Date: Sun, 6 Dec 2009 03:27:20 +0200 From: Dmitry Pryanishnikov <lynx.ripe@gmail.com> To: Peter Beckman <beckman@angryox.com> Cc: Mark Linimon <linimon@lonesome.com>, Jim Pazarena <fports@paz.bz>, freebsd-ports@freebsd.org Subject: Re: sshd on FBSD 8.0-RC2/3 Message-ID: <754a9c140912051727l50c037bcg92c44fe7cda087f6@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.0912031333550.56665@nog.angryox.com> References: <4B17D7F3.7080005@gmail.com> <alpine.BSF.2.00.0912031148470.56665@nog.angryox.com> <754a9c140912030913t17c68142u1eec510d73411fef@mail.gmail.com> <alpine.BSF.2.00.0912031333550.56665@nog.angryox.com>
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Hello! 2009/12/3 Peter Beckman <beckman@angryox.com>: > On Thu, 3 Dec 2009, Dmitry Pryanishnikov wrote: > >> Well, ldd's output _itself_ depends on the current environment and >> thus can't insure that correct libraries will be used by the >> application. Compare: > > Well that's just confusing! So what's the default? If I have no > LD_LIBRARY_PATH set, lighttpd uses /usr/local/lib as I would > expect/hope/desire, but I have no understanding as to why. If I set > LD_LIBRARY_PATH to /usr/lib, it uses everything right EXCEPT > /usr/lib/libssl.so.6. What's the logic? How does one do it right? I haven't found definitive answer using RTFM. But luckily it's opensource, so RTFS gives the following search order for rtld-elf (as of RELENG_7): /usr/src/libexec/rtld-elf/rtld.c: /* * Find the library with the given name, and return its full pathname. * The returned string is dynamically allocated. Generates an error * message and returns NULL if the library cannot be found. * * If the second argument is non-NULL, then it refers to an already- * loaded shared object, whose library search path will be searched. * * The search order is: * LD_LIBRARY_PATH * rpath in the referencing file * ldconfig hints * /lib:/usr/lib */ > > web1: 4 : ~/logs/web3 --> unsetenv LD_LIBRARY_PATH > web1: 4 : ~/logs/web3 --> ldd /usr/local/sbin/lighttpd > /usr/local/sbin/lighttpd: > libpcre.so.0 => /usr/local/lib/libpcre.so.0 (0x80066e000) > libssl.so.6 => /usr/local/lib/libssl.so.6 (0x80079e000) > libcrypto.so.6 => /usr/local/lib/libcrypto.so.6 (0x8008eb000) > libc.so.7 => /lib/libc.so.7 (0x800b63000) > libz.so.5 => /lib/libz.so.5 (0x800d9d000) > libthr.so.3 => /lib/libthr.so.3 (0x800eb2000) > web1: 4 : ~/logs/web3 --> setenv LD_LIBRARY_PATH /usr/lib > web1: 4 : ~/logs/web3 --> ldd /usr/local/sbin/lighttpd > /usr/local/sbin/lighttpd: > libpcre.so.0 => /usr/local/lib/libpcre.so.0 (0x80066e000) > libssl.so.6 => /usr/lib/libssl.so.6 (0x80079e000) Looks like 'libssl.so.6 => /usr/local/lib/libssl.so.6' is set via rpath - it overrides standard hints path '/lib:/usr/lib:/usr/lib/compat:/usr/local/lib...' but still can be overridden by LD_LIBRARY_PATH. -- Sincerely, Dmitry nic-hdl: LYNX-RIPE
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