contrib/apr/include/arch/unix/apr_arch_inherit.h

   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 */