fdopen: Check for malloc errors

libs/libc/src/file.cpp

@@ -30,14 +30,11 @@ extern "C"
         return 0; // FIXME: Implement buffered IO.
     }
 
-    FILE* fopen(const char* pathname, const char*)
+    FILE* fopen(const char* pathname, const char* mode)
     {
         int fd = open(pathname, O_RDWR); // FIXME: Use the mode string.
         if (fd < 0) { return 0; }
-        FILE* stream = (FILE*)malloc(sizeof(FILE));
-        stream->f_fd = fd;
-        clearerr(stream);
-        return stream;
+        return fdopen(fd, mode);
     }
 
     FILE* fdopen(int fd, const char*)
@@ -48,6 +45,7 @@ extern "C"
             return 0;
         }
         FILE* stream = (FILE*)malloc(sizeof(FILE));
+        if (!stream) { return 0; }
         stream->f_fd = fd;
         clearerr(stream);
         return stream;