Logstorage: Check if given path is writable in logstorage control application

Signed-off-by: Christoph Lipka <clipka@jp.adit-jv.com>

3 files changed, 37 insertions, 0 deletions

diff --git a/src/console/logstorage/dlt-logstorage-common.c b/src/console/logstorage/dlt-logstorage-common.c
index a2f60a0..592da25 100644
--- a/src/console/logstorage/dlt-logstorage-common.c
+++ b/src/console/logstorage/dlt-logstorage-common.c
@@ -58,6 +58,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <pthread.h>
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -234,6 +235,28 @@ int dlt_logstorage_check_config_file(char *mnt_point)
     return ret;
 }
 
+/** @brief Check if given mount point is writable
+ *
+ * @param mnt_point The mount point to check
+ *
+ * @return 1 if the file is writable, 0 otherwise.
+ */
+int dlt_logstorage_check_directory_permission(char *mnt_point)
+{
+    if (mnt_point == NULL)
+    {
+        pr_error("Given mount point is NULL\n");
+        return 0;
+    }
+
+    if (access(mnt_point, W_OK) == 0)
+    {
+        return 1;
+    }
+
+    return 0;
+}
+
 /** @brief Prepares the body of the message to be send to DLT
  *
  * @param body A pointer to the MsgBody structure pointer
diff --git a/src/console/logstorage/dlt-logstorage-common.h b/src/console/logstorage/dlt-logstorage-common.h
index 712f2e3..a1c0994 100644
--- a/src/console/logstorage/dlt-logstorage-common.h
+++ b/src/console/logstorage/dlt-logstorage-common.h
@@ -80,4 +80,12 @@ int dlt_logstorage_send_event(int, char *);
  */
 int dlt_logstorage_check_config_file(char *);
 
+/** @brief Check if given mount point is writable
+ *
+ * @param mnt_point The mount point to check
+ *
+ * @return 1 if the file is writable, 0 otherwise.
+ */
+int dlt_logstorage_check_directory_permission(char *mnt_point);
+
 #endif
diff --git a/src/console/logstorage/dlt-logstorage-ctrl.c b/src/console/logstorage/dlt-logstorage-ctrl.c
index b4d2b92..b213501 100644
--- a/src/console/logstorage/dlt-logstorage-ctrl.c
+++ b/src/console/logstorage/dlt-logstorage-ctrl.c
@@ -374,6 +374,12 @@ static int dlt_logstorage_ctrl_single_request()
         return -1;
     }
 
+    if (!dlt_logstorage_check_directory_permission(get_default_path()))
+    {
+        pr_error("'%s' is not writable\n", get_default_path());
+        return -1;
+    }
+
     /* Initializing the communication with the daemon */
     while (dlt_control_init(analyze_response, get_ecuid(), get_verbosity()) &&
            !dlt_logstorage_must_exit())