libexplain/ustat_on_error.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/linux/types.h>
#include <libexplain/ac/sys/types.h>
#include <libexplain/ac/ustat.h>
#include <libexplain/ustat.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions
int	explain_ustat_on_error (dev_t dev, struct ustat *data)

---

Function Documentation

int explain_ustat_on_error	(	dev_t	dev,
		struct ustat *	data
	)

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

Parameters:

dev	The dev, exactly as to be passed to the ustat(2) system call.
data	The data, exactly as to be passed to the ustat(2) system call.

Returns:

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

Example:

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

 if (explain_ustat_on_error(dev, data) < 0)
 {
     ...cope with error
     ...no need to print error message
 }

Definition at line 29 of file ustat_on_error.c.