libexplain/buffer/errno/readlink.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/sys/stat.h>
#include <libexplain/buffer/eacces.h>
#include <libexplain/buffer/efault.h>
#include <libexplain/buffer/einval.h>
#include <libexplain/buffer/eio.h>
#include <libexplain/buffer/eloop.h>
#include <libexplain/buffer/enametoolong.h>
#include <libexplain/buffer/enoent.h>
#include <libexplain/buffer/enomem.h>
#include <libexplain/buffer/enotdir.h>
#include <libexplain/buffer/errno/generic.h>
#include <libexplain/buffer/errno/path_resolution.h>
#include <libexplain/buffer/errno/readlink.h>
#include <libexplain/buffer/file_type.h>
#include <libexplain/buffer/off_t.h>
#include <libexplain/buffer/pathname.h>
#include <libexplain/buffer/pointer.h>
#include <libexplain/buffer/size_t.h>
#include <libexplain/explanation.h>
#include <libexplain/is_efault.h>

Go to the source code of this file.

Functions
static void	explain_buffer_errno_readlink_system_call (explain_string_buffer_t *sb, int errnum, const char *pathname, char *data, size_t data_size)
static off_t	get_actual_size (const char *pathname)
static void	explain_buffer_errno_readlink_explanation (explain_string_buffer_t *sb, int errnum, const char *pathname, char *data, size_t data_size)
void	explain_buffer_errno_readlink (explain_string_buffer_t *sb, int errnum, const char *pathname, char *data, size_t data_size)

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Function Documentation

void explain_buffer_errno_readlink	(	explain_string_buffer_t *	sb,
		int	errnum,
		const char *	pathname,
		char *	data,
		size_t	data_size
	)

The explain_buffer_errno_readlink function is used to obtain an explanation of an error returned by the readlink(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.
pathname	The original pathname, exactly as passed to the readlink(2) system call.
data	The original data, exactly as passed to the readlink(2) system call.
data_size	The original data_size, exactly as passed to the readlink(2) system call.

Definition at line 196 of file readlink.c.

static void explain_buffer_errno_readlink_explanation	(	explain_string_buffer_t *	sb,
		int	errnum,
		const char *	pathname,
		char *	data,
		size_t	data_size
	)		[static]

Definition at line 78 of file readlink.c.

static void explain_buffer_errno_readlink_system_call	(	explain_string_buffer_t *	sb,
		int	errnum,
		const char *	pathname,
		char *	data,
		size_t	data_size
	)		[static]

Definition at line 44 of file readlink.c.

static off_t get_actual_size

(

const char *

pathname

)

[static]

Definition at line 59 of file readlink.c.