在OSX 10.9中使用DYLD_BIND_AT_LAUNCH和sshfs进行安装?

时间:2017-10-08 13:38:18

标签: c macos sshfs dtruss

我正在尝试在OSX 10.9上的this gist构建示例:

cd /tmp
git clone https://gist.github.com/ecfd80885b9ddf6734192c056cf48bf4.git fopentest
cd fopentest
bash buildrun.sh

构建成功 - 此外,我可以在终端输出中看到以下内容:

...
+ DYLD_BIND_AT_LAUNCH=YES
+ ./fopentest.exe ./mytestfile.txt
This is a wrapper function for fopen.
=== this is mytestfile.txt ===
Second line here...
Third line here...

这意味着调用DYLD_BIND_AT_LAUNCH=YES ./fopentest.exe ./mytestfile.txt成功找到了包装器库和函数。

现在,作为一项测试,我想通过dtrussOSX “strace” equivalent运行此可执行文件 - 我也在该链接中推荐了sudo chmod u+s /usr/sbin/dtrace。所以我试试/tmp文件夹:

$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
This is a wrapper function for fopen.
stat64("libwrapper.dylib\0", 0x7FFF5A7DF248, 0x7FFF5A7E00E0)         = 0 0
open("libwrapper.dylib\0", 0x0, 0x0)         = 3 0
write_nocancel(0x1, "This is a wrapper function for fopen.\n=== this is mytestfile.txt ===\nSecond line here...\nThird line here...\n\0", 0x6C)      = 108 0

所以,显然dtruss可行。但是,我在不同的目录中有完全相同的文件,为什么我尝试运行相同的命令,dtruss失败:

$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
dyld: Library not loaded: libwrapper.dylib
stat64("libwrapper.dylib\0", 0x7FFF4FD85228, 0x7FFF4FD860C0)         = 0 0
open("libwrapper.dylib\0", 0x0, 0x0)         = -1 Err#2
stat64("/Users/MYNAME/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0)       = -1 Err#2
stat64("/usr/local/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0)      = -1 Err#2
stat64("/usr/lib/libwrapper.dylib\0", 0x7FFF4FD85A18, 0x7FFF4FD860C0)        = -1 Err#2

这可能是什么原因?

1 个答案:

答案 0 :(得分:0)

嗯,我想我明白原因是什么:dtruss无法找到库的目录实际上是通过sshfs挂载的; mount为此路径显示了这一点:

MYOTHERNAME@myRemotePC:/media/Test1 on /media/Test1 (osxfusefs, nodev, nosuid, synchronous, mounted by MYNAME)

所以,如果我尝试在DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt中拨打/media/Test1/fopentest/,那么我会得到" dyld: Library not loaded: libwrapper.dylib"。

但是,如果我将该文件夹移动到"适当的"文件系统,比如$HOMEmv /media/Test1/fopentest ~/,我甚至不需要重建,我只需拨打DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt中的~/fopentest/,呼叫就会成功...

不确定为什么会发生这种情况 - 所以一定会更感谢你提供更丰富的答案......