X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Fsetvbuf.c;h=523dddc8ba28f53a7b3fcc4e3e5323de092acc22;hb=9b132e556774c744f9052581d2d8d0fab417e97c;hp=0a0c139ff820e9fc7cc2d7a57dee0e9e14e4a7ab;hpb=0b80a7b0404b6e49b0b724e3e3fe0ed5af3b08ef;p=musl

diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c
index 0a0c139f..523dddc8 100644
--- a/src/stdio/setvbuf.c
+++ b/src/stdio/setvbuf.c
@@ -1,7 +1,7 @@
 #include "stdio_impl.h"
 
 /* The behavior of this function is undefined except when it is the first
- * operation on the stream, so the presence or absence of lockign is not
+ * operation on the stream, so the presence or absence of locking is not
  * observable in a program whose behavior is defined. Thus no locking is
  * performed here. No allocation of buffers is performed, but a buffer
  * provided by the caller is used as long as it is suitably sized. */
@@ -12,13 +12,15 @@ int setvbuf(FILE *restrict f, char *restrict buf, int type, size_t size)
 
 	if (type == _IONBF) {
 		f->buf_size = 0;
-	} else {
+	} else if (type == _IOLBF || type == _IOFBF) {
 		if (buf && size >= UNGET) {
-			f->buf = (void *)buf;
+			f->buf = (void *)(buf + UNGET);
 			f->buf_size = size - UNGET;
 		}
 		if (type == _IOLBF && f->buf_size)
 			f->lbf = '\n';
+	} else {
+		return -1;
 	}
 
 	f->flags |= F_SVB;