Knowledge Base

Unable to create a folder or file in the target board   ________________________________________________________________________ Applicable Environment ________________________________________________________________________ Topic: Unable to create a folder or file in the target board SDP: 8.0.0, 7.1.0, 7.0.0, 6.6.0, 6.5.0, 6.5.0SP1 Target: Any supported target ________________________________________________________________________ Issue ________________________________________________________________________ Creating a directory or a file on a QNX target fails with Function not implemented or read-only file system. Example: # mkdir /var/x mkdir: /var/x: Function not implemented ________________________________________________________________________ Solution ________________________________________________________________________ If you get this error then the problem is likely that /var is a link to the /tmp directory and /tmp is owned by the QNX kernel (procnto) RAM disk /dev/shmem. The procnto RAM disk has limited file system features. Another problem can be that /var on the target is in the IFS. The IFS is a read-only boot image that represents the containing files as a file system on a system running QNX. The solution for both cases is to mount a read/write file system with full POSIX functionality such as the qnx6 filesystem. The file system must contain the directory name that also exists in the IFS before it is mounted, i.e.the /var directory in the example above. See mkqnx6fs and mkqnx6fsimg in the QNX docs on how to create a file system on a disk. See also solution 730 "Check mount point of a file". ________________________________________________________________________ NOTE: This entry has been validated against the SDP version listed above. Use caution when considering this advice for any other SDP version. For supported releases, please reach out to QNX Technical Support if you have any questions/concerns. ________________________________________________________________________ Related Attachments  None Found

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