From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50808) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sd15h-00060r-Uo for qemu-devel@nongnu.org; Fri, 08 Jun 2012 11:27:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Sd15b-0003j2-T2 for qemu-devel@nongnu.org; Fri, 08 Jun 2012 11:27:09 -0400 Received: from cpe-174-097-227-101.nc.res.rr.com ([174.97.227.101]:54159 helo=localhost.localdomain) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sd15b-0003in-Mn for qemu-devel@nongnu.org; Fri, 08 Jun 2012 11:27:03 -0400 From: Corey Bryant Date: Fri, 8 Jun 2012 10:49:35 -0400 Message-Id: <1339166976-26236-4-git-send-email-coreyb@linux.vnet.ibm.com> In-Reply-To: <1339166976-26236-1-git-send-email-coreyb@linux.vnet.ibm.com> References: <1339166976-26236-1-git-send-email-coreyb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 3/4] osdep: Enable qemu_open to dup pre-opened fd List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, aliguori@us.ibm.com, stefanha@linux.vnet.ibm.com, libvir-list@redhat.com, Corey Bryant , eblake@redhat.com This patch adds support to qemu_open to dup(X) a pre-opened file descriptor if the filename is of the format /dev/fd/X. This can be used when QEMU is restricted from opening files, and the management application opens files on QEMU's behalf. v2: -Get rid of file_open and move dup code to qemu_open (kwolf@redhat.com) -Use strtol wrapper instead of atoi (kwolf@redhat.com) Signed-off-by: Corey Bryant --- osdep.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/osdep.c b/osdep.c index 3e6bada..c17cdcb 100644 --- a/osdep.c +++ b/osdep.c @@ -82,6 +82,19 @@ int qemu_open(const char *name, int flags, ...) int ret; int mode = 0; +#ifndef _WIN32 + const char *p; + + /* Attempt dup of fd for pre-opened file */ + if (strstart(name, "/dev/fd/", &p)) { + ret = qemu_parse_fd(p); + if (ret == -1) { + return -1; + } + return dup(ret); + } +#endif + if (flags & O_CREAT) { va_list ap; -- 1.7.10.2