From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51460) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UosI5-000720-Bi for qemu-devel@nongnu.org; Tue, 18 Jun 2013 05:33:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UosI4-00029p-0G for qemu-devel@nongnu.org; Tue, 18 Jun 2013 05:33:29 -0400 Received: from mail-ie0-x234.google.com ([2607:f8b0:4001:c03::234]:56864) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UosI3-00029h-S8 for qemu-devel@nongnu.org; Tue, 18 Jun 2013 05:33:27 -0400 Received: by mail-ie0-f180.google.com with SMTP id f4so9567319iea.11 for ; Tue, 18 Jun 2013 02:33:27 -0700 (PDT) Sender: Dong Xu Wang From: Dong Xu Wang Date: Tue, 18 Jun 2013 17:31:53 +0800 Message-Id: <1371547919-15654-2-git-send-email-wdongxu@linux.vnet.ibm.com> In-Reply-To: <1371547919-15654-1-git-send-email-wdongxu@linux.vnet.ibm.com> References: <1371547919-15654-1-git-send-email-wdongxu@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH V16 1/7] add def_value_str in QemuOptDesc struct and rewrite qemu_opts_print List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, Dong Xu Wang , wdongxu@cn.ibm.com, armbru@redhat.com, stefanha@redhat.com qemu_opts_print has no user now, so can re-write the function safely. qemu_opts_print is used while using "qemu-img create", it produces the same output as previous code. The behavior of this function has changed: 1. Print every possible option, whether a value has been set or not. 2. Option descriptors may provide a default value. 3. Print to stdout instead of stderr. Previously the behavior was to print every option that has been set. Options that have not been set would be skipped. Signed-off-by: Dong Xu Wang Reviewed-by: Eric Blake --- v13->v14: 1) fix memory leak. 2) make opt_set do not accpet null value argument. v12->v13 1) re-write commit message. v11->v12 1) make def_value_str become the real default value string in opt_set function. v10->v11: 1) print all values that have actually been assigned while accept-any cases. v7->v8: 1) print "elements => accept any params" while opts_accepts_any() == true. 2) since def_print_str is the default value if an option isn't set, so rename it to def_value_str. include/qemu/option.h | 3 ++- util/qemu-option.c | 32 ++++++++++++++++++++++++++------ 2 files changed, 28 insertions(+), 7 deletions(-) diff --git a/include/qemu/option.h b/include/qemu/option.h index bdb6d21..b928ab0 100644 --- a/include/qemu/option.h +++ b/include/qemu/option.h @@ -96,6 +96,7 @@ typedef struct QemuOptDesc { const char *name; enum QemuOptType type; const char *help; + const char *def_value_str; } QemuOptDesc; struct QemuOptsList { @@ -152,7 +153,7 @@ QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict); void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp); typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque); -int qemu_opts_print(QemuOpts *opts, void *dummy); +int qemu_opts_print(QemuOpts *opts); int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, int abort_on_failure); diff --git a/util/qemu-option.c b/util/qemu-option.c index 8b74bf1..84d8c8b 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -860,16 +860,36 @@ void qemu_opts_del(QemuOpts *opts) g_free(opts); } -int qemu_opts_print(QemuOpts *opts, void *dummy) +int qemu_opts_print(QemuOpts *opts) { QemuOpt *opt; + QemuOptDesc *desc = opts->list->desc; - fprintf(stderr, "%s: %s:", opts->list->name, - opts->id ? opts->id : ""); - QTAILQ_FOREACH(opt, &opts->head, next) { - fprintf(stderr, " %s=\"%s\"", opt->name, opt->str); + if (desc[0].name == NULL) { + QTAILQ_FOREACH(opt, &opts->head, next) { + printf("%s=\"%s\" ", opt->name, opt->str); + } + return 0; + } + for (; desc && desc->name; desc++) { + const char *value = desc->def_value_str; + QemuOpt *opt; + + opt = qemu_opt_find(opts, desc->name); + if (opt) { + value = opt->str; + } + + if (!value) { + continue; + } + + if (desc->type == QEMU_OPT_STRING) { + printf("%s='%s' ", desc->name, value); + } else { + printf("%s=%s ", desc->name, value); + } } - fprintf(stderr, "\n"); return 0; } -- 1.7.11.7