[PATCH] python: Split "semanage import" into two transactions

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First transaction applies all deletion operations, so that there are no
collisions when applying the rest of the changes.

Fixes:
  # semanage port -a -t http_cache_port_t -r s0 -p tcp 3024
  # semanage export | semanage import
  ValueError: Port tcp/3024 already defined

Signed-off-by: Vit Mojzis <vmojzis@xxxxxxxxxx>
---
 python/semanage/semanage | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/python/semanage/semanage b/python/semanage/semanage
index 8f4e44a7..1d828128 100644
--- a/python/semanage/semanage
+++ b/python/semanage/semanage
@@ -852,10 +852,29 @@ def handleImport(args):
     trans = seobject.semanageRecords(args)
     trans.start()
 
+    deleteCommands = []
+    commands = []
+    # separate commands for deletion from the rest so they can be
+    # applied in a separate transaction
     for l in sys.stdin.readlines():
         if len(l.strip()) == 0:
             continue
+        if "-d" in l or "-D" in l:
+            deleteCommands.append(l)
+        else:
+            commands.append(l)
+
+    if deleteCommands:
+        importHelper(deleteCommands)
+        trans.finish()
+        trans.start()
+
+    importHelper(commands)
+    trans.finish()
 
+
+def importHelper(commands):
+    for l in commands:
         try:
             commandParser = createCommandParser()
             args = commandParser.parse_args(mkargv(l))
@@ -869,8 +888,6 @@ def handleImport(args):
         except KeyboardInterrupt:
             sys.exit(0)
 
-    trans.finish()
-
 
 def setupImportParser(subparsers):
     importParser = subparsers.add_parser('import', help=_('Import local customizations'))
-- 
2.35.1




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