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-rw-r--r--components/libc/compilers/armlibc/sys/unistd.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/components/libc/compilers/armlibc/sys/unistd.h b/components/libc/compilers/armlibc/sys/unistd.h
index 38ba8b5072..56979955ba 100644
--- a/components/libc/compilers/armlibc/sys/unistd.h
+++ b/components/libc/compilers/armlibc/sys/unistd.h
@@ -4,6 +4,11 @@
#include <rtthread.h>
#ifdef RT_USING_DFS
+
+#define STDIN_FILENO 0 /* standard input file descriptor */
+#define STDOUT_FILENO 1 /* standard output file descriptor */
+#define STDERR_FILENO 2 /* standard error file descriptor */
+
#include <dfs_posix.h>
#else
#define _FREAD 0x0001 /* read enabled */