Hi all,
I can't work out why a cgi script which fires off latex to process a
file in /tmp does not seem to be able to write the dvi file or its log
file. The application creates a file called 192.168.1.4.tex fine.
But latex won't run on it from the cgi script.
This is the command I am using in perl:
system("date > /tmp/chemlabel.log; latex $latex_file >> /tmp/chemlabel.log") && \
die "can't run latex on $latex_file !";
The apache error log says
can't run latex on /tmp/192.168.1.4.tex !
so that comes from the die statement and shows that its getting the
right filename and 192.168.1.4.tex is being created.
after running this cgi script FROM my web application
/tmp$ ls -l
total 23
-rw-r--r-- 1 www-data www-data 288 Oct 31 17:40 192.168.1.4.tex
-rw-r--r-- 1 www-data www-data 195 Oct 31 17:40 chemlabel.log
you can see that the output of the attempt to run latex on the file is
in chemlabel.log
/tmp$ cat chemlabel.log
Wed Oct 31 17:40:43 EST 2001
This is TeX, Version 3.14159 (Web2C 7.3.1)
! I can't write on file `192.168.1.4.log'.
Please type another transcript file name:
! Emergency stop
No pages of output.
OK so it seems like latex running as user www-data can't write its log
file 192.168.4.log etc.
If I su to www-data from root so that I am that user then I can run
latex on the file quite OK as you can see here:
/tmp$ latex 192.168.1.4.tex <-- note I am user: www-data now
This is TeX, Version 3.14159 (Web2C 7.3.1)
(192.168.1.4.tex
LaTeX2e <1998/12/01> patch level 1
....
Output written on 192.168.1.4.dvi (1 page, 292 bytes).
Transcript written on 192.168.1.4.log.
Now an ls -l shows...
-rw-r--r-- 1 www-data www-data 8 Oct 31 17:43 192.168.1.4.aux
-rw-r--r-- 1 www-data www-data 292 Oct 31 17:43 192.168.1.4.dvi
-rw-r--r-- 1 www-data www-data 2304 Oct 31 17:43 192.168.1.4.log
-rw-r--r-- 1 www-data www-data 288 Oct 31 17:40 192.168.1.4.tex
-rw-r--r-- 1 www-data www-data 195 Oct 31 17:40 chemlabel.log
viewing the dvi file shows its all ok and as expected www-data was able
to write the log file and the dvi file .
But agian if I try to run it from the web browser firing off the cgi
script then the chemlabel.log file shows a new date (which means it is
being written to ok) but that mesasage that latex can't write on
192.168.1.4.log
But www-data owns the file and should be able to write to it.
-rw-r--r-- 1 www-data www-data 2304 Oct 31 17:43 192.168.1.4.log
At a loss.
Mike
--
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Michael Lake
Active caver, Linux enthusiast and interested in anything technical.
Safety Convenor, Australian Speleological Federation
Owner, Speleonics (Australia) <^~^::^~^>
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