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[Qemu-devel] [RFC v2 1/7] qemu-option: qemu_opt_set_bool(): fix code dup
From: |
Dong Xu Wang |
Subject: |
[Qemu-devel] [RFC v2 1/7] qemu-option: qemu_opt_set_bool(): fix code duplication |
Date: |
Thu, 27 Sep 2012 13:14:19 +0800 |
Call qemu_opt_set() instead of duplicating opt_set().
It will set opt->str in qemu_opt_set_bool, without opt->str, there
will be some potential bugs.
These are uses of opt->str, and what happens when it isn't set:
* qemu_opt_get(): returns NULL, which means "not set". Bug can bite
when value isn't the default value.
* qemu_opt_parse(): passes NULL to parse_option_bool(), which treats it
like "on". Wrong if the value is actually false. Bug can bite when
qemu_opts_validate() runs after qemu_opt_set_bool().
* qemu_opt_del(): passes NULL to g_free(), which is just fine.
* qemu_opt_foreach(): passes NULL to the callback, which is unlikely to
be prepared for it.
* qemu_opts_print(): prints NULL, which crashes on some systems.
* qemu_opts_to_qdict(): passes NULL to qstring_from_str(), which
crashes.
Signed-off-by: Luiz Capitulino <address@hidden>
Signed-off-by: Dong Xu Wang <address@hidden>
---
qemu-option.c | 28 +---------------------------
1 files changed, 1 insertions(+), 27 deletions(-)
diff --git a/qemu-option.c b/qemu-option.c
index 27891e7..0b81e77 100644
--- a/qemu-option.c
+++ b/qemu-option.c
@@ -667,33 +667,7 @@ void qemu_opt_set_err(QemuOpts *opts, const char *name,
const char *value,
int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val)
{
- QemuOpt *opt;
- const QemuOptDesc *desc = opts->list->desc;
- int i;
-
- for (i = 0; desc[i].name != NULL; i++) {
- if (strcmp(desc[i].name, name) == 0) {
- break;
- }
- }
- if (desc[i].name == NULL) {
- if (i == 0) {
- /* empty list -> allow any */;
- } else {
- qerror_report(QERR_INVALID_PARAMETER, name);
- return -1;
- }
- }
-
- opt = g_malloc0(sizeof(*opt));
- opt->name = g_strdup(name);
- opt->opts = opts;
- QTAILQ_INSERT_TAIL(&opts->head, opt, next);
- if (desc[i].name != NULL) {
- opt->desc = desc+i;
- }
- opt->value.boolean = !!val;
- return 0;
+ return qemu_opt_set(opts, name, val ? "on" : "off");
}
int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
--
1.7.1
- [Qemu-devel] [RFC v2 0/7] replace QEMUOptionParameter with QemuOpts parser, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 1/7] qemu-option: qemu_opt_set_bool(): fix code duplication,
Dong Xu Wang <=
- [Qemu-devel] [RFC v2 2/7] qemu-option: opt_set(): split it up into more functions, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 3/7] qemu-option: qemu_opts_validate(): fix duplicated code, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 4/7] introduce qemu_opts_create_nofail function, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 5/7] use qemu_opts_create_nofail, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 6/7] create new function: qemu_opt_set_number, Dong Xu Wang, 2012/09/27
- [Qemu-devel] [RFC v2 7/7] remove QEMUOptionParameter, Dong Xu Wang, 2012/09/27