github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/util/temp_umask.h (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #ifndef GVISOR_TEST_UTIL_TEMP_UMASK_H_
    16  #define GVISOR_TEST_UTIL_TEMP_UMASK_H_
    17  
    18  #include <sys/stat.h>
    19  #include <sys/types.h>
    20  
    21  namespace gvisor {
    22  namespace testing {
    23  
    24  class TempUmask {
    25   public:
    26    // Sets the process umask to `mask`.
    27    explicit TempUmask(mode_t mask) : old_mask_(umask(mask)) {}
    28  
    29    // Sets the process umask to its previous value.
    30    ~TempUmask() { umask(old_mask_); }
    31  
    32   private:
    33    mode_t old_mask_;
    34  };
    35  
    36  }  // namespace testing
    37  }  // namespace gvisor
    38  
    39  #endif  // GVISOR_TEST_UTIL_TEMP_UMASK_H_