Update archive_command example to use || test, rather than if [].

diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index b2bba256f494a5d0138b7936eb9ccc565f94865b..a9722c3d38a31fa4e4e64b39caff4401f549cbcc 100644 (file)
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -1290,7 +1290,7 @@ restore_command = 'copy /mnt/server/archivedir/%f "%p"'  # Windows
       <literal>on</>, and set up an <varname>archive_command</> that performs
       archiving only when a <quote>switch file</> exists.  For example:
 <programlisting>
-archive_command = 'if [ -f /var/lib/pgsql/backup_in_progress ]; then cp -i %p /var/lib/pgsql/archive/%f &lt;/dev/null ; fi'
+archive_command = 'test ! -f /var/lib/pgsql/backup_in_progress || cp -i %p /var/lib/pgsql/archive/%f &lt; /dev/null'
 </programlisting>
       This command will perform archiving when
       <filename>/var/lib/pgsql/backup_in_progress</> exists, and otherwise