Date: Thu, 8 Nov 2007 15:47:54 -0600 From: Dan Nelson <dnelson@allantgroup.com> To: John Smith <lbalbalba@gmail.com> Cc: Yuri Pankov <yuri.pankov@gmail.com>, FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: Re: Determine FreeBSD version of binary Message-ID: <20071108214754.GA22005@dan.emsphone.com> In-Reply-To: <6dcf0dbc0711081316h7748e759w101e5df72e1514d7@mail.gmail.com> References: <6dcf0dbc0711080901g49043bb1u1a8e38cfacbde15c@mail.gmail.com> <20071108175951.GC18314@darklight.org.ru> <6dcf0dbc0711081316h7748e759w101e5df72e1514d7@mail.gmail.com>
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In the last episode (Nov 08), John Smith said: > On Nov 8, 2007 6:59 PM, Yuri Pankov <yuri.pankov@gmail.com> wrote: > > May be not entirely correct, but close: > > > > ldd binary | grep libc.so > > Yes, that helps somewhat. At least I now know that it's FreeBSD 4.x. > And before I again forget something I forgot to mention earlier on: I > also have a file called 'kernel'. Could that somehow give somewhat > more detailed information about exactly which 4.x kernel it is, and > if so, how would I go about doing that ? Run "strings /kernel | tail" on it. There's also a better way to determine the FreeBSD version an executable was built for. As long as you didn't build world with -O2, the "file" command can print it. Note that you will need to run a 5.x or newer version of file, since even though 4.x puts the version in each binary, its file command doesn't print it. $ file /bin/ls /bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), for FreeBSD 7.0 (700052), dynamically linked (uses shared libs), FreeBSD-style, stripped $ file /mnt/oldsystem/bin/ls /mnt/oldsystem/bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1, for FreeBSD 4.2, statically linked, stripped If you like building with -O2, apply the patch in PR 101590. -- Dan Nelson dnelson@allantgroup.com
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