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diff -up at-3.1.14/at.c.export at-3.1.14/at.c
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--- at-3.1.14/at.c.export	2013-10-07 14:53:59.980521240 +0200
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+++ at-3.1.14/at.c	2013-10-07 14:54:35.722560527 +0200
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@@ -388,8 +388,9 @@ writefile(time_t runtimer, char queue)
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 	    unsigned int i;
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 	    for (i = 0; i < sizeof(no_export) / sizeof(no_export[0]); i++) {
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 		export = export
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-		    && (strncmp(*atenv, no_export[i],
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-				(size_t) (eqp - *atenv)) != 0);
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+			&& ((((size_t) (eqp - *atenv)) != strlen(no_export[i]))
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+			||(strncmp(*atenv, no_export[i],(size_t) (eqp - *atenv)) != 0)
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+			);
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 	    }
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 	    eqp++;
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 	}