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Message-Id: <20190312203122.64157-1-AWilcox@Wilcox-Tech.com>
Date: Tue, 12 Mar 2019 15:31:22 -0500
From: "A. Wilcox" <AWilcox@...cox-Tech.com>
To: musl@...ts.openwall.com
Cc: "A. Wilcox" <AWilcox@...cox-Tech.com>
Subject: [PATCH] setvbuf: return failure if mode is invalid
POSIX requires setvbuf to return non-zero if `mode` is not one of _IONBF,
_IOLBF, or _IOFBF.
---
src/stdio/setvbuf.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c
index 06ea296c..523dddc8 100644
--- a/src/stdio/setvbuf.c
+++ b/src/stdio/setvbuf.c
@@ -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 + UNGET);
f->buf_size = size - UNGET;
}
if (type == _IOLBF && f->buf_size)
f->lbf = '\n';
+ } else {
+ return -1;
}
f->flags |= F_SVB;
--
2.19.2
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