table of contents
COMEDI_PERROR(3) | Comedi reference | COMEDI_PERROR(3) |
NAME¶
comedi_perror - print a Comedilib error messageSYNOPSIS¶
#include <comedilib.h>
void
comedi_perror(const char * s);
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 with comedi_errno. This error number can be converted to a human-readable form by the functions comedi_perror or 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_perror prints an error message to the standard error output stream stderr. The error message consists of the argument string s, a colon, a space, a description of the error condition, and a new line.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 |