table of contents
COMEDI_ERRNO(3) | Comedi reference | COMEDI_ERRNO(3) |
NAME¶
comedi_errno - number of last Comedilib errorSYNOPSIS¶
#include <comedilib.h>
int comedi_errno(void);
DESCRIPTION¶
When a Comedilib function fails, it usually returns -1 or NULL, depending on the return type. An internal library variable stores an error number, which can be retrieved by calling comedi_errno This error number can be converted to a human-readable form by the functions comedi_perror and comedi_strerror. These functions are intended to mimic the behavior of the standard C library functions perror, strerror, and errno. In particular, Comedilib functions sometimes return an error that is generated inside the C library; the comedi error message in this case is the same as the C library. The function comedi_errno returns an integer describing the most recent Comedilib error. This integer may be used as the errnum parameter for comedi_strerror.AUTHORS¶
David Schleef <ds@schleef.org>Author.
Frank Mori Hess <fmhess@users.sourceforge.net>
Author.
Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
Author.
Bernd Porr <tech@linux-usb-daq.co.uk>
Author.
Ian Abbott <abbotti@mev.co.uk>
Author.
Éric Piel <piel@delmic.com>
Author.
COPYRIGHT¶
Copyright © 1998-2003 David Schleef07/14/2014 | Comedi |