diff --git a/sndiod/abuf.c b/sndiod/abuf.c
index d19a74a..7068312 100644
--- a/sndiod/abuf.c
+++ b/sndiod/abuf.c
@@ -72,7 +72,7 @@ abuf_done(struct abuf *buf)
  * Get a pointer to the readable block
  */
 unsigned char *
-abuf_rgetblk(struct abuf *buf, unsigned int *rsize)
+abuf_rgetblk(struct abuf *buf, int *rsize)
 {
 	unsigned int count;
 
@@ -87,10 +87,10 @@ abuf_rgetblk(struct abuf *buf, unsigned int *rsize)
  * Discard the block at the start postion.
  */
 void
-abuf_rdiscard(struct abuf *buf, unsigned int count)
+abuf_rdiscard(struct abuf *buf, int count)
 {
 #ifdef DEBUG
-	if (count > buf->used) {
+	if (count < 0 || count > buf->used) {
 		log_puts("abuf_rdiscard: bad count = ");
 		log_putu(count);
 		log_puts("\n");
@@ -107,10 +107,10 @@ abuf_rdiscard(struct abuf *buf, unsigned int count)
  * Commit the data written at the end postion.
  */
 void
-abuf_wcommit(struct abuf *buf, unsigned int count)
+abuf_wcommit(struct abuf *buf, int count)
 {
 #ifdef DEBUG
-	if (count > (buf->len - buf->used)) {
+	if (count < 0 || count > (buf->len - buf->used)) {
 		log_puts("abuf_wcommit: bad count = ");
 		log_putu(count);
 		log_puts("\n");
@@ -124,9 +124,9 @@ abuf_wcommit(struct abuf *buf, unsigned int count)
  * Get a pointer to the writable block
  */
 unsigned char *
-abuf_wgetblk(struct abuf *buf, unsigned int *rsize)
+abuf_wgetblk(struct abuf *buf, int *rsize)
 {
-	unsigned int end, avail, count;
+	int end, avail, count;
 
 	end = buf->start + buf->used;
 	if (end >= buf->len)
diff --git a/sndiod/abuf.h b/sndiod/abuf.h
index c7aec4c..b89acff 100644
--- a/sndiod/abuf.h
+++ b/sndiod/abuf.h
@@ -18,19 +18,19 @@
 #define ABUF_H
 
 struct abuf {
-	unsigned int bpf;	/* bytes per frames */
-	unsigned int start;	/* offset (frames) where stored data starts */
-	unsigned int used;	/* frames stored in the buffer */
-	unsigned int len;	/* total size of the buffer (frames) */
+	int bpf;	/* bytes per frames */
+	int start;	/* offset (frames) where stored data starts */
+	int used;	/* frames stored in the buffer */
+	int len;	/* total size of the buffer (frames) */
 	unsigned char *data;
 };
 
 void abuf_init(struct abuf *, unsigned int, unsigned int);
 void abuf_done(struct abuf *);
 void abuf_log(struct abuf *);
-unsigned char *abuf_rgetblk(struct abuf *, unsigned int *);
-unsigned char *abuf_wgetblk(struct abuf *, unsigned int *);
-void abuf_rdiscard(struct abuf *, unsigned int);
-void abuf_wcommit(struct abuf *, unsigned int);
+unsigned char *abuf_rgetblk(struct abuf *, int *);
+unsigned char *abuf_wgetblk(struct abuf *, int *);
+void abuf_rdiscard(struct abuf *, int);
+void abuf_wcommit(struct abuf *, int);
 
 #endif /* !defined(ABUF_H) */
diff --git a/sndiod/file.c b/sndiod/file.c
index 1a7c033..8210f7a 100644
--- a/sndiod/file.c
+++ b/sndiod/file.c
@@ -442,13 +442,11 @@ filelist_init(void)
 	it.it_interval.tv_usec = TIMER_USEC;
 	it.it_value.tv_sec = 0;
 	it.it_value.tv_usec = TIMER_USEC;
-#if 0
 	if (setitimer(ITIMER_REAL, &it, NULL) < 0) {
 		perror("setitimer");
 		exit(1);
 	}
 	log_sync = 0;
-#endif
 	timo_init();
 }
 
diff --git a/sndiod/midi.c b/sndiod/midi.c
index 02aba24..37879e4 100644
--- a/sndiod/midi.c
+++ b/sndiod/midi.c
@@ -235,7 +235,7 @@ int
 midi_in(struct midi *ep)
 {
 	unsigned char c, *idata;
-	unsigned int i, icount;
+	int i, icount;
 
 	if (ep->ibuf.used == 0)
 		return 0;
@@ -309,7 +309,7 @@ void
 midi_out(struct midi *oep, unsigned char *idata, int icount)	
 {
 	unsigned char *odata;
-	unsigned ocount;
+	int ocount;
 
 	while (icount > 0) {
 		if (oep->obuf.used == oep->obuf.len) {
diff --git a/sndiod/miofile.c b/sndiod/miofile.c
index 46ab34a..fe79005 100644
--- a/sndiod/miofile.c
+++ b/sndiod/miofile.c
@@ -102,7 +102,7 @@ miofile_in(void *arg)
 	struct miofile *f = arg;
 	struct midi *ep = f->port->midi;
 	unsigned char *data;
-	unsigned int n, count;
+	int n, count;
 
 	for (;;) {
 		data = abuf_wgetblk(&ep->ibuf, &count);
@@ -124,7 +124,7 @@ miofile_out(void *arg)
 	struct miofile *f = arg;
 	struct midi *ep = f->port->midi;
 	unsigned char *data;
-	unsigned int n, count;
+	int n, count;
 
 	for (;;) {
 		data = abuf_rgetblk(&ep->obuf, &count);
diff --git a/sndiod/sndiod.c b/sndiod/sndiod.c
index cfaae25..5158203 100644
--- a/sndiod/sndiod.c
+++ b/sndiod/sndiod.c
@@ -23,6 +23,7 @@
 #include <err.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <grp.h>
 #include <limits.h>
 #include <pwd.h>
 #include <signal.h>
diff --git a/sndiod/sock.c b/sndiod/sock.c
index 3f365e0..05a9551 100644
--- a/sndiod/sock.c
+++ b/sndiod/sock.c
@@ -507,9 +507,8 @@ int
 sock_rdata(struct sock *f)
 {
 	struct abuf *buf;
-	unsigned int count;
-	char *data;
-	int n;
+	unsigned char *data;
+	int n, count;
 
 #ifdef DEBUG
 	if (f->rtodo == 0) {
@@ -581,10 +580,9 @@ int
 sock_wdata(struct sock *f)
 {
 	static unsigned char dummy[AMSG_DATAMAX];
-	int n;
-	char *data = NULL;
-	unsigned int count;
+	unsigned char *data = NULL;
 	struct abuf *buf = NULL;
+	int n, count;
 
 #ifdef DEBUG
 	if (f->wtodo == 0) {