Geek asks and answers

Java executes command "find" returns error

The following terminal operations are not a problem

find testDir -type f -exec md5sum {} \;

Where testDiris the directory containing some files (for example, file1, file2 and file3).

However, I get an error using the following in Java

Runtime rt = Runtime.getRuntime();
Process pr = rt.exec("find testDir -type f -exec md5sum {} \\;");

Error

find: missing argument to `-exec'

I believe that I am avoiding characters correctly. I have tried several different formats and I cannot get this to work.

UPDATE @jtahlborn answered the question perfectly. But now the team has changed a bit to sort each file in the directory before calculating md5sum and as follows (I already accepted a great answer to the original question so that I could buy a beer if they can come up with a format for this. I tried every combination I can come up with following answer without success.)

"find testDir -type f -exec md5sum {} + | awk {print $1} | sort | md5sum;"

, , , .

Runtime rt = Runtime.getRuntime();
Process pr = rt.exec(new String[] 
{
    "sh", "-l", "-c", "find " + directory.getPath() + " -type f -exec md5sum {} + | awk '{print $1}' | sort | md5sum"
});
+5
2

exec ( ). , script, :

Process pr = rt.exec(new String[]{"find", "testDir", "-type", "f", "-exec", "md5sum", "{}", ";"});
+5

, pipe, , Runtime.exec.

Runtime rt = Runtime.getRuntime();
Process pr = rt.exec(new String[] 
{
    "sh", "-l", "-c", "find " + directory.getPath() + " -type f -exec md5sum {} + | awk '{print $1}' | sort | md5sum"
});
0

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