diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/writev.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/writev.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/writev.c b/sysdeps/unix/sysv/linux/writev.c index 11afd81d2e..d147186b51 100644 --- a/sysdeps/unix/sysv/linux/writev.c +++ b/sysdeps/unix/sysv/linux/writev.c @@ -25,15 +25,12 @@ extern ssize_t __syscall_writev __P ((int, const struct iovec *, int)); /* Not all versions of the kernel support the large number of records. */ -#undef MAX_IOVEC -#ifdef UIO_FASTIOV -# define MAX_IOVEC UIO_FASTIOV -#else -# define MAX_IOVEC 8 /* 8 is a safe number. */ +#ifndef UIO_FASTIOV +# define UIO_FASTIOV 8 /* 8 is a safe number. */ #endif -/* We should deal with kernel which have a smaller UIO_MAXIOV as well +/* We should deal with kernel which have a smaller UIO_FASTIOV as well as a very big count. */ ssize_t writev (fd, vector, count) @@ -46,7 +43,7 @@ writev (fd, vector, count) bytes_written = __syscall_writev (fd, vector, count); - if (bytes_written < 0 && errno == EINVAL && count > MAX_IOVEC) + if (bytes_written < 0 && errno == EINVAL && count > UIO_FASTIOV) { int i; @@ -54,10 +51,10 @@ writev (fd, vector, count) __set_errno (errno_saved); bytes_written = 0; - for (i = 0; i < count; i += MAX_IOVEC) + for (i = 0; i < count; i += UIO_FASTIOV) { ssize_t bytes = __syscall_writev (fd, vector + i, - MIN (count - i, MAX_IOVEC)); + MIN (count - i, UIO_FASTIOV)); if (bytes < 0) return bytes_written > 0 ? bytes_written : bytes; |