musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2023年03月22日 12:56:46 -0400
committer	Rich Felker <dalias@aerifal.cx>	2023年03月22日 12:56:46 -0400
commit	1d5750b95c06913a1f18a995481276d698d20fae (patch)
tree	a64fe442a196ad0d6cfa6c61d330b85507361f90 /src/stdio/vswprintf.c
parent	0e5234807dcdc76c43f9313c6ba9e2b7da408d8c (diff)
download	musl-1d5750b95c06913a1f18a995481276d698d20fae.tar.gz

fix swprintf handling of nul character in output

the buffer-flush function did not account for mbtowc returning 0 rather than 1 when converting the nul character. this prevented advancing past it, instead repeatedly converting it into the output wide character string until the max output length was exhausted.

Diffstat (limited to 'src/stdio/vswprintf.c')

-rw-r--r--

src/stdio/vswprintf.c

1 files changed, 1 insertions, 0 deletions

diff --git a/src/stdio/vswprintf.c b/src/stdio/vswprintf.c
index 7f98c5c9..fc223cf2 100644
--- a/src/stdio/vswprintf.c
+++ b/src/stdio/vswprintf.c

@@ -18,6 +18,7 @@ static size_t sw_write(FILE *f, const unsigned char *s, size_t l)

if (s!=f->wbase && sw_write(f, f->wbase, f->wpos-f->wbase)==-1)

return -1;

while (c->l && l && (i=mbtowc(c->ws, (void *)s, l))>=0) {

+ if (!i) i=1;

s+=i;

l-=i;

c->l--;

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