github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/cmd/geth/library_android.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of go-ethereum.
     3  //
     4  // go-ethereum is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // go-ethereum is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU General Public License
    15  // along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // Contains specialized code for running Geth on Android.
    18  
    19  package main
    20  
    21  // #include <android/log.h>
    22  // #cgo LDFLAGS: -llog
    23  import "C"
    24  import (
    25  	"bufio"
    26  	"os"
    27  )
    28  
    29  func init() {
    30  	// Redirect the standard output and error to logcat
    31  	oldStdout, oldStderr := os.Stdout, os.Stderr
    32  
    33  	outRead, outWrite, _ := os.Pipe()
    34  	errRead, errWrite, _ := os.Pipe()
    35  
    36  	os.Stdout = outWrite
    37  	os.Stderr = errWrite
    38  
    39  	go func() {
    40  		scanner := bufio.NewScanner(outRead)
    41  		for scanner.Scan() {
    42  			line := scanner.Text()
    43  			C.__android_log_write(C.ANDROID_LOG_INFO, C.CString("Stdout"), C.CString(line))
    44  			oldStdout.WriteString(line + "\n")
    45  		}
    46  	}()
    47  
    48  	go func() {
    49  		scanner := bufio.NewScanner(errRead)
    50  		for scanner.Scan() {
    51  			line := scanner.Text()
    52  			C.__android_log_write(C.ANDROID_LOG_INFO, C.CString("Stderr"), C.CString(line))
    53  			oldStderr.WriteString(line + "\n")
    54  		}
    55  	}()
    56  }