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authorFilipe Cabecinhas <filcab@gmail.com>2013-05-10 15:24:57 -0700
committerJunio C Hamano <gitster@pobox.com>2013-05-17 12:16:30 -0700
commit6c642a878688adf46b226903858b53e2d31ac5c3 (patch)
tree8fc188945aa2789a37089c4322c99bacbe4ccaca /compat/clipped-write.c
parent239222f587ed06f96d90dd71c66d80a2b1e3dc9f (diff)
downloadgit-6c642a878688adf46b226903858b53e2d31ac5c3.tar.gz
compate/clipped-write.c: large write(2) fails on Mac OS X/XNU
Due to a bug in the Darwin kernel, write(2) calls have a maximum size of INT_MAX bytes. Introduce a new compat function, clipped_write(), that only writes at most INT_MAX bytes and returns the number of bytes written, as a substitute for write(2), and allow platforms that need this to enable it from the build mechanism with NEEDS_CLIPPED_WRITE. Set it for Mac OS X by default. It may be necessary to include this function on Windows, too. Signed-off-by: Filipe Cabecinhas <filcab+git@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'compat/clipped-write.c')
-rw-r--r--compat/clipped-write.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/compat/clipped-write.c b/compat/clipped-write.c
new file mode 100644
index 0000000000..b8f98ff77f
--- /dev/null
+++ b/compat/clipped-write.c
@@ -0,0 +1,13 @@
+#include "../git-compat-util.h"
+#undef write
+
+/*
+ * Version of write that will write at most INT_MAX bytes.
+ * Workaround a xnu bug on Mac OS X
+ */
+ssize_t clipped_write(int fildes, const void *buf, size_t nbyte)
+{
+ if (nbyte > INT_MAX)
+ nbyte = INT_MAX;
+ return write(fildes, buf, nbyte);
+}