libexplain/message/fchown.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/fchown.h>

Go to the source code of this file.

Functions
void	explain_message_fchown (char *message, int message_size, int fildes, int owner, int group)

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Function Documentation

void explain_message_fchown	(	char *	message,
		int	message_size,
		int	fildes,
		int	owner,
		int	group
	)

The explain_message_fchown function is used to obtain an explanation of an error returned by the fchown(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.

The errno global variable will be used to obtain the error value to be decoded.

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

 if (fchown(fildes, owner, group) < 0)
 {
     char message[3000];
     explain_message_fchown(message, sizeof(message), fildes, owner, group);
     fprintf(stderr, "%s\n", message);
     exit(EXIT_FAILURE);
 }

The above code example is available pre-packaged as the explain_fchown_or_die function.

Parameters:

message	The location in which to store the returned message. If a suitable message return buffer is supplied, this function is thread safe.
message_size	The size in bytes of the location in which to store the returned message.
fildes	The original fildes, exactly as passed to the fchown(2) system call.
owner	The original owner, exactly as passed to the fchown(2) system call.
group	The original group, exactly as passed to the fchown(2) system call.

Definition at line 25 of file fchown.c.