table of contents
COMEDI_STRERROR(3) | Comedi reference | COMEDI_STRERROR(3) |
NAME¶
comedi_strerror - return string describing Comedilib error codeSYNOPSIS¶
#include <comedilib.h>
const char *
comedi_strerror(int errnum);
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_strerror returns a pointer to a character string describing the Comedilib error errnum. The returned string may be modified by a subsequent call to a strerr or perror function (either the libc or Comedilib versions). An unrecognized error number will return a pointer to the string “undefined error”, or similar.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.
COPYRIGHT¶
Copyright © 1998-2003 David Schleef07/06/2012 | Comedi |