github.com/waldiirawan/apm-agent-go/v2@v2.2.2/utils_linux.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 // import "github.com/waldiirawan/apm-agent-go/v2"
    19  
    20  import (
    21  	"bytes"
    22  	"syscall"
    23  	"unsafe"
    24  )
    25  
    26  func currentProcessTitle() (string, error) {
    27  	// PR_GET_NAME (since Linux 2.6.11)
    28  	// Return the name of the calling thread, in the buffer pointed to by
    29  	// (char *) arg2.  The buffer should allow space for up to 16 bytes;
    30  	// the returned string will be null-terminated.
    31  	var buf [16]byte
    32  	if _, _, errno := syscall.RawSyscall6(
    33  		syscall.SYS_PRCTL, syscall.PR_GET_NAME,
    34  		uintptr(unsafe.Pointer(&buf[0])),
    35  		0, 0, 0, 0,
    36  	); errno != 0 {
    37  		return "", errno
    38  	}
    39  	return string(buf[:bytes.IndexByte(buf[:], 0)]), nil
    40  }