libc: Add creat()

libc/include/fcntl.h

@@ -13,6 +13,9 @@ extern "C"
     /* Open a file path and return a file descriptor to it. */
     int open(const char* path, int flags, ...);
 
+    /* Create a file and return a file descriptor to it. */
+    int creat(const char* path, mode_t mode);
+
 #ifdef __cplusplus
 }
 #endif

libc/src/fcntl.cpp

@@ -18,4 +18,9 @@ extern "C"
         va_end(ap);
         __errno_return(rc, int);
     }
+
+    int creat(const char* path, mode_t mode)
+    {
+        return open(path, O_WRONLY | O_CREAT | O_TRUNC, mode);
+    }
 }