Linux-PAM和内核之间的关系是什么? Linux-PAM是内核的一部分吗?
当我使用 sudo , tty ,这种认证是否在内核空间完成?
PAM完全处于用户空间,它是由需要验证证书的程序所利用的一套图书馆。
例如,我的机器放映中的ld/usr/bin/sudo
linux-vdso.so.1 => (0x00007fff30fff000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f5923fd4000)
libpam.so.0 => /lib/x86_64-linux-gnu/libpam.so.0 (0x00007f5923dc7000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f5923bc2000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f592382d000)
/lib64/ld-linux-x86-64.so.2 (0x00007f59241fd000)
使用 PAM 图书馆的二进制程序需要作为根运行(例如,图书馆代码可能需要访问/etc/shadow)。
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