proc_sys.go

Documentation: github.com/prometheus/procfs

     1  // Copyright 2022 The Prometheus Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package procfs
    15  
    16  import (
    17  	"fmt"
    18  	"strings"
    19  
    20  	"github.com/prometheus/procfs/internal/util"
    21  )
    22  
    23  func sysctlToPath(sysctl string) string {
    24  	return strings.Replace(sysctl, ".", "/", -1)
    25  }
    26  
    27  func (fs FS) SysctlStrings(sysctl string) ([]string, error) {
    28  	value, err := util.SysReadFile(fs.proc.Path("sys", sysctlToPath(sysctl)))
    29  	if err != nil {
    30  		return nil, err
    31  	}
    32  	return strings.Fields(value), nil
    33  
    34  }
    35  
    36  func (fs FS) SysctlInts(sysctl string) ([]int, error) {
    37  	fields, err := fs.SysctlStrings(sysctl)
    38  	if err != nil {
    39  		return nil, err
    40  	}
    41  
    42  	values := make([]int, len(fields))
    43  	for i, f := range fields {
    44  		vp := util.NewValueParser(f)
    45  		values[i] = vp.Int()
    46  		if err := vp.Err(); err != nil {
    47  			return nil, fmt.Errorf("%s: field %d in sysctl %s is not a valid int: %w", ErrFileParse, i, sysctl, err)
    48  		}
    49  	}
    50  	return values, nil
    51  }
    52
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