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g364fb: g364fb_screen_dump(): add error handling 

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Luiz Capitulino 2012-05-24 11:28:17 -03:00
parent d9c7ebb100
commit 61a3f955c1
1 changed files with 40 additions and 12 deletions
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52
hw/g364fb.c
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@ -293,7 +293,7 @@ static void g364fb_screen_dump(void *opaque, const char *filename, bool cswitch,
Error **errp)
{
G364State *s = opaque;
int y, x;
int ret, y, x;
uint8_t index;
uint8_t *data_buffer;
FILE *f;
@ -301,35 +301,63 @@ static void g364fb_screen_dump(void *opaque, const char *filename, bool cswitch,
qemu_flush_coalesced_mmio_buffer();
if (s->depth != 8) {
error_report("g364: unknown guest depth %d", s->depth);
error_setg(errp, "g364: unknown guest depth %d", s->depth);
return;
}
f = fopen(filename, "wb");
if (!f)
if (!f) {
error_setg(errp, "failed to open file '%s': %s", filename,
strerror(errno));
return;
}
if (s->ctla & CTLA_FORCE_BLANK) {
/* blank screen */
fprintf(f, "P4\n%d %d\n",
s->width, s->height);
ret = fprintf(f, "P4\n%d %d\n", s->width, s->height);
if (ret < 0) {
goto write_err;
}
for (y = 0; y < s->height; y++)
for (x = 0; x < s->width; x++)
fputc(0, f);
for (x = 0; x < s->width; x++) {
ret = fputc(0, f);
if (ret == EOF) {
goto write_err;
}
}
} else {
data_buffer = s->vram + s->top_of_screen;
fprintf(f, "P6\n%d %d\n%d\n",
s->width, s->height, 255);
ret = fprintf(f, "P6\n%d %d\n%d\n", s->width, s->height, 255);
if (ret < 0) {
goto write_err;
}
for (y = 0; y < s->height; y++)
for (x = 0; x < s->width; x++, data_buffer++) {
index = *data_buffer;
fputc(s->color_palette[index][0], f);
fputc(s->color_palette[index][1], f);
fputc(s->color_palette[index][2], f);
ret = fputc(s->color_palette[index][0], f);
if (ret == EOF) {
goto write_err;
}
ret = fputc(s->color_palette[index][1], f);
if (ret == EOF) {
goto write_err;
}
ret = fputc(s->color_palette[index][2], f);
if (ret == EOF) {
goto write_err;
}
}
}
out:
fclose(f);
return;
write_err:
error_setg(errp, "failed to write to file '%s': %s", filename,
strerror(errno));
unlink(filename);
goto out;
}
/* called for accesses to io ports */