lo_lseek

Function

Change the current read or write position of a large object descriptor.

int lo_lseek(PGconn* conn, int fd, int offset, int whence);

Table 1 lo_lseek parameters

Keyword	Parameter Description
conn	A database connection
fd	File descriptor
offset	Move the current position pointer of the file descriptor to the new position specified by offset
whence	Anchor from the beginning of the object, from the current position, or from the end of the object

int The return value is the new location pointer, or -1 on error.

Change the current read or write position of a large object descriptor that may exceed 2GB in size.

long int lo_lseek64(PGconn *conn, int fd, long int offset, int whence);

Table 1 lo_lseek64 parameter

Keyword	Parameter Description
conn	A database connection
fd	File descriptor
offset	Move the current position pointer of the file descriptor to the new position specified by offset
whence	Anchor from the beginning of the object, from the current position, or from the end of the object

int The return value is the new location pointer, or -1 on error.

For details, see Example.