diff --git a/compat/fakehid.c b/compat/fakehid.c
index f0d8893..66161b3 100644
--- a/compat/fakehid.c
+++ b/compat/fakehid.c
@@ -60,20 +60,19 @@ static void sig_term(int sig)
 	__io_canceled = 1;
 }
 
-static void send_event(int fd, uint16_t type, uint16_t code, int32_t value)
+static int send_event(int fd, uint16_t type, uint16_t code, int32_t value)
 {
 	struct uinput_event event;
-	int len;
 
 	if (fd <= fileno(stderr))
-		return;
+		return -EINVAL;
 
 	memset(&event, 0, sizeof(event));
 	event.type = type;
 	event.code = code;
 	event.value = value;
 
-	len = write(fd, &event, sizeof(event));
+	return write(fd, &event, sizeof(event));
 }
 
 static int uinput_create(char *name, int keyboard, int mouse)
diff --git a/compat/hidd.c b/compat/hidd.c
index 2dae3a7..64dd455 100644
--- a/compat/hidd.c
+++ b/compat/hidd.c
@@ -237,14 +237,13 @@ static int request_encryption(bdaddr_t *src, bdaddr_t *dst)
 	return err;
 }
 
-static void enable_sixaxis(int csk)
+static int enable_sixaxis(int csk)
 {
 	const unsigned char buf[] = {
 		0x53 /*HIDP_TRANS_SET_REPORT | HIDP_DATA_RTYPE_FEATURE*/,
 		0xf4,  0x42, 0x03, 0x00, 0x00 };
-	int err;
 
-	err = write(csk, buf, sizeof(buf));
+	return write(csk, buf, sizeof(buf));
 }
 
 static int create_device(int ctl, int csk, int isk, uint8_t subclass, int nosdp, int nocheck, int bootonly, int encrypt, int timeout)
diff --git a/cups/hcrp.c b/cups/hcrp.c
index 7aafcdc..a93dda0 100644
--- a/cups/hcrp.c
+++ b/cups/hcrp.c
@@ -94,8 +94,13 @@ static int hcrp_credit_grant(int sk, uint16_t tid, uint32_t credit)
 	memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
 	memcpy(buf + HCRP_PDU_HDR_SIZE, &cp, HCRP_CREDIT_GRANT_CP_SIZE);
 	len = write(sk, buf, HCRP_PDU_HDR_SIZE + HCRP_CREDIT_GRANT_CP_SIZE);
+	if (len < 0)
+		return len;
 
 	len = read(sk, buf, sizeof(buf));
+	if (len < 0)
+		return len;
+
 	memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
 	memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_CREDIT_GRANT_RP_SIZE);
 
@@ -119,8 +124,13 @@ static int hcrp_credit_request(int sk, uint16_t tid, uint32_t *credit)
 	hdr.plen = htons(0);
 	memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
 	len = write(sk, buf, HCRP_PDU_HDR_SIZE);
+	if (len < 0)
+		return len;
 
 	len = read(sk, buf, sizeof(buf));
+	if (len < 0)
+		return len;
+
 	memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
 	memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_CREDIT_REQUEST_RP_SIZE);
 
@@ -147,8 +157,13 @@ static int hcrp_get_lpt_status(int sk, uint16_t tid, uint8_t *lpt_status)
 	hdr.plen = htons(0);
 	memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
 	len = write(sk, buf, HCRP_PDU_HDR_SIZE);
+	if (len < 0)
+		return len;
 
 	len = read(sk, buf, sizeof(buf));
+	if (len < 0)
+		return len;
+
 	memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
 	memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_GET_LPT_STATUS_RP_SIZE);
 
diff --git a/input/device.c b/input/device.c
index 1d9a313..aa593e0 100644
--- a/input/device.c
+++ b/input/device.c
@@ -243,17 +243,16 @@ static int decode_key(const char *str)
 	return key;
 }
 
