On Sat, 8 Apr 2006, Steve Litt wrote:
Hi Steve
I think I understand what you're doing, but would you mind explaining why?
best regards
/Christian
PS. Then I could add what you wrote to some wiki page if you'd like, but
only if I can understand the purpose :-)
> On Saturday 08 April 2006 03:34 pm, Steve Litt wrote:
> > Hi all,
> >
> > Is there a way I can have something in my LyX file (maybe a comment
> > environment or something), and have it occur in the PDF output without
> > having it print or be viewable?
> >
> > If that's not possible, is there a way I can "brand" a PDF with a number
> > somehow? I have pdftk.
> >
> > Thanks
> >
> > SteveT
>
> Here's how it's done, assuming you want to tweak org.pdf so it includes
> metadata MYKEY=MYVALUE in the output PDF, tweaked.pdf:
>
> [EMAIL PROTECTED] ~]$ pdftk org.pdf dump_data output mymetadata.txt
> [EMAIL PROTECTED] ~]$ echo InfoKey: MYKEY >> mymetadata.txt
> [EMAIL PROTECTED] ~]$ echo InfoValue: MYVALUE >> mymetadata.txt
> [EMAIL PROTECTED] ~]$ pdftk org.pdf update_info mymetadata.txt output
> tweaked.pdf
>
> You've now put metadata key MYKEY with value MYVALUE into tweaked.pdf. You
> can
> quickly pull that data out with my check_pdf.sh script:
>
> [EMAIL PROTECTED] ~]$ ./check_pdf.sh tweaked.pdf MYKEY
> [EMAIL PROTECTED] ~]$
>
> Here's the (bash script) code for check_pdf.sh, which I put in the public
> domain and disclaim all warranty and liability:
>
> #!/bin/bash
> cat $1 | grep -a "$2" | sed -e "s/.*$2\s*//" | format_pdf_metadata_value.exe
>
> format_pdf_metadata_value.exe simply grabs the value from the line containing
> the key. It should work under Linux or Windows (or BSD, which I assume would
> make it Mac compatible). Here is the C source code for
> format_pdf_metadata_value.exe, which I put in the public domain and disclaim
> all warranty and liability:
>
> #include <stdio.h>
> int main(int argc, char *argv[])
> {
> int ord = getc(stdin);
> int count = 0;
>
> /* GO TO OPENING PAREN */
> for(; ord != '(' && count < 20; count++, ord=getc(stdin));
> if(count >= 20) /* magic number, much bigger than needed */
> {
> fprintf(stderr, "Value not found\n");
> return(1);
> }
>
> /* GO PAST OPENING PAREN */
> for(; ord == '('; ord=getc(stdin));
>
> /* BLOW OFF LEADING NONPRINTABLES */
> for(;((ord < 0) || (ord > 127)); ord = getc(stdin));
>
> /* PRINT UP TO BUT NOT INCLUDING CLOSING PAREN */
> /* DO NOT PRINT ALL THE NULL BYTES */
> for(; ord != ')'; ord = getc(stdin))
> if(ord != 0)
> putc(ord, stdout);
> return 0;
> }
>
>
>
--
Christian Ridderström, +46-8-768 39 44 http://www.md.kth.se/~chr
