Initialize seafile client during container start

dsc/misc.py

@@ -2,15 +2,34 @@ import os
 import pwd
 import subprocess
 
-from dsc.consts import DEFAULT_USERNAME
+from dsc.const import DEFAULT_USERNAME
 
 
 def setup_uid(uid: int, gid: int):
+    """
+    Set GID and UID of default user so that seafile client creates files with
+    correct permissions.
+    If GID does not match, create a new group with the given GID.
+    Then update UID and GID of default user to match the given ones.
+    """
     user_pwinfo = pwd.getpwnam(DEFAULT_USERNAME)
+    create_group(gid)
     if user_pwinfo.pw_uid != uid or user_pwinfo.pw_gid != gid:
         subprocess.call(["usermod", "-o", "-u", str(uid), "-g", str(gid), DEFAULT_USERNAME])
 
 
+def create_group(gid: int):
+    """Search for a group with the given GID. If not found, create a new one."""
+    if not os.path.exists(f"/etc/group"):
+        raise RuntimeError(f"File /etc/group does not exist")
+    with open("/etc/group", "r") as f:
+        for line in f.readlines():
+            cur_gid = line.split(sep=":", maxsplit=3)[2]
+            if int(cur_gid) == gid:
+                return
+    subprocess.call(["groupadd", "-g", str(gid), DEFAULT_USERNAME + "-data"])
+
+
 def create_dir(dir_path: str):
     if not os.path.exists(dir_path):
         os.mkdir(dir_path)