A number of syscall commands are intended for file system server applications, such as a Network File System server. Although it is unlikely that you would implement a Network File System server using REXX, you can access the server callable services using z/OS UNIX REXX syscall commands. Because it is possible for a server to create a file in the file hierarchy with a name that cannot be accessed through conventional C functions, for example, a file name that has a slash (/) in it, these syscall commands might be useful if you need to obtain local access to such a file.

For more information about these services, see z/OS UNIX System Services File System Interface Reference.