diff options
Diffstat (limited to 'src/stdio/setvbuf.c')
| -rw-r--r-- | src/stdio/setvbuf.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c index e5800288..ecf038fd 100644 --- a/src/stdio/setvbuf.c +++ b/src/stdio/setvbuf.c @@ -16,11 +16,19 @@ int setvbuf(FILE *stream, char *buf, int mode, size_t size) stream->buffering = mode; stream->bsize = size; + if (mode == _IONBF) { + /* maybe free buffer */ + return 0; + } + if (buf != NULL) { stream->buf = buf; stream->buftype = SUPPLIED; - } else if (mode != _IONBF) { - stream->buf = calloc(size, sizeof(char)); + } else if (size <= BUFSIZ) { + stream->buf = stream->ibuf; + stream->buftype = INTERNAL; + } else { + stream->buf = malloc(size); stream->buftype = ALLOCED; } |