Linux file function-lseek

Linux file function-write

A location file

Function Name: Lseek

Function prototype:

off_t lseek (int fd, off_t offset, int whence)

function function: Move file pointer

Owning header file:

#include <sys/types.h>

#include <unistd.h>

return value:

Success: Returns the number of bytes of the moved file pointer to the beginning of the file that is the offset

Failure: Return-1

Parameter description

FD: Descriptor of the file to locate

Offset: offsets, integers move backward, negative numbers move forward

Whence: Location of the file pointer

Seek_set: Set the position of the file pointer, moving from the beginning of the file to the position of the offset parameter

Seek_cur: Set offset offset to the current file location

Seek_end: Set to end of file, only negative

Linux file function-lseek