Store device names in the background

1 files changed, 176 insertions, 2 deletions

diff --git a/hcid/storage.c b/hcid/storage.c
index cd04b254..a025e674 100644
--- a/hcid/storage.c
+++ b/hcid/storage.c
@@ -34,15 +34,189 @@
 
 #include <stdio.h>
 #include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <syslog.h>
+#include <sys/file.h>
+#include <sys/stat.h>
 #include <sys/socket.h>
 
 #include <bluetooth/bluetooth.h>
 
 #include "hcid.h"
 
-#define DEVPATH "/etc/bluetooth/devices"
+#define DEVPATH "/var/cache/bluetooth/"
+
+struct name_list {
+	bdaddr_t bdaddr;
+	char name[249];
+	struct name_list *next;
+};
+
+static struct name_list *name_add(struct name_list *list, const bdaddr_t *bdaddr, const char *name)
+{
+	struct name_list *temp = list, *last = list;
+
+	if (!bacmp(bdaddr, BDADDR_ANY))
+		return list;
+
+	while (temp) {
+		if (!bacmp(&temp->bdaddr, bdaddr)) {
+			memcpy(temp->name, name, sizeof(temp->name));
+			return list;
+		}
+		temp = temp->next;
+	}
+
+	temp = malloc(sizeof(*temp));
+	if (!temp)
+		return list;
+
+	memset(temp, 0, sizeof(*temp));
+
+	bacpy(&temp->bdaddr, bdaddr);
+	memcpy(temp->name, name, sizeof(temp->name));
+	temp->next = NULL;
+
+	if (!list)
+		return temp;
+
+	while (last->next)
+		last = last->next;
+
+	last->next = temp;
+
+	return list;
+}
+
+static struct name_list *name_free(struct name_list *list)
+{
+	struct name_list *temp = list;
+
+	if (!list)
+		return NULL;
+
+	while (list->next) {
+		temp = list;
+		list = list->next;
+		free(temp);
+	}
+
+	return NULL;
+}
+
+#define name_foreach(list, entry) \
+	for (entry = list; entry; entry = entry->next)
+
+static int create_dirs(const char *filename, mode_t mode)
+{
+	struct stat st;
+	char dir[PATH_MAX + 1], *prev, *next;
+	int err;
+
+	err = stat(filename, &st);
+	if (!err && S_ISREG(st.st_mode))
+		return 0;
+
+	memset(dir, 0, PATH_MAX + 1);
+	strcat(dir, "/");
+
+	prev = strchr(filename, '/');
+
+	while (prev) {
+		next = strchr(prev + 1, '/');
+		if (!next)
+			break;
+
+		if (next - prev == 1) {
+			prev = next;
+			continue;
+		}
+
+		strncat(dir, prev + 1, next - prev);
+		mkdir(dir, mode);
+
+		prev = next;
+	}
+
+	return 0;
+}
 
 int write_device_name(const bdaddr_t *local, const bdaddr_t *peer, const char *name)
 {
-	return -EIO;
+	struct name_list *temp, *list = NULL;
+	mode_t mode = S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
+	mode_t mask = S_IWGRP | S_IWOTH;
+	char filename[PATH_MAX + 1];
+	char addr[18], str[249], *buf, *ptr;
+	bdaddr_t bdaddr;
+	struct stat st;
+	int fd, pos, err = 0;
+
+	ba2str(local, addr);
+	snprintf(filename, PATH_MAX, "%s/%s/names", DEVPATH, addr);
+
+	umask(mask);
+	create_dirs(filename, mode);
+
+	fd = open(filename, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+	if (fd < 0)
+		return -errno;
+
+	if (flock(fd, LOCK_EX) < 0) {
+		err = -errno;
+		goto close;
+	}
+
+	if (fstat(fd, &st) < 0) {
+		err = -errno;
+		goto unlock;
+	}
+
+	buf = malloc(st.st_size + 200);
+	if (!buf) {
+		err = -ENOMEM;
+		goto unlock;
+	}
+
+	if (st.st_size > 0) {
+		read(fd, buf, st.st_size);
+
+		ptr = buf;
+
+		while (sscanf(ptr, "%17s %[^\n]\n%n", addr, str, &pos) != EOF) {
+			str2ba(addr, &bdaddr);
+			list = name_add(list, &bdaddr, str);
+			ptr += pos;
+		};
+
+		lseek(fd, 0, SEEK_SET);
+		ftruncate(fd, 0);
+	}
+
+	list = name_add(list, peer, name);
+	if (!list) {
+		err = -EIO;
+		goto unlock;
+	}
+
+	name_foreach(list, temp) {
+		ba2str(&temp->bdaddr, addr);
+		snprintf(buf, 200, "%s %s\n", addr, temp->name);
+		write(fd, buf, strlen(buf));
+	}
+
+unlock:
+	flock(fd, LOCK_UN);
+
+close:
+	close(fd);
+	name_free(list);
+	return err;
+}
+
+int write_link_key(const bdaddr_t *local, const bdaddr_t *peer, const unsigned char *key, const int type)
+{
+	return 0;
 }