From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58107) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a4k4R-00040j-NV for qemu-devel@nongnu.org; Fri, 04 Dec 2015 01:42:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a4k4O-0004bZ-I1 for qemu-devel@nongnu.org; Fri, 04 Dec 2015 01:42:19 -0500 Received: from mailhub.sw.ru ([195.214.232.25]:20727 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a4k4O-0004a3-4Q for qemu-devel@nongnu.org; Fri, 04 Dec 2015 01:42:16 -0500 From: "Denis V. Lunev" Date: Fri, 4 Dec 2015 09:42:04 +0300 Message-Id: <1449211324-17856-1-git-send-email-den@openvz.org> Subject: [Qemu-devel] [PATCH for 2.6 v3 1/1] qemu-char: append opt to stop truncation of serial file List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, Markus Armbruster , Olga Krishtal , "Denis V. Lunev" , Paolo Bonzini From: Olga Krishtal Our QA team wants to preserve serial output of the guest in between QEMU runs to perform post-analysis. By default this behavior is off (file is truncated each time QEMU is started or device is plugged). Signed-off-by: Olga Krishtal Signed-off-by: Denis V. Lunev CC: Eric Blake CC: Markus Armbruster CC: Paolo Bonzini --- Changes from v1: - s/parallels.com/virtuozzo.com/ :( Changes from v2: - fixed QAPI description - added has_append filling and checking qapi-schema.json | 5 ++++- qemu-char.c | 14 +++++++++++++- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/qapi-schema.json b/qapi-schema.json index 18c9a6c..89201a9 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -3020,11 +3020,14 @@ # # @in: #optional The name of the input file # @out: The name of the output file +# @append: #optional Open the file in append mode (default false to +# truncate) (Since 2.6) # # Since: 1.4 ## { 'struct': 'ChardevFile', 'data': { '*in' : 'str', - 'out' : 'str' } } + 'out' : 'str', + '*append': 'bool' } } ## # @ChardevHostdev: diff --git a/qemu-char.c b/qemu-char.c index 2969c44..66703e3 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -3484,6 +3484,9 @@ static void qemu_chr_parse_file_out(QemuOpts *opts, ChardevBackend *backend, } backend->u.file = g_new0(ChardevFile, 1); backend->u.file->out = g_strdup(path); + + backend->u.file->has_append = true; + backend->u.file->append = qemu_opt_get_bool(opts, "append", false); } static void qemu_chr_parse_stdio(QemuOpts *opts, ChardevBackend *backend, @@ -4041,6 +4044,9 @@ QemuOptsList qemu_chardev_opts = { },{ .name = "chardev", .type = QEMU_OPT_STRING, + },{ + .name = "append", + .type = QEMU_OPT_BOOL, }, { /* end of list */ } }, @@ -4101,7 +4107,13 @@ static CharDriverState *qmp_chardev_open_file(const char *id, ChardevFile *file = backend->u.file; int flags, in = -1, out; - flags = O_WRONLY | O_TRUNC | O_CREAT | O_BINARY; + flags = O_WRONLY | O_CREAT | O_BINARY; + if (file->has_append && file->append) { + flags |= O_APPEND; + } else { + flags |= O_TRUNC; + } + out = qmp_chardev_open_file_source(file->out, flags, errp); if (out < 0) { return NULL; -- 2.5.0