# DB_MPOOLFILE->set_ftype

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    #include <db.h>

    int
    DB_MPOOLFILE->set_ftype(DB_MPOOLFILE *mpf, int ftype);

# Description

The DB_MPOOLFILE->set_ftype function specifies a file type for the purposes of input or output processing of the files pages as they are read from or written to, the backing filesystem store. The ftype argument must be the same as a ftype argument previously specified to the DB_ENV->memp_register function. (See the DB_ENV->memp_register documentation for more information.)

The DB_MPOOLFILE->set_ftype function returns a non-zero error value on failure and 0 on success.

# Errors

The DB_MPOOLFILE->set_ftype function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_MPOOLFILE->set_ftype function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

# See Also

DB_ENV->set_cachesize, DB_ENV->set_mp_mmapsize, DB_ENV->memp_fcreate, DB_MPOOLFILE->close, DB_MPOOLFILE->get, DB_MPOOLFILE->open, DB_MPOOLFILE->put, DB_MPOOLFILE->set, DB_MPOOLFILE->sync, DB_ENV->memp_register, DB_MPOOLFILE->set_clear_len, DB_MPOOLFILE->set_fileid, DB_MPOOLFILE->set_ftype, DB_MPOOLFILE->set_lsn_offset, DB_MPOOLFILE->set_pgcookie, DB_ENV->memp_stat, DB_ENV->memp_sync, and DB_ENV->memp_trickle.`

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