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 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #endif
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <stdarg.h>
  25
  26 #ifdef HAVE_LIMITS_H
  27 #include <limits.h>
  28 #ifndef LINE_MAX
  29 #ifdef _POSIX2_LINE_MAX
  30 #define LINE_MAX _POSIX2_LINE_MAX
  31 #else
  32 #define LINE_MAX 2048
  33 #endif
  34 #endif
  35 #endif
  36
  37 #define err(eval, fmt, ...)     print_string(eval, 1, fmt, ## __VA_ARGS__)
  38 #define errx(eval, fmt, ...)    print_string(eval, 0, fmt, ## __VA_ARGS__)
  39 #define warn(fmt, ...)          print_string(-1, 0, fmt, ## __VA_ARGS__)
  40 #define warnx(fmt, ...)         print_string(-1, 1, fmt, ## __VA_ARGS__)
  41
  42 void print_string(int eval, int prog, const char *fmt, ...)
  43 {
  44     va_list ap;
  45     char line[LINE_MAX];
  46
  47 #ifndef HAVE___PROGNAME
  48     char *__progname = "ui";
  49 #else
  50     extern char *__progname;
  51 #endif
  52
  53     va_start(ap, fmt);
  54     vsnprintf(line, sizeof(line), fmt, ap);
  55     va_end(ap);
  56
  57     fprintf(stderr, "%s%s%s\n", (prog) ? __progname : "", (prog) ? ": " : "",
  58             line);
  59
  60     if (eval > -1)
  61         exit(eval);
  62 }