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spice-char: improve error reporting 

Set errp to report errors up to the right monitor.

Use error_append_hint() to give hints about parameters on !qmp monitors,
instead of a direct fprintf() call.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-11-30 17:55:20 +04:00 committed by Paolo Bonzini
parent 1876ed04dc
commit 096b4894e5
1 changed files with 10 additions and 20 deletions
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30
spice-qemu-char.c
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@ -2,6 +2,7 @@
#include "trace.h" #include "trace.h"
#include "ui/qemu-spice.h" #include "ui/qemu-spice.h"
#include "sysemu/char.h" #include "sysemu/char.h"
#include "qemu/error-report.h"
#include <spice.h> #include <spice.h>
#include <spice/protocol.h> #include <spice/protocol.h>
@ -239,23 +240,6 @@ static void spice_port_set_fe_open(struct Chardev *chr, int fe_open)
#endif #endif
} }
static void print_allowed_subtypes(void)
{
const char** psubtype;
int i;
fprintf(stderr, "allowed names: ");
for(i=0, psubtype = spice_server_char_device_recognized_subtypes();
*psubtype != NULL; ++psubtype, ++i) {
if (i == 0) {
fprintf(stderr, "%s", *psubtype);
} else {
fprintf(stderr, ", %s", *psubtype);
}
}
fprintf(stderr, "\n");
}
static void spice_chr_accept_input(struct Chardev *chr) static void spice_chr_accept_input(struct Chardev *chr)
{ {
SpiceChardev *s = (SpiceChardev *)chr; SpiceChardev *s = (SpiceChardev *)chr;
@ -302,8 +286,14 @@ static Chardev *qemu_chr_open_spice_vmc(const CharDriver *driver,
} }
} }
if (*psubtype == NULL) { if (*psubtype == NULL) {
fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type); char *subtypes = g_strjoinv(", ",
print_allowed_subtypes(); (gchar **)spice_server_char_device_recognized_subtypes());
error_setg(errp, "unsupported type name: %s", type);
error_append_hint(errp, "allowed spice char type names: %s\n",
subtypes);
g_free(subtypes);
return NULL; return NULL;
} }
@ -326,7 +316,7 @@ static Chardev *qemu_chr_open_spice_port(const CharDriver *driver,
SpiceChardev *s; SpiceChardev *s;
if (name == NULL) { if (name == NULL) {
fprintf(stderr, "spice-qemu-char: missing name parameter\n"); error_setg(errp, "missing name parameter");
return NULL; return NULL;
} }