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https://issues.apache.org/jira/browse/IO-111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12471517
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Henri Yandell commented on IO-111:
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I think it should be expected in the path, so my vote here is wontfix.
> FileSystemUtils.freeDiskSpaceUnix does not work if df is not in the shell path
> ------------------------------------------------------------------------------
>
> Key: IO-111
> URL: https://issues.apache.org/jira/browse/IO-111
> Project: Commons IO
> Issue Type: Bug
> Affects Versions: 1.2, 1.3
> Environment: Solaris
> Reporter: Xavier Soudan
> Priority: Minor
>
> if the df command is not in the path, the method freeSpaceUnix throws an
> exception:
> java.io.IOException: df: not found
> at java.lang.UNIXProcess.forkAndExec(Native Method)
> at java.lang.UNIXProcess.<init>(UNIXProcess.java:53)
> at java.lang.ProcessImpl.start(ProcessImpl.java:65)
> at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
> at java.lang.Runtime.exec(Runtime.java:591)
> at java.lang.Runtime.exec(Runtime.java:464)
> at
> org.apache.commons.io.FileSystemUtils.openProcessStream(FileSystemUtils.java:357)
> at
> org.apache.commons.io.FileSystemUtils.freeSpaceUnix(FileSystemUtils.java:298)
> Rather than expecting df is in the path, it should be searched in the
> following standard location:
> /usr/bin/df
> /usr/sbin/df
> /bin/df
> /sbin/df
> /usr/ucb/df
> /usr/xpg4/bin/df
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