-static void send_event(int fd, uint16_t type, uint16_t code, int32_t value)
+static int send_event(int fd, uint16_t type, uint16_t code, int32_t value)
 {
 	struct uinput_event event;
-	int err;
 
 	memset(&event, 0, sizeof(event));
 	event.type	= type;
 	event.code	= code;
 	event.value	= value;
 
-	err = write(fd, &event, sizeof(event));
+	return write(fd, &event, sizeof(event));
 }
 
 static void send_key(int fd, uint16_t key)
diff --git a/input/server.c b/input/server.c
index d98018b..7fd00f2 100644
--- a/input/server.c
+++ b/input/server.c
@@ -91,8 +91,9 @@ static void connect_event_cb(GIOChannel *chan, GError *err, gpointer data)
 	/* Send unplug virtual cable to unknown devices */
 	if (ret == -ENOENT && psm == L2CAP_PSM_HIDP_CTRL) {
 		unsigned char unplug = 0x15;
-		int err, sk = g_io_channel_unix_get_fd(chan);
-		err = write(sk, &unplug, sizeof(unplug));
+		int sk = g_io_channel_unix_get_fd(chan);
+		if (write(sk, &unplug, sizeof(unplug)) < 0)
+			error("Unable to send virtual cable unplug");
 	}
 
 	g_io_channel_shutdown(chan, TRUE, NULL);
diff --git a/src/sdp-xml.c b/src/sdp-xml.c
index f821376..d7b2aef 100644
--- a/src/sdp-xml.c
+++ b/src/sdp-xml.c
@@ -47,7 +47,6 @@ static void convert_raw_data_to_xml(sdp_data_t *value, int indent_level,
 	int i, hex;
 	char buf[STRBUFSIZE];
 	char indent[MAXINDENT];
-	char next_indent[MAXINDENT];
 
 	if (!value)
 		return;
@@ -55,15 +54,10 @@ static void convert_raw_data_to_xml(sdp_data_t *value, int indent_level,
 	if (indent_level >= MAXINDENT)
 		indent_level = MAXINDENT - 2;
 
-	for (i = 0; i < indent_level; i++) {
+	for (i = 0; i < indent_level; i++)
 		indent[i] = '\t';
-		next_indent[i] = '\t';
-	}
 
 	indent[i] = '\0';
-	next_indent[i] = '\t';
-	next_indent[i + 1] = '\0';
-
 	buf[STRBUFSIZE - 1] = '\0';
 
 	switch (value->dtd) {
diff --git a/src/sdpd-request.c b/src/sdpd-request.c
index ddec935..9920e9b 100644
--- a/src/sdpd-request.c
+++ b/src/sdpd-request.c
@@ -961,7 +961,6 @@ static void process_request(sdp_req_t *req)
 	sdp_pdu_hdr_t *rsphdr;
 	sdp_buf_t rsp;
 	uint8_t *buf = malloc(USHRT_MAX);
-	int sent = 0;
 	int status = SDP_INVALID_SYNTAX;
 
 	memset(buf, 0, USHRT_MAX);
@@ -1035,7 +1034,8 @@ send_rsp:
 	rsp.data = buf;
 
 	/* stream the rsp PDU */
-	sent = send(req->sock, rsp.data, rsp.data_size, 0);
+	if (send(req->sock, rsp.data, rsp.data_size, 0) < 0)
+		error("send: %s (%d)", strerror(errno), errno);
 
 	SDPDBG("Bytes Sent : %d", sent);
 
diff --git a/test/hciemu.c b/test/hciemu.c
index 66f99a9..07bf3be 100644
--- a/test/hciemu.c
+++ b/test/hciemu.c
@@ -203,7 +203,6 @@ static int write_snoop(int fd, int type, int incoming, unsigned char *buf, int l
 	struct timeval tv;
 	uint32_t size = len;
 	uint64_t ts;
-	int err;
 
 	if (fd < 0)
 		return -1;
@@ -221,8 +220,11 @@ static int write_snoop(int fd, int type, int incoming, unsigned char *buf, int l
 	if (type == HCI_COMMAND_PKT || type == HCI_EVENT_PKT)
 		pkt.flags |= ntohl(0x02);
 
