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The call of command:

$dir = "/path/to/source/file";
exec("cd $dir;xelatex filesource.tex", $output_array[0]);

always fails, but:

$dir = "/path/to/source/file";
exec("cd $dir;/usr/texbin/xelatex -no-pdf filesource.tex", $output_array[0]);// now we have .xdv file
exec("cd $dir;/usr/texbin/xdvipdfmx filesource.xdv", $output_array[1]); 

succeed, and result .pdf file absolutely valid. What is the trick?

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1  
Getting any errors? –  You Oct 29 '13 at 7:45
2  
XeTeX spawns an xdvipdfmx process and pipes shipped out pages to it, unless --no-pdf is specified. It's possible that this fools exec. –  egreg Oct 29 '13 at 8:56
    
I suspect xelatex without -no-pdf makes some kind .xdv but lost the path before final compilation. If it is, I want to find the way to fix this failure and understand the whole picture. –  Ruben Kazumov Oct 29 '13 at 15:31
    
did you try adding the -output-directory= option to xelatex? –  Thruston Nov 15 '13 at 11:28
    
Oh yes! I did it in my first 50 attempts. Xelatex starts produce files to the -output-directory, but eventually loses the path and can not find his own .aux file, just a moment ago made by himself. –  Ruben Kazumov Nov 15 '13 at 16:37
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