[libvirt] [PATCH] Fix iohelper usage with streams opened for read
From: "Daniel P. Berrange" <berrange@redhat.com> In b2878ed860ceceec3cd6481424fed0b543b687cd we added the O_NOCTTY flag when opening files in the stream code. Unfortunately a later piece of code was comparing the flags == O_RDONLY, without masking out the non-access mode flags. This broke the iohelper when used with streams for read, since it caused us to attach the stream output pipe to the stream input FD instead of output FD :-( Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- src/fdstream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/fdstream.c b/src/fdstream.c index 6f8ce53..a9a4851 100644 --- a/src/fdstream.c +++ b/src/fdstream.c @@ -641,7 +641,7 @@ virFDStreamOpenFileInternal(virStreamPtr st, virCommandTransferFD(cmd, fd); virCommandAddArgFormat(cmd, "%d", fd); - if (oflags == O_RDONLY) { + if ((oflags & O_ACCMODE) == O_RDONLY) { childfd = fds[1]; fd = fds[0]; virCommandSetOutputFD(cmd, &childfd); -- 1.8.2.1
On 10/05/13 21:51, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange@redhat.com>
In b2878ed860ceceec3cd6481424fed0b543b687cd we added the O_NOCTTY flag when opening files in the stream code. Unfortunately a later piece of code was comparing the flags == O_RDONLY, without masking out the non-access mode flags. This broke the iohelper when used with streams for read, since it caused us to attach the stream output pipe to the stream input FD instead of output FD :-(
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- src/fdstream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/fdstream.c b/src/fdstream.c index 6f8ce53..a9a4851 100644 --- a/src/fdstream.c +++ b/src/fdstream.c @@ -641,7 +641,7 @@ virFDStreamOpenFileInternal(virStreamPtr st, virCommandTransferFD(cmd, fd); virCommandAddArgFormat(cmd, "%d", fd);
- if (oflags == O_RDONLY) { + if ((oflags & O_ACCMODE) == O_RDONLY) { childfd = fds[1]; fd = fds[0]; virCommandSetOutputFD(cmd, &childfd);
ACK. I went a bit far away to find the cause.. :-(
On 10/05/13 22:07, Osier Yang wrote:
On 10/05/13 21:51, Daniel P. Berrange wrote:
From: "Daniel P. Berrange" <berrange@redhat.com>
In b2878ed860ceceec3cd6481424fed0b543b687cd we added the O_NOCTTY flag when opening files in the stream code. Unfortunately a later piece of code was comparing the flags == O_RDONLY, without masking out the non-access mode flags. This broke the iohelper when used with streams for read, since it caused us to attach the stream output pipe to the stream input FD instead of output FD :-(
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- src/fdstream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/fdstream.c b/src/fdstream.c index 6f8ce53..a9a4851 100644 --- a/src/fdstream.c +++ b/src/fdstream.c @@ -641,7 +641,7 @@ virFDStreamOpenFileInternal(virStreamPtr st, virCommandTransferFD(cmd, fd); virCommandAddArgFormat(cmd, "%d", fd); - if (oflags == O_RDONLY) { + if ((oflags & O_ACCMODE) == O_RDONLY) { childfd = fds[1]; fd = fds[0]; virCommandSetOutputFD(cmd, &childfd);
ACK. I went a bit far away to find the cause.. :-(
This patch should be pushed to maint branch as well, as it existed since v1.0.4.
participants (2)
-
Daniel P. Berrange -
Osier Yang