libexplain  1.4.D001
Functions
libexplain/pread_or_die.c File Reference
#include <libexplain/ac/unistd.h>
#include <libexplain/output.h>
#include <libexplain/pread.h>

Go to the source code of this file.

Functions

ssize_t explain_pread_or_die (int fildes, void *data, size_t data_size, off_t offset)

Function Documentation

ssize_t explain_pread_or_die ( int  fildes,
void *  data,
size_t  data_size,
off_t  offset 
)

The explain_pread_or_die function is used to call the pread(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_pread(3) function, and then the process terminates by calling exit(EXIT_FAILURE).

Parameters:
fildesThe fildes, exactly as to be passed to the pread(2) system call.
dataThe data, exactly as to be passed to the pread(2) system call.
data_sizeThe data_size, exactly as to be passed to the pread(2) system call.
offsetThe offset, exactly as to be passed to the pread(2) system call.
Returns:
This function only returns on success, see pread(2) for more information. On failure, prints an explanation and exits, it does not return.
Example:
This function is intended to be used in a fashion similar to the following example:
 ssize_t result = explain_pread_or_die(fildes, data, data_size, offset);

Definition at line 26 of file pread_or_die.c.