The Linux Programming Interface

56 Chapter 3

void

err_exit(const char *format, ...)

{

va_list argList;

va_start(argList, format);

outputError(TRUE, errno, FALSE, format, argList);

va_end(argList);

terminate(FALSE);

}

void

errExitEN(int errnum, const char *format, ...)

{

va_list argList;

va_start(argList, format);

outputError(TRUE, errnum, TRUE, format, argList);

va_end(argList);

terminate(TRUE);

}

void

fatal(const char *format, ...)

{

va_list argList;

va_start(argList, format);

outputError(FALSE, 0, TRUE, format, argList);

va_end(argList);

terminate(TRUE);

}

void

usageErr(const char *format, ...)

{

va_list argList;

fflush(stdout); /* Flush any pending stdout */

fprintf(stderr, "Usage: ");

va_start(argList, format);

vfprintf(stderr, format, argList);

va_end(argList);

fflush(stderr); /* In case stderr is not line-buffered */

exit(EXIT_FAILURE);

}