// The failure conditions here are dealt with by the rubble cleaning code.
static int delete_backup(struct sdirs *sdirs, const char *cname, struct bu *bu,
const char *manual_delete)
{
logp("deleting %s backup %" PRId64 "\n", cname, bu->bno);
if(sdirs->global_sparse)
{
const char *candidate_str=bu->path+strlen(sdirs->base)+1;
if(remove_from_global_sparse(
sdirs->global_sparse, candidate_str))
return -1;
}
if(!bu->next && !bu->prev)
{
// The current, and only, backup.
if(do_rename_w(bu->path, sdirs->deleteme, cname, bu))
return -1;
// If interrupted here, there will be a dangling 'current'
// symlink.
if(unlink(sdirs->current))
{
logp("unlink %s: %s\n",
sdirs->current, strerror(errno));
return -1;
}
return recursive_delete_w(sdirs, bu, manual_delete);
}
if(!bu->next && bu->prev)
{
// The current backup. There are other backups left.
// Need to point the symlink at the previous backup.
const char *target=NULL;
target=bu->prev->basename;
unlink(sdirs->currenttmp);
if(do_symlink(target, sdirs->currenttmp))
return -1;
// If interrupted here, there is a currenttmp and a current
// symlink, and they both point to valid directories.
if(do_rename_w(bu->path, sdirs->deleteme, cname, bu))
return -1;
// If interrupted here, there is a currenttmp and a current
// symlink, and the current link is dangling.
if(do_rename(sdirs->currenttmp, sdirs->current))
return -1;
// If interrupted here, moving the symlink could have failed
// after current was deleted but before currenttmp was renamed.
if(recursive_delete_w(sdirs, bu, manual_delete))
return -1;
return 0;
}
// It is not the current backup.
if(do_rename_w(bu->path, sdirs->deleteme, cname, bu)
|| recursive_delete_w(sdirs, bu, manual_delete))
return -1;
return 0;
}
// The failure conditions here are dealt with by the rubble cleaning code.
int delete_backup(struct sdirs *sdirs, struct conf *conf, struct bu *bu)
{
logp("deleting %s backup %lu\n", conf->cname, bu->bno);
if(!bu->next && !bu->prev)
{
// The current, and only, backup.
if(do_rename_w(bu->path, sdirs->deleteme)) return -1;
// If interrupted here, there will be a dangling 'current'
// symlink.
if(unlink(sdirs->current))
{
logp("unlink %s: %s\n",
sdirs->current, strerror(errno));
return -1;
}
return recursive_delete_w(sdirs, bu);
}
if(!bu->next && bu->prev)
{
// The current backup. There are other backups left.
// Need to point the symlink at the previous backup.
const char *target=NULL;
target=bu->prev->basename;
unlink(sdirs->currenttmp);
if(symlink(target, sdirs->currenttmp))
{
logp("could not symlink '%s' to '%s': %s\n",
sdirs->currenttmp, target, strerror(errno));
return -1;
}
// If interrupted here, there is a currenttmp and a current
// symlink, and they both point to valid directories.
if(do_rename_w(bu->path, sdirs->deleteme))
return -1;
// If interrupted here, there is a currenttmp and a current
// symlink, and the current link is dangling.
if(do_rename_w(sdirs->currenttmp, sdirs->current))
return -1;
// If interrupted here, moving the symlink could have failed
// after current was deleted but before currenttmp was renamed.
if(recursive_delete_w(sdirs, bu))
return -1;
return 0;
}
// It is not the current backup.
if(do_rename_w(bu->path, sdirs->deleteme)
|| recursive_delete_w(sdirs, bu))
return -1;
return 0;
}