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+ GNU GENERAL PUBLIC LICENSE
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+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+#!/usr/bin/perl
+
+# Script: pg_upgrade_conf.pl
+# Copyright: 28/12/2014: Glyn Astill <glyn@8kb.co.uk>
+# Requires: Perl 5.10.1+
+#
+# This script is a command-line utility to transplant PostgreSQL
+# server settings from one conf file or server to another.
+# Primarily intended for copying current settings in postgresql.conf
+# into the default copy provided by a newer version to maintain
+# information regarding new settings and defaults.
+#
+# This script is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This script 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this script. If not, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+use DBI;
+use v5.10.1;
+use File::Copy;
+use Getopt::Long qw/GetOptions/;
+Getopt::Long::Configure qw/no_ignore_case/;
+
+use constant false => 0;
+use constant true => 1;
+
+my $g_debug = false;
+my %g_gucs;
+my %g_gucs_src;
+my $g_non_default_count = 0;
+my $g_change_count = 0;
+my $g_usage = 'pg_upgrade_conf.pl { -f <path> [ -a <path> ] | -c <conninfo> } { -F <path> | -C <conninfo> }
+
+-f --old_file Path to the old configuration file to read settings from
+-a --old_auto_file Path to the old auto configuration file to read settings set vial ALTER SYSTEM from
+-c --old_conninfo Conninfo of the old server to read settings from
+-F --new_file Path to the new configuration file to alter
+-C --new_conninfo Conninfo of the new server to apply settings via ALTER SYSTEM';
+
+
+use vars qw{%opt};
+die $g_usage unless GetOptions(\%opt, 'old_file|f=s', 'old_auto_file|a=s', 'new_file|F=s', 'old_conninfo|c=s', 'new_conninfo|C=s')
+ and keys %opt and ! @ARGV;
+
+if (defined($opt{old_file})) {
+ loadSourceFromFile($opt{old_file});
+ if (defined($opt{old_auto_file})) {
+ loadSourceFromFile($opt{old_auto_file});
+ }
+}
+elsif (defined($opt{old_conninfo})) {
+ loadSourceFromConninfo($opt{old_conninfo});
+}
+
+print "Found $g_non_default_count non-default settings in old configuration\n";
+
+if (defined($opt{new_file})) {
+ $g_change_count = modifyNewFile($opt{new_file});
+}
+elsif (defined($opt{new_conninfo})) {
+ $g_change_count = modifyNewConninfo($opt{new_conninfo});
+ if ($g_change_count > 0) {
+ print "WARNING: $g_change_count changes made to postgresql.auto.conf using ALTER SYSTEM; these will override any values set in postgresql.conf\n";
+ }
+}
+
+print "Made $g_change_count changes to new configuration\n";
+
+sub loadSourceFromFile {
+ my $old_file = shift;
+ my $key;
+ my $value;
+ my $src;
+ my @fields;
+
+ if (open(OLDFILE, "<", $old_file)) {
+ foreach (<OLDFILE>) {
+ chomp $_;
+ unless ($_ =~ /^#/) {
+ for ($_) {
+ s/\r//;
+ s/#(?=(?:(?:[^']|[^"]*+'){2})*+[^']|[^"]*+\z).*//;
+ }
+ if (length(trim($_))) {
+ @fields = split('=', $_, 2);
+ $key = trim($fields[0]);
+ $value = trim($fields[1]);
+ $src = $old_file;
+ if ($g_debug) {
+ print "DEBUG: Source file key = $key value = $value src = $src\n";
+ }
+ if (exists($g_gucs{$key})) {
+ print "WARNING: Source value for $key specified more than once, overwriting $g_gucs{$key} from $g_gucs_src{$key} with $value from $src\n";
+ }
+ else {
+ $g_non_default_count++;
+ }
+ $g_gucs{$key} = $value;
+ $g_gucs_src{$key} = $src;
+ }
+ }
+ }
+ close (OLDFILE);
+ }
+ else {
+ print "ERROR: Unable to open $old_file for reading\n";
+ }
+}
+
+sub loadSourceFromConninfo {
+ my $old_conninfo = shift;
+
+ my $key;
+ my $value;
+ my $src;
+ my @fields;
+
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+
+ $dsn = "DBI:Pg:$old_conninfo;";
+ eval {
+ $dbh = DBI->connect($dsn, '', '', {RaiseError => 1});
+ $query = "SELECT name, CASE vartype WHEN 'string' THEN quote_literal(reset_val) ELSE reset_val END, sourcefile
+ FROM pg_catalog.pg_settings WHERE boot_val <> reset_val AND source = 'configuration file'
+ AND context <> 'internal'";
+ $sth = $dbh->prepare($query);
+ $sth->execute();
+ while (my @fields = $sth->fetchrow) {
+ $key = trim($fields[0]);
+ $value = trim($fields[1]);
+ $src = trim($fields[2]);
+ if ($g_debug) {
