gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/strace/open.go (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  package strace
    16  
    17  import (
    18  	"gvisor.dev/gvisor/pkg/abi"
    19  	"gvisor.dev/gvisor/pkg/abi/linux"
    20  )
    21  
    22  // OpenMode represents the mode to open(2) a file.
    23  var OpenMode = abi.ValueSet{
    24  	linux.O_RDWR:   "O_RDWR",
    25  	linux.O_WRONLY: "O_WRONLY",
    26  	linux.O_RDONLY: "O_RDONLY",
    27  }
    28  
    29  // OpenFlagSet is the set of open(2) flags.
    30  var OpenFlagSet = abi.FlagSet{
    31  	{
    32  		Flag: linux.O_APPEND,
    33  		Name: "O_APPEND",
    34  	},
    35  	{
    36  		Flag: linux.O_ASYNC,
    37  		Name: "O_ASYNC",
    38  	},
    39  	{
    40  		Flag: linux.O_CLOEXEC,
    41  		Name: "O_CLOEXEC",
    42  	},
    43  	{
    44  		Flag: linux.O_CREAT,
    45  		Name: "O_CREAT",
    46  	},
    47  	{
    48  		Flag: linux.O_DIRECT,
    49  		Name: "O_DIRECT",
    50  	},
    51  	{
    52  		Flag: linux.O_DIRECTORY,
    53  		Name: "O_DIRECTORY",
    54  	},
    55  	{
    56  		Flag: linux.O_EXCL,
    57  		Name: "O_EXCL",
    58  	},
    59  	{
    60  		Flag: linux.O_NOATIME,
    61  		Name: "O_NOATIME",
    62  	},
    63  	{
    64  		Flag: linux.O_NOCTTY,
    65  		Name: "O_NOCTTY",
    66  	},
    67  	{
    68  		Flag: linux.O_NOFOLLOW,
    69  		Name: "O_NOFOLLOW",
    70  	},
    71  	{
    72  		Flag: linux.O_NONBLOCK,
    73  		Name: "O_NONBLOCK",
    74  	},
    75  	{
    76  		Flag: 0x200000, // O_PATH
    77  		Name: "O_PATH",
    78  	},
    79  	{
    80  		Flag: linux.O_SYNC,
    81  		Name: "O_SYNC",
    82  	},
    83  	{
    84  		Flag: linux.O_TMPFILE,
    85  		Name: "O_TMPFILE",
    86  	},
    87  	{
    88  		Flag: linux.O_TRUNC,
    89  		Name: "O_TRUNC",
    90  	},
    91  }
    92  
    93  func open(val uint64) string {
    94  	s := OpenMode.Parse(val & linux.O_ACCMODE)
    95  	if flags := OpenFlagSet.Parse(val &^ linux.O_ACCMODE); flags != "" {
    96  		s += "|" + flags
    97  	}
    98  	return s
    99  }