explain_vfprintf_or_die(3) Library Functions Manual explain_vfprintf_or_die(3) NAME explain_vfprintf_or_die - formatted output conversion and report errors SYNOPSIS #include <libexplain/vfprintf.h> void explain_vfprintf_or_die(FILE *fp, const char *format, va_list ap); int explain_vfprintf_on_error(FILE *fp, const char *format, va_list ap); DESCRIPTION The explain_vfprintf_or_die function is used to call the vfprintf(3) system call. On failure an explanation will be printed to stderr, obtained from the explain_vfprintf(3) function, and then the process terminates by call- ing exit(EXIT_FAILURE). The explain_vfprintf_on_error function is used to call the vfprintf(3) sys- tem call. On failure an explanation will be printed to stderr, obtained from the explain_vfprintf(3) function, but still returns to the caller. fp The fp, exactly as to be passed to the vfprintf(3) system call. format The format, exactly as to be passed to the vfprintf(3) system call. ap The ap, exactly as to be passed to the vfprintf(3) system call. RETURN VALUE The explain_vfprintf_or_die function only returns on success, see vf- printf(3) for more information. On failure, prints an explanation and ex- its, it does not return. The explain_vfprintf_on_error function always returns the value return by the wrapped vfprintf(3) system call. EXAMPLE The explain_vfprintf_or_die function is intended to be used in a fashion similar to the following example: explain_vfprintf_or_die(fp, format, ap); SEE ALSO vfprintf(3) formatted output conversion explain_vfprintf(3) explain vfprintf(3) errors exit(2) terminate the calling process COPYRIGHT libexplain version 1.3 Copyright (C) 2010 Peter Miller explain_vfprintf_or_die(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLE | SEE ALSO | COPYRIGHT
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