use snprint, and other minor corrections

Reference: /n/atom/patch/applied/nixsnprint2
Date: Thu Mar 27 06:56:02 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/port/devaudio.c	Thu Mar 27 06:55:18 2014
+++ /sys/src/nix/port/devaudio.c	Thu Mar 27 06:55:19 2014
@@ -193,7 +193,7 @@
 	adev = ac->adev;
 
 	fn = nil;
-	switch((ulong)c->qid.path){
+	switch((uint)c->qid.path){
 	case Qdir:
 		audiodir[Qaudio].length = adev->buffered ? adev->buffered(adev) : 0;
 		return devdirread(c, a, n, audiodir, nelem(audiodir), devgen);
@@ -215,7 +215,7 @@
 		qunlock(ac);
 		nexterror();
 	}
-	switch((ulong)c->qid.path){
+	switch((uint)c->qid.path){
 	case Qaudiostat:
 	case Qvolume:
 		/* generate the text on first read */
@@ -252,7 +252,7 @@
 	adev = ac->adev;
 
 	fn = nil;
-	switch((ulong)c->qid.path){
+	switch((uint)c->qid.path){
 	case Qaudio:
 		fn = adev->write;
 		break;
@@ -271,7 +271,7 @@
 		qunlock(ac);
 		nexterror();
 	}
-	switch((ulong)c->qid.path){
+	switch((uint)c->qid.path){
 	case Qaudioctl:
 	case Qvolume:
 		if(n >= sizeof(ac->buf))
@@ -341,7 +341,7 @@
 
 	ac = c->aux;
 	adev = ac->adev;
-	if((ulong)c->qid.path == Qaudio)
+	if(c->qid.path == Qaudio)
 		audiodir[Qaudio].length = adev->buffered ? adev->buffered(adev) : 0;
 	return devstat(c, dp, n, audiodir, nelem(audiodir), devgen);
 }
@@ -427,10 +427,9 @@
 		for(i = 0; vol[i].name != 0; i++){
 			if(vol[i].cap && (vol[i].cap & caps) == 0)
 				continue;
-			if(cistrcmp(vol[i].name, tok[0]))
+			if(cistrcmp(vol[i].name, tok[0]) != 0)
 				continue;
-	
-			if((ntok>2) && (!cistrcmp(tok[1], "out") || !cistrcmp(tok[1], "in")))
+			if(ntok > 2 && (cistrcmp(tok[1], "out") == 0 || !cistrcmp(tok[1], "in") == 0))
 				memmove(tok+1, tok+2, --ntok);
 
 			v[0] = 0;
--- /sys/src/nix/port/devcap.c	Thu Mar 27 06:55:21 2014
+++ /sys/src/nix/port/devcap.c	Thu Mar 27 06:55:21 2014
@@ -104,20 +104,6 @@
 	return c;
 }
 
-/*
-static char*
-hashstr(uchar *hash)
-{
-	static char buf[2*Hashlen+1];
-	int i;
-
-	for(i = 0; i < Hashlen; i++)
-		sprint(buf+2*i, "%2.2ux", hash[i]);
-	buf[2*Hashlen] = 0;
-	return buf;
-}
- */
-
 static Caphash*
 remcap(uchar *hash)
 {
--- /sys/src/nix/port/allocb.c	Thu Mar 27 06:55:23 2014
+++ /sys/src/nix/port/allocb.c	Thu Mar 27 06:55:24 2014
@@ -75,10 +75,8 @@
 
 	if(ialloc.bytes > sys->ialloc){
 		if((m1++%10000)==0){
-			if(mp++ > 1000){
-				active.exiting = 1;
+			if(mp++ > 1000)
 				exit(0);
-			}
 			iprint("iallocb: limited %lud/%llud\n",
 				ialloc.bytes, sys->ialloc);
 		}
@@ -87,10 +85,8 @@
 
 	if((b = _allocb(size)) == nil){
 		if((m2++%10000)==0){
-			if(mp++ > 1000){
-				active.exiting = 1;
+			if(mp++ > 1000)
 				exit(0);
-			}
 			iprint("iallocb: no memory %lud/%llud\n",
 				ialloc.bytes, sys->ialloc);
 		}
--- /sys/src/nix/port/devdup.c	Thu Mar 27 06:55:25 2014
+++ /sys/src/nix/port/devdup.c	Thu Mar 27 06:55:26 2014
@@ -29,10 +29,10 @@
 		return 0;
 	if(s & 1){
 		p = 0400;
-		sprint(up->genbuf, "%dctl", s/2);
+		snprint(up->genbuf, sizeof up->genbuf, "%dctl", s/2);
 	}else{
 		p = perm[f->mode&3];
-		sprint(up->genbuf, "%d", s/2);
+		snprint(up->genbuf, sizeof up->genbuf, "%d", s/2);
 	}
 	mkqid(&q, s+1, 0, QTFILE);
 	devdir(c, q, up->genbuf, 0, eve, p, dp);
--- /sys/src/nix/port/devenv.c	Thu Mar 27 06:55:28 2014
+++ /sys/src/nix/port/devenv.c	Thu Mar 27 06:55:29 2014
@@ -43,13 +43,13 @@
 
 	eg = envgrp(c);
 	rlock(eg);
-	e = 0;
+	e = nil;
 	if(name)
 		e = envlookup(eg, name, -1);
 	else if(s < eg->nent)
 		e = eg->ent[s];
 
-	if(e == 0) {
+	if(e == nil) {
 		runlock(eg);
 		return -1;
 	}
@@ -114,7 +114,7 @@
 		else
 			rlock(eg);
 		e = envlookup(eg, nil, c->qid.path);
-		if(e == 0) {
+		if(e == nil) {
 			if(trunc)
 				wunlock(eg);
 			else
@@ -124,7 +124,7 @@
 		if(trunc && e->value) {
 			e->qid.vers++;
 			free(e->value);
-			e->value = 0;
+			e->value = nil;
 			e->len = 0;
 		}
 		if(trunc)
@@ -200,7 +200,7 @@
 
 	eg = envgrp(c);
 	wlock(eg);
-	e = 0;
+	e = nil;
 	for(i=0; i<eg->nent; i++){
 		if(eg->ent[i]->qid.path == c->qid.path){
 			e = eg->ent[i];
@@ -211,7 +211,7 @@
 		}
 	}
 	wunlock(eg);
-	if(e == 0)
+	if(e == nil)
 		error(Enonexist);
 	free(e->name);
 	if(e->value)
@@ -244,7 +244,7 @@
 	eg = envgrp(c);
 	rlock(eg);
 	e = envlookup(eg, nil, c->qid.path);
-	if(e == 0) {
+	if(e == nil) {
 		runlock(eg);
 		error(Enonexist);
 	}
@@ -279,7 +279,7 @@
 	eg = envgrp(c);
 	wlock(eg);
 	e = envlookup(eg, nil, c->qid.path);
-	if(e == 0) {
+	if(e == nil) {
 		wunlock(eg);
 		error(Enonexist);
 	}
--- /sys/src/nix/port/devproc.c	Thu Mar 27 06:55:32 2014
+++ /sys/src/nix/port/devproc.c	Thu Mar 27 06:55:34 2014
@@ -610,7 +610,7 @@
 {
 	char buf[32];
 
-	return sprint(buf, "%lud", c->qid.vers);
+	return snprint(buf, sizeof buf, "%lud", c->qid.vers);
 }
 
 int