Open config file in read&write mode

Author: ncounter

containers/proxy-squid/uyuni-configure.py

@@ -9,16 +9,14 @@
     config = yaml.safe_load(source)
 
     # read to existing config file
-    with open("/etc/squid/squid.conf", "r") as dest:
-        file_content = dest.read()
-
-        # adapt the config file
+    with open("/etc/squid/squid.conf", "r+") as config_file:
+        file_content = config_file.read()
         file_content = re.sub(r"cache_dir ufs .*", f"cache_dir ufs /var/cache/squid {str(config['max_cache_size_mb'])} 16 256", file_content)
         file_content = re.sub(r"access_log .*", "access_log stdio:/proc/self/fd/1 squid", file_content)
-
-        # write to file
-        with open("/etc/squid/squid.conf", "w") as dest:
-            dest.write(file_content)
+        # writing back the content
+        config_file.seek(0,0)
+        config_file.write(file_content)
+        config_file.truncate()
 
 # make sure "squid" is the user and group owner of the cache squid path
 os.system('chown -R squid:squid /var/cache/squid')