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authorA. Wilcox <AWilcox@Wilcox-Tech.com>2019-03-12 15:31:22 -0500
committerRich Felker <dalias@aerifal.cx>2019-03-12 16:44:41 -0400
commit00d3d577cac8dc05e683b16bfe3dbe4a692cb172 (patch)
treeb57a62996a5ac8d994f0d04feca2f993c77aa047 /src
parentf368d9fd26ae002fe2fce20add4cb2b806f48972 (diff)
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setvbuf: return failure if mode is invalid
POSIX requires setvbuf to return non-zero if `mode` is not one of _IONBF, _IOLBF, or _IOFBF.
Diffstat (limited to 'src')
-rw-r--r--src/stdio/setvbuf.c4
1 files changed, 3 insertions, 1 deletions
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;