Fix receive open mode when img file not present

Fix error from chattr

Fix get_lvm_vgs when local volgroup is missing

wyng

@@ -321,6 +321,14 @@ class ArchiveSet:
             assert hmac.compare_digest(digest, self.b64hash(mbuf))
             open(destname,"wb").write(self.decompress(mbuf))
 
+    def set_local(self, localpath):
+        vgp = opts.local.split("/")
+        if len(vgp) != 2:   raise ValueError("Local: 'volgroup/pool' required.")
+        self.vgname, self.poolname = vgp
+        if self.vgname not in volgroups \
+        or self.poolname not in volgroups[self.vgname][self.poolname]:
+            print("Warning: {localpath} not present.")
+
 
 class ArchiveVolume:
 
@@ -474,7 +482,8 @@ class ArchiveVolume:
     def decode_manifests(self, sesnames, force=False):
         for ses in (self.sessions[x] for x in sesnames):
             if ses.path and force:
-                os.makedirs(ses.path, exist_ok=True)    ; do_exec([[CP.chattr, "+c", ses.path]])
+                os.makedirs(ses.path, exist_ok=True)
+                do_exec([[CP.chattr, "+c", ses.path]], check=False)
             self.decode_one_manifest(ses, force=force)
 
 
@@ -936,7 +945,7 @@ def get_lvm_vgs(vg_to_lvols=None):
             volgroups[vgname].lvs[lvname] = lv
             if lv.pool_lv:   volgroups[vgname].poolnames.add(lv.pool_lv)
 
-    if vg_to_lvols:  l_vols = volgroups[vg_to_lvols].lvs
+    l_vols = volgroups[vg_to_lvols].lvs if vg_to_lvols in volgroups else {}
 
 
 def lv_exists(vgname, lvname):
@@ -1041,13 +1050,10 @@ def clear_array(ar):
 # Initialize a new ArchiveSet:
 
 def arch_init(aset, opts):
-    if not opts.local or not opts.dest:
-        x_it(1,"--local and --dest are required together.")
+    if not opts.local and not opts.from_arch:
+        x_it(1,"--local is required for init.")
 
-    if opts.local:
-        vgname, poolname = opts.local.split("/")
-        aset.vgname   = vgname
-        aset.poolname = poolname
+    if opts.local:   aset.set_local(opts.local)
 
     if opts.from_arch:
         return
@@ -1199,6 +1205,7 @@ def get_configs(opts):
     arch_name = "default"
     load_children = 1 if opts.action in ("arch-delete","delete","add") else 2
 
+    # Get destination
     dest = Destination(opts.from_arch or opts.dest, opts.dest_name, arch_name)
     if (opts.action not in local_actions and dest.sys is not None) \
     or opts.remap or opts.from_arch:
@@ -1252,7 +1259,7 @@ def get_configs_remote(dest, aname, recv_dir):
     recv_list= [(x+"/volinfo", ArchiveSet.max_volinfosz)
                  for x in new_aset.conf["volumes"].keys()]
     fetch_file_blobs(recv_list, recv_dir, dest)
-    do_exec([[CP.chattr, "+c"] + list(new_aset.conf["volumes"].keys())], cwd=recv_dir)
+    do_exec([[CP.chattr, "+c"] + list(new_aset.conf["volumes"].keys())], cwd=recv_dir, check=False)
     new_aset = ArchiveSet(aname, os.path.dirname(recv_dir), dest, children=1, allvols=True,
                           prior_auth=new_aset)
 
@@ -2941,16 +2948,16 @@ def receive_volume(vol, select_ses="", save_path="", diff=False, verify_only=0):
 
         if exists(save_path) and stat.S_ISBLK(os.stat(save_path).st_mode):
             if not sparse_write:   do_exec([[CP.blkdiscard, save_path]])
-            volf = open(save_path, fopenmode:="r+b")
+            volf = open(save_path, "r+b")
         elif save_path.startswith("/dev/"):
             err_out("Cannot create new volume from ambiguous /dev path."
                     " Please create the volume before using 'receive', or specify"
                     " --save-to=/dev/volgroup/lv in case of a thin LV.")
             return None
         else: # file
             save_type = "file"   ; punch_hole = low_level_io.file_punch_hole
-            fopenmode = "r+b" if sparse_write and exists(save_path) else "wb"
-            volf = open(save_path, fopenmode)   ; volf.truncate(volsize)
+            if not exists(save_path):   open(save_path, "wb").close()
+            volf = open(save_path, "r+b")   ; volf.truncate(volsize)
 
     elif diff:
         if not lv_exists(vgname, datavol):
@@ -3371,7 +3378,7 @@ def cleanup():
 
 # Constants / Globals
 prog_name             = "wyng"
-prog_version          = "0.4alpha2"     ; prog_date = "20230225"
+prog_version          = "0.4alpha2"     ; prog_date = "20230306"
 format_version        = 3               ; debug     = False       ; tmpdir = None
 admin_permission      = os.getuid() == 0
 aset = dest = None
@@ -3732,4 +3739,5 @@ elif options.action == "arch-deduplicate":
 
 
 cleanup()
+
 # END