Controls whether a process automatically unshelves files.

    Format

      SYS$SETSHLV  [pidadr] ,[prcnam] ,[shlvflg]

    C Prototype

      int sys$setshlv  (unsigned int *pidadr, void *prcnam, unsigned

                       int shlvflg);

1  –  Arguments

 pidadr

    OpenVMS usage:process_id
    type:         longword (unsigned)
    access:       modify
    mechanism:    by reference
    Process identification (PID) of the process. The pidadr argument
    is the address of the PID. The pidadr argument can only refer to
    a process running on the local node. You cannot modify a process
    on a remote node.

    You must specify the pidadr argument to modify a process whose
    UIC group number is different from that of the calling process.

 prcnam

    OpenVMS usage:process_name
    type:         character-coded text string
    access:       read only
    mechanism:    by descriptor-fixed-length string descriptor
    Process name of the process. The prcnam argument is the address
    of a character string descriptor pointing to the process name.
    You identify a process with a 1- to 15-character string.

    You can only use the prcnam argument to modify a process in the
    same UIC group as the calling process. To modify a process in
    another UIC group, you must specify the pidadr argument.

 shlvflg

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    Value specifying whether automatic unshelving is to be turned on
    or off. The shlvflg argument is a longword containing this value.
    The value 0 turns automatic unshelving on. The value 1 turns
    automatic unshelving off.

2  –  Description

    The Set Automatic Unshelving service controls whether a process
    automatically unshelves files.

    The pidadr and prcnam default to the current process. If the
    longword at address pidadr is 0, the PID of the target process is
    returned.

    The setting for automatic unshelving is inherited by
    subprocesses.

    The DCL command SET PROCESS/[NO]AUTOUNSHELVE also controls
    automatic unshelving for a process; for details, see the VSI
    OpenVMS DCL Dictionary.

    Required Access or Privileges

    Depending on the operation, the calling process might need one of
    the following privileges to use $SETSHLV:

    o  GROUP privilege to modify a process in the same group, unless
       the target process has the same UIC as the calling process.

    o  WORLD privilege to modify any process in the system.

    Required Quota

    None

    Related Services

    $GETJPI

3  –  Condition Values Returned

    SS$_WASCLR         The service completed successfully. Automatic
                       unshelving was previously on.
    SS$_WASSET         The service completed successfully. Automatic
                       unshelving was previously off.
    SS$_ACCVIO         An argument was not accessible by the caller.
    SS$_BADPARAM       The shlvflg argument was invalid.
    SS$_IVLOGNAM       The prcnam argument was invalid. The process
                       name string had either 0 characters or more
                       than 15 characters.
    SS$_NONEXPR        The specified process did not exist, or the
                       specified process identification was invalid.
    SS$_NOPRIV         The caller did not have the privilege to
                       modify other processes.
    SS$_REMOTE_PROC    The specified process was not on the local
                       node. The service cannot modify a process on a
                       remote node.