forwarded 575731 te...@tug.org
thanks
Dear Karl, dear all @tex-k
here a quite detailed bug report about parallel calls to pdftex and
-recorder.
Any comments?
On Mo, 29 Mär 2010, Kirill Smelkov wrote:
> Package: texlive-binaries
> Version: 2009-5
> Severity: normal
> File: /usr/bin/pdftex
>
> Hello,
>
> I use -recorder option in my TeX makefile in order to automatically
> generate TeX dependencies (a-la gcc -MD) and discovered that -recorder
> does not work correctly for parallel TeX runs. Look e.g. here:
>
> $ cat 1.tex
> Hello World
> \end
>
> $ strace tex -recorder 1.tex 2>&1 | grep fls
> open("tex.fls", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
> rename("tex.fls", "1.fls") = 0
>
> $ strace pdftex -recorder 1.tex 2>&1 | grep fls
> open("pdftex.fls", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
> rename("pdftex.fls", "1.fls") = 0
>
>
> As can bee seen both tex/pdftex first use intermediate temporary file
> (tex.fls / pdftex.fls) and only then rename it to $(jobname).fls
>
> So the problem here is that when I try to compile both 1.tex and 2.tex
> _simultaneously_ (e.g. through make -j2) there is a good chance that
> both tex runs will open the same pdftex.fls and then oops, resulting
> .fls will be wrong.
>
> texk/web2c/lib/openclose.c suggests mkstemp would be a better option
> instead of using intermediate <program>.fls :
>
> /* Helpers for the filename recorder... */
> /* Start the recorder */
> static void
> recorder_start(void)
> {
> /* Alas, while we might want to use mkstemp it is not portable.
> So we have to be content with using a default name... */
> string cwd;
>
> recorder_name = (string)xmalloc(strlen(kpse_program_name)+5);
> strcpy(recorder_name, kpse_program_name);
> strcat(recorder_name, ".fls");
>
> ...
>
>
> /* Change the name of the recorder file. */
> void
> recorder_change_filename (string new_name)
> {
> if (!recorder_file)
> return;
> rename(recorder_name, new_name);
> free(recorder_name);
> recorder_name = xstrdup(new_name);
> }
>
>
> but I wonder, why use intermediate file for recorder at all? Why not to
> open $(jobname).fls in the first place?
>
>
> Thanks,
> Kirill
Best wishes
Norbert
------------------------------------------------------------------------
Norbert Preining prein...@{jaist.ac.jp, logic.at, debian.org}
JAIST, Japan TU Wien, Austria Debian TeX Task Force
DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094
------------------------------------------------------------------------
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