+ print "DEBUG: Source setting key = $key value = $value src = $src\n";
+ }
+ $g_gucs{$key} = $value;
+ $g_gucs_src{$key} = $src;
+ $g_non_default_count++;
+ }
+ $sth->finish;
+ };
+ if ($@) {
+ print "ERROR: $@\n";
+ }
+}
+
+sub modifyNewFile {
+ my $new_file = shift;
+ my $key;
+ my $value;
+ my @lines;
+ my @fields;
+ my $pushed;
+ my $comment;
+ my $setting = 0;
+ my $change_count = 0;
+ my $not_written = false;
+
+ if (open(NEWFILE, "<", $new_file)) {
+ foreach (<NEWFILE>) {
+ chomp $_;
+ $pushed = false;
+ $comment = true;
+ if ($_ =~ /=/) {
+ @fields = split('=', $_, 2);
+ $key = $fields[0];
+ $key =~ s/^#(.*)$/$1/;
+ $key = trim($key);
+ $value = trim($fields[1]);
+ for ($value) {
+ s/\r//;
+ s/#(?=(?:(?:[^']|[^"]*+'){2})*+[^']|[^"]*+\z).*//;
+ }
+ $value = trim($value);
+ if ($g_debug) {
+ print "DEBUG: Target file key = $key value = $value\n";
+ }
+ if (exists($g_gucs{$key})) {
+ if (($_ !~ /^#/) && ($value eq $g_gucs{$key})) {
+ $setting++;
+ # Setting is already present and not commented out/default
+ print "$setting) Not setting $key : already the values are already the same $value = $g_gucs{$key}\n";
+ $g_gucs{$key} = '[written]';
+ }
+ else {
+ if ($_ !~ /^#/) {
+ $_ = '#' . $_;
+ $comment = false;
+ }
+ push(@lines, $_);
+ $pushed = true;
+ if ($g_gucs{$key} ne '[written]') {
+ $setting++;
+ print "$setting) Setting $key to $g_gucs{$key} : was " . (($comment)?"commented out / set to default":"set to") . " $value\n";
+ push(@lines, $key . ' = ' . $g_gucs{$key});
+ $g_gucs{$key} = '[written]';
+ $change_count++;
+ }
+ }
+ }
+ }
+ unless ($pushed) {
+ push(@lines, $_);
+ }
+ }
+ close(NEWFILE);
+
+
+ foreach $key (keys %g_gucs) {
+ if ($g_gucs{$key} ne '[written]') {
+ $not_written = true;
+ last;
+ }
+ }
+
+ if ($not_written) {
+ push(@lines, '');
+ push(@lines, '#' . '-'x78);
+ push(@lines, '# Unmatched settings written by pg_upgrade_conf.pl');
+ push(@lines, '#' . '-'x78);
+ foreach $key (keys %g_gucs) {
+ if ($g_gucs{$key} ne '[written]') {
+ $setting++;
+ print "$setting) No place holder for setting $key : adding $key = $g_gucs{$key}\n";
+ push(@lines, $key . ' = ' . $g_gucs{$key});
+ }
+ }
+ }
+
+ copy($new_file, $new_file . '.bak');
+
+ if (open(NEWFILE, ">", $new_file)) {
+ foreach (@lines) {
+ if ($g_debug) {
+ print "DEBUG: Line = $_\n";
+ }
+ print NEWFILE "$_\n";
+ }
+ close(NEWFILE);
+ }
+ else {
+ print "ERROR: Unable to open $new_file for writing\n";
+ }
+ }
+ else {
+ print "ERROR: Unable to open $new_file for reading\n";
+ }
+ return $change_count;
+}
+
+sub modifyNewConninfo {
+ my $new_conninfo = shift;
+ my $version;
+ my $key;
+ my $value;
+
+ my $setting = 0;
+ my $change_count = 0;
+ my $dsn;
+ my $dbh;
+ my $sth;
+ my $query;
+
+ $dsn = "DBI:Pg:$new_conninfo;";
+ eval {
+ $dbh = DBI->connect($dsn, '', '', {RaiseError => 1});
+ $query = "SHOW server_version";
+ $sth = $dbh->prepare($query);
+ $sth->execute();
+ $version = $sth->fetchrow;
+
+ unless (substr($version,0,3) >= 9.4) {
+ die "PostgreSQL server version 9.4 or later required to apply changes with ALTER SYSTEM\n";
+ }
+
+ foreach $key (keys %g_gucs) {
+ $setting++;
+ $query = "SELECT CASE vartype WHEN 'string' THEN quote_literal(reset_val) ELSE reset_val END
+ FROM pg_catalog.pg_settings WHERE lower(name) = lower(?)";
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, $key);
+ $sth->execute();
+ $value = $sth->fetchrow;
+ if ($g_debug) {
+ print "$setting) KEY: $key SVAL: $value VAL: $g_gucs{$key}\n";
+ }
+ if ($value eq $g_gucs{$key}) {
+ print "$setting) Not setting $key : already the values are already the same $value = $g_gucs{$key}\n";
+ }
+ else {
+ print "$setting) Setting $key to $g_gucs{$key} : was set to $value\n";
+ $query = "ALTER SYSTEM SET " . qtrim($key) . " TO ?";
+ $sth = $dbh->prepare($query);
+ $sth->bind_param(1, qtrim($g_gucs{$key}));
+ $sth->execute();
+ $change_count++;
+ }
+ }
+
+ $sth->finish();
+ };
+ if ($@) {
+ print "ERROR: $@\n";
+ }
+ return $change_count;
+}
+
+sub trim {
+ my $string = shift;
+ $string =~ s/^\s+//;
+ $string =~ s/\s+$//;
+ return $string;
+}
+
+sub qtrim {
+ my $string = shift;
+ $string =~ s/^('|")+//;
+ $string =~ s/('|")+$//;
+ return $string;
+}
projects / postgresql / pg_upgrade_conf / commitdiff