Revert "Skip .DS_Store files in server side utils"

This reverts commit d3fdfdcd1c7f1b714a9a85b893d2c5afc60bea91.
Per failure reports from the buildfarm.

doc/src/sgml/protocol.sgml

@@ -2835,7 +2835,7 @@ The commands accepted in replication mode are:
         <para>
          Files other than regular files and directories, such as symbolic
          links (other than for the directories listed above) and special
-         device and operating system files, are skipped.  (Symbolic links
+         device files, are skipped.  (Symbolic links
          in <filename>pg_tblspc</filename> are maintained.)
         </para>
        </listitem>

doc/src/sgml/ref/pg_basebackup.sgml

@@ -832,8 +832,7 @@ PostgreSQL documentation
    The backup will include all files in the data directory and tablespaces,
    including the configuration files and any additional files placed in the
    directory by third parties, except certain temporary files managed by
-   PostgreSQL and operating system files.  But only regular files and
-   directories are copied, except that
+   PostgreSQL.  But only regular files and directories are copied, except that
    symbolic links used for tablespaces are preserved.  Symbolic links pointing
    to certain directories known to PostgreSQL are copied as empty directories.
    Other symbolic links and special device files are skipped.

doc/src/sgml/ref/pg_rewind.sgml

@@ -374,9 +374,8 @@ GRANT EXECUTE ON function pg_catalog.pg_read_binary_file(text, bigint, bigint, b
       <filename>backup_label</filename>,
       <filename>tablespace_map</filename>,
       <filename>pg_internal.init</filename>,
-      <filename>postmaster.opts</filename>,
-      <filename>postmaster.pid</filename> and
-      <filename>.DS_Store</filename> as well as any file or directory
+      <filename>postmaster.opts</filename>, and
+      <filename>postmaster.pid</filename>, as well as any file or directory
       beginning with <filename>pgsql_tmp</filename>, are omitted.
      </para>
     </step>

src/backend/replication/basebackup.c

@@ -1262,10 +1262,6 @@ sendDir(const char *path, int basepathlen, bool sizeonly, List *tablespaces,
 					strlen(PG_TEMP_FILE_PREFIX)) == 0)
 			continue;
 
-		/* Skip macOS system files */
-		if (strcmp(de->d_name, ".DS_Store") == 0)
-			continue;
-
 		/*
 		 * Check if the postmaster has signaled us to exit, and abort with an
 		 * error in that case. The error handler further up will call

src/bin/pg_basebackup/t/010_pg_basebackup.pl

@@ -73,16 +73,6 @@ foreach my $filename (
 	close $file;
 }
 
-# Test that macOS system files are skipped. Only test on non-macOS systems
-# however since creating incorrect .DS_Store files on a macOS system may have
-# unintended side effects.
-if ($Config{osname} ne 'darwin')
-{
-	open my $file, '>>', "$pgdata/.DS_Store";
-	print $file "DONOTCOPY";
-	close $file;
-}
-
 # Connect to a database to create global/pg_internal.init.  If this is removed
 # the test to ensure global/pg_internal.init is not copied will return a false
 # positive.
@@ -151,12 +141,6 @@ foreach my $filename (
 	ok(!-f "$tempdir/backup/$filename", "$filename not copied");
 }
 
-# We only test .DS_Store files being skipped on non-macOS systems
-if ($Config{osname} ne 'darwin')
-{
-	ok(!-f "$tempdir/backup/.DS_Store", ".DS_Store not copied");
-}
-
 # Unlogged relation forks other than init should not be copied
 ok(-f "$tempdir/backup/${baseUnloggedPath}_init",
 	'unlogged init fork in backup');

src/bin/pg_checksums/pg_checksums.c

@@ -338,10 +338,6 @@ scan_directory(const char *basedir, const char *subdir, bool sizeonly)
 					strlen(PG_TEMP_FILES_DIR)) == 0)
 			continue;
 
-		/* Skip macOS system files */
-		if (strcmp(de->d_name, ".DS_Store") == 0)
-			continue;
-
 		snprintf(fn, sizeof(fn), "%s/%s", path, de->d_name);
 		if (lstat(fn, &st) < 0)
 		{

src/bin/pg_checksums/t/002_actions.pl

@@ -3,7 +3,6 @@
 
 use strict;
 use warnings;
-use Config;
 use PostgresNode;
 use TestLib;
 use Test::More tests => 63;
@@ -111,12 +110,6 @@ append_to_file "$pgdata/global/pgsql_tmp/1.1",        "foo";
 append_to_file "$pgdata/global/pg_internal.init",     "foo";
 append_to_file "$pgdata/global/pg_internal.init.123", "foo";
 
-# These are non-postgres macOS files, which should be ignored by the scan.
-# Only perform this test on non-macOS systems though as creating incorrect
-# system files may have side effects on macOS.
-append_to_file "$pgdata/global/.DS_Store", "foo"
-	unless ($Config{osname} eq 'darwin');
-
 # Enable checksums.
 command_ok([ 'pg_checksums', '--enable', '--no-sync', '-D', $pgdata ],
 	"checksums successfully enabled in cluster");

src/bin/pg_rewind/filemap.c

@@ -749,10 +749,6 @@ isRelDataFile(const char *path)
 		}
 	}
 
-	/* Skip macOS system files */
-	if (strstr(path, ".DS_Store") != NULL)
-		return FILE_ACTION_NONE;
-
 	/*
 	 * The sscanf tests above can match files that have extra characters at
 	 * the end. To eliminate such cases, cross-check that GetRelationPath

src/bin/pg_rewind/t/003_extrafiles.pl

@@ -2,7 +2,6 @@
 
 use strict;
 use warnings;
-use Config;
 use TestLib;
 use Test::More tests => 5;
 
@@ -45,10 +44,6 @@ sub run_test
 	append_to_file
 	  "$test_standby_datadir/tst_standby_dir/standby_subdir/standby_file3",
 	  "in standby3";
-	# Skip testing .DS_Store files on macOS to avoid risk of side effects
-	append_to_file
-	  "$test_standby_datadir/tst_standby_dir/.DS_Store",
-	  "macOS system file" unless ($Config{osname} eq 'darwin');
 
 	mkdir "$test_master_datadir/tst_master_dir";
 	append_to_file "$test_master_datadir/tst_master_dir/master_file1",