Index: doc/src/sgml/backup.sgml
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RCS file: /cvsroot/pgsql/doc/src/sgml/backup.sgml,v
retrieving revision 2.144
diff -c -c -r2.144 backup.sgml
*** doc/src/sgml/backup.sgml	22 Feb 2010 17:15:10 -0000	2.144
--- doc/src/sgml/backup.sgml	31 Mar 2010 23:34:20 -0000
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*** 604,614 ****
      directory).
      It is advisable to test your proposed archive command to ensure that it
      indeed does not overwrite an existing file, <emphasis>and that it returns
!     nonzero status in this case</>.  We have found that <literal>cp -i</> does
!     this correctly on some platforms but not others.  If the chosen command
!     does not itself handle this case correctly, you should add a command
!     to test for existence of the archive file.  For example, something
!     like:
  <programlisting>
  archive_command = 'test ! -f .../%f &amp;&amp; cp %p .../%f'
  </programlisting>
--- 604,615 ----
      directory).
      It is advisable to test your proposed archive command to ensure that it
      indeed does not overwrite an existing file, <emphasis>and that it returns
!     nonzero status in this case</>.  On many Unix platforms, <command>cp
!     -i</> causes copy to prompt before overwriting a file, and
!     <literal>&lt; /dev/null</> causes the prompt (and overwriting) to
!     fail.  If your platform does not support this behavior, you should
!     add a command to test for the existence of the archive file.  For
!     example, something like:
  <programlisting>
  archive_command = 'test ! -f .../%f &amp;&amp; cp %p .../%f'
  </programlisting>