#!/usr/bin/perl -w

# Copyright (C) 1997-2018 Free Software Foundation, Inc.

# This file is part of the GNU C Library.

# Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1997.

# The GNU C Library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public

# License along with the GNU C Library; if not, see

# <http://www.gnu.org/licenses/>.

$PACKAGE = "libc";

$progname = $0;

if ($ENV{CC}) {

  $CC = $ENV{CC};

} else {

  $CC= "gcc";

}

if ($ENV{LD_SO}) {

  $LD_SO = $ENV{LD_SO};

} else {

  $LD_SO = "";

}

sub usage {

  print "Usage: test-installation [soversions.mk]\n";

  print "  --help       print this help, then exit\n";

  print "  --version    print version number, then exit\n";

  exit 0;

}

sub installation_problem {

  print "The script has found some problems with your installation!\n";

  print "Please read the FAQ and the README file and check the following:\n";

  print "- Did you change the gcc specs file (necessary after upgrading from\n";

  print "  Linux libc5)?\n";

  print "- Are there any symbolic links of the form libXXX.so to old libraries?\n";

  print "  Links like libm.so -> libm.so.5 (where libm.so.5 is an old library) are wrong,\n";

  print "  libm.so should point to the newly installed glibc file - and there should be\n";

  print "  only one such link (check e.g. /lib and /usr/lib)\n";

  print "You should restart this script from your build directory after you've\n";

  print "fixed all problems!\n";

  print "Btw. the script doesn't work if you're installing GNU libc not as your\n";

  print "primary library!\n";

  exit 1;

}

arglist: while (@ARGV) {

  if ($ARGV[0] eq "--v" || $ARGV[0] eq "--ve" || $ARGV[0] eq "--ver" ||

      $ARGV[0] eq "--vers" || $ARGV[0] eq "--versi" ||

      $ARGV[0] eq "--versio" || $ARGV[0] eq "--version") {

    print "test-installation (GNU $PACKAGE)\n";

    print "Copyright (C) 2018 Free Software Foundation, Inc.\n";

    print "This is free software; see the source for copying conditions.  There is NO\n";

    print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";

    print "Written by Andreas Jaeger <aj\@arthur.rhein-neckar.de>\n";

    exit 0;

  } elsif ($ARGV[0] eq "--h" || $ARGV[0] eq "--he" || $ARGV[0] eq "--hel" ||

	   $ARGV[0] eq "--help") {

    &usage;

  } elsif ($ARGV[0] =~ /^-/) {

    print "$progname: unrecognized option `$ARGV[0]'\n";

    print "Try `$progname --help' for more information.\n";

    exit 1;

  } else {

    last arglist;

  }

}

# We expect none or one argument.

if ($#ARGV == -1) {

    $dir = ".";

    $soversions="soversions.mk";

    $config="config.make";

} elsif ($#ARGV == 0) {

    if (-d $ARGV[0]) {

      $dir = $ARGV[0];

      $soversions = "$ARGV[0]/soversions.mk";

      $config = "$ARGV[0]/config.make";

    } else {

      $soversions = $dir = $ARGV[0];

      $dir =~ s!/?[^/]*/*$!!;

      $config = $dir . "/config.make";

    }

} else {

    die "Wrong number of arguments.";

}

if (system ("grep -q \"build-mathvec = yes\" $config") == 0) {

    $build_mathvec = 1;

} else {

    $build_mathvec = 0;

}

# Read names and versions of all shared libraries that are part of

# glibc

open SOVERSIONS, $soversions

  or die ("Couldn't open $soversions in build directory!");

$link_libs = "";

%versions = ();

while (<SOVERSIONS>) {

  next if (/^all-sonames/);

  chop;

  if (/^lib/) {

    ($name, $version)= /^lib(.*)\.so-version=\.(.*)$/;

    # Filter out some libraries we don't want to link:

    # - nss_ldap since it's not yet available

    # - libdb1 since it conflicts with libdb

    # - libthread_db since it contains unresolved references

    # - it's just a test NSS module

    # - We don't provide the libgcc so we don't test it

    # - libmvec if it wasn't built

    next if ($build_mathvec == 0 && $name eq "mvec");

    if ($name ne "nss_ldap" && $name ne "db1"

	&& $name ne "thread_db"

	&& $name ne "nss_test1" && $name ne "libgcc_s") {

      $link_libs .= " -l$name";

      $versions{$name} = $version;

    }

  } elsif ($LD_SO ne "") {

    ($ld_so_name, $ld_so_version) = split ('\.so\.', $LD_SO);

  } else {

    if (/^ld\.so/) {

      ($ld_so_name, $ld_so_version)= /=(.*)\.so\.(.*)$/;

    }

  }

}

close SOVERSIONS;

# Create test program and link it against all

# shared libraries

open PRG, ">$dir/test-prg$$.c"

  or die ("Couldn't write test file $dir/test-prg$$.c");

print PRG '

#include <stdio.h>

#include <stdlib.h>

int main(void) {

  printf ("Your new glibc installation seems to be ok.\n");

  exit (0);

}

';

close PRG;

open GCC, "$CC $dir/test-prg$$.c $link_libs -o $dir/test-prg$$ 2>&1 |"

  or die ("Couldn't execute $CC!");

while (<GCC>) {

  print $_ if (! /warning/);

}

close GCC;

if ($?) {

  print "Execution of $CC failed!\n";

  &installation_problem;

}

# Test if test program is linked against the right versions of

# shared libraries

$ok = 1;

%found = ();

open LDD, "ldd $dir/test-prg$$ |"

  or die ("Couldn't execute ldd");

while (<LDD>) {

  if (/^\s*lib/) {

    ($name, $version1, $version2) =

      /^\s*lib(\w*)\.so\.([0-9\.]*)\s*=>.*\.so\.([0-9\.]*)/;

    $found{$name} = 1;

    if ($versions{$name} ne $version1 || $version1 ne $version2) {

      print "Library lib$name is not correctly installed.\n";

      print "Please check your installation!\n";

      print "Offending line of ldd output: $_\n";

      $ok = 0;

    }

  }

  if (/$ld_so_name/) {

    ($version1) = /$ld_so_name\.so\.([0-9\.]*)/;

    if ($version1 ne $ld_so_version) {

      print "The dynamic linker $ld_so_name.so is not correctly installed.\n";

      print "Please check your installation!\n";

      print "Offending line of ldd output: $_\n";

      $ok = 0;

    }

  }

}

close LDD;

die "ldd execution failed" if $?;

foreach (keys %versions) {

  unless ($found{$_}) {

    print "Library lib$_ is not correctly installed since the test program\n";

    print "was not linked dynamically against it.\n";

    print "Do you have a file/link lib$_.so?\n";

    $ok = 0;

  }

}

&installation_problem unless $ok;

# Finally execute the test program

system ("$dir/test-prg$$") == 0

  or die ("Execution of test program failed");

# Clean up after ourselves

unlink ("$dir/test-prg$$", "$dir/test-prg$$.c");