libexplain  1.4.D001
Functions
libexplain/buffer/errno/ioctl.h File Reference
#include <libexplain/string_buffer.h>

Go to the source code of this file.

Functions

void explain_buffer_errno_ioctl (explain_string_buffer_t *sb, int errnum, int fildes, int request, void *data)

Function Documentation

void explain_buffer_errno_ioctl ( explain_string_buffer_t sb,
int  errnum,
int  fildes,
int  request,
void *  data 
)

The explain_buffer_errno_ioctl function is used to obtain an explanation of an error returned by the ioctl(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:
sbThe string buffer to print the message into. If a safe buffer is specified, this function is thread safe.
errnumThe 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.
fildesThe original fildes, exactly as passed to the ioctl(2) system call.
requestThe original request, exactly as passed to the ioctl(2) system call.
dataThe original data, exactly as passed to the ioctl(2) system call.

Definition at line 86 of file ioctl.c.