Files created by applications running in the servant will have permission bits set according to the default umask. To change the default umask for the servant, specify the _EDC_UMASK_DFLT environment variable in the JCL procedure for the servant. Deployment manager and application servers require group read/write access to the data in their config root.
Deployment manager and application servers require group read/write access to the data in their config root. The server must run with a 077 umask in order to support system management functions. Do not change this umask setting and your server will function correctly.
PARM='ENVAR("_EDC_UMASK_DFLT=xxx")where xxx is the umask value to use (which is 077).
Recommendation: A umask value of 077 will cause directories to be created with permission bits set to 700. This is the value recommended by IBM.
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WebSphere Application Server security for z/OS Related reference
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