Linux dlopen() 搜索路径
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dlopen() search path
提问by user1055225
is there a way to find out programmatically which paths are searched by dlopen() for shared objects? I always thought dlopen() would only look in /lib and /usr/lib but now I've seen that on Linux Mint several core components like libglib-2.0.so are in a wholly different folders, namely in /rofs/lib/i386-gnu-linux and some others. Is there a way to get to know all these paths that dlopen() will search through for a shared object? I already checked the environment variable LD_LIBRARY_PATH but it's not defined at all.
有没有办法以编程方式找出 dlopen() 为共享对象搜索哪些路径？我一直认为 dlopen() 只会在 /lib 和 /usr/lib 中查找，但现在我看到在 Linux Mint 上，libglib-2.0.so 等几个核心组件位于完全不同的文件夹中，即 /rofs/lib/ i386-gnu-linux 和其他一些。有没有办法了解 dlopen() 将搜索共享对象的所有这些路径？我已经检查了环境变量 LD_LIBRARY_PATH 但它根本没有定义。
采纳答案by Brett Hale
look at the ldconfigman page, and the file: /etc/ld.so.conf
查看ldconfig手册页和文件：/etc/ld.so.conf
回答by Basile Starynkevitch
In addition of the ld.so.confhint:
另外ld.so.conf提示：
If you want to ensure that a specific library is dlopen-ed, pass a path to dlopen, e.g. dlopen("/some/path/to/lib.so", RTLD_LOCAL)or maybe dlopen("./lib.so", RTLD_LOCAL)but not dlopen("lib.so", RTLD_LOCAL)
如果你想确保一个特定的库被dlopen-ed，传递一个路径到dlopen，例如dlopen("/some/path/to/lib.so", RTLD_LOCAL)或者可能dlopen("./lib.so", RTLD_LOCAL)但不是 dlopen("lib.so", RTLD_LOCAL)
