POSTREVERSE(1)      RISC/os Reference Manual       POSTREVERSE(1)



NAME
     postreverse - reverse the page order in a PostScript file

OPSIS
     postreverse [options] [file]

DESCRIPTION
     The postreverse filter reverses the page order in files that
     conform to Adobe's Version 1.0 or Version 2.0 file structur-
     ing conventions, and writes the results on the standard out-
     put.  Only one input file is allowed and if no file is
     specified, the standard input is read.  The following
     options are understood:

     o list    Select pages whose numbers are given in the
               comma-separated list.  The list contains single
               numbers N and ranges N1 - N2.  A missing N1 indi-
               cates the lowest numbered page, a missing N2 indi-
               cates the highest.

     r         Don't reverse the pages in file.

     The postreverse filter can handle a limited class of files
     that violate page independence, provided all global defini-
     tions are bracketed by %%BeginGlobal and %%EndGlobal com-
     ments.  In addition, files that mark the end of each page
     with %%EndPage: label ordinal comments will also reverse
     properly, provided the prologue and trailer sections can be
     located.  If postreverse fails to find an %%EndProlog or
     %%EndSetup comment, the entire file is copied, unmodified,
     to the standard output.

     Because global definitions are extracted from individual
     pages and put in the prologue, the output file can be
     minimally conforming, even if the input file wasn't.

EXAMPLES
     To select pages 1 to 100 from file and reverse the pages:

          postreverse -o1-100 file

     To print four logical pages on each physical page and
     reverse all the pages:

          postprint -n4 file | postreverse

     To produce a minimally conforming file from output generated
     by dpost without reversing the pages:

          dpost file | postreverse -r





                        Printed 11/19/92                   Page 1

POSTREVERSE(1)      RISC/os Reference Manual       POSTREVERSE(1)



DIAGNOSTICS
     An exit status of 0 is returned if file was successfully
     processed.

NOTES
     No attempt has been made to deal with redefinitions of glo-
     bal variables or procedures.  If standard input is used, the
     input file will be read three times before being reversed.

SEE ALSO
     download(1), dpost(1), postdaisy(1), postdmd(1), postio(1),
     postmd(1), postprint(1), posttek(1).











































 Page 2                 Printed 11/19/92