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| author | Casey Connolly <kcxt@postmarketos.org> | 2025-04-23 15:06:48 +0200 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2025-05-27 10:06:37 -0400 |
| commit | fde29c04adbab9d5b081bf6717b5458188647f1c (patch) | |
| tree | 67fd485b6e06c030e703097ce000fb50fd79b69e | |
| parent | ae3a8c93a663b553e65f096498937083dad210d2 (diff) | |
| download | musl-fde29c04adbab9d5b081bf6717b5458188647f1c.tar.gz | |
stdio: skip empty iovec when buffering is disabled
When buffering on a FILE is disabled we still send both iovecs, even
though the first one is always empty. Clean things up by skipping the
empty iovec instead.
| -rw-r--r-- | src/stdio/__stdio_write.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/stdio/__stdio_write.c b/src/stdio/__stdio_write.c index d2d89475..5356553d 100644 --- a/src/stdio/__stdio_write.c +++ b/src/stdio/__stdio_write.c @@ -11,6 +11,11 @@ size_t __stdio_write(FILE *f, const unsigned char *buf, size_t len) size_t rem = iov[0].iov_len + iov[1].iov_len; int iovcnt = 2; ssize_t cnt; + + if (!iov->iov_len) { + iov++; + iovcnt--; + } for (;;) { cnt = syscall(SYS_writev, f->fd, iov, iovcnt); if (cnt == rem) { |