diff options
Diffstat (limited to 'libc/stdio/fwrite.c')
| -rw-r--r-- | libc/stdio/fwrite.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libc/stdio/fwrite.c b/libc/stdio/fwrite.c index 8a508dcdb..a97313ead 100644 --- a/libc/stdio/fwrite.c +++ b/libc/stdio/fwrite.c @@ -45,6 +45,7 @@ fwrite(const void *buf, size_t size, size_t count, FILE *fp) size_t n; struct __suio uio; struct __siov iov; + int ret; iov.iov_base = (void *)buf; uio.uio_resid = iov.iov_len = n = count * size; @@ -56,7 +57,10 @@ fwrite(const void *buf, size_t size, size_t count, FILE *fp) * skip the divide if this happens, since divides are * generally slow and since this occurs whenever size==0. */ - if (__sfvwrite(fp, &uio) == 0) + FLOCKFILE(fp); + ret = __sfvwrite(fp, &uio); + FUNLOCKFILE(fp); + if (ret == 0) return (count); return ((n - uio.uio_resid) / size); } |