SPI_connect - Man Page

int SPI_connect(void)

int SPI_connect_ext(int options)

SPI_connect opens a connection from a C function invocation to the SPI manager. You must call this function if you want to execute commands through SPI. Some utility SPI functions can be called from unconnected C functions.

SPI_connect_ext does the same but has an argument that allows passing option flags. Currently, the following option values are available:

SPI_OPT_NONATOMIC

Sets the SPI connection to be nonatomic, which means that transaction control calls (SPI_commit, SPI_rollback) are allowed. Otherwise, calling those functions will result in an immediate error.

SPI_connect() is equivalent to SPI_connect_ext(0).

SPI_OK_CONNECT

on success

SPI_ERROR_CONNECT

on error

The man page SPI_connect_ext(3) is an alias of SPI_connect(3).