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authorStefan Grundmann <[email protected]>2015-04-23 17:40:51 +0000
committerStefan Grundmann <[email protected]>2015-04-23 18:32:40 +0000
commitdaaefc2fa63eb0c3fc8f6183ec1169733c2f2ea8 (patch)
tree2fb40823724e3ab5f0c8c111c05b2e00c7b63fd7 /erts/emulator/drivers
parent1756ef6ea4af36e061cdde92d1a87b3b225edea7 (diff)
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Fix FreeBSD sendfile
check (nbytes == 0 && d->c.sendfile.nbytes == 0) when efile_sendfile returns 0 and has EAGAIN set. FreeBSD sendfile(2) man page: When using a socket marked for non-blocking I/O, sendfile() may send fewer bytes than requested. In this case, the number of bytes successfully written is returned in *sbytes (if specified), and the error EAGAIN is returned. The number of bytes successfully written can be 0. If this happens and in a request handling either file:sendfile/2 or file:sendfile/5 with Bytes=0, the sendfile loop will stop prematurely and file:sendfile will return {ok, BytesSent} where BytesSent < DataAfterOffset, effectively breaking sendfile support on FreeBSD.
Diffstat (limited to 'erts/emulator/drivers')
-rw-r--r--erts/emulator/drivers/common/efile_drv.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index 518646649d..b2cfe70f94 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -1938,6 +1938,8 @@ static void invoke_sendfile(void *data)
d->result_ok = 1;
if (d->c.sendfile.nbytes != 0)
d->c.sendfile.nbytes -= nbytes;
+ } else if (nbytes == 0 && d->c.sendfile.nbytes == 0) {
+ d->result_ok = 1;
} else
d->result_ok = 0;
} else {