libexplain/read_on_error.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/read.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions
ssize_t	explain_read_on_error (int fildes, void *data, size_t data_size)

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Function Documentation

ssize_t explain_read_on_error	(	int	fildes,
		void *	data,
		size_t	data_size
	)

The explain_read_on_error function is used to call the read(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_read(3) function.

This function is intended to be used in a fashion similar to the following example:

 ssize_t result = explain_read_on_error(fildes, data, data_size);
 if (result < 0)
 {
     ...cope with error
     ...no need to print error message
 }

Parameters:

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

Returns:

The value returned by the wrapped read(2) system call.

Definition at line 27 of file read_on_error.c.