[libc][unistd.h] define F_OK

1 files changed, 5 insertions, 0 deletions

diff --git a/components/libc/compilers/common/include/sys/unistd.h b/components/libc/compilers/common/include/sys/unistd.h
index 0eaf52423c..b9c64f3bb6 100644
--- a/components/libc/compilers/common/include/sys/unistd.h
+++ b/components/libc/compilers/common/include/sys/unistd.h
@@ -23,6 +23,11 @@ extern "C" {
 #define STDOUT_FILENO   1       /* standard output file descriptor */
 #define STDERR_FILENO   2       /* standard error file descriptor */
 
+#define F_OK 0
+#define X_OK 1
+#define W_OK 2
+#define R_OK 4
+
 unsigned alarm(unsigned __secs);
 ssize_t read(int fd, void *buf, size_t len);
 ssize_t write(int fd, const void *buf, size_t len);