diff options
Diffstat (limited to 'src/stdio/fflush.c')
| -rw-r--r-- | src/stdio/fflush.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/stdio/fflush.c b/src/stdio/fflush.c index e13f8979..cb5f49c6 100644 --- a/src/stdio/fflush.c +++ b/src/stdio/fflush.c @@ -27,6 +27,14 @@ int fflush(FILE *stream) return 0; } + if (!stream->write) { + UNDEFINED("attempt to fflush() an input stream"); + } + + if (stream->read && stream->operation == OP_INPUT) { + UNDEFINED("attempt to fflush() an update stream after input"); + } + if (stream->bpos == 0) { return 0; } |