Troubles with dependencies (file -L is broken?)

[Maxim Sobolev]

Hi,

I am trying to portupgrade my subversion and it keeps trying to install
databases/db42 over already installed version (same version), missing the
shared library dependency.

Adding some debug into bsd.port.mk, I see:

===>   subversion-1.8.3 depends on package: libtool>=2.4 - found
set -x; set -e ;  for i in libdb-4.2.so:/usr/ports/databases/db42; do
lib=${i%%:*} ;  dir=${i#*:}  ;  target="install";  depends_args="";  echo
-n "===>   subversion-1.8.3 depends on shared library: ${lib}" ;  found=0
;  dirs="/lib /usr/lib /usr/local/lib `/bin/cat
/usr/local/libdata/ldconfig/* 2>/dev/null || : `" ;  for libdir in $dirs;
do  test -f ${libdir}/${lib} || continue;  if [ -x /usr/bin/file ]; then  [
`file -b -L --mime-type ${libdir}/${lib}` = "application/x-sharedlib" ] ||
continue ;  fi ;  found=1 ;  echo " - found";  done ;  if [ ${found} -eq 0
]; then  echo " - not found";  echo "===>    Verifying for $lib in $dir";
if [ ! -d "$dir" ] ; then  echo "    => No directory for $lib.
Skipping..";  else  if [ -n "" -o -n "" ]; then  subpkgfile=`(cd $dir; make
$depends_args -V PKGFILE)`;  subpkgname=${subpkgfile%-*} ;
subpkgname=${subpkgname##*/} ;  if [ -r "${subpkgfile}" -a "$target" =
"install" ]; then  echo "===>   Installing existing package
${subpkgfile}";  if [ -n "" -a ${subpkgname} = "pkg" ]; then  [ -d
/usr/ports/devel/subversion/work ] || /bin/mkdir -p
/usr/ports/devel/subversion/work ;  /usr/bin/tar xf ${subpkgfile} -C
/usr/ports/devel/subversion/work -s ",/.*/,,g" "*/pkg-static" ;
/usr/ports/devel/subversion/work/pkg-static add ${subpkgfile};  /bin/rm -f
/usr/ports/devel/subversion/work/pkg-static;  else  /usr/sbin/pkg_add
${subpkgfile};  fi;  elif [ -n "" -a "${target}" = "install" ]; then  echo
"===>   subversion-1.8.3 depends on package: ${subpkgfile} - not found";
echo "===>   USE_PACKAGE_DEPENDS_ONLY set - will not build from source";
exit 1;  else  (cd $dir; make -DINSTALLS_DEPENDS $target $depends_args) ;
fi;  else  (cd $dir; make -DINSTALLS_DEPENDS $target $depends_args) ;  fi;
echo "===>   Returning to build of subversion-1.8.3";  fi ;  fi ;  done
+ set -e
+ lib=libdb-4.2.so
+ dir=/usr/ports/databases/db42
+ target=install
+ depends_args=''
+ echo -n '===>   subversion-1.8.3 depends on shared library: libdb-4.2.so'
===>   subversion-1.8.3 depends on shared library: libdb-4.2.so+ found=0
+ /bin/cat /usr/local/libdata/ldconfig/compat7x
/usr/local/libdata/ldconfig/mysql /usr/local/libdata/ldconfig/portupgrade
/usr/local/libdata/ldconfig/pth
+ dirs='/lib /usr/lib /usr/local/lib /usr/local/lib/compat
/usr/local/lib/mysql
/usr/local/lib/compat/pkg
/usr/local/lib/pth'
+ test -f /lib/libdb-4.2.so
+ continue
+ test -f /usr/lib/libdb-4.2.so
+ continue
+ test -f /usr/local/lib/libdb-4.2.so
+ [ -x /usr/bin/file ]
+ file -b -L --mime-type /usr/local/lib/libdb-4.2.so
+ [ inode/symlink = application/x-sharedlib ]
+ continue
+ test -f /usr/local/lib/compat/libdb-4.2.so
+ continue
+ test -f /usr/local/lib/mysql/libdb-4.2.so
+ continue
+ test -f /usr/local/lib/compat/pkg/libdb-4.2.so
+ continue
+ test -f /usr/local/lib/pth/libdb-4.2.so
+ continue
+ [ 0 -eq 0 ]
+ echo ' - not found'
 - not found
+ echo '===>    Verifying for libdb-4.2.so in /usr/ports/databases/db42'
===>    Verifying for libdb-4.2.so in /usr/ports/databases/db42

