libexplain/buffer/errno/eventfd.h File Reference

#include <libexplain/string_buffer.h>

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Functions
void	explain_buffer_errno_eventfd (explain_string_buffer_t *sb, int errnum, unsigned int initval, int flags)

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Function Documentation

void explain_buffer_errno_eventfd	(	explain_string_buffer_t *	sb,
		int	errnum,
		unsigned int	initval,
		int	flags
	)

The explain_buffer_errno_eventfd function is used to obtain an explanation of an error returned by the eventfd(2) system call. The least the message will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail.

Parameters:

sb	The string buffer to print the message into. If a suitable buffer is specified, this function is thread safe.
errnum	The error value to be decoded, usually obtained from the errno global variable just before this function is called. This is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno.
initval	The original initval, exactly as passed to the eventfd(2) system call.
flags	The original flags, exactly as passed to the eventfd(2) system call.

Definition at line 93 of file eventfd.c.