-	err = write(fd, &pkt, BTSNOOP_PKT_SIZE);
-	err = write(fd, buf, size);
+	if (write(fd, &pkt, BTSNOOP_PKT_SIZE) < 0)
+		return -errno;
+
+	if (write(fd, buf, size) < 0)
+		return -errno;
 
 	return 0;
 }
@@ -861,7 +863,7 @@ static gboolean io_acl_data(GIOChannel *chan, GIOCondition cond, gpointer data)
 	unsigned char buf[HCI_MAX_FRAME_SIZE], *ptr;
 	hci_acl_hdr *ah;
 	uint16_t flags;
-	int fd, err, len;
+	int fd, len;
 
 	if (cond & G_IO_NVAL) {
 		g_io_channel_unref(chan);
@@ -898,7 +900,8 @@ static gboolean io_acl_data(GIOChannel *chan, GIOCondition cond, gpointer data)
 
 	write_snoop(vdev.dd, HCI_ACLDATA_PKT, 1, buf, len);
 
-	err = write(vdev.fd, buf, len);
+	if (write(vdev.fd, buf, len) < 0)
+		return FALSE;
 
 	return TRUE;
 }
diff --git a/test/hstest.c b/test/hstest.c
index 08f2257..ac68059 100644
--- a/test/hstest.c
+++ b/test/hstest.c
@@ -159,7 +159,7 @@ int main(int argc, char *argv[])
 
 	char *filename;
 	mode_t filemode;
-	int err, mode = 0;
+	int mode = 0;
 	int dd, rd, sd, fd;
 	uint16_t sco_handle, sco_mtu, vs;
 
@@ -244,8 +244,10 @@ int main(int argc, char *argv[])
 
 	fprintf(stderr, "SCO audio channel connected (handle %d, mtu %d)\n", sco_handle, sco_mtu);
 
-	if (mode == RECORD)
-		err = write(rd, "RING\r\n", 6);
+	if (mode == RECORD) {
+		if (write(rd, "RING\r\n", 6) < 0)
+			return -errno;
+	}
 
 	maxfd = (rd > sd) ? rd : sd;
 
diff --git a/test/rctest.c b/test/rctest.c
index b3804f5..9754f52 100644
--- a/test/rctest.c
+++ b/test/rctest.c
@@ -417,13 +417,11 @@ static void recv_mode(int sk)
 	struct timeval tv_beg, tv_end, tv_diff;
 	char ts[30];
 	long total;
-	uint32_t seq;
 
 	syslog(LOG_INFO, "Receiving ...");
 
 	memset(ts, 0, sizeof(ts));
 
-	seq = 0;
 	while (1) {
 		gettimeofday(&tv_beg,NULL);
 		total = 0;
diff --git a/test/scotest.c b/test/scotest.c
index 50b622a..17bd8a6 100644
--- a/test/scotest.c
+++ b/test/scotest.c
@@ -216,11 +216,9 @@ static void recv_mode(int sk)
 {
 	struct timeval tv_beg,tv_end,tv_diff;
 	long total;
-	uint32_t seq;
 
 	syslog(LOG_INFO, "Receiving ...");
 
-	seq = 0;
 	while (1) {
 		gettimeofday(&tv_beg, NULL);
 		total = 0;
diff --git a/test/test-textfile.c b/test/test-textfile.c
index 970e9e7..e0a0c5b 100644
--- a/test/test-textfile.c
+++ b/test/test-textfile.c
@@ -44,25 +44,28 @@ int main(int argc, char *argv[])
 	char filename[] = "/tmp/textfile";
 	char key[18], value[512], *str;
 	unsigned int i, j, size, max = 10;
-	int fd, err;
+	int fd;
 
 	size = getpagesize();
 	printf("System uses a page size of %d bytes\n\n", size);
 
 	fd = creat(filename, 0644);
-	err = ftruncate(fd, 0);
+	if (ftruncate(fd, 0) < 0)
+		return -errno;
 
 	memset(value, 0, sizeof(value));
-	for (i = 0; i < (size / sizeof(value)); i++)
-		err = write(fd, value, sizeof(value));
+	for (i = 0; i < (size / sizeof(value)); i++) {
+		if (write(fd, value, sizeof(value)) < 0)
+			return -errno;
+	}
 
 	close(fd);
 
 	sprintf(key, "11:11:11:11:11:11");
 	str = textfile_get(filename, key);
 
