libexplain/buffer/errno/gethostname.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/string.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/buffer/efault.h>
#include <libexplain/buffer/einval.h>
#include <libexplain/buffer/enametoolong.h>
#include <libexplain/buffer/enosys.h>
#include <libexplain/buffer/errno/generic.h>
#include <libexplain/buffer/errno/gethostname.h>
#include <libexplain/buffer/is_the_null_pointer.h>
#include <libexplain/buffer/pointer.h>
#include <libexplain/buffer/size_t.h>
#include <libexplain/buffer/software_error.h>
#include <libexplain/explanation.h>
#include <libexplain/host_name_max.h>

Go to the source code of this file.

Functions
static void	explain_buffer_errno_gethostname_system_call (explain_string_buffer_t *sb, int errnum, char *data, size_t data_size)
static size_t	get_actual_hostname_size (void)
static void	explain_buffer_errno_gethostname_explanation (explain_string_buffer_t *sb, int errnum, char *data, size_t data_size)
void	explain_buffer_errno_gethostname (explain_string_buffer_t *sb, int errnum, char *data, size_t data_size)

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Function Documentation

void explain_buffer_errno_gethostname	(	explain_string_buffer_t *	sb,
		int	errnum,
		char *	data,
		size_t	data_size
	)

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

Definition at line 150 of file gethostname.c.

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

Definition at line 82 of file gethostname.c.

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

Definition at line 39 of file gethostname.c.

static size_t get_actual_hostname_size

(

void

)

[static]

Definition at line 52 of file gethostname.c.