libexplain/buffer/errno/dup2.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/fcntl.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/buffer/check_fildes_range.h>
#include <libexplain/buffer/ebadf.h>
#include <libexplain/buffer/eintr.h>
#include <libexplain/buffer/einval.h>
#include <libexplain/buffer/emfile.h>
#include <libexplain/buffer/errno/dup2.h>
#include <libexplain/buffer/errno/generic.h>
#include <libexplain/buffer/fildes_to_pathname.h>
#include <libexplain/buffer/gettext.h>
#include <libexplain/explanation.h>
#include <libexplain/option.h>

Go to the source code of this file.

Functions
static void	explain_buffer_errno_dup2_system_call (explain_string_buffer_t *sb, int errnum, int oldfd, int newfd)
static void	explain_buffer_errno_dup2_explanation (explain_string_buffer_t *sb, int errnum, int oldfd, int newfd)
void	explain_buffer_errno_dup2 (explain_string_buffer_t *sb, int errnum, int oldfd, int newfd)

---

Function Documentation

void explain_buffer_errno_dup2	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	oldfd,
		int	newfd
	)

The explain_buffer_errno_dup2 function is used to obtain an explanation of an error returned by the dup2(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.
oldfd	The original oldfd, exactly as passed to the dup2(2) system call.
newfd	The original newfd, exactly as passed to the dup2(2) system call.

Definition at line 132 of file dup2.c.

static void explain_buffer_errno_dup2_explanation	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	oldfd,
		int	newfd
	)		[static]

Definition at line 51 of file dup2.c.

static void explain_buffer_errno_dup2_system_call	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	oldfd,
		int	newfd
	)		[static]

Definition at line 38 of file dup2.c.