ldd
Created by : Mr Dk.
2023 / 01 / 07 14:59
Hangzhou, Zhejiang, China
Background
ldd 用于打印程序或共享库的共享库依赖。通常情况下，ldd 会调用动态链接器以及环境变量中的 LD_TRACE_LOADED_OBJECTS，使其检查程序的动态链接依赖，并寻找和加载这些依赖。最后，显示这些依赖的名称，以及这些共享库加载后的地址。
在安全性上，ldd 有可能需要通过直接执行程序的方式来获取依赖，所以不能用它来获取不受信任的程序的依赖，否则将会引发任意代码执行的问题。对于不信任的程序，可以用以下方法获取其依赖：
$ objdump -p /path/to/program | grep NEEDED
Usage
$ ldd --help
Usage: ldd [OPTION]... FILE...
--help print this help and exit
--version print version information and exit
-d, --data-relocs process data relocations
-r, --function-relocs process data and function relocations
-u, --unused print unused direct dependencies
-v, --verbose print all information
For bug reporting instructions, please see:
<https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>.
$ ldd python3.8
linux-vdso.so.1 (0x00007fff6ab60000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f49681a4000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f4968181000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f496817b000)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1 (0x00007f4968176000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4968027000)
libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f4967ff9000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f4967fdb000)
/lib64/ld-linux-x86-64.so.2 (0x00007f49683a1000)
使用 -v 选项可以递归打印每个依赖库的依赖信息和版本信息：
$ ldd -v ssh
linux-vdso.so.1 (0x00007fff66f55000)
libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f1e6d5a6000)
libcrypto.so.1.1 => /lib/x86_64-linux-gnu/libcrypto.so.1.1 (0x00007f1e6d2d0000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f1e6d2ca000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f1e6d2ae000)
libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f1e6d292000)
libgssapi_krb5.so.2 => /lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007f1e6d245000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1e6d051000)
libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x00007f1e6cfc1000)
/lib64/ld-linux-x86-64.so.2 (0x00007f1e6d6a2000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f1e6cf9e000)
libkrb5.so.3 => /lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007f1e6cec1000)
libk5crypto.so.3 => /lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007f1e6ce90000)
libcom_err.so.2 => /lib/x86_64-linux-gnu/libcom_err.so.2 (0x00007f1e6ce89000)
libkrb5support.so.0 => /lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007f1e6ce78000)
libkeyutils.so.1 => /lib/x86_64-linux-gnu/libkeyutils.so.1 (0x00007f1e6ce71000)
Version information:
./ssh:
libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2
libresolv.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libresolv.so.2
libcrypto.so.1.1 (OPENSSL_1_1_0) => /lib/x86_64-linux-gnu/libcrypto.so.1.1
libgssapi_krb5.so.2 (gssapi_krb5_2_MIT) => /lib/x86_64-linux-gnu/libgssapi_krb5.so.2
libc.so.6 (GLIBC_2.26) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.7) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.17) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.25) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libselinux.so.1:
libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2
ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.7) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.30) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libcrypto.so.1.1:
libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2
libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0
libc.so.6 (GLIBC_2.15) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.25) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.7) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.17) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.16) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libdl.so.2:
ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2
libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libz.so.1:
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libresolv.so.2:
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libgssapi_krb5.so.2:
libk5crypto.so.3 (k5crypto_3_MIT) => /lib/x86_64-linux-gnu/libk5crypto.so.3
libkrb5support.so.0 (krb5support_0_MIT) => /lib/x86_64-linux-gnu/libkrb5support.so.0
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.27) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libkrb5.so.3 (krb5_3_MIT) => /lib/x86_64-linux-gnu/libkrb5.so.3
/lib/x86_64-linux-gnu/libc.so.6:
ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2
ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2
/lib/x86_64-linux-gnu/libpcre2-8.so.0:
libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libpthread.so.0:
ld-linux-x86-64.so.2 (GLIBC_2.2.5) => /lib64/ld-linux-x86-64.so.2
ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2
libc.so.6 (GLIBC_2.7) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.2) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libkrb5.so.3:
libresolv.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libresolv.so.2
libresolv.so.2 (GLIBC_2.9) => /lib/x86_64-linux-gnu/libresolv.so.2
libk5crypto.so.3 (k5crypto_3_MIT) => /lib/x86_64-linux-gnu/libk5crypto.so.3
libkrb5support.so.0 (krb5support_0_MIT) => /lib/x86_64-linux-gnu/libkrb5support.so.0
libkeyutils.so.1 (KEYUTILS_1.0) => /lib/x86_64-linux-gnu/libkeyutils.so.1
libkeyutils.so.1 (KEYUTILS_1.5) => /lib/x86_64-linux-gnu/libkeyutils.so.1
libkeyutils.so.1 (KEYUTILS_0.3) => /lib/x86_64-linux-gnu/libkeyutils.so.1
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.16) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libk5crypto.so.3:
libkrb5support.so.0 (krb5support_0_MIT) => /lib/x86_64-linux-gnu/libkrb5support.so.0
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libcom_err.so.2:
ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2
libpthread.so.0 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libpthread.so.0
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.17) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libkrb5support.so.0:
libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2
libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
/lib/x86_64-linux-gnu/libkeyutils.so.1:
libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.7) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6