Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
explain_vprintf_or_die(3)  Library Functions Manual  explain_vprintf_or_die(3)

NAME
       explain_vprintf_or_die -	formatted output conversion and	report errors

SYNOPSIS
       #include	<libexplain/vprintf.h>
       int explain_vprintf_or_die(const	char *format, va_list ap);
       int explain_vprintf_on_error(const char *format,	va_list	ap);

DESCRIPTION
       The explain_vprintf_or_die function is used to call the vprintf(3) sys-
       tem call. On failure an explanation will	be printed to stderr, obtained
       from  the  explain_vprintf(3) function, and then	the process terminates
       by calling exit(EXIT_FAILURE).

       The explain_vprintf_on_error function is	used to	 call  the  vprintf(3)
       system  call.  On failure an explanation	will be	printed	to stderr, ob-
       tained from the explain_vprintf(3) function, but	still returns  to  the
       caller.

       format  The  format,  exactly  as to be passed to the vprintf(3)	system
	       call.

       ap      The ap, exactly as to be	passed to the vprintf(3) system	call.

RETURN VALUE
       The  explain_vprintf_or_die  function  only  returns  on	 success,  see
       vprintf(3)  for more information. On failure, prints an explanation and
       exits, it does not return.

       The explain_vprintf_on_error function always returns the	 value	return
       by the wrapped vprintf(3) system	call.

EXAMPLE
       The explain_vprintf_or_die function is intended to be used in a fashion
       similar to the following	example:
	      int result = explain_vprintf_or_die(format, ap);

SEE ALSO
       vprintf(3)
	       formatted output	conversion

       explain_vprintf(3)
	       explain vprintf(3) errors

       exit(2) terminate the calling process

COPYRIGHT
       libexplain version 1.3
       Copyright (C) 2010 Peter	Miller

						     explain_vprintf_or_die(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | SEE ALSO | COPYRIGHT

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=explain_vprintf_or_die&sektion=3&manpath=FreeBSD+12.1-RELEASE+and+Ports>

home | help