- Some errno usage fixes (bluez-libs).

diff -X /home/lcapitulino/kernels/2.6/dontdiff -Nparu a/src/hci.c a~/src/hci.c
@@ -463,17 +463,15 @@ int hci_for_each_dev(int flag, int (*fun
 	struct hci_dev_list_req *dl;
 	struct hci_dev_req *dr;
 	int dev_id = -1;
-	int i, sk;
+	int err, i, sk;
 
 	sk = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
 	if (sk < 0)
 		return -1;
 
 	dl = malloc(HCI_MAX_DEV * sizeof(*dr) + sizeof(*dl));
-	if (!dl) {
-		close(sk);
-		return -1;
-	}
+	if (!dl)
+		goto done;
 
 	dl->dev_num = HCI_MAX_DEV;
 	dr = dl->dev_req;

@@ -489,9 +487,15 @@ int hci_for_each_dev(int flag, int (*fun
 			}
 	}
 
+	if (dev_id < 0)
+		errno = ENODEV;
+
 done:
+	err = errno;
 	close(sk);
-	free(dl);
+	if (dl)
+		free(dl);
+	errno = err;
 	return dev_id;
 }
 

@@ -545,17 +549,20 @@ int hci_devid(const char *str)
 
 int hci_devinfo(int dev_id, struct hci_dev_info *di)
 {
-	int s, err;
+	int s, err, ret;
 
 	s = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
 	if (s < 0)
 		return s;
 
 	di->dev_id = dev_id;
-	err = ioctl(s, HCIGETDEVINFO, (void *) di);
+	ret = ioctl(s, HCIGETDEVINFO, (void *) di);
+
+	err = errno;
 	close(s);
+	errno = err;
 
-	return err;
+	return ret;
 }
 
 int hci_devba(int dev_id, bdaddr_t *bdaddr)

@@ -579,7 +586,8 @@ int hci_inquiry(int dev_id, int len, int
 	struct hci_inquiry_req *ir;
 	uint8_t num_rsp = nrsp;
 	void *buf;
-	int s, err;
+	int ret = -1;
+	int size, s, err;
 
 	if (nrsp <= 0) {
 		num_rsp = 0;

@@ -596,10 +604,8 @@ int hci_inquiry(int dev_id, int len, int
 		return -1;
 
 	buf = malloc(sizeof(*ir) + (sizeof(inquiry_info) * (nrsp)));
-	if (!buf) {
-		close(s);
-		return -1;
-	}
+	if (!buf)
+		goto out;
 
 	ir = buf;
 	ir->dev_id  = dev_id;

@@ -615,23 +621,29 @@ int hci_inquiry(int dev_id, int len, int
 		ir->lap[2] = 0x9e;
 	}
 
-	err = ioctl(s, HCIINQUIRY, (unsigned long) buf);
-	close(s);
-
-	if (!err) {
-		int size = sizeof(inquiry_info) * ir->num_rsp;
+	ret = ioctl(s, HCIINQUIRY, (unsigned long) buf);
+	if (ret < 0)
+		goto out;
+
+	size = sizeof(inquiry_info) * ir->num_rsp;
+
+	if (!*ii)
+		*ii = (void *) malloc(size);
+
+	if (*ii) {
+		memcpy((void *) *ii, buf + sizeof(*ir), size);
+		ret = ir->num_rsp;
+	} else
+		ret = -1;
 
-		if (!*ii) 
-			*ii = (void *) malloc(size);
+out:
+	err = errno;
+	close(s);
+	if (buf)
+		free(buf);
+	errno = err;
 
-		if (*ii) {
-			memcpy((void *) *ii, buf + sizeof(*ir), size);
-			err = ir->num_rsp;
-		} else
-			err = -1;
-	}
-	free(buf);
-	return err;
+	return ret;
 }
 
 /* Open HCI device.