compat/err.c

   1 /*
   2  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.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 MIND, USE, DATA OR PROFITS, WHETHER
  13  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  14  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <sys/types.h>
  18
  19 #include <errno.h>
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24
  25 #include "compat.h"
  26
  27 void
  28 err(int eval, const char *fmt, ...)
  29 {
  30         va_list  ap;
  31         int      saved_errno = errno;
  32
  33         fprintf(stderr, "%s: ", getprogname());
  34
  35         va_start(ap, fmt);
  36         if (fmt != NULL) {
  37                 vfprintf(stderr, fmt, ap);
  38                 fprintf(stderr, ": ");
  39         }
  40         va_end(ap);
  41
  42         fprintf(stderr, "%s\n", strerror(saved_errno));
  43         exit(eval);
  44 }
  45
  46 void
  47 errx(int eval, const char *fmt, ...)
  48 {
  49         va_list  ap;
  50
  51         fprintf(stderr, "%s: ", getprogname());
  52
  53         va_start(ap, fmt);
  54         if (fmt != NULL)
  55                 vfprintf(stderr, fmt, ap);
  56         va_end(ap);
  57
  58         putc('\n', stderr);
  59         exit(eval);
  60 }
  61
  62 void
  63 warn(const char *fmt, ...)
  64 {
  65         va_list  ap;
  66         int      saved_errno = errno;
  67
  68         fprintf(stderr, "%s: ", getprogname());
  69
  70         va_start(ap, fmt);
  71         if (fmt != NULL) {
  72                 vfprintf(stderr, fmt, ap);
  73                 fprintf(stderr, ": ");
  74         }
  75         va_end(ap);
  76
  77         fprintf(stderr, "%s\n", strerror(saved_errno));
  78 }
  79
  80 void
  81 warnx(const char *fmt, ...)
  82 {
  83         va_list  ap;
  84
  85         fprintf(stderr, "%s: ", getprogname());
  86
  87         va_start(ap, fmt);
  88         if (fmt != NULL)
  89                 vfprintf(stderr, fmt, ap);
  90         va_end(ap);
  91
  92         putc('\n', stderr);
  93 }