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chardev: add error reporting for qemu_chr_new_from_opts

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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-10-15 09:28:05 +02:00
parent 249d41720b
commit bd2d80b2b7
3 changed files with 23 additions and 13 deletions
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3
include/char/char.h
View File

@ -89,7 +89,8 @@ struct CharDriverState {
* Returns: a new character backend
*/
CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s));
void (*init)(struct CharDriverState *s),
Error **errp);
/**
* @qemu_chr_new:

24
qemu-char.c
View File

@ -2779,19 +2779,20 @@ static const struct {
};
CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s))
void (*init)(struct CharDriverState *s),
Error **errp)
{
CharDriverState *chr;
int i;
if (qemu_opts_id(opts) == NULL) {
fprintf(stderr, "chardev: no id specified\n");
error_setg(errp, "chardev: no id specified\n");
return NULL;
}
if (qemu_opt_get(opts, "backend") == NULL) {
fprintf(stderr, "chardev: \"%s\" missing backend\n",
qemu_opts_id(opts));
error_setg(errp, "chardev: \"%s\" missing backend\n",
qemu_opts_id(opts));
return NULL;
}
for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
@ -2799,15 +2800,15 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
break;
}
if (i == ARRAY_SIZE(backend_table)) {
fprintf(stderr, "chardev: backend \"%s\" not found\n",
qemu_opt_get(opts, "backend"));
error_setg(errp, "chardev: backend \"%s\" not found\n",
qemu_opt_get(opts, "backend"));
return NULL;
}
chr = backend_table[i].open(opts);
if (!chr) {
fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
qemu_opt_get(opts, "backend"));
error_setg(errp, "chardev: opening backend \"%s\" failed\n",
qemu_opt_get(opts, "backend"));
return NULL;
}
@ -2837,6 +2838,7 @@ CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*in
const char *p;
CharDriverState *chr;
QemuOpts *opts;
Error *err = NULL;
if (strstart(filename, "chardev:", &p)) {
return qemu_chr_find(p);
@ -2846,7 +2848,11 @@ CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*in
if (!opts)
return NULL;
chr = qemu_chr_new_from_opts(opts, init);
chr = qemu_chr_new_from_opts(opts, init, &err);
if (error_is_set(&err)) {
fprintf(stderr, "%s\n", error_get_pretty(err));
error_free(err);
}
if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
monitor_init(chr, MONITOR_USE_READLINE);
}

9
vl.c
View File

@ -2238,11 +2238,14 @@ static int device_init_func(QemuOpts *opts, void *opaque)
static int chardev_init_func(QemuOpts *opts, void *opaque)
{
CharDriverState *chr;
Error *local_err = NULL;
chr = qemu_chr_new_from_opts(opts, NULL);
if (!chr)
qemu_chr_new_from_opts(opts, NULL, &local_err);
if (error_is_set(&local_err)) {
fprintf(stderr, "%s\n", error_get_pretty(local_err));
error_free(local_err);
return -1;
}
return 0;
}