libexplain/dup2_on_error.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/dup2.h>
#include <libexplain/output.h>

Go to the source code of this file.

Functions
int	explain_dup2_on_error (int oldfd, int newfd)

---

Function Documentation

int explain_dup2_on_error	(	int	oldfd,
		int	newfd
	)

The explain_dup2_on_error function is used to call the dup2(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_dup2(3) function.

This function is intended to be used in a fashion similar to the following example:

 if (explain_dup2_on_error(oldfd, newfd) < 0)
 {
     ...cope with error
     ...no need to print error message
 }

Parameters:

oldfd	The oldfd, exactly as to be passed to the dup2(2) system call.
newfd	The newfd, exactly as to be passed to the dup2(2) system call.

Returns:

The value returned by the wrapped dup2(2) system call.

Definition at line 27 of file dup2_on_error.c.