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opts: produce valid command line in qemu_opts_print

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This will let us print options in a format that the user would actually
write it on the command line (foo=bar,baz=asd,etc=def), without
prepending a spurious comma at the beginning of the list, or quoting
values unnecessarily.  This patch provides the following changes:
* write and id=, if the option has an id
* do not print separator before the first element
* do not quote string arguments
* properly escape commas (,) for QEMU

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Kővágó, Zoltán 2015-07-07 16:42:10 +02:00 • committed by Michael Tokarev
parent 71e0e067b2
commit fe646693ac
34 changed files with 123 additions and 100 deletions
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29
util/qemu-option.c
View file

@ -735,14 +735,35 @@ void qemu_opts_del(QemuOpts *opts)
g_free(opts);
}
void qemu_opts_print(QemuOpts *opts, const char *sep)
/* print value, escaping any commas in value */
static void escaped_print(const char *value)
{
const char *ptr;
for (ptr = value; *ptr; ++ptr) {
if (*ptr == ',') {
putchar(',');
}
putchar(*ptr);
}
}
void qemu_opts_print(QemuOpts *opts, const char *separator)
{
QemuOpt *opt;
QemuOptDesc *desc = opts->list->desc;
const char *sep = "";
if (opts->id) {
printf("id=%s", opts->id); /* passed id_wellformed -> no commas */
sep = separator;
}
if (desc[0].name == NULL) {
QTAILQ_FOREACH(opt, &opts->head, next) {
printf("%s%s=\"%s\"", sep, opt->name, opt->str);
printf("%s%s=", sep, opt->name);
escaped_print(opt->str);
sep = separator;
}
return;
}
@ -755,13 +776,15 @@ void qemu_opts_print(QemuOpts *opts, const char *sep)
continue;
}
if (desc->type == QEMU_OPT_STRING) {
printf("%s%s='%s'", sep, desc->name, value);
printf("%s%s=", sep, desc->name);
escaped_print(value);
} else if ((desc->type == QEMU_OPT_SIZE ||
desc->type == QEMU_OPT_NUMBER) && opt) {
printf("%s%s=%" PRId64, sep, desc->name, opt->value.uint);
} else {
printf("%s%s=%s", sep, desc->name, value);
}
sep = separator;
}
}