So, file(1) call is the culprit here. Trying to reproduce in the console:

[sobomax at pioneer ~]$ file -b -L --mime-type /usr/local/lib/libdb-4.2.so
inode/symlink

However:

[sobomax at pioneer ~]$ hexdump -C /usr/local/lib/libdb-4.2.so | head -n 20
00000000  7f 45 4c 46 02 01 01 09  00 00 00 00 00 00 00 00
|.ELF............|
00000010  03 00 3e 00 01 00 00 00  d0 40 02 00 00 00 00 00
|..>.....п@......|
00000020  40 00 00 00 00 00 00 00  b8 a6 0e 00 00 00 00 00
|@.......╦і......|
00000030  00 00 00 00 40 00 38 00  05 00 40 00 1d 00 1a 00  |.... at .8...@
.....|
00000040  01 00 00 00 05 00 00 00  00 00 00 00 00 00 00 00
|................|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
|................|
00000060  dc 45 0e 00 00 00 00 00  dc 45 0e 00 00 00 00 00
|эE......эE......|
00000070  00 00 20 00 00 00 00 00  01 00 00 00 06 00 00 00  |..
.............|
00000080  00 50 0e 00 00 00 00 00  00 50 2e 00 00 00 00 00
|.P.......P......|
00000090  00 50 2e 00 00 00 00 00  fc 36 00 00 00 00 00 00
|.P......Э6......|
000000a0  d8 3a 00 00 00 00 00 00  00 00 20 00 00 00 00 00  |ь:........
.....|
000000b0  02 00 00 00 06 00 00 00  e8 54 0e 00 00 00 00 00
|........ХT......|
000000c0  e8 54 2e 00 00 00 00 00  e8 54 2e 00 00 00 00 00
|ХT......ХT......|
000000d0  a0 01 00 00 00 00 00 00  a0 01 00 00 00 00 00 00
|═.......═.......|
000000e0  08 00 00 00 00 00 00 00  50 e5 74 64 04 00 00 00
|........PЕtd....|
000000f0  5c 39 0d 00 00 00 00 00  5c 39 0d 00 00 00 00 00
|\9......\9......|
00000100  5c 39 0d 00 00 00 00 00  b4 34 00 00 00 00 00 00
|\9......Є4......|
00000110  b4 34 00 00 00 00 00 00  04 00 00 00 00 00 00 00
|Є4..............|

The culprit is that /usr/local/lib/libdb-4.2.so is a symlink to another
symlink to another symlink etc, so that my guess is that file(1) stops at
the first one. The issue can be resolved by using realpath(1), attached
patch fixes it for me.

[sobomax at pioneer ~]$ realpath /usr/local/lib/libdb-4.2.so
/usr/local/lib/db42/libdb-4.2.so.2
[sobomax at pioneer ~]$ file -b -L --mime-type
/usr/local/lib/db42/libdb-4.2.so.2
application/x-sharedlib
[sobomax at pioneer ~]$ ls -l /usr/local/lib/libdb-4.2.so
lrwxr-xr-x  1 root  wheel  14  7 сен 21:43 /usr/local/lib/libdb-4.2.so ->
libdb-4.2.so.2

I am not sure what's the process to get bsd.port.mk adjusted these days.
Should I open a PR and assign it to portmgr?

-Maxim
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