Hi. On Thu, 2 Apr 2015 15:06:42 -0400 Gene Heskett <ghesk...@wdtv.com> wrote:
> "ldd" says its not an executable, but then says ldd itself is not, > while "file" says its (ldd) a Bourne Again SHell script. > > Am I compromized? Let's see what all fuss is about. First, wget -q http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/37.0/linux-x86_64/en-US/firefox-37.0.tar.bz2 Second, wget -q ftp.mozilla.org/pub/mozilla.org/firefox/releases/37.0/SHA512SUMS Third, sha512sum firefox-37.0.tar.bz2 Fourth, grep 665f856cd9f69db2122c6d5bf25305e0ffa60bb56f342be9512cbe81e912c0966a7e100ce2d0e30bf978cf94fcf43a2de4c8afa6834ebd46ff7b292f6eec3224 SHA512SUMS And hurray, I've apparently got Genuine™ Mozilla Firefox 37. Next, tar xf firefox-37.0.tar.bz2 && cd firefox And, finally $ file firefox firefox: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, BuildID [sha1]=0xd9c52e07232a78690be6d991546a12bb3668601d, stripped $ file --mime-type firefox firefox: application/x-executable So, it's definitely a binary. Yet, $ ldd ./firefox not a dynamic executable Why? That's why: $ pwd /tmp/firefox $ mount | grep /tmp tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime,size=12234980k) Notice *noexec* here. You see, ldd actually tries to execute a file (by using special hack in ld.so, so that's OK). And of course, if you put an executable at no-executable mountpoint, not only you won't be able to run it, ldd also ceases to work. And yes, ldd is a shell script. A customary way to prepend hacky environment variables to executables is using shell wrappers. ldd is just one of those. Still, if ldd fails you - use objdump: $ objdump -x firefox | grep NEED NEEDED libpthread.so.0 NEEDED libdl.so.2 NEEDED librt.so.1 NEEDED libstdc++.so.6 NEEDED libm.so.6 NEEDED libgcc_s.so.1 NEEDED libc.so.6 NEEDED ld-linux-x86-64.so.2 VERNEED 0x00000000004036c8 VERNEEDNUM 0x0000000000000007 tl;dr version - move your firefox directory to filesystem mounted with exec. Problem should solve itself. Reco -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/20150402223517.1c0ad5c8234a975f69150...@gmail.com
