)

 {

-	fprint(2, "Usage: %s [-r5] [files]\n", argv0);

+	fprint(2, "usage: %s [-5r] [file ...]\n", argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/swap.c

+++ b/sys/src/cmd/swap.c

@@ -12,7 +12,7 @@

 	} ARGEND;

 	if(argc != 1){

-		fprint(2, "Usage: swap file\n");

+		fprint(2, "usage: swap file\n");

 		exits("usage");

 	}

--- a/sys/src/cmd/tcs/font/main.c

+++ b/sys/src/cmd/tcs/font/main.c

@@ -82,6 +82,6 @@

 static void

 usage(void)

 {

-	fprint(2, "Usage: %s [-s] from to\n", argv0);

+	fprint(2, "usage: %s [-s] from to\n", argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/tcs/font/merge.c

+++ b/sys/src/cmd/tcs/font/merge.c

@@ -65,7 +65,7 @@

 static void

 usage(void)

 {

-	fprint(2, "Usage: %s file ...\n", argv0);

+	fprint(2, "usage: %s file ...\n", argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/tcs/tcs.c

+++ b/sys/src/cmd/tcs/tcs.c

@@ -96,7 +96,7 @@

 void

 usage(void)

 {

-	fprint(2, "Usage: %s [-slv] [-f cs] [-t cs] [file ...]\n", argv0);

+	fprint(2, "usage: %s [-slcv] [-f ics] [-t ocs] [file ...]\n", argv0);

 	verbose = 1;

 	list();

 	exits("usage");

--- a/sys/src/cmd/trace.c

+++ b/sys/src/cmd/trace.c

@@ -124,7 +124,7 @@

 static void

 usage(void)

 {

-	fprint(2, "Usage: %s [-d profdev] [-w] [-v] [-t triggerproc] [processes]\n", argv0);

+	fprint(2, "usage: %s [-d profdev] [-w] [-v] [-t triggerproc] [pid ...]\n", argv0);

 	exits(nil);

 }

--- a/sys/src/cmd/urlencode.c

+++ b/sys/src/cmd/urlencode.c

@@ -26,7 +26,7 @@

 void

 usage(void)

 {

-	fprint(2, "Usage: %s [ -d ] [ file ]\n", argv0);

+	fprint(2, "usage: %s [ -d ] [ file ]\n", argv0);

 	exits("usage");

 }

--- a/sys/src/cmd/wc.c

+++ b/sys/src/cmd/wc.c

@@ -28,7 +28,7 @@

 	case 'b': pbadr++; break;

 	case 'c': pchar++; break;

 	default:

-		fprint(2, "Usage: %s [-lwrbc] [file ...]\n", argv0);

+		fprint(2, "usage: %s [-lwrbc] [file ...]\n", argv0);

 		exits("usage");

 	} ARGEND

 	if(pline+pword+prune+pbadr+pchar == 0) {

-- 

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