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cp: fix the buffer size used when writing zeros
author
Pádraig Brady
<P@draigBrady.com>
Mon, 31 Jan 2011 22:04:35 +0000
(22:04 +0000)
committer
Pádraig Brady
<P@draigBrady.com>
Mon, 31 Jan 2011 23:21:04 +0000
(23:21 +0000)
* src/copy.c (write_zeros): This bug caused 4 or 8 bytes to
be written at a time which is very inefficient. One could
trigger the issue with `cp --sparse=never sparse non-sparse`
on a file system that supports fiemap.
src/copy.c
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diff --git
a/src/copy.c
b/src/copy.c
index
04c678d
..
f429c00
100644
(file)
--- a/
src/copy.c
+++ b/
src/copy.c
@@
-291,7
+291,7
@@
write_zeros (int fd, uint64_t n_bytes)
while (n_bytes)
{
- uint64_t n = MIN (
sizeof
nz, n_bytes);
+ uint64_t n = MIN (nz, n_bytes);
if ((full_write (fd, zeros, n)) != n)
return false;
n_bytes -= n;