libexplain/buffer/errno/ioctl.c File Reference

#include <libexplain/ac/ctype.h>
#include <libexplain/ac/string.h>
#include <libexplain/buffer/errno/ioctl.h>
#include <libexplain/buffer/fildes_to_pathname.h>
#include <libexplain/iocontrol.h>
#include <libexplain/explanation.h>

Go to the source code of this file.

Functions
static int	last_char (const char *s)
static void	system_call (const explain_iocontrol_t *p, explain_string_buffer_t *sb, int errnum, int fildes, int request, const void *data)
void	explain_buffer_errno_ioctl (explain_string_buffer_t *sb, int errnum, int fildes, int request, void *data)

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Function Documentation

void explain_buffer_errno_ioctl	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	fildes,
		int	request,
		void *	data
	)

The explain_buffer_errno_ioctl function is used to obtain an explanation of an error returned by the ioctl(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 safe 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.
fildes	The original fildes, exactly as passed to the ioctl(2) system call.
request	The original request, exactly as passed to the ioctl(2) system call.
data	The original data, exactly as passed to the ioctl(2) system call.

Definition at line 86 of file ioctl.c.

static int last_char

(

const char *

s

)

[static]

Definition at line 29 of file ioctl.c.

static void system_call	(	const explain_iocontrol_t *	p,
		explain_string_buffer_t *	sb,
		int	errnum,
		int	fildes,
		int	request,
		const void *	data
	)		[static]

Definition at line 40 of file ioctl.c.