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db_env_set_func_fsync |
#include <db.h>int db_env_set_func_fsync(int (*func_fsync)(int fd));
Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX) fsync function with func_fsync, which must conform to the standard interface specification.
The db_env_set_func_fsync method configures all operations performed by a process and all of its threads of control, not operations confined to a single database environment.
Although the db_env_set_func_fsync method may be called at any time during the life of the application, it should normally be called before making calls to the db_env_create or db_create methods.
The db_env_set_func_fsync method returns a non-zero error value on failure and 0 on success.
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