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)

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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:

fildes	The fildes, exactly as to be passed to the pread(2) system call.
data	The data, exactly as to be passed to the pread(2) system call.
data_size	The data_size, exactly as to be passed to the pread(2) system call.
offset	The 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.