[component] Sync to master (366e28f47682f76b3f6df85c3dcbd9785a01fa39).

components/dfs/src/dfs.c

@@ -18,6 +18,10 @@
 #include <lwp.h>
 #endif
 
+#ifdef RT_USING_DFS_DEVFS
+#include <libc.h>
+#endif
+
 /* Global variables */
 const struct dfs_filesystem_ops *filesystem_operation_table[DFS_FILESYSTEM_TYPES_MAX];
 struct dfs_filesystem filesystem_table[DFS_FILESYSTEMS_MAX];
@@ -212,6 +216,11 @@ struct dfs_fd *fd_get(int fd)
     struct dfs_fd *d;
     struct dfs_fdtable *fdt;
 
+#ifdef RT_USING_DFS_DEVFS
+    if ((0 <= fd) && (fd <= 2))
+        fd = libc_stdio_get_console();
+#endif
+
     fdt = dfs_fdtable_get();
     fd = fd - DFS_FD_OFFSET;
     if (fd < 0 || fd >= fdt->maxfd)

components/libc/compilers/armlibc/stubs.c

@@ -270,7 +270,10 @@ long _sys_flen(FILEHANDLE fh)
 
 int _sys_istty(FILEHANDLE fh)
 {
-    return 0;
+    if((STDIN <= fh) && (fh <= STDERR))
+        return 1;
+    else
+        return 0;
 }
 
 int remove(const char *filename)

components/libc/compilers/newlib/syscalls.c

@@ -9,6 +9,8 @@
 #include <reent.h>
 #include <sys/errno.h>
 #include <sys/time.h>
+#include <stdio.h>
+
 #include <rtthread.h>
 
 #ifdef RT_USING_DFS
@@ -218,7 +220,7 @@ _ssize_t
 _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 {
 #ifndef RT_USING_DFS
-    if (fd == 0)
+    if (fileno(stdout) == fd)
     {
         rt_device_t console;
 

components/net/at/at_socket/at_socket.c

@@ -572,10 +572,16 @@ __exit:
 
     if (result < 0)
     {
-        at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
+        if (sock != RT_NULL)
+        {
+            at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
+        }
     }
 
-    at_do_event_changes(sock, AT_EVENT_SEND, RT_TRUE);
+    if (sock)
+    {
+        at_do_event_changes(sock, AT_EVENT_SEND, RT_TRUE);
+    }
     
     return result;
 }
@@ -699,24 +705,27 @@ int at_recvfrom(int socket, void *mem, size_t len, int flags, struct sockaddr *f
 
 __exit:
 
-    if (recv_len > 0)
+    if (sock != RT_NULL)
     {
-        result = recv_len;
-        at_do_event_changes(sock, AT_EVENT_RECV, RT_FALSE);
-        errno = 0;
-        if (!rt_slist_isempty(&sock->recvpkt_list))
+        if (recv_len > 0)
         {
-            at_do_event_changes(sock, AT_EVENT_RECV, RT_TRUE);
+            result = recv_len;
+            at_do_event_changes(sock, AT_EVENT_RECV, RT_FALSE);
+            errno = 0;
+            if (!rt_slist_isempty(&sock->recvpkt_list))
+            {
+                at_do_event_changes(sock, AT_EVENT_RECV, RT_TRUE);
+            }
+            else
+            {
+                at_do_event_clean(sock, AT_EVENT_RECV);
+            }
         }
         else
         {
-            at_do_event_clean(sock, AT_EVENT_RECV);
+            at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
         }
     }
-    else
-    {
-        at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
-    }
 
     return result;
 }
@@ -807,7 +816,10 @@ __exit:
 
     if (result < 0)
     {
-        at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);
+        if (sock != RT_NULL)
+        {
+            at_do_event_changes(sock, AT_EVENT_ERROR, RT_TRUE);   
+        }
     }
     else
     {

components/utilities/ulog/backend/console_be.c

@@ -45,12 +45,13 @@ void ulog_console_backend_output(struct ulog_backend *backend, rt_uint32_t level
 
 int ulog_console_backend_init(void)
 {
+    ulog_init();
     console.output = ulog_console_backend_output;
 
     ulog_backend_register(&console, "console", RT_TRUE);
 
     return 0;
 }
-INIT_COMPONENT_EXPORT(ulog_console_backend_init);
+INIT_PREV_EXPORT(ulog_console_backend_init);
 
 #endif /* ULOG_BACKEND_USING_CONSOLE */

components/utilities/ulog/ulog.c

@@ -149,7 +149,7 @@ size_t ulog_strcpy(size_t cur_len, char *dst, const char *src)
     while (*src != 0)
     {
         /* make sure destination has enough space */
-        if (cur_len++ <= ULOG_LINE_BUF_SIZE)
+        if (cur_len++ < ULOG_LINE_BUF_SIZE)
         {
             *dst++ = *src++;
         }