From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52158) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNYeT-0006lC-VT for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:16:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YNYeO-0004nx-55 for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:16:45 -0500 Received: from e35.co.us.ibm.com ([32.97.110.153]:56151) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YNYeN-0004kz-Fc for qemu-devel@nongnu.org; Mon, 16 Feb 2015 22:16:39 -0500 Received: from /spool/local by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 16 Feb 2015 20:16:39 -0700 Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 94FCF1FF0040 for ; Mon, 16 Feb 2015 20:07:48 -0700 (MST) Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t1H3GTIH19136670 for ; Mon, 16 Feb 2015 20:16:37 -0700 Received: from d03av01.boulder.ibm.com (localhost [127.0.0.1]) by d03av01.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t1H3G3vO030082 for ; Mon, 16 Feb 2015 20:16:04 -0700 From: Michael Roth Date: Mon, 16 Feb 2015 21:14:45 -0600 Message-Id: <1424142892-7275-4-git-send-email-mdroth@linux.vnet.ibm.com> In-Reply-To: <1424142892-7275-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1424142892-7275-1-git-send-email-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH 03/10] guest agent: guest-file-open: refactoring List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, Simon Zolin , "Denis V. Lunev" From: Simon Zolin Moved the code that sets non-blocking flag on fd into a separate function. Signed-off-by: Simon Zolin Reviewed-by: Roman Kagan Signed-off-by: Denis V. Lunev CC: Michael Roth CC: Eric Blake Signed-off-by: Michael Roth --- qga/commands-posix.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 57409d0..ed527a3 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -376,13 +376,33 @@ safe_open_or_create(const char *path, const char *mode, Error **errp) return NULL; } +static int guest_file_toggle_flags(int fd, int flags, bool set, Error **err) +{ + int ret, old_flags; + + old_flags = fcntl(fd, F_GETFL); + if (old_flags == -1) { + error_set_errno(err, errno, QERR_QGA_COMMAND_FAILED, + "failed to fetch filehandle flags"); + return -1; + } + + ret = fcntl(fd, F_SETFL, set ? (old_flags | flags) : (old_flags & ~flags)); + if (ret == -1) { + error_set_errno(err, errno, QERR_QGA_COMMAND_FAILED, + "failed to set filehandle flags"); + return -1; + } + + return ret; +} + int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **errp) { FILE *fh; Error *local_err = NULL; - int fd; - int64_t ret = -1, handle; + int64_t handle; if (!has_mode) { mode = "r"; @@ -397,12 +417,7 @@ int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, /* set fd non-blocking to avoid common use cases (like reading from a * named pipe) from hanging the agent */ - fd = fileno(fh); - ret = fcntl(fd, F_GETFL); - ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK); - if (ret == -1) { - error_setg_errno(errp, errno, "failed to make file '%s' non-blocking", - path); + if (guest_file_toggle_flags(fileno(fh), O_NONBLOCK, true, errp) < 0) { fclose(fh); return -1; } -- 1.9.1