svn commit: r358166 - head

[Stefan Eßer]

Am 22.02.20 um 03:50 schrieb Mark Millard via freebsd-ports:
> 
> 
> On 2020-Feb-21, at 15:59, Kevin Oberman <rkoberman at gmail.com> wrote:
> 
>> On Fri, Feb 21, 2020 at 8:38 AM Mark Millard via freebsd-ports <freebsd-ports at freebsd.org> wrote:
>> Based on the example from https://www.freebsd.org/cgi/man.cgi?ldd
>> there are commands such as the following that might help:
>>
>> . . .
>>
>> This can be a lot of files to go through (e.g., lib*) and so
>> can take a fair amount of time.
>>
>> ===
>> Mark Millard
>> marklmi at yahoo.com
>> ( dsl-only.net went
>> away in early 2018-Mar)
>>  
>> You can feed that list into 'pkg which', awk that to remove all of the commands and then all but the last space delimited string of the remainder, and uniq. I also sorted.
>> bison-3.5.2,1
>> gdbm-1.18.1_1
>> gettext-tools-0.20.1_1
>> gnuplot-5.2.8
>> llvm80-8.0.1_3
>> lua52-5.2.4
>> sqlite3-3.30.1,1
>> xterm-353_1
> 
> Cool.
> 
> In the style of my prior examples (including the change that
> found libedit and such), analogous would be:
> 
> # find /usr/local/*bin* /usr/local/lib* -type f \
> | xargs -n1 file -F ' ' | grep 'ELF' | cut -f1 -d' ' \
> | xargs ldd -f '%A %p\n' 2>&1 | grep ncurses\.so\.8 | cut -f1 -d' ' \
> | xargs pkg which | cut -f6 -d' ' | sort -u | more
> bison-3.5.2,1
> gdbm-1.18.1_1
> gettext-tools-0.20.1_1
> gnuplot-5.2.8
> libedit-3.1.20191211,1
> libtextstyle-0.20.1
> llvm10-10.0.0.r2
> llvm80-8.0.1_3
> lua52-5.2.4
> mesa-dri-18.3.2_9
> ruby-2.6.5,1
> sqlite3-3.30.1,1
> xterm-353_1
> 
> Looks like I'll be reasonably ready when I get to the point
> of wanting to deal with this.

While technically correct, the extra test for the ELF format of each
single file is not required for correct results, AFAICT.

The ldd command will just emit an error message for files it cannot
process, and the error output is trivially suppressed.


The following pipeline should only need a fraction of the time required
by the one suggested above:

# find /usr/local/*bin* /usr/local/lib* -type f \
| xargs ldd -f '%o %A\n' 2>/dev/null \
| grep ^libncurses\.so\.8 | cut -w -f2 \
| xargs pkg which -q | sort -u | more

It completes in 13 seconds on my system, and I plan to add it to
portmaster as another option to select the ports to be updated.

The test of each file for ELF format requires one invocation of the
file command for each, which leads to 217 seconds real time (178 user,
39 system) for me - so my version is faster by a factor of at least 15.

Regards, STefan