# db_env_set_func_write |

`

###

    #include <db.h>

    int
    db_env_set_func_write(
        ssize_t (*func_write)(int fd, const void *buffer, size_t nbytes));

# Description

Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX) write function with func_write, which must conform to the standard interface.

The db_env_set_func_write interface affects the entire application, not a single database or database environment.

While the db_env_set_func_write interface may be used to configure Berkeley DB at any time during the life of the application, it should normally be called before making any calls to the db_env_create or db_create functions.

The db_env_set_func_write function returns a non-zero error value on failure and 0 on success.

# Errors

EINVAL
  An invalid flag value or parameter was specified.

# See Also

db_env_set_func_close, db_env_set_func_dirfree, db_env_set_func_dirlist, db_env_set_func_exists, db_env_set_func_free, db_env_set_func_fsync, db_env_set_func_ioinfo, db_env_set_func_malloc, db_env_set_func_map, db_env_set_func_open, db_env_set_func_read, db_env_set_func_realloc, db_env_set_func_seek, db_env_set_func_sleep, db_env_set_func_unlink, db_env_set_func_unmap, db_env_set_func_write and db_env_set_func_yield.`

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