HP-UX /usr/lib/dld.sl: Can't open shared library:解决办法

本文链接：https://blog.youkuaiyun.com/huluedeai/article/details/51324815

在HP-UX系统中遇到错误"/usr/lib/dld.sl: Can't open shared library"，解决方案是设置环境变量SHLIB_PATH，指向所需库的路径，例如：/usr1/arbor/3pACE/ACE_wrappers/build/HPUX/ace等。通过使用chatr +s enable选项，允许程序利用SHLIB_PATH找到共享库。

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我在HP-UX上编译完一个程序的时候，ldd 这个binary的时候发现程序link的lib并不是按照我在环境变量中设置的SHLIB_PATH，而是取了其他值.这个很奇怪，感觉link 的lib被hardcode。

ldd $ARBORBIN/MRM
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libc.2 => /usr/lib/libc.2
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libxti.2 => /usr/lib/libxti.2
/usr/lib/libc.2 => /usr/lib/libc.2
/usr/lib/libm.2 => /usr/lib/libm.2
/usr/lib/libcl.2 => /usr/lib/libcl.2
/usr/lib/libisamstub.1 => /usr/lib/libisamstub.1
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0 => /usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0
/usr/lib/libcl.2 => /usr/lib/libcl.2
/usr/lib/libc.2 => /usr/lib/libc.2
/usr/lib/libm.2 => /usr/lib/libm.2
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libnss_dns.1 => /usr/lib/libnss_dns.1
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libpthread.1 => /usr/lib/libpthread.1
/usr/lib/librt.2 => /usr/lib/librt.2
/db/ora_mnt1/app/oracle/product/9.2.0.5_Client/lib32/libwtc9.sl => /usr1/arbor/3poracle/HPUX/lib/libwtc9.sl
/usr/lib/libpthread.1 => /usr/lib/libpthread.1
/usr1/arbor/src/lib/liboam_emit.sl => /usr1/arbor/src/lib/liboam_emit.sl
/usr/lib/libstd_v2.2 => /usr/lib/libstd_v2.2
/usr/lib/libCsup_v2.2 => /usr/lib/libCsup_v2.2
/usr1/arbor/src/lib/libismutil.sl => /usr1/arbor/src/lib/libismutil.sl

env |grep SH

15:SHLIB_PATH=/usr1/arbor/3pACE/ACE_wrappers/build/HPUX/ace:/usr1/arbor/3p/rosette/HPUX/rel/lib/

:/opt/app/oracle/product/9.2.0.5/lib32:/usr1/arbor/idesign_site/lib:/usr1/arbor/3pxml/xerces/HPUX/lib:/app/arborperl/5.8.2/lib.....

这样子的话，当程序放到客户的环境上是，客户那根本没有/usr1/arbor/3p/oracle/HPUX/lib这个目录，肯定就是找不到这个文件了.

于是在客户的环境上，出现了以下问题：
celcom@milhpit1@CELTCUS:/home/tss/celcom/celcom_tss/yyang 35 : ./MRM
/usr/lib/dld.sl: Can't open shared library: /usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0
/usr/lib/dld.sl: No such file or directory
Abort (core dumped)

celcom@milhpit1@CELTCUS:/home/tss/celcom/celcom_tss/yyang 54 : ldd MRM
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libc.2 => /usr/lib/libc.2
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libxti.2 => /usr/lib/libxti.2
/usr/lib/libc.2 => /usr/lib/libc.2
/usr/lib/libm.2 => /usr/lib/libm.2
/usr/lib/libcl.2 => /usr/lib/libcl.2
/usr/lib/libisamstub.1 => /usr/lib/libisamstub.1
/usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/dld.sl: Can't open shared library: /usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0
/usr/lib/dld.sl: No such file or directory

