static int
vhd_journal_restore_footer(vhd_journal_t *j, vhd_footer_t *footer)
{
return vhd_write_footer_at(&j->vhd, footer,
j->header.vhd_footer_offset);
}
static int
vhd_journal_restore_footer_copy(vhd_journal_t *j, vhd_footer_t *footer)
{
return vhd_write_footer_at(&j->vhd, footer, 0);
}
int
vhd_util_set_field(int argc, char **argv)
{
long value;
int err, c;
vhd_context_t vhd;
char *name, *field;
err = -EINVAL;
value = 0;
name = NULL;
field = NULL;
if (!argc || !argv)
goto usage;
optind = 0;
while ((c = getopt(argc, argv, "n:f:v:h")) != -1) {
switch (c) {
case 'n':
name = optarg;
break;
case 'f':
field = optarg;
break;
case 'v':
err = 0;
value = strtol(optarg, NULL, 10);
break;
case 'h':
default:
goto usage;
}
}
if (!name || !field || optind != argc || err)
goto usage;
if (strnlen(field, 25) >= 25) {
printf("invalid field\n");
goto usage;
}
if (strcmp(field, "hidden") && strcmp(field, "marker")) {
printf("invalid field %s\n", field);
goto usage;
}
if (value < 0 || value > 255) {
printf("invalid value %ld\n", value);
goto usage;
}
err = vhd_open(&vhd, name, VHD_OPEN_RDWR);
if (err) {
printf("error opening %s: %d\n", name, err);
return err;
}
if (!strcmp(field, "hidden")) {
vhd.footer.hidden = (char)value;
err = vhd_write_footer(&vhd, &vhd.footer);
if (err == -ENOSPC && vhd_type_dynamic(&vhd) && value)
/* if no space to write the primary footer, at least write the
* backup footer so that it's possible to delete the VDI */
err = vhd_write_footer_at(&vhd, &vhd.footer, 0);
} else {
err = vhd_set_marker(&vhd, (char)value);
}
vhd_close(&vhd);
return err;
usage:
printf("options: <-n name> <-f field> <-v value> [-h help]\n");
return -EINVAL;
}
