github.com/waldiirawan/apm-agent-go/v2@v2.2.2/utils_linux_test.go (about)

     1  // Licensed to Elasticsearch B.V. under one or more contributor
     2  // license agreements. See the NOTICE file distributed with
     3  // this work for additional information regarding copyright
     4  // ownership. Elasticsearch B.V. licenses this file to you under
     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package apm
    19  
    20  import (
    21  	"syscall"
    22  	"testing"
    23  	"unsafe"
    24  
    25  	"github.com/stretchr/testify/assert"
    26  )
    27  
    28  func TestCurrentProcessTitle(t *testing.T) {
    29  	origProcessTitle, err := currentProcessTitle()
    30  	assert.NoError(t, err)
    31  
    32  	setProcessTitle := func(title string) {
    33  		var buf [16]byte
    34  		copy(buf[:], title)
    35  		if _, _, errno := syscall.RawSyscall6(
    36  			syscall.SYS_PRCTL, syscall.PR_SET_NAME,
    37  			uintptr(unsafe.Pointer(&buf[0])),
    38  			0, 0, 0, 0,
    39  		); errno != 0 {
    40  			t.Fatal(errno)
    41  		}
    42  	}
    43  
    44  	const desiredTitle = "foo [bar]"
    45  	setProcessTitle(desiredTitle)
    46  	defer setProcessTitle(origProcessTitle)
    47  
    48  	processTitle, err := currentProcessTitle()
    49  	assert.NoError(t, err)
    50  	assert.Equal(t, desiredTitle, processTitle)
    51  }