compat/err.c

   1 /*
   2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <errno.h>
  18 #include <stdarg.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 static void vwarn_impl(const char*, va_list);
  24 static void vwarnx_impl(const char*, va_list);
  25
  26 static void
  27 vwarn_impl(const char *fmt, va_list ap)
  28 {
  29         fprintf(stderr, "%s: ", getprogname());
  30         vfprintf(stderr, fmt, ap);
  31         fprintf(stderr, ": %s\n", strerror(errno));
  32 }
  33
  34 static void
  35 vwarnx_impl(const char *fmt, va_list ap)
  36 {
  37         fprintf(stderr, "%s: ", getprogname());
  38         vfprintf(stderr, fmt, ap);
  39         fprintf(stderr, "\n");
  40 }
  41
  42 void
  43 err(int ret, const char *fmt, ...)
  44 {
  45         va_list ap;
  46
  47         va_start(ap, fmt);
  48         vwarn_impl(fmt, ap);
  49         va_end(ap);
  50         exit(ret);
  51 }
  52
  53 void
  54 errx(int ret, const char *fmt, ...)
  55 {
  56         va_list ap;
  57
  58         va_start(ap, fmt);
  59         vwarnx_impl(fmt, ap);
  60         va_end(ap);
  61         exit(ret);
  62 }
  63
  64 void
  65 warn(const char *fmt, ...)
  66 {
  67         va_list ap;
  68
  69         va_start(ap, fmt);
  70         vwarn_impl(fmt, ap);
  71         va_end(ap);
  72 }
  73
  74 void
  75 warnx(const char *fmt, ...)
  76 {
  77         va_list ap;
  78
  79         va_start(ap, fmt);
  80         vwarnx_impl(fmt, ap);
  81         va_end(ap);
  82 }