util.c

   1 /* util.c - util functions */
   2
   3 /* Copyright (C) 2007 Keith Rarick and Philotic Inc.
   4
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <errno.h>
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include "util.h"
  26
  27 char *progname; /* defined as extern in util.h */
  28
  29 void
  30 v()
  31 {
  32 }
  33
  34 static void
  35 vwarnx(const char *err, const char *fmt, va_list args)
  36 {
  37     fprintf(stderr, "%s: ", progname);
  38     if (fmt) {
  39         vfprintf(stderr, fmt, args);
  40         if (err) fprintf(stderr, ": %s", strerror(errno));
  41     }
  42     fputc('\n', stderr);
  43 }
  44
  45 void
  46 warn(const char *fmt, ...)
  47 {
  48     va_list args;
  49     va_start(args, fmt);
  50     vwarnx(strerror(errno), fmt, args);
  51     va_end(args);
  52 }
  53
  54 void
  55 warnx(const char *fmt, ...)
  56 {
  57     va_list args;
  58     va_start(args, fmt);
  59     vwarnx(NULL, fmt, args);
  60     va_end(args);
  61 }