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apr_arch_inherit.h
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1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2  * contributor license agreements. See the NOTICE file distributed with
3  * this work for additional information regarding copyright ownership.
4  * The ASF licenses this file to You under the Apache License, Version 2.0
5  * (the "License"); you may not use this file except in compliance with
6  * the License. You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef INHERIT_H
18 #define INHERIT_H
19 
20 #include "apr_inherit.h"
21 
22 #define APR_INHERIT (1 << 24) /* Must not conflict with other bits */
23 
24 #define APR_IMPLEMENT_INHERIT_SET(name, flag, pool, cleanup) \
25 apr_status_t apr_##name##_inherit_set(apr_##name##_t *the##name) \
26 { \
27  if (the##name->flag & APR_FOPEN_NOCLEANUP) \
28  return APR_EINVAL; \
29  if (!(the##name->flag & APR_INHERIT)) { \
30  int flags = fcntl(the##name->name##des, F_GETFD); \
31  if (flags == -1) \
32  return errno; \
33  flags &= ~(FD_CLOEXEC); \
34  if (fcntl(the##name->name##des, F_SETFD, flags) == -1) \
35  return errno; \
36  the##name->flag |= APR_INHERIT; \
37  apr_pool_child_cleanup_set(the##name->pool, \
38  (void *)the##name, \
39  cleanup, apr_pool_cleanup_null); \
40  } \
41  return APR_SUCCESS; \
42 }
43 
44 #define APR_IMPLEMENT_INHERIT_UNSET(name, flag, pool, cleanup) \
45 apr_status_t apr_##name##_inherit_unset(apr_##name##_t *the##name) \
46 { \
47  if (the##name->flag & APR_FOPEN_NOCLEANUP) \
48  return APR_EINVAL; \
49  if (the##name->flag & APR_INHERIT) { \
50  int flags; \
51  if ((flags = fcntl(the##name->name##des, F_GETFD)) == -1) \
52  return errno; \
53  flags |= FD_CLOEXEC; \
54  if (fcntl(the##name->name##des, F_SETFD, flags) == -1) \
55  return errno; \
56  the##name->flag &= ~APR_INHERIT; \
57  apr_pool_child_cleanup_set(the##name->pool, \
58  (void *)the##name, \
59  cleanup, cleanup); \
60  } \
61  return APR_SUCCESS; \
62 }
63 
64 #endif /* ! INHERIT_H */
APR File Handle Inheritance Helpers.