src/err.c

   1 /*
   2     Copyright (C) 2001-2011 Ben Kibbey <bjk@luxsci.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02110-1301  USA
  17 */
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <stdarg.h>
  21 #include <limits.h>
  22
  23 #define err(eval, fmt, ...)     print_string(eval, 1, fmt, ## __VA_ARGS__)
  24 #define errx(eval, fmt, ...)    print_string(eval, 0, fmt, ## __VA_ARGS__)
  25 #define warn(fmt, ...)          print_string(-1, 0, fmt, ## __VA_ARGS__)
  26 #define warnx(fmt, ...)         print_string(-1, 1, fmt, ## __VA_ARGS__)
  27
  28 void print_string(int eval, int prog, const char *fmt, ...)
  29 {
  30     va_list ap;
  31     char line[LINE_MAX];
  32
  33 #ifndef HAVE___PROGNAME
  34     char *__progname = "ui";
  35 #else
  36     extern char *__progname;
  37 #endif
  38
  39     va_start(ap, fmt);
  40     vsnprintf(line, sizeof(line), fmt, ap);
  41     va_end(ap);
  42
  43     fprintf(stderr, "%s%s%s\n", (prog) ? __progname : "", (prog) ? ": " : "",
  44             line);
  45
  46     if (eval > -1)
  47         exit(eval);
  48 }