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Dir : ~/proc/thread-self/root/usr/lib/emacsen-common/

Edit File: emacs-package-install

#!/usr/bin/perl -w

use Errno;
use strict;

my $lib_dir = "/usr/lib/emacsen-common";
my $invoked_by_old_pkg;
my $context;
my $pkg;

require $lib_dir . "/lib.pl";

umask 0022 or die "emacs-package-install: can't set umask, aborting.";

sub usage
{
  my($file_handle) = @_;
  if($invoked_by_old_pkg)
  {
    print $file_handle "Usage: emacs-package-install FLAVOR\n";
  }
  else
  {
    print $file_handle
        "Usage: emacs-package-install (--preinst|--postinst) FLAVOR\n";
  }
}

sub is_new_pkg
{
  my($pkg) = @_;
  return (-e  "$lib_dir/packages/compat/$pkg");
}

if(scalar(@ARGV) == 1)
{
  $invoked_by_old_pkg = 1;
  $pkg = $ARGV[0];
  $context = 'postinst';
}
elsif (scalar(@ARGV) == 2)
{
  if($ARGV[0] eq '--preinst') { $context = 'preinst'; }
  elsif($ARGV[0] eq '--postinst') { $context = 'postinst'; }
  else
  {
    usage(*STDERR{IO});
    exit(1);
  }
  $pkg = $ARGV[1];
}
else
{
  usage(*STDERR{IO});
  exit(1);
}

if($context eq 'preinst')
{
  die "ERROR: cannot unlink $::installed_package_state_dir/$pkg: $!, "
      unless (unlink("$::installed_package_state_dir/$pkg") or $!{ENOENT});
  exit(0);
}

# Must be --postinst.

validate_add_on_pkg($pkg, 'emacs-package-install', $invoked_by_old_pkg);

# Mark package as safe to attempt to setup.
ex('touch', "$::installed_package_state_dir/$pkg");

# Get all the packages $pkg depends on, dependency sorted.
my @pkgs_to_handle = generate_add_on_install_list([$pkg]);
my @installed_flavors = get_installed_flavors();

foreach my $pkg (@pkgs_to_handle)
{
  my $script = $lib_dir . "/packages/install/$pkg";

if(is_new_pkg($pkg))
  {
    foreach my $flavor (@installed_flavors)
    {
      print "Install $pkg for $flavor\n";
      if(-e $script && (system($script, $flavor) != 0))
      {
        print STDERR "ERROR: install script from $pkg package failed\n";
        exit(1);
      }
    }
  }
  else # old pkg
  {
    print "Install $pkg for emacs\n";
    ex($script, 'emacs', @installed_flavors) if -e $script;

foreach my $flavor (@installed_flavors)
    {
      print "Install $pkg for $flavor\n";
      if(-e $script && (system($script, $flavor, @installed_flavors) != 0))
      {
        print STDERR "ERROR: install script from $pkg package failed\n";
        exit(1);
      }
    }
  }
}