-	err = truncate(filename, 0);
-
+	if (truncate(filename, 0) < 0)
+		return -errno;
 
 	sprintf(key, "00:00:00:00:00:00");
 	if (textfile_del(filename, key) < 0)
diff --git a/tools/hciattach.c b/tools/hciattach.c
index e4d5aa1..93bdaac 100644
--- a/tools/hciattach.c
+++ b/tools/hciattach.c
@@ -351,12 +351,12 @@ static int bcsp_max_retries = 10;
 static void bcsp_tshy_sig_alarm(int sig)
 {
 	unsigned char bcsp_sync_pkt[10] = {0xc0,0x00,0x41,0x00,0xbe,0xda,0xdc,0xed,0xed,0xc0};
-	int len;
 	static int retries = 0;
 
 	if (retries < bcsp_max_retries) {
 		retries++;
-		len = write(serial_fd, &bcsp_sync_pkt, 10);
+		if (write(serial_fd, &bcsp_sync_pkt, 10) < 0)
+			return;
 		alarm(1);
 		return;
 	}
@@ -369,12 +369,12 @@ static void bcsp_tshy_sig_alarm(int sig)
 static void bcsp_tconf_sig_alarm(int sig)
 {
 	unsigned char bcsp_conf_pkt[10] = {0xc0,0x00,0x41,0x00,0xbe,0xad,0xef,0xac,0xed,0xc0};
-	int len;
 	static int retries = 0;
 
 	if (retries < bcsp_max_retries){
 		retries++;
-		len = write(serial_fd, &bcsp_conf_pkt, 10);
+		if (write(serial_fd, &bcsp_conf_pkt, 10) < 0)
+			return;
 		alarm(1);
 		return;
 	}
@@ -451,7 +451,8 @@ static int bcsp(int fd, struct uart_t *u, struct termios *ti)
 		}
 
 		if (!memcmp(bcspp, bcspsync, 4)) {
-			len = write(fd, &bcsp_sync_resp_pkt,10);
+			if (write(fd, &bcsp_sync_resp_pkt,10) < 0)
+				return -1;
 		} else if (!memcmp(bcspp, bcspsyncresp, 4))
 			break;
 	}
@@ -500,6 +501,11 @@ static int bcsp(int fd, struct uart_t *u, struct termios *ti)
 			len = write(fd, &bcsp_conf_resp_pkt, 10);
 		else if (!memcmp(bcspp, bcspconfresp,  4))
 			break;
+		else
+			continue;
+
+		if (len < 0)
+			return -errno;
 	}
 
 	/* State = garrulous */
diff --git a/tools/hcitool.c b/tools/hcitool.c
index a117449..ece187c 100644
--- a/tools/hcitool.c
+++ b/tools/hcitool.c
@@ -2351,7 +2351,6 @@ static int print_advertising_devices(int dd, uint8_t filter_type)
 	unsigned char buf[HCI_MAX_EVENT_SIZE], *ptr;
 	struct hci_filter nf, of;
 	socklen_t olen;
-	hci_event_hdr *hdr;
 	int num, len;
 
 	olen = sizeof(of);
@@ -2382,7 +2381,6 @@ static int print_advertising_devices(int dd, uint8_t filter_type)
 			goto done;
 		}
 
-		hdr = (void *) (buf + 1);
 		ptr = buf + (1 + HCI_EVENT_HDR_SIZE);
 		len -= (1 + HCI_EVENT_HDR_SIZE);