fd.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/ctrlserver/graph

     1  // Copyright 2021 Chaos Mesh 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  
    16  package graph
    17  
    18  import (
    19  	"context"
    20  	"fmt"
    21  	"strings"
    22  
    23  	"github.com/chaos-mesh/chaos-mesh/pkg/ctrlserver/graph/model"
    24  )
    25  
    26  // GetFdsOfProcess returns fd-target pairs
    27  func (r *Resolver) GetFdsOfProcess(ctx context.Context, process *model.Process) ([]*model.Fd, error) {
    28  	cmd := fmt.Sprintf("ls -l /proc/%s/fd", process.Pid)
    29  	out, err := r.ExecBypass(ctx, process.Pod, cmd)
    30  	if err != nil {
    31  		return nil, err
    32  	}
    33  	var fds []*model.Fd
    34  	for _, line := range strings.Split(out, "\n") {
    35  		fields := strings.Fields(line)
    36  		length := len(fields)
    37  		if length < 3 {
    38  			// skip
    39  			continue
    40  		}
    41  		fd := &model.Fd{
    42  			Fd:     fields[length-3],
    43  			Target: fields[length-1],
    44  		}
    45  		fds = append(fds, fd)
    46  	}
    47  
    48  	return fds, nil
    49  }
    50