pmem2_source_get_fd()

#include <libpmem2.h>
int pmem2_source_get_fd(const struct pmem2_source *src, int *fd);
    

The pmem2_source_get_fd() function reads the file descriptor of *struct pmem2_source** object describing the data source and returns it by fd parameter.

This function is Linux only, on Windows use pmem2_source_get_handle(3).

The pmem2_source_get_fd() function returns 0 on success or a negative error code on failure.

The pmem2_source_get_fd() can fail with the following errors:

• PMEM2_E_FILE_DESCRIPTOR_NOT_SET - in case of an instance of struct pmem2_source that does not come from source type that support file descriptors, eg. anonymous data source.

pmem2_source_get_handle(3), libpmem2(7) and <https://pmem.io>