diff options
| -rw-r--r-- | lib/libc_r/uthread/uthread_writev.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/lib/libc_r/uthread/uthread_writev.c b/lib/libc_r/uthread/uthread_writev.c index b07278a..77046d5 100644 --- a/lib/libc_r/uthread/uthread_writev.c +++ b/lib/libc_r/uthread/uthread_writev.c @@ -174,20 +174,35 @@ _writev(int fd, const struct iovec * iov, int iovcnt) * interrupted by a signal */ if (curthread->interrupted) { - /* Return an error: */ - ret = -1; + if (num > 0) { + /* Return partial success: */ + ret = num; + } else { + /* Return an error: */ + errno = EINTR; + ret = -1; + } } /* - * If performing a non-blocking write or if an - * error occurred, just return whatever the write - * syscall did: + * If performing a non-blocking write, + * just return whatever the write syscall did: */ - } else if (!blocking || n < 0) { + } else if (!blocking) { /* A non-blocking call might return zero: */ ret = n; break; + /* + * If there was an error, return partial success + * (if any bytes were written) or else the error: + */ + } else if (n < 0) { + if (num > 0) + ret = num; + else + ret = n; + /* Check if the write has completed: */ } else if (idx == iovcnt) /* Return the number of bytes written: */ |