最后找到一个workaround方法，就是不用改程序，只是用chatr +s enable MRM
celcom@milhpit1@CELTCUS:/home/tss/celcom/celcom_tss/yyang 61 : chatr +s enable MRM
MRM:
current values:
normal executable
shared library dynamic path search:
SHLIB_PATH disabled second
embedded path disabled first Not Defined
shared library list:
dynamic /usr1/arbor/src/lib/libismutil.sl
dynamic /usr/lib/libCsup_v2.2
dynamic /usr/lib/libstd_v2.2
dynamic /usr1/arbor/src/lib/liboam_emit.sl
dynamic /usr/lib/libpthread.1
dynamic /usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0
dynamic /usr/lib/libcl.2
dynamic /usr/lib/libm.2
dynamic /usr/lib/libc.2
dynamic /usr/lib/libxti.2
static /usr/lib/libdld.2
shared library binding:
deferred
global hash table disabled
plabel caching disabled
global hash array size:1103
global hash array nbuckets:3
shared vtable support disabled
explicit unloading enabled
static branch prediction disabled
executable from stack: D (default)
kernel assisted branch prediction enabled
lazy swap allocation disabled
text segment locking disabled
data segment locking disabled
third quadrant private data space disabled
fourth quadrant private data space disabled
third quadrant global data space disabled
data page size: D (default)
instruction page size: D (default)
nulptr references disabled
shared library private mapping disabled
shared library text merging disabled
new values:
normal executable
shared library dynamic path search:
SHLIB_PATH enabled second
embedded path disabled first Not Defined
shared library list:
dynamic /usr1/arbor/src/lib/libismutil.sl
dynamic /usr/lib/libCsup_v2.2
dynamic /usr/lib/libstd_v2.2
dynamic /usr1/arbor/src/lib/liboam_emit.sl
dynamic /usr/lib/libpthread.1
dynamic /usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0
dynamic /usr/lib/libcl.2
dynamic /usr/lib/libm.2
dynamic /usr/lib/libc.2
dynamic /usr/lib/libxti.2
static /usr/lib/libdld.2
shared library binding:
deferred
global hash table disabled
plabel caching disabled
global hash array size:1103
global hash array nbuckets:3
shared vtable support disabled
explicit unloading enabled
static branch prediction disabled
executable from stack: D (default)
kernel assisted branch prediction enabled
lazy swap allocation disabled
text segment locking disabled
data segment locking disabled
third quadrant private data space disabled
fourth quadrant private data space disabled
third quadrant global data space disabled
data page size: D (default)
instruction page size: D (default)
nulptr references disabled
shared library private mapping disabled
shared library text merging disabled

我们ldd看一下：
celcom@milhpit1@CELTCUS:/home/tss/celcom/celcom_tss/yyang 62 : ldd MRM /usr/lib/libdld.2 => /usr/lib/libdld.2
/usr/lib/libc.2 => /lib/libc.2
/usr/lib/libdld.2 => /lib/libdld.2
/usr/lib/libxti.2 => /lib/libxti.2
/usr/lib/libc.2 => /lib/libc.2
/usr/lib/libm.2 => /lib/libm.2
/usr/lib/libcl.2 => /lib/libcl.2
/usr/lib/libisamstub.1 => /lib/libisamstub.1
/usr/lib/libdld.2 => /lib/libdld.2
/usr1/arbor/3p/oracle/HPUX/lib/libclntsh.sl.9.0 => /opt/app/oracle/product/9.2.0.5/lib32/libclntsh.sl.9.0
/usr/lib/libcl.2 => /lib/libcl.2
/usr/lib/libc.2 => /lib/libc.2
/usr/lib/libm.2 => /lib/libm.2
/usr/lib/libdld.2 => /lib/libdld.2
/usr/lib/libnss_dns.1 => /lib/libnss_dns.1
/usr/lib/libdld.2 => /lib/libdld.2
/usr/lib/libpthread.1 => /lib/libpthread.1
/usr/lib/librt.2 => /lib/librt.2
/opt/app/oracle/product/9.2.0.5/lib32/libwtc9.sl => /opt/app/oracle/product/9.2.0.5/lib32/libwtc9.sl
/usr/lib/libpthread.1 => /lib/libpthread.1
/usr1/arbor/src/lib/liboam_emit.sl => /home/tss/celcom/celcom_tss/site_specific/lib/liboam_emit.sl
/usr/lib/libstd_v2.2 => /lib/libstd_v2.2
/usr/lib/libCsup_v2.2 => /lib/libCsup_v2.2

/usr1/arbor/src/lib/libismutil.sl => /home/tss/celcom/celcom_tss/site_specific/lib/libismutil.sl

in summary ：The chatr +s enable option allows a program to utilize SHLIB_PATH to locate shared libraries.