Question

我正在尝试编写一个与Android ADB命令交互的gem。我无法理解如何将参数传递给子流程。

我正在使用POpen4 gem，它只是特定于open3 / open4模块的平台的包装器。在OSX上，我运行以下命令，然后返回所需的输出：

>> require 'POpen4'
=> true
>> POpen4::popen4("/Library/android-sdk-mac_x86/platform-tools/adb shell pm list packages -f") do |pout, perr, pin|
?> pout.each { |line| puts line.to_s.strip }
>> end
package:/system/app/Fallback.apk=com.android.fallback
package:/system/app/SoundRecorder.apk=com.android.soundrecorder
..<snip>..
package:/system/app/VpnServices.apk=com.android.server.vpn
=> #<Process::Status: pid=13833,exited(0)>

当我在Win32上运行时，我得到：

irb(main):001:0> require 'POpen4'
=> true
irb(main):002:0> POpen4::popen4("C:\\Android\\android-sdk-windows\\platform-tools\\adb.exe shell pm list packages -f")
Errno::ENOENT: No such file or directory - C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f
        from C:/Ruby192/lib/ruby/1.9.1/open3.rb:202:in `spawn'
        from C:/Ruby192/lib/ruby/1.9.1/open3.rb:202:in `popen_run'
        from C:/Ruby192/lib/ruby/1.9.1/open3.rb:90:in `popen3'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/win32-open3-19-0.0.1/lib/win32/open3.rb:5:in `popen4'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/POpen4-0.1.4/lib/popen4.rb:48:in `popen4'
        from (irb):2
        from C:/Ruby192/bin/irb:12:in `<main>'

如果我使用procexp监视Ruby正在做什么，我可以看到它将popen4的整个参数视为要运行的命令：

ruby.exe    5800    QueryDirectory  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.exe NO SUCH FILE
ruby.exe    5800    QueryOpen   C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.exe FAST IO DISALLOWED  
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.exe NAME NOT FOUND
ruby.exe    5800    QueryDirectory  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.com NO SUCH FILE
ruby.exe    5800    QueryOpen   C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.com FAST IO DISALLOWED  
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.com NAME NOT FOUND
ruby.exe    5800    QueryDirectory  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.cmd NO SUCH FILE
ruby.exe    5800    QueryOpen   C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.cmd FAST IO DISALLOWED  
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.cmd NAME NOT FOUND
ruby.exe    5800    QueryDirectory  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.bat NO SUCH FILE
ruby.exe    5800    QueryOpen   C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.bat FAST IO DISALLOWED  
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f.bat NAME NOT FOUND
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f NAME NOT FOUND
ruby.exe    5800    CreateFile  C:\Android\android-sdk-windows\platform-tools\adb.exe shell pm list packages -f NAME NOT FOUND

虽然popen3文档说这应该被视为命令行和参数：

The parameters +cmd…+ is passed to Process.spawn. So a commandline string and list of argument strings can be accepted as follows.

  Open3.popen3("echo a") {|i, o, e, t| ... }
  Open3.popen3("echo", "a") {|i, o, e, t| ... }
  Open3.popen3(["echo", "argv0"], "a") {|i, o, e, t| ... }

我在这里缺少什么？

传递给使用popen3（spawn）的参数？

0 个答案: